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High-circulation and high-magnification rate carbon-based negative electrode energy storage composite material and preparation method thereof

A composite material and high-magnification technology, applied in the field of materials science, can solve problems such as capacity attenuation and volume expansion, and achieve the effects of preventing agglomeration, inhibiting volume change, and increasing the contact area

Inactive Publication Date: 2018-12-21
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the current battery anode materials have technical problems such as volume expansion and capacity fading during charge and discharge.

Method used

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  • High-circulation and high-magnification rate carbon-based negative electrode energy storage composite material and preparation method thereof
  • High-circulation and high-magnification rate carbon-based negative electrode energy storage composite material and preparation method thereof
  • High-circulation and high-magnification rate carbon-based negative electrode energy storage composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A high-cycle, high-rate carbon-based negative electrode energy storage composite material is prepared by a method comprising the following steps:

[0068] (1), preparation of nickel hydrogel

[0069] Put 1g of polymer water-absorbent resin into the reaction vessel, then add 20ml of nickel salt solution, control the temperature at 45°C and shake in a constant temperature water bath for 8 hours to obtain nickel salt gel;

[0070] Described nickel salt aqueous solution, the nickel acetate aqueous solution that is about to join the nickel acetate crystal to obtain in distilled water is the nickel acetate aqueous solution of 0.025g / ml;

[0071] The amount of polymer resin and nickel salt solution is calculated by mass ratio, polymer resin: nickel acetate in nickel salt solution is 1:0.5;

[0072] The polymer water-absorbing resin is sodium polyacrylate;

[0073] (2), preparation of xerogel precursor

[0074] Move the nickel hydrogel obtained in step (1) into a refrigerato...

Embodiment 2

[0086] A high-cycle, high-rate carbon-based negative electrode energy storage composite material is prepared from three main elements, Ni, C, and O, by a method comprising the following steps:

[0087] (1), preparation of nickel hydrogel

[0088] Put 1g of polymer water-absorbent resin into the reaction vessel, then add 20ml of nickel salt solution, control the temperature at 45°C and shake in a constant temperature water bath for 8 hours to obtain nickel salt gel;

[0089] Described nickel salt aqueous solution, the nickel acetate aqueous solution that is about to join the nickel acetate crystal to obtain in distilled water is the nickel acetate aqueous solution of 0.025g / ml;

[0090] The amount of polymer resin and nickel salt solution is calculated by mass ratio, polymer resin: nickel acetate in nickel salt solution is 1:0.5;

[0091] The polymer water-absorbing resin is sodium polyacrylate;

[0092] (2), preparation of xerogel precursor

[0093] Move the nickel hydrogel...

Embodiment 3

[0102] A high-cycle, high-rate carbon-based negative electrode energy storage composite material is prepared from three main elements, Ni, C, and O, by a method comprising the following steps:

[0103] (1), preparation of nickel hydrogel

[0104] Put 1g of polymer water-absorbent resin into the reaction vessel, then add 20ml of nickel salt solution, control the temperature at 45°C and shake in a constant temperature water bath for 8 hours to obtain nickel salt gel;

[0105] Described nickel salt aqueous solution, the nickel acetate aqueous solution that is about to join the nickel acetate crystal to obtain in distilled water is the nickel acetate aqueous solution of 0.025g / ml;

[0106] The amount of polymer resin and nickel salt solution is calculated by mass ratio, polymer resin: nickel acetate in nickel salt solution is 1:0.5;

[0107] The polymer water-absorbing resin is sodium polyacrylate;

[0108] (2), preparation of xerogel precursor

[0109] Move the nickel hydrogel...

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Abstract

The invention discloses a carbon-based negative electrode energy storage composite material with high circulation and high magnification rate and a preparation method thereof. A method comprises preparing a nickel salt water gel and a nickel salt water gel precursor, then calcining, grinding, pickling and vacuum drying the nickel salt water gel precursor under the protection of inert gas, oxidizing the calcined product after pickling at high temperature and naturally cooling the same to room temperature, so as to obtain the carbon-based anode energy storage composite material with high circulation and high magnification rate which has high cycle stability, excellent charge-discharge specific capacity and good rate performance. The preparation method is simple, the cost is low and the performance is excellent, the method is suitable for the production of large-scale commercial batteries.

Description

technical field [0001] The invention relates to a battery material, in particular to a high-cycle, high-rate carbon-based negative electrode energy storage composite material and a preparation method thereof, belonging to the field of materials science. Background technique [0002] Super Absorbent Polymer (SAP) is a new type of functional polymer water-absorbing material. It has a high water absorption function of absorbing water hundreds to thousands of times heavier than itself, and has excellent water retention performance. Once it absorbs water and swells into a hydrogel, it is difficult to separate the water even if it is pressurized. Therefore, it is widely used in various fields such as personal hygiene products, industrial and agricultural production, and civil engineering. Superabsorbent resin is a kind of macromolecule containing hydrophilic groups and cross-linked structure. It was first prepared by Fanta et al. by grafting polyacrylonitrile with starch and then...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/587H01M10/0525H01M10/054B82Y30/00
CPCB82Y30/00H01M4/364H01M4/523H01M4/587H01M10/0525H01M10/054Y02E60/10
Inventor 闵宇霖卫欢欢范金辰徐群杰时鹏辉杜金成
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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