Preparation method for lithium iron phosphate cathode material
A technology of lithium iron phosphate and cathode material, applied in chemical instruments and methods, phosphorus compounds, battery electrodes, etc., can solve the problems of low efficiency of low-viscosity slurry and poor performance of high-viscosity slurry.
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Embodiment 1
[0037] test group:
[0038] Weigh 150.8g anhydrous ferric phosphate (FePO 4 ), 33.8g lithium carbonate (Li 2 CO 3 ), 23.8g glucose (C 6 h 12 o 6 ·H 2 O), respectively as phosphorus, iron source, lithium source and carbon source for synthesizing positive electrode material lithium iron phosphate. Then add 26.05g of triamine citrate as a dispersant, and 26.05g of carboxymethylcellulose ammonium as a binding agent. The above components were added with 139.6 g of pure water (the solid content of the slurry was 65%).
[0039] Control group:
[0040] Weigh 150.8g anhydrous ferric phosphate (FePO 4 ), 33.8g lithium carbonate (Li 2 CO 3 ), 23.8g glucose (C 6 h 12 o 6 ·H 2 O), respectively as phosphorus, iron source, lithium source and carbon source for synthesizing positive electrode material lithium iron phosphate. The above components were added with 112.2 g of pure water (the solid content of the slurry was 65%).
[0041]The above two groups were respectively put i...
Embodiment 2
[0048] test group:
[0049] Weigh 150.8g anhydrous ferric phosphate (FePO 4 ), 33.8g lithium carbonate (Li 2 CO 3 ), 23.8g glucose (C 6 h 12 o 6 ·H 2 O), respectively as phosphorus, iron source, lithium source and carbon source for synthesizing positive electrode material lithium iron phosphate. Then add 16.6g of polyammonium methacrylate as a dispersant, and 11.8g of polyethylene oxide as a binder. The above components were added with 127.5 g of pure water (the solid content of the slurry was 65%).
[0050] Control group:
[0051] Weigh 150.8g anhydrous ferric phosphate (FePO 4 ), 33.8g lithium carbonate (Li 2 CO 3 ), 23.8g glucose (C 6 h 12 o 6 ·H 2 O), respectively as phosphorus, iron source, lithium source and carbon source for synthesizing positive electrode material lithium iron phosphate. The above components were added with 112.2 g of pure water (the solid content of the slurry was 65%).
[0052] The above two groups were respectively put into a stirri...
Embodiment 3
[0058] test group:
[0059] Weigh 150.8g anhydrous ferric phosphate (FePO 4 ), 33.8g lithium carbonate (Li 2 CO 3 ), 23.8g glucose (C 6 h 12 o 6 ·H 2 O), respectively as phosphorus, iron source, lithium source and carbon source for synthesizing positive electrode material lithium iron phosphate. Then add 8.6g polyammonium methacrylate as a dispersant, and 10.5g gum arabic powder as a binding agent. The above components were added with 422.5 g of pure water (the solid content of the slurry was 35%).
[0060] Control group:
[0061] Weigh 150.8g anhydrous ferric phosphate (FePO 4 ), 33.8g lithium carbonate (Li 2 CO 3 ), 23.8g glucose (C 6 h 12 o 6 ·H 2 O), respectively as phosphorus, iron source, lithium source and carbon source for synthesizing positive electrode material lithium iron phosphate. The above components were added with 387.0 g of pure water (the solid content of the slurry was 35%).
[0062] Put the above two groups into the stirring mill for dispe...
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