1453results about How to "Increase spacing" patented technology

The invention provides a high-rate and high-first-effect biomass hard carbon composite negative electrode material and a preparation method and application thereof, the hard carbon composite negative electrode material has a core-shell structure, the core-shell structure comprises a core, an inner shell and an outer shell, the core comprises biomass hard carbon containing P and graphite microcrystals, the inner shell comprises graphene, and the outer shell comprises a carbon nanotube. According to the invention, the surface of the biomass hard carbon is coated with the graphene layer, the carbon nanotubes grow on the surface of the graphene in situ, and transition metal synergistically induces the hard carbon to be arranged and grow along the graphene layer in a high-temperature carbonization process, so that the graphene coating layer is tightly coated, and the cycle performance of the material is improved; transition metal ions catalyze graphitization to generate a more regular and ordered graphite-like layer microcrystalline structure coating layer, so that the defects of graphene and carbon nanotubes are reduced, and the first coulombic efficiency is improved; in addition, the ion transmission capability is improved by phosphorus doping, the electron transmission capability is improved by graphite microcrystals generated by catalysis in hard carbon, and the rate capability is ensured by synergistic improvement of ion transmission and electron transmission.

The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly relates to a method for preparing a lithium ion battery negative electrode material from sulfur-doped black phosphorus-carbon. A carbon material and sulfur powder are subjected to ball milling, uniform mixing and vacuum high-temperature calcination to obtain a sulfur-doped carbon material; and uniformly mixing the sulfur-doped carbon material with black phosphorus, and performing high-energy ball milling in an inert atmosphere to obtain the sulfur-doped black phosphorus-carbon composite negative electrode material. According to the preparation method provided by the invention, the black phosphorus, the carbon material and the sulfur are well combined, so that the high capacity of the material is ensured, the structural stability of the composite material can be improved, the polarization of the material is reduced, and the cycling stability and the rate capability of the battery are improved.

The invention relates to a machine leg for a multi-legged robot, belongs to the technical field of mobile carriers, and solves the problems that in the multi-legged robot scheme in the prior art, in order to keep the distance between a trunk and the ground, a motor needs to be powered up for keeping, and limited energy carried by the multi-legged robot is wasted. The multi-legged robot leg comprises a base joint unit, a first leg unit, a second leg unit and a third leg unit, one end of the base joint unit is connected with a trunk of a multi-legged robot, the other end of the base joint unit is connected with the first leg unit, and the two ends of the second leg unit are connected with the first leg unit and the third leg unit respectively. Self-locking can be achieved by changing the first screw and the first gear, when the first motor is not powered on, the first screw can prevent the first gear from rotating, it is ensured that the included angle between the first leg unit and the trunk of the multi-legged robot is not changed, the first motor does not need to be powered on any more, and limited energy carried by the multi-legged robot is saved.

The invention relates to the technical field of all-vanadium redox flow batteries, in particular to a sulfonated polybenzimidazole proton exchange membrane as well as a preparation method and application thereof. The proton exchange membrane structurally comprises a polybenzimidazole polymer main chain and a sulfonic acid group, the free volume of the polybenzimidazole polymer is regulated and controlled by synthesizing raw materials with different structures, and the polybenzimidazole proton exchange membrane is obtained by sulfonating the polybenzimidazole polymer. Aiming at the problems of cross permeation of vanadium ion electrolyte of a positive electrode and a negative electrode of the all-vanadium redox flow battery, capacity attenuation of the all-vanadium redox flow battery and low energy conversion efficiency, the preparation method comprises the following steps: constructing a polybenzimidazole polymer main chain by selecting raw materials with high rigidity and high free volume; the mechanical property of the polybenzimidazole membrane is improved while a rapid ion channel is constructed in the polymer membrane, and water molecules can be contained to limit swelling of a membrane material.

