77results about How to "Reduce direct contact area" patented technology

The invention discloses a preparation method for a silicon-carbon composite negative electrode material. The preparation method comprises the steps of performing dispersing on nanometer silicon, graphite and an organic matter separately and mixing in proportion; next, performing heating and drying and heating until the temperature reaches an organic matter softening point temperature or above, and performing fusing and binding and low-temperature carbonization to obtain an organic matter cracked carbon-coated primary coating material; performing dispersing on the organic matter and the primary coating material separately and mixing in proportion; and next, performing heating and drying and heating until the temperature reaches an organic matter softening point temperature or above, and performing fusing and coating and high-temperature carbonization to obtain an organic matter cracked carbon-coated secondary coating material, namely the silicon-carbon composite negative electrode material provided by the invention. The initial reversible capacity of the negative electrode material prepared by the method can reach 649mAh/g, and the capacity retention ratio after 50 cycles can be maintained at 85.36%, and quite excellent cycling performance is shown; and in addition, the preparation method has a simple and environment-friendly process, low energy loss, rich silicon and graphite raw material resource, low cost and high safety, and is suitable for industrial production and use.

The invention relates to a positive electrode plate for a high-rate rapid-charge lithium ion battery, a negative electrode plate and the high-rate rapid-charge lithium ion battery. The positive (negative) electrode plate is characterized by comprising a positive (negative) current collector, a positive (negative) active substance coating layer and an ion conduction coating layer, wherein the positive (negative) current collector is provided with two opposite surfaces, the positive (negative) active substance coating layer is coated on at least one surface of the positive (negative) current collector, and the ion conduction coating layer is coated on the positive (negative) active substance coating layer. The high-rate rapid-charge lithium ion battery comprising the positive electrode plateand the negative electrode plate is low in internal resistance, small in charge-discharge temperature rising, high in initial charge-discharge efficiency and good in cycle property and safety.

The invention relates to the field of alkaline zinc-manganese dioxide cells, and specifically relates to an alkaline zinc-manganese dioxide cell. The alkaline zinc-manganese dioxide cell comprises a positive electrode cap (1), a positive electrode ring (2), a steel shell (3), a current collector copper nail (4), a negative electrode zinc gel (5), diaphragm paper (6), a sealing ring (7), a supportring (8) and a negative electrode bottom (9); the positive electrode ring (2) is composed of electrolytic manganese dioxide, conductive agent graphite and electrolyte; and the negative electrode zincgel (5) comprises zinc powder, a binding agent, an expanding agent, an electrolyte potassium hydroxide solution and polyethylene glycol 2000. According to the alkaline zinc-manganese dioxide cell provided by the invention, the discharge performance of the alkaline zinc-manganese dioxide cell is not influenced or even slightly improved, and the problem of expansion of the zinc gel is effectively solved; and meanwhile, the hydrogen content of the cell is remarkably reduced, and the liquid leakage risk of the cell is greatly reduced, therefore, the discharge performance of the cell is effectivelyimproved, the storage life of the cell is prolonged, and the safety performance of the cell is remarkably improved.

The invention discloses a negative material of a zinc-nickel rechargeable battery which is a composite material containing Sn6O4(OH)4-surface-modified ZnO, metal Zn powder and nano-carbon fiber, the quality percentage is 85-95 percent and 4-13 percent for Sn6O4(OH)4-surface-modified ZnO and metal Zn powder respectively, and the rest is for nano-carbon fiber, wherein the quality percentage of Sn6O4(OH)4 in ZnO is 1-25 percent. PTFE, CMC and PVA are added in the present negative material as binder, stirred uniformly with deionized water and then coated in the current collector foam nickel, and by the processes of drying and pressing, a Zn cathode is fabricated. By using the material to fabricate zinc-nickel rechargeable batteries, the batteries have long service life, stable circulation performance, and can be applied to electric tools, transportation means, electric toys, household appliances, communication instruments and lighting equipment etc.

