Graphene-enhanced integrated electrode, preparation method thereof and battery
A technology of graphene and graphene layers, applied in battery electrodes, secondary batteries, non-aqueous electrolyte storage battery electrodes, etc., can solve the problems that the electrochemical performance of electrode materials cannot be exerted, the electrode materials cannot be matched, and the high capacity advantages of materials are weakened. , to achieve enhanced mechanical stability, increased contact interface, and high capacity
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[0062] In the first embodiment of the present invention, the preparation method of the graphene-enhanced integrated electrode comprises the following steps:
[0063] S10. Provide a linear structure of conductive material and a linear structure of active material; wherein, the linear structure of conductive material is a current collector material with electron collection function, and the linear structure of active material can store energy by deintercalating ions s material;
[0064] S11. First, uniformly disperse the linear structure of the conductive material and the linear structure of the active material in an organic solvent to obtain a mixed material. After the mixed material is suction-filtered and dried, a wire cake is obtained, and the wire cake is compacted. Obtain a linear network structure formed by the interpenetration of the conductive material linear structure and the active material linear structure in three-dimensional space;
[0065] S12. Using a physical o...
Embodiment 1
[0103] A preparation method of a graphene-enhanced integrated electrode, comprising the following steps:
[0104] S101, preparation of conductive copper nanowires by hydrothermal method: NaOH aqueous solution (335mL, 15mol / L), Cu(NO 3 ) 2 (10mL, 0.2mol / L), ethylenediamine EDA (5mL), and 1.67mL of hydrazine hydrate with a mass concentration of 85% were mixed and added to a 500mL round bottom flask, mixed and stirred at 200rpm at 80°C for 80 minutes, and the reaction product was mixed with 3 % hydrazine hydrate, and centrifuged at 4500rpm, washed repeatedly with water and ethanol three times to obtain copper-containing nanowires, which were stored in ethanol;
[0105] S102. Preparation of active material silicon nanowires by chemical etching: use a porous aluminum oxide (AAO) film as a substrate (thickness about 60 μm, hole diameter 200 nm), evaporate Au on one side of the AAO template, and place the AAO on the single side Cover the hole and make it conductive on one side; the...
Embodiment 2
[0112] A preparation method of a graphene-enhanced integrated electrode, comprising the following steps:
[0113] S201, preparation of conductive platinum nanowires by solution precipitation method: take 20mmol / L of K 2 PtCl 4 Solution 10mL, after standing and aging for at least one day, mixed with 40mmol / L CTAB chloroform solution 10mL and stirred for 2h, then added 10mL 300mmol / L NaBH 4 Aqueous solution, continue to stir for 20 minutes, centrifuge to collect black precipitate, after repeated washing with water, platinum nanowires are obtained;
[0114] S202, in H 2 / Ar atmosphere, the platinum nanowires synthesized in step S201 were annealed at 450°C for 4 hours under a protective atmosphere, and then heated to 900°C, and 10% ethylene / Ar gas mixture was introduced, and the temperature was naturally cooled to room temperature after 2 hours of reaction to obtain graphene-enhanced Platinum nanowires;
[0115] S203. Preparation of active material sulfur nanowires by chemical...
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