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Ternary composite electrode material for hybrid capacitor and application of material

A hybrid capacitor and ternary composite technology, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, nickel compounds, etc. Improve the specific capacity, improve the conductivity, the effect of uniform distribution

Active Publication Date: 2020-12-11
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current main ternary material is LiNi 1-x-y co x mn y o 2 , but the discharge potential of nickel is low and the conductivity is poor; the price of cobalt is relatively high and the practicability is poor; the high manganese damages the layered structure of the material and reduces the specific capacity; in order to improve the above shortcomings, nickel, vanadium and manganese metal oxides are used To prepare the ternary electrode material, first V 2 o 5 It has a layered structure that is easy to deintercalate lithium ions, and is suitable for the storage of lithium ions; in addition, compared with cobalt, vanadium is cheap and has abundant reserves, and has the characteristics of high specific capacity, etc., and is favored as a cathode material for lithium-ion batteries

Method used

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  • Ternary composite electrode material for hybrid capacitor and application of material

Examples

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Embodiment 1

[0034]According to ammonium metavanadate, nickel acetate, manganese acetate molar ratio is 8:0.5:0.5 and takes raw material; First add nickel acetate, manganese acetate in 450mL deionized water and be mixed with the acetic acid that nickel acetate and manganese acetate concentration are 0.02mol / L Nickel-manganese acetate mixed solution; then add sodium carbonate to prepare 0.2mol / L sodium carbonate solution in 450mL deionized water, and add 0.8mL of ammoniacal liquor with a mass concentration of 5%, and obtain sodium carbonate-ammonia mixed solution after mixing; Add the prepared sodium carbonate-ammonia water mixed solution dropwise into the nickel acetate-manganese acetate mixed solution through a peristaltic pump at a rate of 50mL / min, stir evenly and let it stand, discard the supernatant, and centrifuge to retain the precipitate; Put the precipitate obtained by centrifugation into a container, dry it at 100°C for 20 hours, add ammonium metavanadate and 5mL distilled water a...

Embodiment 2

[0039] According to ammonium metavanadate, nickel acetate, manganese acetate molar ratio is 8:0.25:0.25 and weighs raw material, first adds nickel acetate, manganese acetate in 450mL deionized water and is mixed with nickel acetate and manganese acetate concentration and is 0.04mol / L Nickel acetate-manganese acetate mixed solution; then add sodium carbonate to prepare 0.1mol / L sodium carbonate solution in 450mL deionized water and add 0.7mL ammonia water, mix well to obtain sodium carbonate-ammonia water mixed solution, then sodium carbonate-ammonia water mixed solution Add it all dropwise into 450mL of nickel acetate-manganese acetate mixed solution at a speed of 50mL / min through a peristaltic pump, stir evenly and let it stand, discard the supernatant, centrifuge, and retain the precipitate; put the precipitate obtained by centrifugation into Put it into the container, dry at 80°C for 20 hours, add ammonium metavanadate and 5mL distilled water after grinding; then put the mat...

Embodiment 3

[0043] According to the ammonium metavanadate, nickel acetate, manganese acetate molar ratio is 8:1:1, first add nickel acetate, manganese acetate in 450mL deionized water to prepare nickel acetate and manganese acetate concentration of 0.04mol / L acetic acid Nickel-manganese acetate mixed solution; then add sodium carbonate to prepare 0.2mol / L sodium carbonate solution in 450mL deionized water and add 0.5mL ammonia water, mix well to obtain sodium carbonate-ammonia water mixed solution, then sodium carbonate-ammonia water mixed solution passes Add the peristaltic pump dropwise into 450mL of nickel acetate-manganese acetate mixed solution at a speed of 50mL / min, stir evenly and let it stand, discard the supernatant, and centrifuge to keep the precipitate; put the precipitate obtained by centrifugation into Put it into a container, dry it at 120°C for 15 hours, add ammonium metavanadate and 5mL of distilled water after grinding; then put the material into an ultrasonic machine wi...

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Abstract

The invention discloses a ternary composite electrode material for a hybrid capacitor and application of the material. The ternary composite electrode material is NixVyMnZO2, and a preparation methodof the material comprises the following steps: preparing a nickel acetate-manganese acetate mixed solution and a sodium carbonate-ammonia water mixed solution, dropwise adding the sodium carbonate-ammonia water mixed solution into the nickel acetate-manganese acetate mixed solution, uniformly conducting stirring, conducting standing, discarding the supernatant, conducting centrifugal treating, retaining precipitates, conducting drying and grinding, adding ammonium metavanadate and distilled water, conducting ultrasonic treating at room temperature, conducting quick freeze-drying in liquid nitrogen, conducting grinding again, conducting sintering in a muffle furnace at high temperature, conducting cooling along with the furnace, and conducting grinding and sieving to obtain a product. The preparation method is simple and convenient in condition, easy to control and reasonable in process, vanadium, nickel and manganese oxides are fully dispersed into a system, and the storage of lithiumions is enhanced, so that the electrode performance is improved.

Description

technical field [0001] The invention relates to a ternary composite electrode material for a hybrid capacitor and its application. Background technique [0002] In recent years, with the increasing market demand for new energy vehicles and large-scale energy storage devices, the development of energy storage devices with both high power and high energy density is particularly urgent. As the most widely used energy storage device at present, lithium-ion batteries have high specific energy density, but their specific power density is often low. In addition, the service life of lithium-ion batteries will be greatly shortened under high-current charging and discharging conditions. In comparison, supercapacitors have high power density and long cycle life, but their energy density is low. Lithium-ion hybrid capacitors have become a research hotspot in current energy storage systems because they have the advantages of both lithium-ion batteries and supercapacitors, that is, high...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01G11/46H01G11/50H01G11/86
CPCC01G53/006H01G11/46H01G11/50H01G11/86C01P2004/03C01P2006/40Y02E60/13
Inventor 蔡克迪严爽郎笑石刘凡李兰奚雪姚传刚
Owner BOHAI UNIV
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