Lithium ion battery anode plate, preparation method thereof and lithium ion battery using lithium ion battery anode plate
A lithium-ion battery and positive electrode technology, which is applied in the direction of battery electrodes, electrode carriers/collectors, non-aqueous electrolyte battery electrodes, etc., can solve problems affecting the industrialization of lithium-ion batteries, safety accidents, and difficult to meet, and achieve improved electrical conductivity properties, suppress dendrites, and have good electrical conductivity
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Embodiment 1
[0033] see figure 2 As shown, it is a schematic diagram of Example 1 of the preparation method of lithium-ion battery positive electrode sheet of the present invention, which includes the following steps:
[0034] In the first step, the cathode active material LiCoO 2 , N-type doped carbon nanotubes (N-doping CNT) and binder polyvinylidene fluoride (PVDF) are uniformly dissolved in the solvent N-methylpyrrolidone (NMP) at a weight ratio of 98.5:1:0.5 and stirred evenly; After evaporating the solvent NMP, N-doping CNT-coated LiCoO was obtained by crushing and grinding 2 powder.
[0035] In the second step, N-doping CNT-coated LiCoO 2 , P-type doped carbon nanotubes (P-dopingCNT), and binder styrene-butadiene rubber (SBR) are dissolved in solvent water at a weight ratio of 98.5:1:0.5 and stirred evenly; after evaporating solvent water, they are obtained by crushing and grinding LiCoO coated with P-Doping CNT and N-doping CNT 2 powder.
[0036] In the third step, LiCoO coa...
Embodiment 2
[0039] see image 3 Shown is a schematic diagram of Example 2 of the preparation method of the lithium ion battery positive electrode sheet of the present invention, which includes the following steps:
[0040] In the first step, the cathode active material LiCoO 2 , N-doping CNT and binder PVDF are uniformly dissolved in the solvent NMP at a weight ratio of 98.5:1:0.5 and stirred evenly; after the solvent PVDF is evaporated, LiCoO coated with N-doping CNT is obtained by crushing and grinding 2 powder.
[0041] In the second step, P-doping CNT and binder PVDF are dissolved in solvent water at a weight ratio of 2:1, and stirred evenly to obtain a slurry; the slurry is evenly coated on the Al alloy positive electrode current collector to make P-dopingCNT Coated Al alloy cathode current collector.
[0042] In the third step, N-doping CNT-coated LiCoO 2 1. The binder styrene-butadiene rubber (SBR) is dissolved in solvent water at a weight ratio of 98:2, and stirred evenly to o...
Embodiment 3
[0045] see Figure 4 Shown is a schematic diagram of Example 3 of the preparation method of the lithium ion battery positive electrode sheet of the present invention, which includes the following steps:
[0046] The first step: the cathode active material LiCoO 2 , N-doping CNT and binder PVDF are uniformly dissolved in the solvent NMP at a weight ratio of 98.5:1:0.5 and stirred evenly. After the solvent NMP is evaporated, LiCoO coated with N-doping CNT is obtained by crushing and grinding. 2 powder.
[0047] In the second step, the P-doping CNT and the binder PVDF are dissolved in the solvent NMP in a weight ratio of 2:1, and the slurry is evenly stirred to obtain a slurry; the slurry is evenly coated on the polyester film Mylar to obtain the P-doping CNT Coated thin film, and this thin film is used as positive electrode current collector.
[0048] In the third step, N-doping CNT-coated LiCoO 2 1. The binder SBR is dissolved in solvent water at a weight ratio of 98.5:1.5,...
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