A kind of preparation method of cation-doped ternary cathode material nanofiber
A cathode material and nanofiber technology, which is applied in the field of preparation of cation-doped ternary cathode material nanofibers, can solve the problems of low ion diffusion coefficient, low initial charge and discharge efficiency of ternary series materials, and unsatisfactory rate performance, etc. , to achieve huge application prospects, promote rapid migration, and improve the effect of rate performance
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Embodiment 1
[0030] LiNi 1 / 3 co 1 / 3 mn 1 / 3-0.02 Nb 0.02 o 2 A method for preparing nanofibers, comprising the steps of:
[0031] 1) Add 1.1mmol of nickel acetate, 1.1mmol of cobalt acetate, and 1.1mmol of manganese acetate into 5ml of N,N-dimethylformamide, stir magnetically at room temperature for 1 hour to dissolve completely, and obtain a homogeneous solution;
[0032] 2) Weigh 3.7 mmol of lithium acetate and 0.066 mmol of niobium chloride and add them to the solution obtained in step 1), and place them in a constant temperature oil bath at 65°C for magnetic stirring for 12 hours to obtain a homogeneous solution;
[0033]3) Weigh 0.6g polyacrylonitrile, add it into 5mL N,N-dimethylformamide, stir at room temperature for 12h, and dissolve it completely;
[0034] 4) Add all the solution obtained in step 2) to the solution obtained in step 3), and place it in a constant temperature oil bath at 65°C for magnetic stirring for 12 hours to obtain a uniform solution with a certain viscosit...
Embodiment 2
[0040] LiNi 0.4 co 0.2 mn 0.39 Nb 0.01 o 2 A method for preparing nanofibers, comprising the steps of:
[0041] 1) Add 1.3mmol of nickel chloride, 0.65mmol of cobalt chloride, and 1.29mmol of manganese chloride into 5ml of N,N-dimethylformamide, and magnetically stir for 1 hour at room temperature to completely dissolve to obtain a homogeneous solution;
[0042] 2) Weigh 3.7 mmol of lithium chloride and 0.033 mmol of niobium chloride and add them to the solution obtained in step 1), and place them in a constant temperature oil bath at 65°C for magnetic stirring for 12 hours to obtain a homogeneous solution;
[0043] 3) Weigh 0.6g polyacrylonitrile, add it into 5mL N,N-dimethylformamide, stir at room temperature for 12h, and dissolve it completely;
[0044] 4) Add all the solution obtained in step 2) to the solution obtained in step 3), and place it in a constant temperature oil bath at 65°C for magnetic stirring for 12 hours to obtain a uniform solution with a certain vis...
Embodiment 3
[0048] LiNi 0.5 co 0.2 mn 0.27 Nb 0.03 o 2 A method for preparing nanofibers, comprising the steps of:
[0049] 1) Add 1.65mmol of nickel acetate, 0.65mmol of cobalt acetate, and 0.89mmol of manganese acetate into 5ml of N,N-dimethylformamide, stir magnetically at room temperature for 1 hour to dissolve completely, and obtain a homogeneous solution;
[0050] 2) Weigh 3.7 mmol of lithium acetate and 0.099 mmol of niobium chloride and add them to the solution obtained in step 1), and place them in a constant temperature oil bath at 65°C for magnetic stirring for 12 hours to obtain a homogeneous solution;
[0051] 3) Weigh 0.6g polyacrylonitrile, add it into 5mL N,N-dimethylformamide, stir at room temperature for 12h, and dissolve it completely;
[0052] 4) Add all the solution obtained in step 2) to the solution obtained in step 3), and place it in a constant temperature oil bath at 65°C for magnetic stirring for 12 hours to obtain a uniform solution with a certain viscosit...
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