Preparation method of copper-doped ternary positive electrode material
A positive electrode material, copper doping technology, applied in positive electrodes, electrical components, battery electrodes, etc., can solve the problems of unstable electrochemical performance of products, long calcination time, difficult diffusion process, etc., to save research and development time and cost, The effect of improving electrochemical performance and simple synthesis process
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Embodiment 1
[0033] A method for preparing a copper-doped ternary positive electrode material, comprising the following steps:
[0034] (1) Weigh NiSO with an electronic balance 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O, CuSO 4 ·5H 2 O, make the molar ratio n(Ni:Co:Mn:Cu)=0.59:0.2:0.2:0.01, add deionized water to be mixed with 1.5L, 2.5mol / L mixed metal solution;
[0035] Take ammonia water as a complexing agent, dissolve it in deionized water, and prepare 0.5 L of solution B with a concentration of 3 mol / L;
[0036] Take sodium hydroxide as a precipitant, dissolve it in deionized water, and prepare a solution C with a concentration of 10mol / L;
[0037] (2) Add 2L, 0.9mol / L ammonia solution to the 5L reaction kettle as the bottom liquid; Add solution A, solution B and solution C to the reaction kettle at a constant speed under the control of the peristaltic pump to control the feed flow rate of solution A ≤3mL / min, the feed flow rate of solution B is ≤1.2mL / min, the feed flow rate ...
Embodiment 2
[0042] A method for preparing a copper-doped ternary positive electrode material, comprising the following steps:
[0043] (1) Weigh NiSO with an electronic balance 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O, CuSO 4 ·5H 2 O, to make the molar ratio n(Ni:Co:Mn:Cu)=0.6:0.17:0.2:0.03, add deionized water to prepare a mixed metal solution of 1.5L, 2mol / L;
[0044] Take ammonia water as a complexing agent, dissolve it in deionized water, and prepare a solution B with a concentration of 0.5 L and 2 mol / L;
[0045] Take sodium hydroxide as a precipitating agent, dissolve it in deionized water, and prepare a solution C whose concentration is 8mol / L;
[0046] (2) Add 2L, 1mol / L ammonia solution to the 5L reaction kettle as the bottom liquid; add solution A, solution B and solution C to the reaction kettle at a uniform speed under the control of the peristaltic pump, and control the feed flow rate of solution A≤ 3mL / min, the feed flow rate of solution B is ≤1.2mL / min, the feed fl...
Embodiment 3
[0049] A method for preparing a copper-doped ternary positive electrode material, comprising the following steps:
[0050] (1) Weigh NiSO with an electronic balance 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O, CuSO 4 ·5H 2 O, make the molar ratio n(Ni:Co:Mn:Cu)=0.33:0.33:0.33:0.01, add deionized water to prepare 1L, 3mol / L mixed metal solution;
[0051] Take ammonia water as a complexing agent, dissolve it in deionized water, and prepare a solution B with a concentration of 0.5 L and 3 mol / L;
[0052] Take sodium hydroxide as a precipitating agent, dissolve it in deionized water, and prepare a solution C whose concentration is 5mol / L;
[0053] (2) Add 1.5L, 1mol / L ammonia solution to the 5L reaction kettle as the bottom liquid; add solution A, solution B and solution C to the reaction kettle at a constant speed under the control of the peristaltic pump, and control the feed flow rate of solution A ≤3mL / min, the feed flow rate of solution B is ≤1.2mL / min, the feed flow ra...
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