Lattice expansion of MnO induced by sulphur doping for enhanced aqueous zinc-ion diffusion and storage

Lattice engineering is reported to enhance Zn 2+ storage capability of MnO via anionic doping, which effectively lowers the Zn 2+ diffusion barrier and boosts Zn 2+ diffusion kinetics. The optimized MnOS 0.3 @rGO exhibits superior rate capability and reversible capacity of 115.1 mA h g −1 at 0.5 A g −1 for 350 cycles. Lattice expansion induced by S-doping obviously promotes the electron transport and the diffusion and storage of zinc ions in MnO.