Composite conductive agent for lithium ion battery, composite conductive liquid for lithium ion battery, preparation method of conductive agent and conductive liquid and lithium ion battery

A lithium-ion battery and composite conductive agent technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of battery cycle performance degradation and electrode material easy to change, and achieve reduced battery interface impedance and excellent cycle stability performance, and the effect of improving high-temperature cycle performance

Active Publication Date: 2016-11-09
LUOYANG LIRONG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the lithium-ion battery improves high-temperature performance by using the above-mentioned electrolyte, the electrolyte has little influence on the structure of the electrode material on the battery pole piece. During the charge-discharge cycle of the battery in a high-temperature environment, the electrode The material is still prone to change, which can lead to poor cycle performance of the battery

Method used

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  • Composite conductive agent for lithium ion battery, composite conductive liquid for lithium ion battery, preparation method of conductive agent and conductive liquid and lithium ion battery
  • Composite conductive agent for lithium ion battery, composite conductive liquid for lithium ion battery, preparation method of conductive agent and conductive liquid and lithium ion battery
  • Composite conductive agent for lithium ion battery, composite conductive liquid for lithium ion battery, preparation method of conductive agent and conductive liquid and lithium ion battery

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Experimental program
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Effect test

Embodiment 1

[0040] The composite conductive agent for lithium ion of the present embodiment is made up of the following components by weight: 1.0g of 3-trimethyl-silane borate, 1.0g of film-forming agent, 3.0g of conductive agent, 9g of composite bonding agent Agent; Wherein, the film-forming agent is lithium perfluorosulfonate, the conductive agent is aminated graphene, and the composite binder is mixed with sodium alginate of 4.0g and sodium alginate of 4.0g.

[0041] The composite conductive liquid for lithium ion of the present embodiment is made up of the following components by weight: 1.0g of 3-trimethyl-silane borate, 1.0g of film-forming agent, 3.0g of conductive agent, 9g of composite bonding agent agent and 100g of solvent; wherein, the film-forming agent is lithium perfluorosulfonate, the conductive agent is aminated graphene, and the composite binder is composed of 4.0g of sodium carboxymethyl cellulose and 5.0g of sodium alginate, The solvent is N-methylpyrrolidone.

[0042...

Embodiment 2

[0048] The composite conductive agent for lithium ion of the present embodiment is made up of the following components by weight: 0.5g of 3-trimethyl-silane borate, 0.5g of film-forming agent, 1.0g of conductive agent, 5g of composite bonding agent agent; wherein, the film-forming agent is NaBF 4 , the conductive agent is aminated carbon nanotubes, and the composite binder is composed of 2.0 g of sodium carboxymethyl cellulose and 3.0 g of sodium alginate.

[0049] The composite conductive liquid for lithium ion of the present embodiment is made up of the following components by weight: 0.5g of 3-trimethyl-silane borate, 0.5g of film-forming agent, 1.0g of conductive agent, 5g of composite bonding agent agent and 100g of solvent; wherein, the film-forming agent is NaBF 4 , the conductive agent is aminated carbon nanotubes, the composite binder is composed of 2.0 g of sodium carboxymethyl cellulose and 3.0 g of sodium alginate, and the solvent is mixed with butyl acetate and e...

Embodiment 3

[0056] The composite conductive agent for lithium ions in this embodiment is composed of the following components by weight: 2.0g of 3-trimethyl-silane borate, 2.0g of film-forming agent, 5.0g of conductive agent, 15.0g of composite adhesive Binding agent; Wherein, film-forming agent is NaBF 4 , the conductive agent is aminated graphene, and the composite binder is composed of 6.0 g of sodium carboxymethyl cellulose and 9.0 g of sodium alginate.

[0057] The composite conductive liquid for lithium ions in this embodiment is composed of the following components by weight: 2.0g of 3-trimethyl-silane borate, 2.0g of film-forming agent, 5.0g of conductive agent, 15.0g of composite adhesive Binder and 100g of solvent; wherein, the film-forming agent is NaBF 4 , the conductive agent is aminated graphene, the composite binder is composed of 6.0 g of sodium carboxymethyl cellulose and 9.0 g of sodium alginate, and the solvent is N-methylpyrrolidone.

[0058] The preparation method o...

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Abstract

The invention discloses a composite conductive agent for a lithium ion battery, a composite conductive liquid for the lithium ion battery, a preparation method of the conductive agent and the conductive liquid and the lithium ion battery, and belongs to the technical field of lithium ion batteries. The composite conductive agent for the lithium ion battery is prepared from, by weight, 0.5-2 parts of 3-(trimethylsilyl) borate and 1-5 parts of conductive agent. In the composite conductive agent for the lithium ion battery, 3-(trimethylsilyl) borate is added, the conductivity of lithium ions in the charging and discharging circulation process is benefited, impedance of the lithium ion battery is reduced easily, and accordingly it is guaranteed that circulation stability is excellent. Meanwhile, dissolution of Fe2+ in electrolyte can be well inhibited, SEI quality is improved, accordingly high-temperature circulating performance of the lithium ion battery can be improved, and application prospects in the lithium ion battery field are good.

Description

technical field [0001] The invention relates to a composite conductive agent for lithium ion batteries, a composite conductive liquid for lithium ion batteries, a preparation method thereof, and a lithium ion battery, belonging to the technical field of lithium ion batteries. Background technique [0002] In recent years, with the rapid development of the green energy industry, electrochemical energy storage technology has played an increasingly important role in human society and life. Various electrochemical energy storage devices are used in electric vehicles, energy storage, communication power supplies and electronic products. and other fields are becoming more and more widely used. Among them, lithium-ion batteries have many advantages such as high energy density, high power density, long cycle life, low self-discharge rate and environmental protection, and have become a hot spot for application. [0003] However, the use environment has a great influence on the servi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0525H01M10/0567
CPCH01M4/624H01M10/0525H01M10/0567Y02E60/10
Inventor 李志王燕
Owner LUOYANG LIRONG NEW ENERGY TECH
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