Lithium metal negative electrode structure combination, preparation method thereof and lithium battery cell
A lithium metal negative electrode and lithium battery technology, applied in the direction of battery electrodes, electrode manufacturing, secondary batteries, etc., can solve the problems of short battery life, poor safety, etc., and achieve good uniformity and compactness, appropriate thickness, and good ion conduction performance effect
Inactive Publication Date: 2018-08-03
成都亦道科技合伙企业(有限合伙)
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[0003] In order to overcome the problems of poor safety and short battery life in current lithium metal-based negative electrode lithium batteries, the present invention provides a lithium metal negative electrode structure combination with stable structure and high specific capacity and a preparation method thereof
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[0028] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0029] see figure 1 , a lithium metal negative electrode structure combination 10, the lithium metal negative electrode structure combination 10 includes a negative electrode structure 100 and a surface modification layer 200 formed on the negative electrode structure 100. The negative electrode structure 100 includes a negative electrode current collector 1001 and a lithium metal negative electrode layer 1002 formed on the negative electrode current collector 1001 . The surface modification layer 200 is formed on the lithium metal negative electrode layer 1002, and the negative electrode curre...
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Abstract
The invention relates to the technical field of a lithium battery, in particular to a lithium metal negative electrode structure combination and a preparation method thereof. The metal lithium negative electrode structure combination comprises a negative electrode structure and a surface modification layer, wherein the surface modification layer is formed on the negative electrode structure, the negative electrode structure comprises a negative current collector and a lithium metal negative electrode layer, the lithium metal negative electrode layer is formed on the negative current collector,the negative current collector, the lithium metal negative electrode layer and the surface modification layer are arranged in a lamination way, the lithium metal negative electrode layer comprises alithium metal active material, and the surface modification layer comprises a lithium compound having ion conduction characteristic. The surface modification layer has a modification effect on a surface of the lithium metal negative electrode layer, the surface defect of the lithium metal negative electrode layer is improved, the situations that charges are not uniformly distributed on the lithiummetal negative electrode layer during the charge-discharge process to form lithium dendrites and an electrolyte separator layer is punctured to cause short circuit of the battery are prevented, meanwhile, the lithium dendrites are limited from being formed on the lithium metal negative electrode layer, so that the charges are uniformly distributed on the lithium metal negative electrode layer, and the specific capacity density of the lithium metal negative electrode layer is improved.
Description
【Technical field】 [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium metal negative electrode structure combination and a preparation method thereof. 【Background technique】 [0002] Lithium batteries have been widely used in the electronics industry and energy storage industry since 1990. As an important part of lithium batteries, negative electrode materials directly affect the voltage, specific capacity and energy density of lithium batteries. The specific capacity of the traditional lithium metal negative electrode is low (~300mAh / g), while the lithium metal negative electrode material has the highest specific capacity (~3862mAh / g), and is considered as the negative electrode material of the new generation of high specific energy lithium battery. However, during the charge-discharge cycle, lithium batteries with lithium metal-based negative electrodes will generate lithium dendrites, which will pierce the separator and ca...
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IPC IPC(8): H01M4/134H01M4/1395H01M4/04H01M10/0525H01M10/0585H01M10/42H01M10/0562
CPCH01M4/0426H01M4/134H01M4/1395H01M10/0525H01M10/0562H01M10/0585H01M10/4235Y02E60/10Y02P70/50
Inventor 张晓琨宋世湃
Owner 成都亦道科技合伙企业(有限合伙)
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