2D ReS2 nanosheets embedded on porous carbon framework for efficient and stable all-solid-state flexible supercapacitor

All-solid-state flexible supercapacitors with high-efficiency and durable performance show a promising application prospect in wearable electronics, electrochemical energy storage. However, it still exists challenges to integrate flexible, efficient and stable performance for all-solid-state supercapacitor. In this work, we have synthesized the ultra-high density ReS2 nanosheets on the porous carbon framework (ReS2@PCF) by a hydrothermal method. Based on ReS2@PCF, we have further prepared a ReS2@PCF-based supercapacitor device. Electrochemical measurements demonstrate that the flexible ReS2@PCF electrode possesses a specific capability of 125.3 F/g and also a large power density of 10.278 kW/kg at a charge/discharge current density of 5 A/g, which is able to light up a red light-emitting diodes (LED). Moreover, it keeps a high 91.5% capacitance retention ratio after being tested for 6000 cycles. Our work offers a new insight into the solutions for the integration of flexible, highly efficient and stable supercapacitor. It shows a potential application in special cases, such as wearable electronic clothes, and it will also facilitate their development towards a practical application.