Affiliation:
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan Hubei 430070 P. R. China
2. Department of Physics School of Science Wuhan University of Technology Wuhan 430070 P. R. China
3. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan 528200 P. R. China
Abstract
AbstractManganese hexacyanoferrate (MnHCF) is one of the most promising cathode materials for aqueous battery because of its non‐toxicity, high energy density, and low cost. But the phase transition from MnHCF to Zinc hexacyanoferrate (ZnHCF) and the larger Stokes radius of Zn2+ cause rapid capacity decay and poor rate performance in aqueous Zn battery. Hence, to overcome this challenge, a solvation structure of propylene carbonate (PC)‐trifluoromethanesulfonate (Otf)‐H2O is designed and constructed. A K+/Zn2+ hybrid battery is prepared using MnHCF as cathode, zinc metal as anode, KOTf/Zn(OTf)2 as the electrolyte, and PC as the co‐solvent. It is revealed that the addition of PC inhabits the phase transition from MnHCF to ZnHCF, broaden the electrochemical stability window, and inhibits the dendrite growth of zinc metal. Hence, the MnHCF/Zn hybrid co‐solvent battery exhibits a reversible capacity of 118 mAh g−1 and high cycling performance, with a capacity retention of 65.6% after 1000 cycles with condition of 1 A g−1. This work highlights the significance of rationally designing the solvation structure of the electrolyte and promotes the development of high‐energy‐density of aqueous hybrid ion batteries.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
China Postdoctoral Science Foundation
Subject
General Materials Science,General Chemistry
Cited by
2 articles.
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