Preparation method of zinc manganate and graphene composite material
A composite material, graphene technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of increasing the cost of synthesizing zinc manganate/graphene composite materials, cumbersome synthesis process, and limiting application prospects, etc. Achieve the effect of improving the cycle performance, simplifying the synthesis process and making the process reasonable
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[0014] A preparation method of zinc manganate / graphene composite material, which comprises the following steps:
[0015] (1) Solution preparation: prepare an aqueous solution of graphite oxide with a concentration of 1~2g / L; prepare an aqueous solution of metal salt, in which Zn(CH 3 COO) 2 ·2H 2 O and Mn(CH 3 COO) 2 ·2H 2 The molar ratio of O is 1:2, Zn(CH 3 COO) 2 ·2H 2 The molar concentration of O is 0.05~0.2M.
[0016] (2) Solution mixing: Under stirring conditions, add the metal salt solution to the graphite oxide aqueous solution slowly at a volume ratio of metal salt aqueous solution: graphite oxide aqueous solution volume ratio of 1:5~7, and then transfer to the reactor after mixing evenly. When the concentration of the graphite oxide aqueous solution and the metal salt aqueous solution are lower than the minimum concentration in the above technical solution, the yield is low, and when the concentration is higher than the highest concentration in the above technical soluti...
Example Embodiment
[0022] Embodiment 1: A preparation method of zinc manganate / graphene composite material, which includes the following steps:
[0023] (1) Solution preparation: select graphite oxide synthesized by Hummers method, prepare graphite oxide aqueous solution with a concentration of 2g / L; prepare Zn(CH 3 COO) 2 ·2H 2 O and Mn(CH 3 COO) 2 ·2H 2 O metal salt aqueous solution, where Zn(CH 3 COO) 2 ·2H 2 The concentration of O is 0.1M, Mn(CH 3 COO) 2 ·2H 2 The concentration of O is 0.2M;
[0024] (2) Solution mixing: slowly add the above 2L metal salt solution to 12L graphite oxide aqueous solution under stirring conditions, and mix the solution evenly;
[0025] (3) Hydrothermal growth: Transfer the above-mentioned mixed solution into the reactor, adopt the hydrothermal method, set the temperature of the reactor to 180°C, and the reaction time of 12h;
[0026] (4) Product collection: After the reaction is over, after the reactor is cooled to room temperature, the precipitate is filtered a...
Example Embodiment
[0027] Embodiment 2: A preparation method of zinc manganate / graphene composite material, which includes the following steps:
[0028] (1) Solution preparation: select graphite oxide synthesized by Hummers method, prepare graphite oxide aqueous solution with a concentration of 1g / L; prepare Zn(CH 3 COO) 2 ·2H 2 O and Mn(CH 3 COO) 2 ·2H 2 O metal salt aqueous solution, where Zn(CH 3 COO) 2 ·2H 2 The concentration of O is 0.05M, Mn(CH 3 COO) 2 ·2H 2 The concentration of O is 0.1M;
[0029] (2) Solution mixing: slowly add the above 2L metal salt solution to 12L graphite oxide aqueous solution under stirring conditions, and mix the solution evenly;
[0030] (3) Hydrothermal growth: Transfer the above-mentioned mixed solution into the reactor, adopt the hydrothermal method, set the temperature of the reactor to 180°C, and the reaction time of 12h;
[0031] (4) Product collection: After the reaction is over, after the reactor is cooled to room temperature, the precipitate is filtered ...
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