Fig. 5. Electrochemical performance of the MoSe_2+x-rGO‖NG full cell and MoSe_2+x-rGO‖K half cell at low temperature. (a) Discharge/charge profiles of the half cell and the full cell. (b) Cycling performance of the MoSe_2+x-rGO‖NG full cell at 100 mA g⁻¹; the inset is a corresponding optical image showing it powering a LED. (c) Cycling performance of the MoSe_2+x-rGO‖K half cell at 300 mA g⁻¹ and −20 °C.