Fig. 3
From: Synthesis and Investigation of CuGeO3 Nanowires as Anode Materials for Advanced Sodium-Ion Batteries
a The initial three CV curves of CGO nanowires at a scanning rate of 0.2 mV s−1. b The initial three charge/discharge curves and c cycling performance of the CGO nanowires at a current density of 50 mA g−1. Inset in c is the cycling performance of the elemental Ge at a current density of 50 mA g−1. d Rate capability of CGO nanowires at different current densities (from 50 to 500 mA g−1)