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Novel negative electrode material for lithium-ion/potassium-ion battery and preparation method thereof

A battery negative electrode and lithium ion technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems that it is difficult for inorganic materials to store lithium ions and potassium ions, and it is difficult to realize the application of electrode materials, and achieve excellent cycle stability , low cost and convenient production

Active Publication Date: 2018-07-06
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Whether it is a lithium-ion battery or a potassium-ion battery, the negative electrode materials are mostly inorganic materials such as artificial graphite and modified natural graphite. It is difficult for inorganic materials to have the ability to store lithium ions and potassium ions at the same time. Application in two or more battery systems

Method used

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  • Novel negative electrode material for lithium-ion/potassium-ion battery and preparation method thereof
  • Novel negative electrode material for lithium-ion/potassium-ion battery and preparation method thereof
  • Novel negative electrode material for lithium-ion/potassium-ion battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A novel lithium-ion / potassium-ion battery negative electrode material, the preparation method of which comprises the following steps:

[0031] (1) Weigh 2g of terephthalic acid and 1g of super P, mix the two, put them into a ball mill jar, add 20mL of distilled water, mill at a speed of 400r / min for 4h, take out the ball mill, and bake at 120°C for 24h ;

[0032] (2) Weigh 225 mg of the product of step (1), put it into an agate mortar, add 1 mL of LA132 binder with a concentration of 25 mg / mL, and grind for 30 min to obtain a slurry;

[0033] (3) Coating the slurry obtained in step (2) evenly on the copper foil, drying at 60° C., and then punching holes with a puncher with a diameter of 10 mm to prepare terephthalic acid electrode sheets.

Embodiment 2

[0035] A novel lithium-ion / potassium-ion battery negative electrode material, the preparation method of which comprises the following steps:

[0036] (1) Weigh 2g of terephthalic acid and 0.8g of conductive carbon black, mix the two, put them into a ball mill jar, add 20mL of distilled water, and ball mill at a speed of 400r / min for 4h, take out the ball mill material, Bake for 24 hours;

[0037] (2) Weigh 225 mg of the product of step (1), put it into an agate mortar, add 2 mL of LA132 binder with a concentration of 25 mg / mL, and grind for 30 min to obtain a slurry;

[0038] (3) Coating the slurry obtained in step (2) evenly on the copper foil, drying at 60° C., and then punching holes with a puncher with a diameter of 10 mm to prepare terephthalic acid electrode sheets.

Embodiment 3

[0040] A novel lithium-ion / potassium-ion battery negative electrode material, the preparation method of which comprises the following steps:

[0041] (1) Weigh 5g of terephthalic acid and 2g of super P, mix the two, put them into a ball mill jar, add 40mL of distilled water, mill at a speed of 400r / min for 4h, take out the ball mill, and bake at 120°C for 24h ;

[0042] (2) Weigh 225 mg of the product of step (1), put it into an agate mortar, add 1 mL of LA132 binder with a concentration of 25 mg / mL, and grind for 30 min to obtain a slurry;

[0043] (3) Coating the slurry obtained in step (2) evenly on the copper foil, drying at 60° C., and then punching holes with a puncher with a diameter of 10 mm to prepare terephthalic acid electrode sheets.

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Abstract

The invention provides a novel negative electrode material for a lithium-ion / potassium-ion battery and a preparation method thereof. The preparation method comprises the following steps of mixing terephthalic acid with conductive carbon additive, then adding distilled water, next, carrying out ball milling, and afterwards, drying; mixing a dried matter with a binder, and grinding, so as to obtainslurry; coating the obtained slurry on a matrix, and drying, so as to obtain the novel negative electrode material. The preparation method uses the terephthalic acid for preparing a negative electrodematerial for a battery; the obtained negative electrode material can be simultaneously used for the lithium-ion battery and the potassium-ion battery, so as to realize that one electrode material canbe simultaneously applied to two or more than two battery systems; the preparation method adopts the terephthalic acid as an important component of the negative electrode material; the terephthalic acid is jointly compounded with conductive carbon black and the binder, and the obtained negative electrode material, in the constant-electric-current charge and discharge processes of the lithium-ionbattery and the potassium-ion battery, can be used for improving the specific capacities of the lithium-ion battery and the potassium-ion battery, and meanwhile, has excellent cyclical stability.

Description

technical field [0001] The invention belongs to the technical field of battery negative electrode materials and preparation methods, and in particular relates to a novel negative electrode material for lithium ion / potassium ion batteries and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used in various portable electronic products, pure electric vehicles and hybrid vehicles due to their advantages such as high energy density, high working voltage, long cycle life and low self-discharge rate. However, with the development of science and technology, people have higher and higher requirements for lithium-ion batteries, and improving battery performance has become an urgent and common requirement. [0003] The working principle of potassium-ion batteries is similar to that of lithium-ion batteries. Compared with lithium resources in lithium-ion batteries, potassium resources have the natural advantages of being widely distribu...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M10/0525H01M10/054
CPCH01M4/60H01M10/0525H01M10/054H01M2004/027Y02E60/10
Inventor 樊聪王川姚泽祎唐武
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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