43results about How to "Facilitates insertion and extraction" patented technology

A tilt adjustment assembly for a motorized reclining chair having a base frame adapted for rest on a floor surface. A seat and a back articulated support linkage are interconnected together for displacement of a seat and back of a reclining chair. An intermediate frame is mounted on the base frame through spring attachments, whereby to impart a rocking motion to the chair. A pair of foot rest linkages interconnect each of two of the said seat articulated support linkages to a foot rest plate. The tilt adjustment assembly comprises a motor-operated actuating rod secured at a free end to a sliding member to guidingly displace that member along a straight axis in a fixed plane and to any desired position along the axis. A pivotal link arm is pivotally secured at one end of the sliding member. A transverse linkage securing rod is secured to a second end of the pivotal link arm and extends transversely thereto. The transverse securing rod has opposed ends pivotally connected to an intermediate link arm of a respective one of the pair of foot rest linkages. Tensioning springs are secured to each of the pair of foot rest linkages for applying a restoring force to the foot rest to a retracted position.

The rotating cylinder comprises: an elongated inner core (12) which is substantially rigid and an interchangeable sleeve (45) which is fitted onto the core; the sleeve is axially and angularly constrained to said core and is provided on its external surface with a raised pattern. The internal surface of the interchangeable sleeve and the external surface of the inner core are conical surfaces which are mutually complementary; axial and angular locking of the interchangeable sleeve and the inner core is achieved by the friction between the conical surfaces which are forced axially one onto the other.

The invention relates to a sodium ion pre-embedded MoO3 nanobelt as well as a preparation method and application of the sodium ion pre-embedded MoO3 nanobelt. The sodium ion pre-embedded MoO3 nanobelt can be used as a positive electrode active material of a lithium ion battery. The preparation method comprises the following steps: (1) adding MoO3 nanobelt, PEG4000 and NaCl into deionized water, and stirring; (2) transferring the solution into a reaction kettle, carrying out hydrothermal reaction, taking out the solution, and cooling to the room temperature; and (3) after carrying out centrifugal separation on the obtained product, repeatedly washing the product with deionized water and ethanol, and finally drying the product in a drying box, so as to obtain the sodium ion pre-embedded MoO3 nanobelt. The preparation method has the beneficial effects that sodium ions are pre-embedded among layers, so that the substantial attenuation of the capacity in a primary cycle period is avoided, the electrochemical property of MoO3 is improved, the conductivity of the material is improved, furthermore, the cycling stability of the electrode material is effectively improved, and the electrode material can be used as a potential application material of the lithium ion battery, can meet the requirements of green chemistry and is beneficial to market promotion.

The invention discloses a fibrous hollow hard carbon material. The amorphous fibrous hollow hard carbon material with the d002 value within the range of 0.36-0.42 nm and the ID/IG within the range of1.5-2.0 is prepared by taking a fibrous biomass material as a raw material through a direct pyrolysis method. A preparation method thereof comprises the following steps of 1) carrying out pretreatmenton the raw material; and 2) carrying out high-temperature pyrolysis. According to the fibrous hollow hard carbon material, as a negative electrode active material in a sodium-ion secondary battery, the specific capacity of the fibrous hollow hard carbon material is 150-350 mAh/g, the fibrous hollow hard carbon material under 2 C can keep the capacity of 60% or above at 0.1C, and the capacity retention ratio can be kept within the range of 90-100% after 100 weeks of circulation. The fibrous hollow hard carbon material and the preparation method thereof have the advantages that 1, through a stable micron-scale fiber structure, the cycle life is prolonged; 2, a natural tubular hollow structure is utilized, so that the wettability of an electrolyte is improved, the ion transmission distance is shortened, and the dynamics performance of the battery is improved; and 3, the preparation method is simple, and the processing cost for preparing the special morphology is lowered. The fibrous hollow hard carbon material is a very potential negative electrode material of the sodium-ion battery and can be applied to the fields of intelligent power grids, secondary clean energy power generation and other large-scale energy storage systems or power batteries.

The invention relates to a CoO/reduced graphene oxide composite negative pole material and a preparation method thereof. The method includes: adding oleylamine and oleic acid into isopropanol solution to obtain A; adding a cobalt source and a precipitating agent into A, and well stirring to obtain B; adding graphene oxide into B, and well stirring to obtain C; subjecting C to ultrasonic treatment and oil bath reaction to generate a precipitate; separating out the precipitate, washing, drying, keeping the temperature for 0.5-2h in an atmosphere furnace at 300-500 DEG C, cooling to the room temperature to obtain the CoO/reduced graphene oxide composite negative pole material. The composite material is small in CoO particle size, lithium ion intercalation and deintercalation in a charging-discharging process are facilitated, and electrode specific capacity is increased; due to generation of dionaea muscipula shaped compound, maintaining of material stability is greatly facilitated, volume expansion of the material is decelerated, and electrochemical performances of the material are improved due to an auxiliary conductivity improving effect of carbon materials.

