A kind of preparation method of negative electrode material of lithium ion battery
A lithium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low reversible capacity, poor cycle performance, particle pulverization and other problems of negative electrode materials, so as to avoid expansion, inhibit expansion performance, The effect of improving adsorption performance
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[0022] A preparation method of a negative electrode material for a lithium ion battery, the preparation method comprising the steps of:
[0023] (1) According to the mass ratio of 1:4 to 6:5, take tetraethyl orthosilicate, ethylene glycol and ethanol solution and mix evenly, ultrasonically oscillate for 10 minutes, then add an additive of 1 to 3% tetraethyl orthosilicate, and stir Mix and stand for 10-15 hours to obtain the basic mixed solution;
[0024] (2) In terms of parts by mass, take 70-90 parts of basic mixed solution, 40-50 parts of ammonia water, 4-6 parts of cetylpyridinium bromide, 3-7 parts of modifier, and 1-5 parts of surface active Put the agent into the reactor, use nitrogen protection, stir and react at 1.3-1.5MPa, 122-125°C for 6-8h;
[0025] (3) After the reaction is over, collect the reaction mixture, mix the reaction mixture, tin tetrachloride, water and graphene evenly according to the mass ratio of 2:4~6:5:4~7, adjust the pH to 6.5~7.0, and statically ...
Embodiment 1
[0028] The additive of choice is barium nitrate.
[0029] The choice of modifier is to mix n-octyltriethoxysilane and vinyltrimethoxysilane in a mass ratio of 4:6.
[0030] The choice of surfactant is sodium dodecylbenzenesulfonate.
[0031] A preparation method of a negative electrode material for a lithium ion battery, the preparation method comprising the steps of:
[0032] (1) According to the mass ratio of 1:6:5, take tetraethyl orthosilicate, ethylene glycol and ethanol solution and mix evenly, ultrasonically oscillate for 10 minutes, then add 3% additive of tetraethyl orthosilicate, stir and mix, let stand 15h, to get the base mixture;
[0033] (2) In terms of parts by mass, take 90 parts of basic mixed solution, 50 parts of ammonia water, 6 parts of cetylpyridinium bromide, 7 parts of modifier, and 5 parts of surfactant into the reactor, and use nitrogen protection , stirred and reacted at 1.5MPa, 125°C for 8h;
[0034] (3) After the reaction, collect the reaction ...
Embodiment 2
[0037] The additive of choice is barium sulfate.
[0038] The choice of modifier is to mix n-octyltriethoxysilane and vinyltrimethoxysilane in a mass ratio of 4:5.
[0039] The choice of surfactant is sodium lauryl sulfate.
[0040] A preparation method of a negative electrode material for a lithium ion battery, the preparation method comprising the steps of:
[0041] (1) According to the mass ratio of 1:5:5, take tetraethyl orthosilicate, ethylene glycol and ethanol solution and mix evenly, ultrasonically oscillate for 10 minutes, then add 2% of tetraethyl orthosilicate as an additive, stir and mix, and let stand 13h, to get the base mixture;
[0042] (2) In terms of parts by mass, take 80 parts of basic mixed solution, 45 parts of ammonia water, 5 parts of cetylpyridinium bromide, 5 parts of modifier, and 3 parts of surfactant into the reactor, and use nitrogen protection , stirred and reacted at 1.4MPa, 123°C for 7h;
[0043] (3) After the reaction, collect the reaction...
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