The invention relates to the technical field of electric energy storage, in particular to an electric energy conversion device of a photovoltaic energy storage micro-grid system, which comprises a protection bin, one side of the protection bin is provided with an openable front cover, the middle part of the protection bin is recessed inwards to form a placement cavity, and a plurality of batteries are arranged in the placement cavity. A liquid storage tank is further arranged in the containing cavity, a water pump for sucking cooling liquid is arranged below the liquid storage tank, a heat conduction pipe is arranged at the output end of the water pump, a plurality of cooling devices are arranged outside the batteries, and a moving device for driving the batteries to move is arranged between the batteries and the containing cavity. Through cooperation of structures such as a first cooling plate, a second cooling plate, a first surrounding pipe, a second surrounding pipe and a conveying pipe, cooling liquid is conveyed into the cooling box through the conveying pipe, the cooling liquid is contained and cooled in the cooling box, the cooling liquid is rapidly cooled, the water cooling effect is improved, and the continuous cooling effect on a battery is improved.

The invention belongs to the field of graphite purification, and particularly relates to a segmented purification method of natural graphite. According to the method provided by the invention, natural graphite and sodium hydroxide are mixed and ground, rapid cooling is performed after microwave treatment, microwave treatment is performed after hydrofluoric acid circulation treatment, and a high-purity graphite product is obtained. In order to solve the problems that in the prior art, natural graphite is low in purity, and the conductivity is reduced after purification, according to the segmented purification method of the natural graphite, high-purity graphite with excellent conductivity is obtained through segmented alkali treatment, microwave treatment, acid treatment and microwave treatment.

The invention relates to the field of rice seedling raising. The invention discloses a rice seedling raising device and a using method, and aims to solve the problems that when existing rice is cultivated through a tray, the angle of the tray needs to be adjusted to enable the rice to be irradiated by sufficient sunlight, and when the angle of the rice is adjusted, the rice cannot be raised. Due to continuous growth of rice, the rice on stacked trays can be hindered when the angle of the trays deviates, and the rice cultivation effect is affected. The trays arranged in a clamped mode can deflect through the adjusting frames on the adjusting rods, so that the multiple trays vertically arranged at equal intervals are inclined, seedlings on the multiple trays can make full contact with sunlight conveniently, and the seedlings grow evenly.

The invention relates to the technical field of laser welding, in particular to a positioning tool for laser welding, which comprises a platform, a motor is mounted on the outer wall of one side of the platform, one end of an output shaft of the motor is connected with a two-way screw through a coupler, and the outer walls of the two sides of the two-way screw are connected with a sliding frame through threads. A first sliding groove is formed in the outer wall of one side of the sliding frame, a clamping frame is slidably connected to the inner wall of the first sliding groove, a second sliding groove is formed in the outer wall of one side of the top of the clamping frame, a locking frame is slidably connected to the inner wall of the second sliding groove, and locking plates are fixedly connected to the outer walls of the two sides of the bottom end of the locking frame. The clamping plate pushes the bottom plate, the limiting plate rotates to be horizontal to limit the top of a workpiece under the linkage effect, and after the limiting plate rotates, the locking structure automatically slides downwards to be inserted into the corresponding position of the clamping structure for locking under the gravity effect, so that the clamping and positioning effect is improved, the machining error is reduced, and the repeated positioning precision is improved; and the positioning efficiency of the laser welding positioning tool is improved.

The utility model provides a double-path double-drive adjustable spinning device which comprises a first lead screw and a second lead screw which are arranged in parallel, the first lead screw is connected with a first servo motor, the second lead screw is connected with a second servo motor, a first transmission nut seat is arranged on the first lead screw and is in threaded connection with the first lead screw, and a second transmission nut seat is arranged on the second lead screw and is in threaded connection with the second lead screw. The second lead screw is provided with a second transmission nut seat, and the second transmission nut seat is in threaded connection with the second lead screw; the first transmission nut seat is used for being connected with a fender cross beam, a yarn guide hook is arranged on the fender cross beam, the second transmission nut seat is used for being connected with a steel collar plate cross beam, and a steel collar is arranged on the steel collar plate cross beam. When different types of raw filaments are replaced, the distance between the yarn guide hook and the steel collar can be adjusted at any time through a control program, and the process requirement for twisting different types of raw filaments and the requirement for twisted yarn quality are met. In addition, the distance between the yarn guide hook and the steel collar can be roughly changed in proportion, a roughly constant yarn ballooning form is maintained, and wool yarn is reduced.

