Method for preparing ternary high-nickel positive electrode material by employing sol-gel self-propagating combustion method
A self-propagating combustion, cathode material technology, applied in electrode manufacturing, electrical components, battery electrodes, etc., can solve the problems of poor dispersion, insufficient combustion, and insufficient rate performance of cathode materials, and achieve high dispersion and uniformity. , the effect of improving the magnification performance
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Embodiment 1
[0042] (1) Dissolve lithium carbonate, nickel carbonate, cobalt carbonate and aluminum carbonate in deionized water according to the molar ratio of 1.1:0.6:0.3:0.1, and stir evenly, wherein the concentration of metal ions is 2mol / L; Add glutamic acid into the solution at a molar ratio of 1:1, add sodium fluoride at a molar ratio of 1:2 between sodium fluoride and glutamic acid, and stir evenly to make a mixed solution;
[0043] (2) Put the mixed solution obtained in step (1) in a water bath at 80°C until the water is fully evaporated to obtain a sol, place the obtained sol in an evaporating dish, heat up to 90°C in an oven and dry until the dry gel is formed ;
[0044] (3) heating the xerogel obtained in step (2) to 350° C. in an oven, and keeping it warm for 2 hours, so that the xerogel self-propagatingly burns to fully generate a fluffy powder;
[0045] (5) Under an oxygen atmosphere, heat up the powder obtained in step (3) to 600°C at a rate of 10°C / min for pre-sintering f...
Embodiment 2
[0048] (1) Dissolve lithium carbonate, nickel carbonate, cobalt carbonate and aluminum carbonate in deionized water according to the molar ratio of 1.2:0.8:0.15:0.05, and stir evenly, wherein the concentration of metal ions is 2mol / L; Add glutamic acid into the solution at a molar ratio of 1:2, add sodium fluoride at a molar ratio of 2:1 between sodium fluoride and glutamic acid, stir evenly, and make a mixed solution;
[0049] (2) Put the mixed solution obtained in step (1) in a water bath at 100°C until the water is fully evaporated to obtain a sol, put the obtained sol in an evaporating dish, heat up to 70°C in an oven and dry until the dry gel is formed ;
[0050] (3) heating the xerogel obtained in step (2) to 400° C. in an oven, and keeping it warm for 1 hour, so that the xerogel self-propagatingly burns to fully generate a fluffy powder;
[0051] (5) Under an oxygen atmosphere, heat up the powder obtained in step (3) to 400°C at a rate of 50°C / min for pre-sintering for...
Embodiment 3
[0054] (1) Lithium carbonate, nickel carbonate, cobalt carbonate and aluminum carbonate are dissolved in deionized water according to the molar ratio of 1.2:0.5:0.2:0.3, and stirred evenly, wherein the concentration of metal ions is 3.5mol / L; Add glutamic acid to the solution at a molar ratio of 2:1 for metal ions, add sodium fluoride at a molar ratio of 1:1 between sodium fluoride and glutamic acid, stir evenly, and make a mixed solution;
[0055] (2) Put the mixed solution obtained in step (1) in a water bath at 75°C until the water is fully evaporated to obtain a sol, place the obtained sol in an evaporating dish, and heat up to 100°C in an oven to dry until the dry gel is formed ;
[0056] (3) heating the xerogel obtained in step (2) to 270° C. in an oven, and keeping it warm for 2.5 hours, so that the xerogel self-propagatingly burns to fully generate a fluffy powder;
[0057] (5) Under an oxygen atmosphere, heat up the powder obtained in step (3) to 550°C for 7 hours at...
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