High-capacity solid lithium ion battery and preparation method thereof
A lithium-ion battery, high-capacity technology, applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of non-combustibility, low first effect, etc., and achieve the effects of preventing shedding, improving electrical conductivity, and alleviating volume expansion
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Embodiment 1
[0043] Accurately weigh polyvinylidene fluoride PVDF, thermoplastic polyurethane TPU, and polyimide PI according to a mass ratio of 1:1:1, dissolve them in acetone and N,N-dimethylformamide, stir until completely dissolved, and then add 10wt% LGPS (Li 10 GeP 2 S 12 ) and 30wt% LiTFSI, stirred to a viscous gel, which is the PTPL type organic-inorganic polymer electrolyte, and then spun into a film with a thickness of 0.2mm by electrospinning technology, and the film was vacuum-dried at 80°C for 24h, After the film was flattened, it was punched into an original sheet with a diameter of 19 mm by a die to obtain a PTPL organic-inorganic polymer electrolyte film.
[0044] Glucose (3 wt%), carboxymethylcellulose CMC and SBR solution (2 wt%) were added to Na 2 SiO 3 In the saturated solution, stirring and dissolving, the powder obtained after spray drying was slowly added to the concentrated sulfuric acid solution in an argon atmosphere glove box (simultaneously completing the ca...
Embodiment 2
[0050] Add sucrose (5wt%), CMC and SBR solution (2wt%) to Na 2 SiO 3 In the saturated solution, stirring and dissolving, the powder obtained after spray drying was slowly added into a certain amount of concentrated sulfuric acid solution in an argon atmosphere glove box (simultaneously completing the carbonization of other carbon sources such as sucrose and Na 2 SiO 3 Precipitate SiO under acidic conditions 2), after the reaction is complete, slowly add deionized water dropwise, wash and filter, dry, and obtain the SiC composite spherical porous material by magnesia thermal reduction, and mix the SiC composite spherical porous material and lithium powder (10wt%) ball milling Obtain SiCL composite anode.
[0051] Preparation of the positive electrode sheet: Weigh the positive electrode material manganese-rich ternary material xLi according to the mass ratio (80:10:10) 2 MnO 3 ·(1-x)LiNi 0.8 co 0.1 mn 0.1 o 2 , conductive carbon black and binder (polyvinylidene fluoride...
Embodiment 3
[0056] Accurately weigh polyvinylidene fluoride PVDF, thermoplastic polyurethane TPU, and polyimide PI according to a mass ratio of 1:1:1, dissolve them in acetone and N,N-dimethylformamide, stir until completely dissolved, and then add 10wt%LGPS (Li 10 GeP 2 S 12 ) and a certain amount of LiTFSI, stirred until viscous gel, which is the PTPL type organic-inorganic polymer electrolyte, and then spun into a film with a thickness of about 0.2mm by electrospinning technology, and vacuum dried the film at 80°C for 24h After the film was flattened, it was punched into an original film with a diameter of 19mm by a die to obtain a PTPL type organic-inorganic polymer electrolyte film.
[0057] Preparation of the positive electrode sheet: Weigh the positive electrode material manganese-rich ternary material xLi according to the mass ratio (80:10:10) 2 MnO 3 ·(1-x)LiNi 0.8 co 0.1 mn 0.1 o 2 , conductive carbon black and binder (PTPL type organic-inorganic polymer electrolyte), th...
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