The invention relates to the technical field of lithium ion batteries, and particularly provides a preparation method of a graphite negative electrode material and the graphite negative electrode material. The problems that an existing method for improving the rate capability of a graphite negative electrode is complex in process and limited in improving effect, and high-temperature storage performance is deteriorated are solved. Therefore, the preparation method of the graphite negative electrode material comprises the following steps: S1, mixing aromatic hydrocarbon oil, thiophene and medium-high sulfur asphalt, and performing heat treatment to obtain vulcanized asphalt; s2, carrying out delayed coking on the vulcanized asphalt to obtain high-sulfur green coke; and S3, crushing the high-sulfur green coke, and then carrying out graphitization treatment to obtain the graphite negative electrode material. The graphite negative electrode material prepared by the preparation method provided by the invention has good rate capability and high-temperature storage performance.

The invention discloses winding equipment for a sensor wire, and belongs to the technical field of metal wire processing mechanisms. The conveying and cleaning mechanism comprises a first motor arranged on the frame, an output shaft of the first motor passes through a rotating wheel and extends to a lead screw shaft, and the rotating wheel is in transmission connection with a movable shaft fixed to first rotating teeth through a first conveying belt; second rotating teeth moving on the frame are in meshing transmission with the outer walls of the first rotating teeth, one ends of the first rotating teeth and one ends of the second rotating teeth are correspondingly connected to the lower cleaning roller and the upper cleaning roller respectively, and a first sliding block is in spiral transmission with the lead screw shaft. The technical problems that under the action of different conveying speeds, the conveying distance and the tension degree of the guide rollers cannot be effectively adjusted, and on the other hand, the receiving rollers are generally arranged in a fixed size and cannot be adjusted to different degrees according to different size requirements, and the applicability of the device cannot be improved easily are solved.

The invention provides a graphite composite material, a preparation method thereof and a secondary battery, and relates to the technical field of lithium ion battery negative electrode materials. The graphite composite material comprises an inner core and a shell layer, the inner core comprises metal element doped metal oxide and graphite, the metal element doped metal oxide is embedded between sheet layers of the graphite, the shell layer comprises multi-walled carbon nanotubes and amorphous carbon, and the multi-walled carbon nanotubes are distributed in the amorphous carbon in a 3D net shape. According to the invention, by introducing the doping element, the lithium intercalation active sites of the metal oxide are increased, so that the lithium storage performance of the graphite composite material is improved; through the construction of a core-shell and intercalation structure, the volume expansion of the metal oxide is inhibited, so that the cycling stability of the graphite composite material is improved.

The invention discloses a display panel and a display device. The display panel comprises a plurality of pixel units which are arranged in an array mode in the first direction and the second direction which intersect with each other, each pixel unit comprises a first pixel and a second pixel, and the light-emitting view angle of each first pixel is larger than that of each second pixel; the display modes of the display panel comprise a first mode and a second mode; in the first mode, the first pixel and the second pixel both emit light, the ith pixel unit and the jth pixel unit are in a light emitting state, the minimum distance between the sub-pixels with the same light emitting color in the first direction is a1, and the ith pixel unit is adjacent to the jth pixel unit. In the second mode, the first pixel does not emit light, the second pixel emits light, the ith pixel unit and the jth pixel unit are in a light-emitting state, the minimum distance between the sub-pixels with the same light-emitting color in the first direction is b1, and a1 is equal to b1. According to the embodiment of the invention, the problem that poor display is easy to occur when the display panel is switched to the peep-proof mode in the prior art can be solved.

