Compared with six state-of-arts methods, the proposed framework demonstrates a superior performance.
Moreover, the flexible all-solid-state asymmetric supercapacitor device fabricated by using rGO/CoAl-LDH as positive electrode demonstrates a superior performance compared to most reported rGO-based free-standing film electrodes.
It demonstrates a superior specific capacitance of 139 F g−1 at a superhigh current of 100 A g−1 in an aqueous electrolyte, maintaining 73.5% of that at 1 A g−1 (189 F g−1).
The assembled Li/PI battery demonstrates a superior volumetric energy density (170.5 Wh L−1), a stable cycling performance (>100 cycles, averaged decay < 0.16% at 0.2 C), a high energy efficiency (>84%, 100 cycles at 2 C), and a high coulombic efficiency (>95%, 100 cycles at 2 C).
This metal-free material demonstrates a superior catalytic performance in terms of a comparable electrocatalytic activity, a better tolerance to the methanol crossover effect and an improved long-term durability toward ORR in the alkaline media when compared with the commercial Pt/C catalyst.
Most importantly, the Co3O4@PPy hybrid electrode demonstrates a superior cycling performance (~85.5 % capacitance retention after 5000 cycles).