The invention discloses a binding-phase-free WC-based hard alloy cutter material and a preparation method thereof. According to the invention, tungsten carbide is used as a base material; nano complexphase ceramic doping is adopted, and the effects of defect reinforced sintering and liquid-phase reinforced sintering are synergistically exerted; meanwhile, two-dimensional graphene nanosheets and one-dimensional carbon nanotubes are hybridized to serve as a synergistic strengthening and toughening phase and a densification phase of the binding-phase-free WC-based hard alloy cutter material; thegraphene is loaded with carbon nanotube, the graphene is supported by the carbon nanotubes; a three-dimensional strengthening and toughening and rapid heat conduction network is constructed; dispersing agents which enable the two components to be mutually dispersed; a contact area of the graphene-carbon nano tube and a cutter material matrix is increased, and a graphene and carbon nano tube synergistic toughening mechanism and a synergistic heat conduction mechanism are formed in the aspect of function, so that the bending strength, Vickers hardness and fracture toughness mechanical properties of the obtained binding-phase-free WC-based hard alloy cutter material are greatly improved. The adopted graphene-carbon nanotube three-dimensional space structure has a high heat conduction coefficient, and the heat dissipation capacity of the cutter is greatly improved.

The invention discloses a coiling needle of a square lithium battery. The coiling needle of the square lithium battery comprises a needle core and a shell, wherein two sides of the needle core have protruded acute angles and are of scabbard shapes, the inside of the needle core is hollow, through holes are uniformly distributed in the side wall of the needle core, the base part of the needle core is provided with a gas inlet communicated with the inside of the needle core, the shell is a thin shell layer wrapping the periphery of the needle core, and the thin shell layer is provided with a run-through bar-type groove. The coiling needle of the square lithium battery has high stability and good winding effect, the winding precision and the quality of the battery product are greatly improved, the scrap rate of the battery cell is lower then 10% in a winding process, and the scrap rate of a ceramic membrane is greatly reduced in a winding process.

The invention discloses a non-stick frying pan and a production process thereof. The non-stick frying pan comprises a pan body and a handle, wherein a layer of rough surface, which is formed by steel ball collision, is arranged on the inner surface of the pan body; and a water-base polytetrafluoroethylene paint is coated on the rough surface. The non-stick frying pan disclosed by the invention has the following beneficial effects: 1. through the roughness of the substrate of the pan body, adhesion force is enhanced and service life is prolonged; 2. a liquid contact area is increased and thermal energy conductivity is improved; 3. the direct contact area with solid food materials is reduced and cooking fume is relieved; 4. the non-stick frying pan is commonly used in various fire source such as an induction cooker, a gas cooker and briquette; and 5. since the pan body is thinner than a pot bottom or a pot opening, the non-stick frying pan is uniform in heat conduction and is material-saving.

The invention discloses an integrated transparent light and thin type protective mask and a manufacturing method thereof, and relates to the technical field of health protective articles. The integrated transparent light and thin type protective mask comprises a mask part tightly attached to the face of a human body; an eyeshade part, wherein the eyeshade part and the mask part are integrally formed; and a wearing piece which is arranged on the mask part and/or the eyeshade part and is used for being worn by a user. According to the invention, the functions of the mask and the goggles are integrated; the protective mask is made of a transparent film material, is tight in protection and low in manufacturing cost through an integrally-formed design, can clearly distinguish the identity of awearer through the face, and has the advantages of being simple in structure, ingenious in design, low in cost, light, comfortable, good in protection effect, uniform in airflow circulation, convenient to identify the identity and convenient to put on and take off.

