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Organic material/graphene composite negative electrode, preparation method thereof and lithium ion battery

An organic matter and negative electrode technology, applied in the direction of graphite, battery electrodes, secondary batteries, etc., can solve the problems of poor electronic conductivity and large quantities, and achieve the effects of improving conductivity, reducing volume effect, and rich sources

Inactive Publication Date: 2019-10-11
SUZHOU UNIV
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  • Abstract
  • Description
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Problems solved by technology

However, its electronic conductivity is poor, often requiring a large amount of electronically conductive materials

Method used

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  • Organic material/graphene composite negative electrode, preparation method thereof and lithium ion battery
  • Organic material/graphene composite negative electrode, preparation method thereof and lithium ion battery
  • Organic material/graphene composite negative electrode, preparation method thereof and lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1～24

[0028] Examples 1-24: Preparation of organic material / graphite composite electrodes

[0029] This embodiment provides an organic material / graphite composite electrode material for making a negative electrode of a lithium battery. The specific steps are:

[0030] (a) According to the formula shown in Table 1, fully mix the organic lithium storage material, graphite, conductive agent, binder, and dispersant in deionized water (commercially available) to make an electrode slurry;

[0031] (b) Coat the electrode slurry on the copper foil current collector (commercially available), and use 2MPa / cm after drying 2 The pressure was pressed, cut and dried at 120° C. under vacuum for 16 hours to obtain the composite electrode.

[0032] Table 1 Formula ratio table and first reversible capacity of high-capacity organic / graphite composite negative electrodes in Examples 1-24

[0033]

[0034]

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Abstract

The invention discloses an organic material / graphene composite negative electrode. The composite negative electrode is formed by preparation of an organic material, a graphite carbon material and an auxiliary material, wherein the organic material is a mixture selected from one or more of organic acid / anhydride with a conjugate carbonyl structure. The invention also provides a preparation method of the composite negative electrode and a lithium ion battery manufactured by the composite negative electrode. The organic material / graphene composite negative electrode has the characteristics of high capacity, high power and long service lifetime and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an organic material / graphite composite negative electrode with high capacity, high power and long life, a preparation method thereof and a lithium ion battery manufactured with the composite negative electrode. Background technique [0002] The development of high-capacity and high-performance anode materials is an important way to improve the performance of lithium-ion batteries and enhance battery cycle stability and safety. As an important negative electrode material for commercial lithium-ion batteries, graphite has many advantages, such as high electronic conductivity, low lithium intercalation and extraction potential, low cost, and relatively little harm to the environment. However, with the widespread application of lithium-ion batteries in electric vehicles and large-scale energy storage technologies, the exposure of graphite anodes has become increasingly prom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/60H01M10/0525C01B32/20
CPCC01B32/20H01M4/362H01M4/583H01M4/60H01M4/625H01M10/0525Y02E60/10
Inventor 郑洪河王艳
Owner SUZHOU UNIV
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