Lithium battery cell structure, lithium battery structure and preparation method thereof
A lithium cell and lithium battery technology, which is applied in the manufacture of electrolyte batteries, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of low energy density and poor stability of solid lithium, and achieve improved conductivity, improved battery performance, and reduced content Effect
Inactive Publication Date: 2020-06-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0004] In order to overcome the problems of poor stability and low energy density of current solid-state lithium batteries, the present invention provides a lithium battery structure, a lithium battery structure and a preparation method thereof
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[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0031] See figure 1 The first embodiment of the present invention provides a lithium battery cell structure 10, which includes a composite polymer solid electrolyte 101, an interface modification layer 102, a negative electrode 103, a current collector 104, and a positive electrode 105 that are sequentially stacked. The composite polymer solid electrolyte 101 includes an organic substrate film having a porous structure and a polymer solid electrolyte impregnated into the porous structure of the organic substrate film.
[0032] Optionally, in some specific embodiments, the organic ba...
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Abstract
The invention relates to the technical field of lithium batteries, in particular to a lithium battery cell structure, a lithium battery structure and a preparation method. The lithium battery cell structure comprises a composite polymer solid electrolyte, an interface modification layer, a negative electrode, a current collector and a positive electrode which are stacked, wherein the composite polymer solid electrolyte comprises an organic matter substrate membrane with a porous structure and a polymer solid electrolyte injected into the porous structure of the organic matter substrate membrane. The composite polymer solid electrolyte has both an organic matter substrate membrane and a universal polymer solid electrolyte, so that the flexibility and the interface elasticity of the composite polymer solid electrolyte are remarkably superior to those of a conventional ceramic electrolyte, an interface in good contact with an electrode is easy to form, and the problem of interface desorption caused by volume expansion and contraction of the electrode can be improved. Moreover, the interface modification layer can well inhibit the formation of negative electrode lithium dendrites, so that the stability of the battery is improved. The positive electrode and the negative electrode of the lithium battery cell structure share one current collector, so that the content of inactive substances in the lithium battery cell can be well reduced, and the conductivity of the lithium battery cell structure is improved.
Description
【Technical field】 [0001] The present invention relates to the technical field of lithium batteries, and in particular to a lithium battery core structure, a lithium battery structure and a preparation method thereof. 【Background technique】 [0002] Since the commercialization of lithium batteries, due to their high specific capacity, long cycle life, and good safety performance, they have broad application prospects in electric vehicles, 3C products and other fields. Especially all-solid-state lithium batteries, due to their high safety performance, All-solid-state lithium batteries are the next generation of lithium battery technology. [0003] Many emerging technology fields continue to put forward new requirements for the energy density of all-solid-state lithium batteries. Traditional all-solid-state batteries usually use LiCoO 2 As a cathode material, the theoretical gram capacity of lithium cobalt oxide is only 270mAh / g, which cannot meet the current commercial demand...
Claims
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IPC IPC(8): H01M10/058H01M10/052H01M10/0565H01M4/13H01M4/131H01M4/134H01M4/137
CPCH01M10/058H01M10/052H01M10/0565H01M4/13H01M4/137H01M4/131H01M4/134H01M2300/0082Y02E60/10Y02P70/50
Inventor 向勇张皓官敏张晓琨
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA