Lithium battery structure and preparation method thereof

A lithium battery and lithium compound technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of low electrical conductivity and high impedance, and achieve the effect of reducing interface impedance and maintaining stability

Pending Publication Date: 2019-06-25
成都大超科技有限公司
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  • Abstract
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Problems solved by technology

[0003] In order to overcome the problem of low electrical conductivity caused by the large impedance between the interfaces of the current solid-state lithium battery,

Method used

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  • Lithium battery structure and preparation method thereof
  • Lithium battery structure and preparation method thereof
  • Lithium battery structure and preparation method thereof

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[0041] 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.

[0042] see figure 1 , a lithium battery structure 10, comprising a positive electrode structure 100, a negative electrode structure 300 and an oxide solid electrolyte layer 200 disposed therebetween, the positive electrode structure 100 comprising M x o y type transition metal oxide, the positive electrode structure 100 is formed with a positive electrode modification layer 400 on the side facing the oxide solid electrolyte layer 200; the oxide solid electrolyte layer 200 includes an oxide containing lithium; the negative electrode structure 300 includes an oxide containing A lithium compound,...

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Abstract

The invention relates to the technical field of lithium batteries, in particular to a lithium battery structure and a preparation method thereof. The lithium battery structure comprises a positive electrode structure, a negative electrode structure and an oxide solid electrolyte layer arranged between the two structures. The positive electrode structure comprises an M<x>O<y> type transition metaloxide. A positive electrode modification layer is formed on one side, facing the oxide solid electrolyte layer, of the positive electrode structure. The oxide solid electrolyte layer comprises a lithium-containing oxide. The negative electrode structure comprises a Li<m>SiC

composite material containing lithium, silicon and carbon. A negative electrode modification layer is formed on one side,facing the oxide solid electrolyte layer, of the negative electrode structure. The formation of the positive electrode modification layer and the negative electrode modification layer well reduces theinterface impedance, enhances the stability of the lithium battery structure and improves the energy density and cycle stability.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery structure and a preparation method thereof. 【Background technique】 [0002] Since SONY developed the first generation of commercial lithium batteries in the 1990s, lithium batteries have been widely used in digital electronic products, electric vehicles and large-scale energy storage due to their advantages of high energy density and output operating voltage. Traditional lithium batteries using organic electrolytes have the problem of fire and explosion under overcharge, short circuit and other states. Replacing organic electrolytes with solid electrolytes will completely solve this problem. Metal oxide electrode materials have high specific capacity (≥700mAh / g) and high voltage platform (≥4.5V), and the manufacturing process is relatively simple, so they are the first choice for high-energy lithium battery electrode materials. The oxide solid elect...

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Application Information

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IPC IPC(8): H01M4/48H01M4/36H01M4/583H01M4/62H01M10/0525H01M10/0562
CPCY02E60/10
Inventor 张晓琨
Owner 成都大超科技有限公司
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