The invention provides a coating-modified positive electrode material, a preparation method of the coating-modified positive electrode material, a positive electrode plate, a lithium ion battery and an electric device. The coating-modified positive electrode material comprises a substrate and a coating layer coating at least part of the surface of the substrate, the matrix comprises a lithium nickel cobalt manganese oxide material, the lithium nickel cobalt manganese oxide material comprises doping elements, and the doping elements comprise one or more of Sr, Ga, In, Ta, W, Zr, B, Al, Sb, Mo, Ti, La, Na and Sn; the coating layer comprises a bimetallic oxide, the bimetallic oxide comprises an element M and an element Q, the element M comprises one or more of Mg, Zn, Ni, Co, Cu, Ca, Fe, Be, Ba, Sr and Mn, and the element Q comprises one or more of A1, Cr, Co, Fe, Sc, Ga, In and V. The rate capability, the cycling stability and the high-temperature storage performance of the positive electrode material can be improved through the double functions of doping and coating.

The invention relates to a heat dissipation optimization method and system for a radio frequency front-end module and related equipment. The method comprises the following steps: acquiring a layout of a power amplifier in the radio frequency front-end module; continuously dividing the layout into a plurality of temperature regions according to the thermal performance of the power amplifier; obtaining an original spacing between transistors in the power amplifier; according to the original spacing, transistor optimized spacing between the transistors in the different temperature areas is obtained again; rearranging the transistors of the power amplifier according to the optimized intervals of the transistors to obtain an optimized layout; and obtaining the optimized heat dissipation optimization radio frequency front-end module according to the optimized layout. According to the invention, the layout of the transistors in the power amplifier is adjusted, so that the distance between the transistors with relatively high heat is enlarged, and the radio frequency performance of the radio frequency front-end module is improved.

The invention discloses a detection device for electrical equipment, and relates to the technical field of electrical maintenance. Comprising an operating rod, a detection structure is installed on the operating rod and comprises a rail rod, the rail rod is installed at one end of the operating rod in a T shape, detection probes are installed at the two ends of the rail rod respectively, a traction base is slidably installed on the operating rod, and the two sides of the traction base are connected with the detection probes through connecting rods respectively; the traction seat is connected with a positioning rod which is connected with a traction rope; a control structure is mounted at one end of the operating rod and comprises a control rod, and a control block is slidably mounted in the control rod; a rope loop is installed on the control block, a positioning block is arranged in the operating rod, and the traction rope is wound around the rope loop to be connected with the positioning block. The device can be accurately controlled at a longer distance for detection, and is convenient to operate and higher in safety.

The invention discloses a lithium niobate electro-optical modulator based on interdigital electrodes. The lithium niobate electro-optical modulator comprises a coplanar waveguide electrode structure containing periodically arranged interdigital electrodes, two groups of six modulation waveguides, two groups of four optical waveguide delay lines, two groups of multimode interference couplers, an input waveguide, an output waveguide and a pair of coupling gratings. According to the device, an interdigital electrode structure is used for constructing six electro-optical modulation sections in an upper group and a lower group, and optical waveguide delay lines are used for aligning phases of different electro-optical modulation sections to form an upper group of modulation arms and a lower group of modulation arms. An optical signal enters the input waveguide from the coupling grating on the left side, is divided into two beams through the multi-mode interference coupler, is subjected to equal-size and opposite modulation effects on the upper and lower groups of modulation arms, is combined and coupled in the second multi-mode interference coupler to generate an intensity modulation effect, and is output through the output waveguide and the coupling grating. The electro-optical modulator provided by the invention can be further expanded on the number of times of electrode multiplexing, and is compatible with other multiplexing technologies at the same time.

The invention discloses a sulfur-doped composite hard carbon material as well as a preparation method and application thereof. Sulfonated resin is used as a carbon source and a sulfur source, and non-metal sulfur atoms with the atomic radius larger than that of carbon are doped in situ, so that the carbon layer spacing of hard carbon is increased, and the rate capability of the hard carbon is improved; and the sulfonated resin is subjected to surface pre-coating modification by using a cheap biomass carbon source, so that the specific surface area and defect sites of hard carbon are reduced, the number of closed pores is increased, and the specific capacity and the first coulombic efficiency of the hard carbon are improved.