The invention relates to a method for preparing paramagnetic Fe3O4-PAMAM-ZnO-TiO2 core-shell-shell-structured nanoparticles by taking polyamide-amine(PAMAM) dendrimers as a template and a separation layer in a low-temperature aqueous solution. The method is characterized in that firstly, the PAMAM dendrimers are firstly taken as the template, and a paramagnetic Fe3O4-PAMAM nanoparticle colloidal solution is prepared by adopting a coprecipitation method; secondly, the PAMAM dendrimers are added to wrap Fe3O4-PAMAM nanoparticles; thirdly, under the alkaline condition, soluble zinc salt is added to generate a ZnO shell layer; fourthly, a titanium tetrachloride solution is added to generate a TiO2 shell layer, and then the paramagnetic Fe3O4-PAMAM-ZnO-TiO2 core-shell-shell-structured nanoparticles with the complete ZnO shell layer and TiO2 shell layer are prepared. The nanoparticles can be dispersed into a solution in a single particle mode and have the higher photocatalytic activity and magnetic recovery rate.

The invention discloses a doped Li/Ni/Mn/O material and a preparation method thereof as well as a lithium ion battery. The method comprises the following steps: (1) immersing a LiNi0.5Mn1.5O4 material into a metal M salt solution to be doped; taking out the material and drying to obtain a precursor; and (2) firing the precursor under an inert atmosphere to obtain the doped Li/Ni/Mn/O material. The doped Li/Ni/Mn/O material prepared by the preparation method is used as a positive electrode material and has better conductivity, capacity retention ratio and rate capability. The preparation method has a simple preparation process and the prepared product has good homogeneity and can be put into industrial production easily. According to the preparation method, the material to be doped enters crystal lattices of an active material, namely the Li/Ni/Mn/O material, so that the aim of being doped in the Li/Ni/Mn/O material is realized. Meanwhile, the thickness of the doped material covering the surface of the active material, namely the Li/Ni/Mn/O material is reduced, so that the use amount of the covered doped material is reduced and the resistance can be reduced when lithium ions come in and go out of the positive electrode active material.

The disclosed preparation method for Sn6O4(OH)4 surface-modified ZnO battery cathode material comprises: selecting SnCl2 and ZnO by mass ratio as 1-30%, solving SnCl2 into strong HCl with mass at least as one time of the SnCl2 completely, diluting with distilled water to adjust SnCl2 concentration in 0.1-10g/L; adding ZnO to stir and filter, cleaning, and drying. This invention is simple ns reliable, and has high utility on ZnO and fit to wide application.

The embodiment of the invention provides a display panel and a manufacturing method thereof, and a display device, and related to the field of display technology, which are used to solve the problem that the encapsulation layer in the display panel in the prior art is easy to peel off. The display panel includes a display area and a non-display area surrounding the display area; the display area includes a plurality of light emitting units; each of the light emitting units includes a first electrode, a light emitting layer and a second electrode which are arranged in a stack; the non-display area includes a metal layer and an inorganic layer, which contact each other, wherein the metal layer is electrically connected to the second electrodes located in the display region, and the metal layer includes an opening, the opening is filled with an organic layer, and the organic layer is in contact with the metal layer and the inorganic layer.

The invention belongs to the technical field of food package detection, particularly relates to food package sealing detection equipment, and aims to solve the problem that a detection device is low in detection efficiency. The food package sealing detection equipment comprises a workbench, two side plates are symmetrically fixed to the two sides of the top of the workbench, and a vertical plate is fixed between the two side plates; a plurality of first sliding grooves which are evenly distributed are formed in the front end of the vertical plate, first sliding blocks are slidably connected into the first sliding grooves, first springs are fixed between the first sliding blocks and the inner walls of the first sliding grooves, the front ends of the first sliding blocks are connected with lower pressing plates, every two adjacent lower pressing plates are connected, impact blocks are movably connected to the bottoms of every two adjacent lower pressing plates, a third opening is formed in the front end of the lower pressing plate, and a driving mechanism is arranged on the workbench. According to the food package sealing detection equipment, the insertion rod is jacked up by the food packaging bag without leakage, so that the two electrode plates are in contact, the display lamp is lightened, and the insertion rod cannot be jacked up by the packaging bag with leakage, so that the detection efficiency of the device is effectively improved.

