All-solid-state lithium-ion battery and preparation method thereof

Abstract

The invention discloses an all-solid-state lithium-ion battery and a preparation method thereof. The all-solid-state lithium-ion battery comprises a housing, an insulating diaphragm and a solid-state composite electrode core, wherein the solid-state composite electrode core comprises at least one group of single solid-state composite electrode plates; each single solid-state composite electrode plate comprises a first all-solid-state electrolyte layer, a negative pole piece, a second all-solid-state electrolyte layer and a positive pole piece; each negative pole piece is provided with an A-side active coating and a B-side active coating; each first all-solid-state electrolyte layer is arranged on the corresponding A-side active coating; each second all-solid-state electrolyte layer is arranged on the corresponding B-side active coating; each positive pole piece is arranged on the corresponding second all-solid-state electrolyte layer; and the solid-state composite electrode core is sleeved with the insulating diaphragm and is packaged into the housing. The all-solid-state lithium-ion battery has the advantages that a combinational design of double all-solid-state electrolyte layers, a positive electrode, a negative electrode and an electrolyte is adopted by the all-solid-state lithium-ion battery, and the producing and manufacturing requirements of the all-solid-state lithium-ion batteries of different shapes can be met.

Description

technical field [0001] The invention relates to an all-solid lithium ion battery and a preparation method thereof. Background technique [0002] In the new round of power battery investment boom, all-solid-state lithium batteries are becoming the "new darling" of the next generation of global lithium battery technology. [0003] All-solid-state lithium batteries are divided into polymer all-solid-state lithium batteries and inorganic all-solid-state lithium batteries. For the research and manufacture of all-solid-state lithium batteries, lithium battery manufacturers at home and abroad are also striving to pursue new types of thin and light lithium batteries. All-solid-state lithium batteries mainly include three parts: positive electrode, solid electrolyte and negative electrode. Compared with liquid lithium-ion batteries with positive electrode, negative electrode, electrolyte and thin film, all-solid-state lithium-ion batteries are more simplified in structure. [0004]...

AI Technical Summary

Problems solved by technology

The application number of Fudan University is 200510028248.X, which is named as an equipment and method for in-situ deposition and preparation of all-solid-state thin-film lithium batteries. It is composed of four deposition film chambers and a glove box in series. Preparation in the chamber, the manufacturing process is complicated, and the film deposition rate is low

Patent No. ZL201110212694.1, patent name: A double-layer thin-film all-solid-state thin-film lithium battery spray pyrolysis battery manufacturing method, which proposes to use double spray guns to simultaneously spray two layers of precursors at the junction of the positive electrode solid electrolyte layer and the negative electrode layer solution to form a buffer layer of all-solid-state thin-film lithium-ion battery spray pyrolysis manufacturing method, the electrolyte layer cannot be uniformly sprayed

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