Fig. 7: Degradability of the CPZ-H electrolyte in a Zn/MnO2 full cell.
From: A recyclable biomass electrolyte towards green zinc-ion batteries

a Diagrammatic sketch of the CPZ-H electrolyte biodegradation process. b–e Optical photographs of the decomposition process of a CPZ-H electrolyte in a Bacillus culture liquid. f–i Microscopic photographs of Bacillus on the CPZ-H electrolyte at different stages of decomposition. j Photographs of actual decomposition of the CPZ-H electrolyte in natural soil at various timepoints. k Comparison of CPZ-H electrolyte biodegradation mechanism, time, and characteristics with those that have been reported for other biodegradable energy-storage devices22,38,39,40,41,42.