Abstract
A practical Zn-MnO2 battery is still challenged by the deterioration stability under the low current density due to the activeness of water in aqueous electrolyte. Herein, we reported a novel and practical hybrid silica-based ZnSO4/MnSO4 mixed solution (Si-ZMSO) electrolyte, which obviously improved the cycle stability of Zn-MnO2 battery. The Si-ZMSO electrolyte can widen the ESW of electrolyte and restrain the side reaction of zinc anode, which can achieve a good cyclic stability over 400 h for Zn∥Zn symmetrical battery. This novel hybrid electrolyte can also stabilize the cyclic performance of Zn-MnO2 batteries compared to ZMSO electrolyte. In particular, it exhibits a good capacity retention after 200 cycles under the high cathode loading and low current density. This novel strategy is expected to advance the development of Zn-MnO2 batteries.
摘要
由于水系电解液的活泼性,水系锌锰电池在低电流密度下稳定性仍然受到挑战。本文报道了一种新型实用的氧化硅基的ZnSO4/MnSO4混合溶液电解质(Si-ZMSO),显著提高了Zn-MnO2电池体系的循环稳定性。Si-ZMSO电解液拓宽了电化学稳定窗口,同时能够抑制锌负极的副反应。因此,锌对称电池表现出了400 h 以上的良好循环稳定性。与ZnSO4/MnSO4水系电解液(ZMSO)相比,使用这种新型的混合电解质还可以提高Zn-MnO2电池的循环稳定性能。电池在高负载量和低电流密度下循环200 次后仍表现出良好的容量保持率。这种新颖的合成策略有望拓展水系锌锰电池的研究思路和发展。
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HUANG Jing and PENG Qian contributed equally to this work. HUANG Jing, LIU Kun and FANG Guo-zhao contributed to the overall idea. HUANG Jing and PENG Qian carried out the specific experiments. All authors contributed to the writing and revision.
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The authors declare that they have no conflict of interest.
Foundation item: Projects(51774330, 52072411) supported by the National Natural Science Foundation of China; Project(2015) supported by the Teacher Research Foundation of Central South University, China; Project(2022ZZTS0422) supported by the Fundamental Research Funds for the Central Universities, China; Project(2021JJ20060) supported by the Natural Science Foundation of Hunan Province, China; Project(2021RC3001) supported by the Science and Technology Innovation Program of Hunan Province, China
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Huang, J., Peng, Q., Liu, K. et al. Silica-based electrolyte regulation for stable aqueous zinc-manganese batteries. J. Cent. South Univ. 30, 434–442 (2023). https://doi.org/10.1007/s11771-023-5228-5
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DOI: https://doi.org/10.1007/s11771-023-5228-5