The invention belongs to the technical field of lithium ion battery electrode materials, and discloses a metal formate/carbon nano tube lithium ion battery cathode material and a preparing method thereof. The lithium ion battery cathode material is prepared from metal nitrate, formic acid, N,N-dimethylformamide and acidized carbon nano tubes, wherein the metal nitrate includes nickel nitrate, cobalt nitrate, zinc nitrate and manganous nitrate, the molar ratio of the metal nitrate to formic acid is 1:5-1:8, and the mass of the acidized carbon nano tubes accounts for 10-40% that of the metal nitrate. The preparing method adopts a solvothermal method, conductivity of the obtained metal formate/carbon nano tube lithium ion battery cathode material is remarkably improved by means of effective cladding of the carbon nano tubes, the material has high specific capacity and circulation stability, respective advantages of the carbon nano tubes and a metal-organic framework material can be brought into play, and the material is an ideal lithium ion battery cathode material. The preparing method is simple in preparation technology and convenient and easy to operate.

A mold fixture 20 for safe and efficient extraction, insertion and storage of mold inserts 26, 28 is provided. The mold fixture 20 includes a lower receiving area 24 for fixedly receiving a lower mold insert 28, an upper receiving area 22 for fixedly receiving an upper mold insert 26. The mold fixture 20 facilitates insertion or extraction of the upper and lower mold inserts 26, 28 into/from a molding machine 1 in a safe and secure manner. Furthermore, the upper and lower mold inserts 26, 28 can be securely stored within the mold fixture 20 at a storage location.

This invention provides a directional ion etching process for making nano-scaled angled features such as may be used, for example, in liquid crystal displays and or nanoimprinting templates. In a particular embodiment a semiconductor wafer substrate is prepared with at least one layer of material. A photoresist is applied, masked, exposed and developed. Anisotropic ion etching at a high angle relative to the wafer is performed to remove portions of the non protected material layer. The remaining photoresist caps shadow at least a portion of the material layer, and as the ion etching is performed at an angle, the protected portions of the material layer also appear at an angle.

The invention relates to a preparation method of a hard carbon material. The preparation method comprises the following steps: S100, pre-oxidizing a hard carbon precursor; s200, grinding the pre-oxidized hard carbon precursor into powder; s300, the powder is subjected to microwave treatment; and S400, calcining the powder obtained in S300 to obtain the hard carbon material. The hard carbon material is prepared by the preparation method. The hard carbon material prepared by the preparation method is applied to the negative electrode of the sodium-ion battery. The method has the advantages that the prepared hard carbon material serves as a sodium ion battery negative electrode material to be assembled into a sodium half-battery pair, within the voltage range of 0-2 V, the cycling stability is good, the initial reversible capacity reaches up to 370 mAh/g, the capacity retention rate reaches 95.9% after 50 cycles under the current density of 20 mA/g, compared with a traditional preparation method, the hard carbon specific capacity is obviously improved, and the method is simple and easy to implement. The method is low in cost and suitable for large-scale industrial production.

The invention provides a quaternary polycrystalline positive electrode material, and a preparation method and application thereof. The positive electrode material comprises a main body and a doping agent, the doping agent is uniformly doped into the main body, the chemical general formula of the main body is LiNixCoyMnzAl(1-x-y-z)O2, the doping agent comprises selenium oxide and calcium oxide, and Se/Ca is uniformly doped into the main body of the material, so the layered positive electrode material has characteristics of enhanced structure stability, reduced Li<+>/Ni<2+> cation mixing effect, inhibition of the oxidation process from O<2-> to O2, and obstruction of the phase change of the material from layering to spinel to a certain extent so as to improve the electrochemical performance of the positive electrode material.

