40results about How to "Improve power storage performance" patented technology

Provided is a method for manufacturing a power storage device in which a crystalline silicon layer including a whisker-like crystalline silicon region is formed as an active material layer over a current collector by a low-pressure CVD method in which heating is performed using a deposition gas containing silicon. The power storage device includes the current collector, a mixed layer formed over the current collector, and the crystalline silicon layer functioning as the active material layer formed over the mixed layer. The crystalline silicon layer includes a crystalline silicon region and a whisker-like crystalline silicon region including a plurality of protrusions which project over the crystalline silicon region. With the protrusions, the surface area of the crystalline silicon layer functioning as the active material layer can be increased.

The invention discloses a polypyrrole minitype super capacitor in the range of the capacitor manufacturing technology based on MEMS technology and the preparation method thereof. The polypyrrole minitype super capacitor adopts the structure that a metal comb two-dimensional plane structure as a current collector is prepared on the surface of the silicon matrix by utilizing the micro-machining technology; a comb-shaped polypyrrole active electrode is prepared on the surface of the current collector by adopting the method of polypyrrole substance being prepared by the electric precipitation method; a layer of gel solid electrolyte is covered on the surface of the comb-shaped polypyrrole electrode and between a positive electrode and a negative electrode; and a layer of polyimide material is covered on the surface of the structure to accomplish the encapsulation of the minitype super capacitor. The MEMS-based manufacturing technology has the characteristic that the process is simple, and is suitable for mass manufacture. The minitype super capacitor has the advantages of small volume, high energy storage and stable performance, and is widely applicable to micro-robot electronic intelligence systems, chemical sensors, battlefield friend-or-foe identification devices, distributed type battlefield sensors and other fields.

It is an object to improve performance of a power storage device, such as cycle characteristics. A power storage device includes a current collector and a crystalline semiconductor layer including a whisker, which is formed on and in close contact with the current collector. Separation of the crystalline semiconductor layer is suppressed by an increase of adhesion, whereby cycle characteristics in which a specific capacity of a tenth cycle number with respect to a first cycle number is greater than or equal to 90% is realized. In addition, cycle characteristics in which a specific capacity of a hundredth cycle number with respect to a first cycle number is greater than or equal to 70% is realized.

The invention discloses a micro supercapacitor applied to a micro system and a preparation method thereof, which belong to the manufacturing technology range of miniature supercapacitors. The preparation method comprises the following steps: drawing graphs of a micro capacitor and an array thereof on a silicon substrate through a mask and a photoetching method; preparing a layer of a metal film current collector and a layer of a ruthenium-oxide film cathode layer on the silicon substrate; spin-coating a layer of a polyimide sacrifice layer on the layers to obtain a required support body structure and a peripheral liquid storage cavity enclosure structure; spin-coating the sacrifice layer on the layers again and depositing an anode ruthenium-oxide active substance layer and a nickel film current collector layers in turn on the layers; perforating filling holes on the upper nickel layer and an oxide layer to fill an electrolyte in a cavity; and finally, covering a polymer film layer on the whole micro supercapacitor array again to finish an encapsulation process. The micro supercapacitor is provided with the unique support body structure and the liquid storage cavity structure, has the characteristics of small volume, large energy storage density, high discharge power, monolithic and the like, can be manufactured in batches, and has wide application prospect.

The invention discloses a preparation method of a lithium ion battery and a supercapacitor electrode material. The preparation method comprises following steps: 1, two dimensional metal oxides and sulfides, and oxidized graphene are weighed at a certain mass ratio and are mixed to be uniform; 2, an obtained mixture is subjected to ball millilng so as to obtain a composite material formed via ordered stacking of metal oxides and sulfides/graphene, wherein the mass ratio of the metal oxides and sulfides to graphene is controlled to be x:1, 1<=x<=14, and the metal oxides and sulfides are MoS2, MoO3, V2O5, or VS2. According to the preparation method, in ball milling processing, oxidized graphene is reduced gradually, and peeling is realized gradually; peeling of the two dimensional metal oxides and sulfides is realized gradually; assembling of the oxidized graphene with the two dimensional metal oxides and sulfides is realized, so that transmission capability of charges in the two mediumsis increased, electrode material rate capability is improved; the existing of graphene is capable of increasing material flexibility, improving the volume effect resistance of the supercapacitor electrode material in charge and discharge process, and increasing electrode material cycling stability.

The invention provides a temperature measuring device on a motion device. The temperature measuring device comprises a generating device and a temperature collecting device. The generating device comprises a generator producing an induced current, a rectification filtering circuit and a voltage stabilizing circuit, and therefore the kinetic energy of the motion of the motion device is converted into electric energy, and the stable voltage is obtained. A temperature sensor in the temperature collecting device is arranged at the position to be measured and transmits collected temperature signals to a controller to be converted to be output. According to the scheme, the kinetic energy of the motion device is converted into the electric energy through the design of the generating device, resources are saved, and the problems that in the prior art, the service life of a temperature measuring device of a vibration tank is short, the interior temperature of the materials cannot be truly reflected, interference is prone to being caused, and a power source is difficult to arrange are solved. The temperature measuring device has the advantages of being long in transmission distance, short in response time, high in anti-interference capability, stable and protection level, easy to design and low in power consumption and cost.