The invention belongs to the technical field of lithium ion batteries. A lithium ion battery with high energy density comprises a positive plate, a negative plate, a diaphragm and an electrolyte, the positive plate comprises a positive current collector and a positive composite material, and the positive composite material comprises a positive active material, a positive conductive agent and a binder; the positive electrode conductive agent comprises lithium iron phosphate coated with a carbon nano tube; and the positive active material has a shell-core structure, a shell layer is LiNi0. 5Mn1. 5O4 coated with graphene, a core layer is LiNixCoyMn1-x-yO2, x is greater than or equal to 0.1 and less than or equal to 0.9, y is greater than or equal to 0.05 and less than or equal to 0.9, x + y is greater than or equal to 0.1 and less than or equal to 0.95, the material of the shell layer accounts for 5-25% of the mass of the material of the core layer, and the mass of LiNi0. 5Mn1. 5O4 accounts for 90-95% of the total mass of the material of the shell layer. The lithium ion battery disclosed by the invention has relatively high energy density, electrochemical performance, rate capability and cycling stability.

The invention discloses a calcium fluoride coated lithium nickel manganate and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing the ammonium fluoride solution with a mixed solution of lithium nickel manganate and calcium nitrate; performing Water bath reaction at 60 to 90 degree centigrade for 5 to 10 hours, centrifuging, wahsing, drying, and calcining to obtain calcium fluoride coated lithium nickel manganate; The calcination temperature is 200 to 500 degree centigrade for 2 to 6 hours; In the calcium fluoride coated lithium nickel manganate, the mass ratio of calcium fluoride to lithium nickel manganate is 0.5% to 8%. The calcium fluoride coated lithium nickel manganate prepared by the method has uniform distribution and can remarkablyimprove the high-temperature cycling performance of the lithium nickel manganate material.

The invention discloses an intelligent robot sterilizer capable of rotating in all directions. The intelligent robot sterilizer comprises a bottom plate, a motor, a storage box, a water pump, a spraying device, a switch device and an operation panel, universal wheels are arranged at the bottom of the bottom plate, the motor is arranged on the inner wall of the bottom plate, a sliding way is formedin the top of the bottom plate, a protective shell is fixed to the top of a containing plate, a sliding block is arranged on the inner wall of the top of the sliding groove, a hinge is arranged on the right side of the bottom plate, a fixing plate is fixed to the inner wall of the protective shell, the spraying device is arranged on the outer wall of a water conveying pipe, and a sealing ring isfixed to the outer wall of the spraying device. The intelligent robot sterilizer capable of rotating in all directions is provided with a placement plate, guide wheels and the sliding way, so that thestability of the protective shell during rotation is improved, the phenomenon that the protective shell deviates is prevented, a user can conveniently drive the protective shell to rotate in all directions, the time spent by the user for rotating the protective shell is saved, and the working efficiency of the user is improved.

The invention discloses an operating scalpel with a grasping groove. The operating scalpel comprises an edge, a handle and a cover sleeve, wherein the edge is arranged on the front end of the handle,the cover sleeve is connected with the front end of the handle, the cover sleeve is the same as the edge in size, the cover sleeve consists of an upper panel, a front panel, a rear panel and a left panel, the lengths of the upper panel, the front panel and the rear panel are identical with the length of the edge, the height of the left panel is identical with that of the edge, the outside of the edge is coated with the cover sleeve, a hand groove is formed in the lower part of the middle end of the handle, the hand groove is 3cm-5cm long. The cover sleeve is additionally arranged outside the edge of the operating scalpel, the cover sleeve coats around the edge, so that the direct contact area of the edge and air can be reduced, and when a doctor is grasping the operating scalpel, the problem that the traditional handle has no place for the doctor to grasp to easily cause the slipping as the operating scalpel is made of steel can be solved.