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Novel high-voltage lithium ion battery based on silicon anode and energy storage element

A lithium-ion battery, silicon anode technology, applied in the field of electrochemistry, can solve problems such as inability to meet, and achieve the effects of high safety, high structural stability, and high specific energy

Inactive Publication Date: 2017-09-29
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of negative electrode material has a good charge-discharge platform and structural stability, but its actual discharge specific capacity (about 330mAh / g) is close to its theoretical value (372mAh / g), which cannot meet the needs of the new generation of lithium-ion batteries.

Method used

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  • Novel high-voltage lithium ion battery based on silicon anode and energy storage element

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Experimental program
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Effect test

Embodiment 1

[0026] Example 1: LiCoPO 4 Assembly of cathode-silicon / carbon anode full battery and its electrochemical performance test

[0027] (1) Preparation of positive electrode

[0028] By LiCoPO 4 : carbon black: binder = (7.5): (2): (0.5) ratio (mass ratio) mixed, after mixing evenly, be coated on the aluminum current collector, after vacuum drying, sectioning, obtain positive electrode sheet .

[0029] (2) Preparation of negative electrode

[0030] Mix according to the ratio (mass ratio) of silicon / carbon composite: carbon black: binder (sodium alginate) = (7.5): (2): (0.5), after mixing evenly, coat on the copper current collector, After blow drying and slicing, the negative electrode sheet is obtained.

[0031] (3) Assembly of full battery

[0032] Insert polypropylene microporous membrane Celgard2300 (U.S. Celgard Diaphragm Co., Ltd.) between the positive and negative electrodes as a diaphragm, add carbonate electrolyte [1M LiPF 6 (Lithium hexafluorophosphate) in DMC (dim...

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Abstract

The invention discloses a novel high-voltage lithium ion battery based on a silicon anode and an energy storage element. The lithium ion battery comprises a cathode, an anode and an electrolyte, wherein positive active materials are selected from lithium cobaltous phosphate and a compound thereof; and negative active materials are selected from silicon-based materials. The lithium ion battery provided by the invention has the characteristics of high voltage, high safety and high specific energy.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a novel high-voltage lithium-ion battery and an energy storage element based on a silicon negative electrode. Background technique [0002] In the 21st century, human beings must face two serious problems of energy and environment, so the development of new energy and renewable clean energy has far-reaching significance. Electric vehicles use electric energy instead of fossil fuels such as petroleum as power, and have the advantages of energy saving and environmental protection, and have attracted global attention. Among the research hotspots related to electric vehicles, battery technology is regarded as the main difficulty. However, the current power ion battery system still has many problems to be solved in terms of specific energy, specific power, service life and cost. Therefore, it is necessary and urgent to develop and design power lithium-ion batteries with g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/136H01M4/134
CPCH01M4/134H01M4/136H01M10/0525Y02E60/10
Inventor 陈龙李海君栗欢欢王亚平徐如玉江浩斌
Owner JIANGSU UNIV