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Article Abstract
Electrolytic aqueous zinc-manganese (Zn-Mn) batteries have the advantage of high discharge voltage and high capacity due to two-electron reactions. However, the pitfall of electrolytic Zn-Mn batteries is the sluggish deposition reaction kinetics of manganese oxide during the charge process and short cycle life. We show that, incorporating ZnO electrolyte additive can form a neutral and highly viscous gel-like electrolyte and render a new form of electrolytic Zn-Mn batteries with significantly improved charging capabilities. Specifically, the ZnO gel-like electrolyte activates the zinc sulfate hydroxide hydrate assisted Mn deposition reaction and induces phase and structure change of the deposited manganese oxide (ZnMnO·HO nanorods array), resulting in a significant enhancement of the charge capability and discharge efficiency. The charge capacity increases to 2.5 mAh cm after 1 h constant-voltage charging at 2.0 V vs. Zn/Zn, and the capacity can retain for up to 2000 cycles with negligible attenuation. This research lays the foundation for the advancement of electrolytic Zn-Mn batteries with enhanced charging capability.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10767122 | PMC |
| http://dx.doi.org/10.1007/s40820-023-01296-y | DOI Listing |
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