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Metal/ion filter layer, preparation method thereof, and application thereof in battery

A filter layer and metal technology, applied in the direction of battery electrodes, lithium batteries, electrode carriers/collectors, etc., can solve the problems of metal loss battery coulombic efficiency reduction, dendrites, fire, etc.

Active Publication Date: 2019-12-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, both Li metal and Na metal suffer from dendrites and loss during charge-discharge cycles
Dendrites can puncture the separator, shorting the battery and causing a fire
Lithium metal and sodium metal will cause a decrease in Coulombic efficiency in each cycle of charging and discharging.
Nowadays, such as patent CN201610319583.3 and patent CN 201610252135.6, it is proposed to use a support structure or a skeleton structure as a stable body to protect the metal negative electrode without a body. Although the problem of metal volume expansion is solved, there is no ion / metal protective layer on the surface of the support structure Or the filter layer, which cannot prevent the side reaction between the metal and the electrolyte, which will cause the loss of the metal and the reduction of the coulombic efficiency of the battery

Method used

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  • Metal/ion filter layer, preparation method thereof, and application thereof in battery
  • Metal/ion filter layer, preparation method thereof, and application thereof in battery
  • Metal/ion filter layer, preparation method thereof, and application thereof in battery

Examples

Experimental program
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Effect test

Embodiment 1

[0100] In the first step, ascorbic acid and copper foam were added to the graphene oxide solution and sonicated for 15 minutes. In the second step, the mixture was put into a hydrothermal reactor and heated to 180° C. for 8 hours. In the third step, after being cooled to room temperature, the obtained solid is washed three times with deionized water, and then freeze-dried to obtain the treated metal protection material.

Embodiment 2

[0102] In the first step, ascorbic acid and copper foam were added to the graphene oxide solution and sonicated for 15 minutes. In the second step, the mixture was put into a hydrothermal reactor and heated to 150° C. for 8 hours. In the third step, after being cooled to room temperature, the obtained solid is washed three times with deionized water, and then freeze-dried to obtain the treated metal protection material.

Embodiment 3

[0104] In the first step, ascorbic acid and copper foam were added to the graphene oxide solution and sonicated for 15 minutes. In the second step, the mixture was put into a hydrothermal reaction kettle and heated to 180° C. for 12 hours. In the third step, after being cooled to room temperature, the obtained solid is washed three times with deionized water, and then freeze-dried to obtain the treated metal protection material.

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Abstract

The present application discloses a metal / ion filter layer applied to a battery. The metal / ion filter layer is a multilayer stacked material. The ion / metal filter layer can increase the overpotentialof metal deposition, filters and integrates ions and metal, and prevents fresh metal from coming into contact with an electrolyte to produce side reactions. The metal can be just deposited on the surface of a support structure, rather than the surface of the ion / metal filter layer.

Description

technical field [0001] The application relates to a metal / ion filter layer, its preparation method and its application in batteries, belonging to the field of batteries. Background technique [0002] As early as 1992, before Sony Corporation of Japan launched the world's first lithium-ion battery, in 1958, a graduate student at the University of California proposed the idea of ​​lithium, sodium and other active metals as battery negative electrodes. research on metal batteries. Since the science and technology at that time could not solve the safety problem of metal batteries, scientists began to pay more attention to the research of lithium-ion batteries with better safety performance. Nowadays, lithium-ion batteries are widely used in various portable electronic devices and new energy vehicles. However, lithium-ion batteries are limited by the research and development bottleneck of graphite negative electrode specific capacity, and cannot meet the needs of people to devel...

Claims

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Application Information

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IPC IPC(8): H01M4/134H01M4/1395H01M4/66H01M10/052
CPCH01M4/134H01M4/1395H01M4/661H01M4/663H01M4/667H01M10/052Y02E60/10
Inventor 任飞鸿彭哲王木钦林欢李振东王德宇
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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