Interdigital micro-supercapacitors are a promising miniaturized energy source. A research team led by WU Zhongshuai and BAO Xinhe from the CAS Dalian Institute of Chemical Physics of the Chinese Academy of Sciences, has reported a new-type of all-solid-state flexible planar lithium ion micro-capacitors. They were fabricated via layer-by-layer mask-assisted deposition of graphene (EG) and electrode materials, without metal current collector, additive and polymer binder. The resulting patterns of sandwich-like electrode structures showed outstanding uniformity, mechanical flexibility, and high electrical conductivity. Cycling stability was 98.9% of capacitance retention after 6000 cycles, and there was high electrochemical stability at 80 °C.

CAS news release, June 28, 2018