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Dual-ion battery

A dual-ion and battery technology, applied in the field of electrochemistry, can solve the problem that the capacity and cycle performance of anion intercalation graphite electrodes have not been effectively improved, and achieve the effects of insignificant capacity decay, improved capacity and cycle performance, and low viscosity.

Inactive Publication Date: 2016-03-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the capacity and cycle performance of anion-intercalated graphite electrodes based on organic solvents and lithium salts as electrolytes have not been effectively improved.

Method used

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Examples

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Effect test

Embodiment 1

[0035]Configure a 1mol / L lithium hexafluorophosphate solution in the glove box, wherein the solvent of the solution is a mixed solvent of sulfolane and ethyl methyl carbonate, and the volume content of ethyl methyl carbonate is 30%, and the above configured solution is placed in a glove One day in the box; using the above solution as the electrolyte, a dual-ion battery was produced in the glove box, wherein the positive pole was a graphite electrode, the negative pole was a lithium sheet, and the separator was glass fiber.

Embodiment 2

[0037] Configure a 1mol / L lithium hexafluorophosphate solution in the glove box, wherein the solvent of the solution is a mixed solvent of sulfolane and ethyl methyl carbonate, and the volume content of ethyl methyl carbonate is 40%, and the above-mentioned configured solution is placed in a glove One day in the box; using the above solution as the electrolyte, a dual-ion battery was produced in the glove box, wherein the positive pole was a graphite electrode, the negative pole was a lithium sheet, and the separator was glass fiber.

Embodiment 3

[0039] Configure a 1mol / L lithium hexafluorophosphate solution in the glove box, wherein the solvent of the solution is a mixed solvent of sulfolane and ethyl methyl carbonate, and the volume content of ethyl methyl carbonate is 50%, and the above-mentioned configured solution is placed in a glove One day in the box; using the above solution as the electrolyte, a dual-ion battery was produced in the glove box, wherein the positive pole was a graphite electrode, the negative pole was a lithium sheet, and the separator was glass fiber.

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Abstract

The present invention provides a dual-ion battery, which comprises a graphite positive electrode, a negative electrode, a separation member and an electrolytic solution, wherein the separation member and the electrolytic solution are positioned between the positive electrode and the negative electrode, and the electrolytic solution comprises an electrolyte and an organic solvent. According to the present invention, the chain-like carbonate is adopted as the organic solvent of the electrolytic solution and has excellent anti-oxidation property so as to significantly increase the anti-oxidation capacity of the electrolytic solution, and the chain-like carbonate has low viscosity and further has characteristics of electrolyte solubility increase, substantial electrolytic solution conductivity improving, and substantial dual-ion battery rate property improving, such that the capacity and the cycle performance of the dual-ion battery are effectively improved; sulfolane is added to the organic solvent so as to improve the anti-oxidation capacity of the electrolytic solution and the coulombic efficiency of the dual-ion battery; and the experimental results show that the capacity of the dual-ion battery of the present invention is 10-110 mAh / g, and the capacity attenuation is not obvious after cycle 750 times.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, and more specifically, relates to a dual-ion battery. Background technique [0002] With the rapid development of information electronic appliances in the current modern society and the application of electric vehicles, new secondary batteries with high specific capacity, good safety performance, less environmental pollution and long cycle life are developing rapidly all over the world. Since the 1990s, lithium-ion batteries are gradually replacing nickel-cadmium batteries and metal hydride nickel batteries, becoming the third generation of rechargeable "green batteries". [0003] Lithium-ion battery is a rechargeable battery. Its working principle is based on the extraction and insertion of lithium ions in the positive and negative electrodes during charging and discharging. Among them, the positive electrode material has a very important impact on the performance of lithium-ion batteri...

Claims

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Application Information

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IPC IPC(8): H01M10/0569
CPCY02E60/10
Inventor 王宏宇樊慧高继超齐力
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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