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Preparation method of ion-exchanging resin composite lithium manganate anode material

A composite lithium manganate and ion exchange technology, used in battery electrodes, electrical components, electrochemical generators, etc. Cumbersome steps and other problems, to achieve the effect of improving high temperature cycle performance, short overall process cycle, and simple preparation process

Inactive Publication Date: 2014-10-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the above-mentioned coating technology is not only cumbersome to operate, but also has disadvantages such as uneven coating layer, difficulty in controlling the thickness of the coating layer, and poor bonding between the coating material and lithium manganate.
In addition, the electronic conductivity and lithium ion transfer performance of the metal or non-metal oxides used are relatively poor, which makes the performance of the modified lithium manganate material not stable enough, and its cycle stability and fast charge The discharge rate performance still cannot be better improved

Method used

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  • Preparation method of ion-exchanging resin composite lithium manganate anode material
  • Preparation method of ion-exchanging resin composite lithium manganate anode material
  • Preparation method of ion-exchanging resin composite lithium manganate anode material

Examples

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Effect test

Embodiment 1

[0026] This example uses Nafion perfluorosulfonic acid resin to prepare ion-exchange resin composite lithium manganate cathode material. The specific steps are:

[0027] (1) preparation mass concentration is the hydroalcoholic solution of perfluorosulfonic acid resin of 1%wt, in this hydroalcoholic solution, the mass ratio of deionized water and ethanol is 1:9;

[0028] (2) Use a wet film preparation device with a thickness of 100 μm to coat a layer of perfluorosulfonic acid resin on the surface of the lithium manganate electrode, with a scraping speed of 150 mm / s and a loading capacity of 0.9 mg / cm 2 ;

[0029] (3) Treating the lithium manganate pole piece prepared in step (2) at a constant temperature for 6 hours at 80° C. to obtain a perfluorosulfonic acid resin composite lithium manganate positive electrode material;

[0030] (4) The composite lithium manganese oxide electrode sheet that step (3) is made is as positive pole, and metal lithium is as negative pole, and elec...

Embodiment 2

[0033] This example uses Nafion perfluorosulfonic acid resin to prepare ion-exchange resin composite lithium manganate cathode material. The specific steps are:

[0034] (1) preparation mass concentration is the hydroalcoholic solution of perfluorosulfonic acid resin of 1%wt, in this hydroalcoholic solution, the mass ratio of deionized water and ethanol is 1:9;

[0035](2) Use a wet film preparation device with a thickness of 150 μm to coat a layer of perfluorosulfonic acid resin on the surface of the lithium manganate electrode, with a scraping speed of 150 mm / s and a loading capacity of 1.3 mg / cm 2 ;

[0036] (3) Treating the lithium manganate pole piece prepared in step (2) at a constant temperature for 6 hours at 80° C. to obtain a perfluorosulfonic acid resin composite lithium manganate positive electrode material;

[0037] (4) The composite lithium manganese oxide electrode sheet that step (3) is made is as positive pole, and metal lithium is as negative pole, and elect...

Embodiment 3

[0039] This example uses Nafion perfluorosulfonic acid resin to prepare ion-exchange resin composite lithium manganate cathode material. The specific steps are:

[0040] (1) preparation mass concentration is the hydroalcoholic solution of perfluorosulfonic acid resin of 1%wt, in this hydroalcoholic solution, the mass ratio of deionized water and ethanol is 1:9;

[0041] (2) Use a wet film preparation device with a thickness of 250 μm to coat a layer of perfluorosulfonic acid resin on the surface of the lithium manganate electrode, with a scraping speed of 150 mm / s and a loading capacity of 2.2 mg / cm 2 ;

[0042] (3) Treating the lithium manganate pole piece prepared in step (2) at a constant temperature for 6 hours at 80° C. to obtain a perfluorosulfonic acid resin composite lithium manganate positive electrode material;

[0043] (4) The composite lithium manganese oxide electrode sheet that step (3) is made is as positive pole, and metal lithium is as negative pole, and elec...

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Abstract

The invention relates to a preparation method of an ion-exchanging resin composite lithium manganate anode material. The method is characterized in that a lithium manganate pole piece is adopted as a substrate, and the surface of the substrate is coated with ion-exchanging resin. The ion-exchanging resin in the anode material prepared through the method has an ion-exchanging group which can be bond onto Mn2+ generated through disproportionated reaction under the high-temperature condition, and the active substance (lithium manganate) in the anode material can be prevented from being contacted with trace HF (hydrogen fluoride) in electrolyte, so that the high-temperature cycling property of a lithium manganate battery can be improved. Compared with the prior art, the preparation method has the characteristics of simple preparation process, low cost, safety, short technological period and the like.

Description

technical field [0001] The invention belongs to the technical field of novel lithium-ion battery energy storage materials, and relates to a preparation method of a lithium-ion battery positive electrode material, in particular to a preparation method of an ion-exchange resin composite lithium manganate positive electrode material. Background technique [0002] In recent years, due to the rapid development of social economy, the consumption of non-renewable energy mainly based on petrochemical minerals has become more and more serious. Environmental issues. Chemical power sources have become an ideal alternative energy source due to their portability, low price, and environmental friendliness. [0003] At present, lithium-ion batteries in chemical power sources are receiving more and more attention. Due to the advantages of high energy density, high working voltage, long life, no memory effect and environmental friendliness, lithium-ion batteries have been widely recognized...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/62
CPCY02E60/122H01M4/1391H01M4/505H01M4/628H01M10/0525Y02E60/10
Inventor 刘未未李磊薛鹏潘磊王海滨
Owner SHANGHAI JIAO TONG UNIV