The invention discloses a novel tin-based nanocrystalline alloy flexible film electrode and a preparation method thereof, and belongs to the technical field of preparation of tin-based alloy film electrodes. The preparation method is characterized by comprising the following steps of: preparing electroplating solution main salt soluble copper salt and soluble tin salt and a electroplating complexing agent into an electroplating solution A; adding additives to the electroplating solution A to obtain an electroplating solution B; continuing to add the electroplating solution main salt soluble copper salt and the soluble tin salt to the electroplating solution B to obtain an electroplating solution C; conducting surface-treatment on a current collector for electroplating; placing the electroplating solution C and the surface-treated current collector in a plating bath for electroplating to obtain the tin-based nanocrystalline alloy flexible film electrode; and rinsing and drying the tin-based nanocrystalline alloy flexible film electrode to obtain a copper-tin nanocrystalline alloy flexible film electrode. The novel tin-based nanocrystalline alloy flexible film electrode and the preparation method thereof effectively solve a problem that a tin-based active material is easily detached from the current collector during a charging and discharging process, and a preparation process issimple, operation is convenient, cost is low, and production efficiency is high.

The invention relates to the field of sodium ion secondary batteries, and provides a method for regulating and controlling a hard carbon structure based on transition metal manganese, which is used for a sodium ion battery negative electrode material. Cheap and easily available biomass is used as a carbon source, and manganese is ensured to be uniformly dispersed in a precursor polymer through coordination of manganese ions (Mn < 2 + >) and one-dimensional cellulose nanofibers and a coordination effect; according to the present invention, the graphene sheets are introduced into the graphene sheets, such that the conversion between the SP3 carbon and the SP2 carbon is effectively catalyzed so as to freely rearrange the graphene sheets, such that the expanded nano-graphite and the carbon micro-pores are formed, and the controllable adjustment of the carbon interlayer spacing and the micro-pores is achieved by adjusting the concentration; and finally, 92.05% of ultrahigh first efficiency and excellent circulating performance are obtained (the capacity retention ratio of 200 cycles is 95.80% under the current density of 20mA g <-1 >). The problems of low sodium ion first efficiency and poor cycling stability are solved through ion catalysis regulation and control, the first efficiency can be improved to 90% or above, the performance is improved by 30% or above, the energy density of the battery is greatly improved, and the total battery with sodium vanadium phosphate as the positive electrode has excellent electrochemical performance, has a good industrialization prospect and is suitable for industrial production. The method is very suitable for large-scale energy storage systems.

A mobile rack includes a fixed bracket, a tray, a movable element, and a guiding groove. The tray is capable of being slidingly extracted from or inserted into the fixed bracket, and an elastic element is disposed between the fixed bracket and the tray. In one embodiment, one end of the movable element is disposed at an inner side of the fixed bracket, and the other end has a protrusion. The guiding groove is disposed at an outer side of the tray facing to the protrusion and has a protrudent unit and a track surrounding the protrudent unit. The protrudent unit has a first guiding portion and a stopping portion. The protrusion is inserted into the track.

The invention relates to the technical field of secondary batteries, and discloses a positive electrode material for a lithium ion battery, a preparation method of the positive electrode material and the lithium ion battery. The positive electrode material comprises a high-nickel multi-element positive electrode material, the high-nickel multi-element positive electrode material is formed by agglomeration of a plurality of primary crystal grains, and the primary crystal grains are distributed in a divergent manner along the diameter direction of the high-nickel multi-element positive electrode material; wherein the length-diameter ratio L/R of the primary crystal grains in the positive electrode material is greater than or equal to 3, and the radial distribution proportion of the primary crystal grains in the positive electrode material is greater than or equal to 60%. The lithium ion battery containing the positive electrode material is high in capacity, the particle strength is greatly improved, and the battery capacity is high.

The invention relates to a preparation method of a nickel-cobalt-aluminum ternary positive electrode material precursor. The preparation method comprises the following steps: respectively preparing a nickel-cobalt binary solution, a sodium metaaluminate solution, a liquid alkali solution and a complexing agent solution, wherein the complexing agent is one or more of ammonium sulfite, ammonium bisulfite, ammonium sulfate, ammonium bisulfate, ammonium sulfide, ammonium hydrosulfide, diamine pentasulfide and ammonium thiosulfate; adding the base solution into the reaction kettle, introducing nitrogen, and controlling the temperature and the stirring rotating speed; adding the nickel-cobalt binary solution, the sodium metaaluminate solution, the liquid caustic soda solution and the complexing agent solution into a reaction kettle in a parallel flow manner for reaction; when the particle D50 generated by the reaction reaches 3.0-18.0 [mu]m, stopping feeding; performing aging, washing and impurity removal, dehydration, drying, batch mixing, screening and iron removal on the obtained material, and performing packaging to obtain a finished product. In the process of synthesizing the nickel-cobalt-aluminum ternary precursor, the variety and the adding amount of the added complexing agent are adjusted, and the problems that pores in the precursor are few and are irregularly distributed are solved.