Preparation method of anode material of lithium-ion power battery lithium vanadium phosphate
A technology for power batteries and positive electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of large investment in industrial production equipment, cumbersome gel-making process, poor cycle stability, etc., and achieve convenient industrial production and electrochemical reaction. The effect of many active points and long cycle life
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Embodiment 1
[0024] 1) Prepare white turbid NH with a concentration of 50 g / L with deionized water 4 VO 3 solution and LiOH·H with a concentration of 100 g / L 2 O aqueous solution, the LiOH·H 2 Add O aqueous solution to NH 4 VO 3 Stir evenly in the white turbid solution until the solution becomes clear;
[0025] 2) Add hydrazine hydrate dropwise to the solution prepared in step 1) until the solution turns light yellow;
[0026] 3) Prepare 100 g / L (NH 4 ) 2 HPO 4 aqueous solution, and then add this aqueous solution to the light yellow solution in step 2) to obtain a brown-black solution;
[0027] 4) Add a mass of NH to the brown-black solution 4 VO 3 The 1,4-butynediol of quality 20%, add ammoniacal liquor under stirring, the pH value of adjustment solution is 10;
[0028] 5) Put the solution obtained in step 4) in a polytetrafluoroethylene reactor, and after fully reacting at 180 °C, wash with deionized water and dry to obtain the precursor powder; then at 700 °C, under the prote...
Embodiment 2
[0033] 1) Prepare white turbid NH with a concentration of 70 g / L with deionized water 4 VO 3 solution and LiOH·H with a concentration of 120 g / L 2 O aqueous solution, the LiOH·H 2 Add O aqueous solution to NH 4 VO 3 Stir evenly in the white turbid solution until the solution becomes clear;
[0034] 2) Add hydrazine hydrate dropwise to the solution prepared in step 1) until the solution turns light yellow;
[0035] 3) Prepare 110 g / L (NH 4 ) 2 HPO 4 aqueous solution, and then add this aqueous solution to the light yellow solution in step 2) to obtain a brown-black solution;
[0036] 4) Add a mass of NH to the brown-black solution 4 VO 3 The 1,4-butynediol of quality 40%, add ammoniacal liquor under stirring, the pH value of adjusting solution is 12.5;
[0037] 5) Put the solution obtained in step 4) in a polytetrafluoroethylene reactor, and after fully reacting at 200 °C, wash with deionized water and dry to obtain the precursor powder; then at 750 °C, under the prot...
Embodiment 3
[0042] 1) Prepare white turbid NH with a concentration of 100 g / L with deionized water 4 VO 3 solution and LiOH·H with a concentration of 140 g / L 2 O aqueous solution, the LiOH·H 2 Add O aqueous solution to NH 4 VO 3 Stir evenly in the white turbid solution until the solution becomes clear;
[0043] 2) Add hydrazine hydrate dropwise to the solution prepared in step 1) until the solution turns light yellow;
[0044] 3) Prepare 120 g / L (NH 4 ) 2 HPO 4 aqueous solution, and then add this aqueous solution to the light yellow solution in step 2) to obtain a brown-black solution;
[0045] 4) Add a mass of NH to the brown-black solution 4 VO 3 The 1,4-butynediol of quality 60%, add ammoniacal liquor under stirring, the pH value of adjusting solution is 14;
[0046] 5) Place the solution obtained in step 4) in a polytetrafluoroethylene reactor, and after fully reacting at 220 °C, wash with deionized water and dry to obtain the precursor powder; then at 800 °C, under the pro...
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