The invention provides a heat dissipation type nickel-metal hydride battery. A main body is a cylindrical nickel-metal hydride battery and is formed by arranging a roll core in a casing. The heat dissipation type nickel-metal hydride battery further comprises a heat dissipation rod, and the heat dissipation rod is a cylinder with the same height as the nickel-metal hydride battery and is filled with condensed fluid. The roll core is formed by parallel connection of a plurality of sub roll cores, and the sub roll cores respectively surround the heat dissipation rod. The heat dissipation type nickel-metal hydride battery is simple in structure, the heat dissipation rod is added on the basis of a traditional nickel-metal hydride battery, the sub roll cores in parallel connection are arranged around the heat dissipation rod, the problem that the nickel-metal hydride battery generates excessive heat in the using process can be effectively solved; and the nickel-metal hydride battery is good in electric storage performance and high in use efficiency. A heat dissipation device comprises cooling fins and an isolation casing; the cooling fins are a plurality of independent heat conduction blocks and are good in heat conduction effect; and the isolation casing has the effect of electric leakage resistance and avoids the short circuit caused by the contact between the roll core and the cooling fins.

The invention relates to a flexible lithium-sulfur battery positive electrode material, and a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving elemental sulfur in an organic solvent to obtain a sulfur solution; S2, adding a carrier carbon material into the sulfur solution, uniformly mixing, and then removing the organic solvent to obtain a sulfur-carbon compound; and S3, dispersing the sulfur-carbon compound in a poor solvent of sulfur, adding a skeleton carbon material, uniformly mixing, and removing the poor solvent to obtain the flexible lithium-sulfur battery positive electrode material. The preparation method provided by the invention is simple in process, cheap and easily available in raw materials and convenient to operate; and the prepared flexible lithium-sulfur battery positive electrode material has excellent conductivity and electricity storage performance.

The invention discloses a preparation method of a spatial network-like Fe2O3 composite material electrode. The method comprises the following steps of: a, cleaning an iron sheet; b, preparing sol-gel acidic solution; and c, preparing the composite electrode. Compared with the prior art, the preparation method has the advantages of high repeatability, easiness and convenience in operation, low energy consumption, ultra-high electric capacity of 688 F/g, quick charging and discharging under large current density, low cost and suitability for industrial large-scale preparation; and the prepared 3D (Three Dimensional) burr-shaped Fe2O3 has uniform shape, uniformly covers the surface of an iron electrode, has a large specific surface area and can be fully contacted with electrolyte solution as a capacitor material so as to realize quick and efficient charging and discharging.

The invention discloses a preparation method of a composite material, the composite material and a super-capacitor, and belongs to the technical field of nano materials. The preparation method of thecomposite material comprises the following steps: preparing a titanium dioxide nanorod array; dissolving aniline in first hydrochloric acid solution to form first solution, dissolving ammonium persulfate in second hydrochloric acid solution to form second solution, mixing the first solution with the second solution, and performing violent shaking for 20-40s to obtain mixed solution; putting the titanium dioxide nanorod array into the mixed solution for reacting for 1-3 hours to obtain a titanium dioxide nanorod array; performing washing to obtain the titanium dioxide and polyaniline nano composite material. The preparation method of the composite material is simple in preparation process, low in manufacturing cost and good in repeatability.

The invention discloses an energy-stored photovoltaic battery and a manufacturing method thereof. The energy-stored photovoltaic battery is sequentially provided with a positive electrode layer (2), a first electrolyte layer (3), a diaphragm (4), a second electrolyte layer (5) and a negative electrode layer (6) from a conductive surface of a top conductive glass substrate (1) to a conductive surface of a bottom conductive glass substrate (7). The positive electrode layer (2) is composed of carbon-rich TiO2 generated uniformly in situ. Compared with a common solar battery only used as a solar photoelectric converter, the energy-stored photovoltaic battery realizes that photoelectric conversion and electric energy storage are combined in the solar battery without accessories, thickness of the battery is greatly reduced, and development of simplification and ultra-thinning of the solar battery is facilitated.

The invention discloses an ion induction patch with long lasting period. The ion induction patch comprises a backing layer, an adhesive layer, an ion accumulation layer, a surface covering layer and astripping layer, wherein the adhesive layer is arranged between the backing layer and the ion accumulation layer, the ion accumulation layer is arranged at the middle of the adhesive layer, the surface covering layer is arranged between the ion accumulation layer and the stripping layer, and the stripping layer is the outermost layer. The surface covering layer is a metal foil sprayed with an anti-radiation coating layer, and a base material of the ion accumulation layer is prepared by modifying polyimide. The design is reasonable, high specific surface voltage can be obtained, micro-currentcan be generated, charges are stably stored in the product, the lasting period of the product can be prolonged to the maximum extent, and the treatment effect on lumbar vertebra and cervical vertebrapain is improved.