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1. (WO2017190417) METHOD FOR PREPARING THICK AND DENSE GRAPHENE-BASED ELECTRODE

Pub. No.:    WO/2017/190417    International Application No.:    PCT/CN2016/088763
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Thu Jul 07 01:59:59 CEST 2016
IPC: H01G 11/36
Applicants: GRADUATE SCHOOL AT SHENZHEN, TSINGHUA UNIVERSITY
清华大学深圳研究生院
Inventors: YANG, Quanhong
杨全红
LI, Huan
李欢
LUO, Jiayan
罗加严
YOU, Conghui
游从辉
TAO, Ying
陶莹
LIU, Donghai
刘东海
LV, Wei
吕伟
WU, Sida
吴思达
KANG, Feiyu
康飞宇
Title: METHOD FOR PREPARING THICK AND DENSE GRAPHENE-BASED ELECTRODE
Abstract:
Disclosed is a method for preparing a thick and dense graphene-based electrode. The method comprises the following steps for the preparation of a graphene hydrogel, compounding of the graphene and a salt component, gas formation and removal of the salt component, and preparation of the thick and dense graphene-based electrode. According to the method, a three-dimensional porous graphene block material is prepared by using the pore-forming effect of a gas-forming salt on a graphene network during heating. Compared with other pore-forming methods, the gas-forming salt does not etch the graphene during heating, the yield of the resulting graphene is high, and the method is suitable for mass production of porous graphene materials; the gas generated after heating is removed, and therefore, the resulting graphene has few impurities and a high purity; a small quantity of the remaining impurities occupy the pores of the graphene, and a secondary pore-forming effect is achieved on the graphene network after washing. The graphene is of a three-dimensional formed block structure and can be directly applied to an electrode material, the electrode has a higher thickness and a larger density, and the processing step of preparing an electrode from powdery graphene is also avoided.