Three-electrode all-solid-state lithium ion battery and preparation method thereof
A lithium-ion battery, three-electrode technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve the problems of less three-electrode solid lithium batteries, poor chemical kinetic performance and low capacity of all-solid-state batteries, etc. To achieve the effect of simple and controllable preparation process, conducive to performance analysis, and obvious technical effect
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[0040] A preparation method of the three-electrode all-solid-state lithium-ion battery, comprising the following steps:
[0041] a. Preparation of LTO reference electrode
[0042](1) Add lithium titanate particles, conductive agent and binder into a ball mill in a mass ratio of 85-95:5-10:5-10 and solvent. The ball mill has built-in zirconia, and the grinding balls are steel balls, tungsten carbide balls, One or more of the polyamine peptide balls; the ball-to-material ratio is 5 to 10:50 to 75, and the ball is milled for 30 to 60 minutes at room temperature to obtain a uniformly dispersed slurry;
[0043] (2) Immerse a lithium alloy mesh with a lithium atomic mass fraction of 20 to 80%, a thickness of 5 to 15 μm and a pore size of 50 to 100 μm in the slurry prepared in step (1) for 30 to 60 minutes, and vacuum bake after taking it out. , the baking temperature is 70~90℃, and the baking time is 4~8 hours to obtain the LTO reference electrode;
[0044] b. Preparation of Cs-do...
Embodiment 1
[0055] like figure 1 As shown, a three-electrode all-solid-state lithium ion battery includes a positive electrode, a negative electrode, a reference electrode and a solid electrolyte 5, and the positive electrode includes a positive electrode current collector 6, a positive electrode coating 7 and a positive electrode drain 2, and the positive electrode coating Including a positive electrode active material and a conductive agent; the negative electrode includes a negative electrode sheet 8 and a negative electrode drain end 3; the reference electrode includes an LTO reference electrode 4 and a reference electrode drain end 1; The positive electrode current collector 6 is directed toward the LTO reference One side of electrode 4; the assembled structure of the battery is LTO reference electrode 4-solid electrolyte 5-positive electrode sheet-solid electrolyte 5-negative electrode sheet 8.
[0056] The positive active material is lithium iron phosphate; the conductive agent is ...
Embodiment 2
[0071] like figure 1 As shown, a three-electrode all-solid-state lithium ion battery includes a positive electrode, a negative electrode, a reference electrode and a solid electrolyte 5, and the positive electrode includes a positive electrode current collector 6, a positive electrode coating 7 and a positive electrode drain 2, and the positive electrode coating Including a positive electrode active material and a conductive agent; the negative electrode includes a negative electrode sheet 8 and a negative electrode drain end 3; the reference electrode includes an LTO reference electrode 4 and a reference electrode drain end 1; The positive electrode current collector 6 is directed toward the LTO reference One side of electrode 4; the assembled structure of the battery is LTO reference electrode 4-solid electrolyte 5-positive electrode sheet-solid electrolyte 5-negative electrode sheet 8.
[0072] The positive active material is lithium manganate; the conductive agent is condu...
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