The invention relates to the technical field of polishing equipment, and discloses grinding and polishing equipment and a polishing process for jewelry processing.The grinding and polishing equipment comprises a shell, a polishing roller, a supporting shaft and rolling wheels, the supporting shaft is movably arranged above the shell, the rolling wheels are fixedly installed on the supporting shaft, and the polishing roller is erected between the rolling wheels; an interval adjusting mechanism is arranged on the shell; according to the grinding and polishing equipment, by arranging the supporting shaft, the rotating plate and the guide rod, the distance change of the two rolling wheels can be controlled, so that polishing rollers with different diameters can be stably erected between the two rolling wheels, and the polishing rollers with different diameters can be conveniently driven to roll by matching with the arrangement of the driving shaft; according to the jewelry grinding and polishing device, by arranging the grinding and polishing device, jewelry of different sizes can be ground and polished conveniently, meanwhile, by arranging the anti-falling mechanism, under pushing of the telescopic spring, the clamping wheels clamp the polishing roller at the same time, the four-point clamping effect can be achieved through cooperation with the rolling wheels, and the polishing roller is made to be difficult to fall off in the rotating process.

The invention discloses soft tissue high-frequency welding equipment, and belongs to the technical field of surgical operating instruments, the soft tissue high-frequency welding equipment comprises an electrocoagulation pen main body, the electrocoagulation pen main body is connected with an insulating rod, the insulating rod is further provided with a conduction pipeline parallel to a cutter head part, and a temperature sensing unit comprises a hinting structure and a telescopic action structure. The electric resection temperature of the knife head part can be sensed in real time through the action structure in the temperature sensing unit, and when the knife head part is overheated, the action structure can be converted into an extension state from an initial retraction state and triggers the indicating structure to protrude out of the surface of the electrocoagulation pen main body, so that a doctor is reminded to cool the knife head part in time; therefore, in the electric resection operation process of the hypertrophy tonsil and adenoid body of the child, the situation that the scalpel head part is overheated in the long-time continuous state of the operation and burns the tissue of the affected part of the child is effectively avoided, the safety of the soft tissue resection operation of the child is improved, and postoperative recovery and healing of the operative part of the child are facilitated.

The invention discloses a nano-diamond array preparation and miRNA ultra-sensitive detection method, and the nano-diamond array preparation comprises the following steps: self-assembling densely arranged single-layer polystyrene (PS) microsphere templates on a silicon wafer plated with a gold film, and thinning the particle size of PS microspheres by adopting a reactive ion etching process to obtain non-densely arranged PS microsphere templates; carrying out thermal evaporation on an aluminum film and ultrasonically removing the PS microspheres to obtain a micropore array; then modifying the surface of the nano-diamond containing the NV color center with a single-chain DNA probe, and self-assembling the diamond modified by the DNA probe to the nano-pore array through a gold-sulfur bond; the miRNA detection comprises the following steps: firstly, preparing a target miRNA coupled probe magnetic sphere, dropwise adding the target miRNA coupled probe magnetic sphere to the nano-diamond array, then scanning the target miRNA coupled probe magnetic sphere on the surface of the nano-diamond array through the scanning system, the microwave module and the optical path system, and collecting an optical detection magnetic resonance spectrum. The invention is expected to be applied to the field of early diagnosis of cancers.

The invention provides a full-biodegradable composite film and a preparation method thereof. The full composite membrane comprises an outer layer, a middle layer and an inner layer, wherein the outer layer comprises modified calcium carbonate, PLA, PBAT and an epoxy chain extender; the middle layer comprises modified montmorillonite, PLA (polylactic acid), PBAT (poly (butylene adipate-co-terephthalate)), PPC (polypropylene carbonate) and an epoxy chain extender; the inner layer comprises PLA (polylactic acid), PBAT (poly (butylene adipate-co-terephthalate)), an epoxy chain extender and an optional anti-blocking agent. The preparation method of the raw materials of the middle layer comprises the following steps: (i) dividing an epoxy chain extender used by the middle layer into an epoxy chain extender A and an epoxy chain extender B, and mixing PPC, modified montmorillonite and the epoxy chain extender A to prepare a first master batch of the middle layer; (ii) mixing PLA, PBAT and an epoxy chain extender B to prepare a middle-layer second master batch; and (iii) uniformly mixing the middle-layer first master batch and the middle-layer second master batch, extruding and granulating to obtain a middle-layer raw material. The full-biodegradable composite film prepared by the preparation method disclosed by the invention is good in uniformity and quality.

