Method for preparing lithium-manganese phosphate positive material by adopting wet-chemical method

[0014] (1) Mix 118.1g of lithium phosphate (Shanghai Zhongli Industrial Co., Ltd., purity 98%) and 412.1g of manganese phosphate crystals (analytically pure, purity 99%) into a mortar, then add 62.5g of absolute ethanol to grind After 3 hours ethanol volatilized completely, the mixture became powder;

[0015] (2) Add 6.25g of pharmaceutical grade ascorbic acid, grind it evenly, then add 625g of 4% polyvinyl alcohol (molecular weight 6000) solution, and stir it evenly on a small disperser to form a slurry;

[0016] (3) Pour the slurry into a hydrothermal reaction kettle, seal it well, heat it to 180°C and keep it for 10 hours, then cool down to room temperature, open the reaction kettle and pour out all the materials, and carry out blast drying at 105°C to form a lump;

[0017] (4) Use a tubular experimental electric furnace to raise the temperature of the block to 450°C at a rate of 5°C / min under the protection of high-purity nitrogen, keep it warm for 2 hours, and then heat i...

[0020] (1) Mix 118.1g of lithium phosphate (Shanghai Zhongli Industrial Co., Ltd., purity 98%) and 412.1g of manganous phosphate crystals (analytically pure, purity 99%) into a mortar, then add 62.5g of absolute ethanol to grind After 1.2 hours, the ethanol evaporated completely, and the mixture became powder;

[0021] (2) Add 6.25g of pharmaceutical grade ascorbic acid, grind evenly, then add 625g of 4% polyvinyl alcohol (molecular weight: 15,000) solution, and use a small dispersion disc to stir evenly into a slurry;

[0022] (3) Pour the slurry into a hydrothermal reaction kettle, seal it well, heat it to 180°C and keep it for 10 hours, then cool down to room temperature, open the reaction kettle and pour out all the materials, and carry out blast drying at 105°C to form a block;

[0023] (4) Use a tube-type experimental electric furnace to raise the temperature of the block to 450°C at a rate of 5°C / min under the protection of high-purity nitrogen, keep it for 2 hours, and...

[0026] (1) Mix 120.5g of lithium phosphate (Shanghai Zhongli Industrial Co., Ltd., purity 98%) and 412.1g of manganese phosphate crystals (analytically pure, purity 99%) into a mortar, then add 62.5g of absolute ethanol to grind After 3 hours ethanol volatilized completely, the mixture became powder;

[0027] (2) Add 6.25g of pharmaceutical grade ascorbic acid, grind evenly, then add 625g of 4% polyvinyl alcohol (molecular weight 10000) solution, stir evenly to form a slurry;

[0028] (3) Pour the slurry into a hydrothermal reaction kettle, heat to 180°C for 10 hours, then cool down to room temperature, open the reaction kettle, pour out all the materials, and carry out blast drying at 105°C to form lumps;

[0029] (4) Use a tube-type experimental electric furnace to raise the temperature of the block to 450°C at a rate of 5°C / min under the protection of high-purity nitrogen, keep it for 2 hours, and then raise the temperature to 700°C at a rate of 5°C / min for 4 hours. Natura...