Fig. 2: Electrochemical characterization of the Cu|0.5 M CuSO4|Se@C-48 coin cells.
From: Enabling fast-charging selenium-based aqueous batteries via conversion reaction with copper ions
a GCD curves of the first three cycles of Cu||Se@C-48 cell (the number represents the Se content) at 0.5 A g−1. b The discharging plateau and polarization between discharging and charging curves of Cu||Se@C-48 cell at 1 A g−1. c Rate performance, d corresponding GCD curves, e cycling stability test (5 A g−1), and f GCD curves at different cycles of the Cu||Se@C-48 cell.