The invention discloses a bimorphic high-speed unmanned aerial vehicle capable of taking off and landing on the water surface and flying in ground effect and a control method, and belongs to the technical field of unmanned aerial vehicles, the bimorphic high-speed unmanned aerial vehicle comprises a vehicle body and a control device, the vehicle body is provided with an adjustable turbine jet driving mechanism and telescopic folding wings, and the tail of the vehicle body is provided with an empennage and a tail turbine jet driving mechanism. Meanwhile, the invention discloses a control method based on the two-form aircraft capable of taking off and landing on the water surface and flying in the ground effect, and the two-form high-speed unmanned aerial vehicle capable of taking off and landing on the water surface and flying in the ground effect and the control method are adopted. By adjusting the inclination angle, the distance and the height of the two front turbojet engines, operation and conversion of various forms of water sailing, ground running, ground effect flight and height flight are achieved, the use scenes of the unmanned aerial vehicle are greatly enriched, and the requirement for high-speed flight is met by adopting the telescopic folding wings.

The invention belongs to the technical field of battery modules, and particularly relates to an outdoor self-adjusting energy storage device and a use method. The multiple heat preservation plates can jointly define a circular shell; the cover plates are connected to the two ends of the circular shell respectively; the battery device comprises an annular frame and a rotating frame, the rotating frame is arranged on the inner periphery of the annular frame, a plurality of connecting bases are evenly connected to the annular frame in the circumferential direction of the annular frame, and the connecting bases are rotationally connected with rotating shafts. The rotating shaft is fixedly connected with a battery rack, battery modules are fixedly mounted on the battery rack, and the battery modules are in an arc shape and can jointly define an annular structure; a temperature sensor and a central controller are mounted in the circular shell; when the rotating frame rotates, the heat preservation plate and the cover plate can be driven to move, the battery module can be driven to move, then the temperature in the circular shell can be automatically adjusted, and the situation that the temperature of a battery is too high or too low is avoided.

The invention relates to the technical field of semiconductor packaging testing, and discloses a semiconductor packaging testing equipment track width rapid adjusting mechanism which comprises a fixing support, supporting legs fixedly installed at the bottom of the fixing support, a top plate fixedly installed at the top of the fixing support and a stabilizing plate fixedly installed on the inner wall of the fixing support. The machining device comprises a fixing support and a machining assembly arranged at the top position of the fixing support, the machining assembly comprises an adjusting mechanism installed at the top position of the fixing support, a protection mechanism is installed at the top position of the fixing support and connected with the adjusting mechanism, and an auxiliary mechanism is installed at the top position of the fixing support. The invention solves the problems that the width adjustment of the track of the existing equipment is often complicated, a large amount of time needs to be consumed, an adjusting mechanism possibly relates to a plurality of complicated manual operation steps, errors are easy to occur, and the test efficiency and accuracy are influenced.

The invention discloses a low-loss high-impedance power transformer which comprises a voltage transformation assembly, the voltage transformation assembly comprises a second shell, a power transformer body is arranged in the second shell, a driving box is embedded in the second shell and located on the ground and underground, and a ball reciprocating lead screw and a driving motor are arranged in the driving box; one end of a driving motor shaft is connected with one end of the ball reciprocating screw, and an impedance assembly is arranged at one end of the second shell; the impedance assembly comprises a first shell located at one end of the second shell, a heat dissipation and dust removal assembly is arranged on one side of the first shell, and an opening is formed in the other side of the first shell; the heat dissipation and dust removal assembly comprises a box body fixed to one side of the first shell, the bottom of the first shell is connected with the ball reciprocating lead screw, and an electric reactor is arranged in the first shell and electrically connected with the power transformer body. According to the device, the power transformer main body and the reactor can be maintained conveniently while independent heat dissipation of the power transformer main body and the reactor is guaranteed.

The invention discloses a high-waterproof and high-moisture-permeability outdoor jacket fabric and a preparation method thereof, and relates to the technical field of fabrics. The preparation method comprises the following steps: step 1, preparation of the TPU film: preparing a spinning solution A and a spinning solution B containing different porous chitosan microsphere proportions; spinning the spinning solution A to obtain an inner layer; coating an aldehyde group modified porous chitosan microsphere solution on one side of the base membrane, spinning a spinning solution B on the surface of the base membrane by taking a coating surface as a receiving layer to obtain an outer layer, and drying to obtain a composite base membrane; putting the composite base membrane into a keratinase solution, and performing pretreatment; then coating a 3-sulfopropyl acrylate potassium salt mixed solution on the surface of the outer layer, and carrying out ultraviolet irradiation at room temperature; soaking in deionized water, and drying to obtain a TPU film; 2, the TPU film and the woven fabric are subjected to hot-pressing compounding, and the outdoor jacket fabric is obtained.

The invention discloses an MOF-derived CoNiFe-LDH / CCH self-supporting electrode material and a preparation method thereof, and the preparation method comprises the steps: growing (1D) nano needle basic cobalt carbonate (CCH) on pretreated foamed nickel by adopting a hydrothermal method, and growing (3D) polyhedral ZIF-67 by taking CCH as a sacrificial template to obtain a ZIF-67 / CCH precursor; and carrying out chemical etching and ion exchange on nickel nitrate hexahydrate and ferrous sulfate heptahydrate to obtain the (2D) nanosheet coated CoNiFe-LDH / CCH self-supporting electrode material. The specific capacitance of the CoNiFe-LDH / CCH electrode material prepared under preferable conditions can reach 2856.6 F / g when the current density is 1 A / g, and a sample can keep 93.02% of the initial capacitance of the CoNiFe-LDH / CCH electrode material after 3000 times of cyclic charging and discharging. The method is environment-friendly, low in material cost and excellent in electrochemical performance, and has huge potential in practical application of supercapacitors.

The invention relates to the technical field of electric power construction, and discloses a quick paying-off and wire stripping device for electric power construction, which comprises a bearing box, a protective layer stripping assembly and an insulating layer stripping assembly are arranged on the bearing box, the protective layer stripping assembly is used for stripping a protective layer, and the insulating layer stripping assembly is used for stripping an insulating layer. According to the cable stripping device, a pre-cutting opening is formed in a protective layer through a cable stripping blade on the stripping wheel, so that a cable core cannot be exploded before formal stripping of a cable, and during formal stripping, due to the arrangement of the pre-cutting opening, the protective layer can be easily torn off, and the stability and convenience of cable stripping are effectively improved; a stripping wheel is arranged, so that a worker can control the insertion depth of a wire stripping blade into a protective layer according to the thickness of the protective layer, and the wire stripping blade is prevented from damaging a wire core; by arranging the separating table, the protective layers and the insulating layers are automatically separated, meanwhile, the distance between the insulating layers is increased, subsequent stripping treatment work on the insulating layers is facilitated, and the stripping efficiency is improved.

The utility model belongs to the technical field of chest expanders, and discloses a chest expander for physical exercise, which comprises a bottom plate, the front side and the rear side of the inside of the bottom plate are movably connected with limiting plates, and stools located at the top of the bottom plate are fixedly mounted at the tops of the limiting plates. Through the arrangement of the limiting plate, the clamping groove, the rectangular plate, the moving block and the clamping plate, an operator firstly pulls the pulling plate, then the pulling plate drives the clamping plate to stably move in the opposite direction under the limiting cooperation of the rectangular plate and the moving block, then the clamping plate exerts extrusion force on the spring, and the clamping plate leaves the interior of the clamping groove; when the operator moves the stool leftwards, the stool stably moves leftwards under the limiting action of the limiting plate, when the stool moves to the position required by the operator, the pulling plate is loosened, the spring enables the clamping plate to enter the clamping groove again due to the elastic force recovery action, and the effect of changing the distance between the stool and the pedal is achieved.