Authors
Xiaoli He, Song Huang, Yueliang Chen, Jiaming Xiong, Huatai Liang, Zuyang Hu, Minghui Ye, Yufei Zhang, Zhipeng Wen, Yongchao Tang, Qi Liu, Jian Zhu, Cheng Chao Li
Published in
ACS applied materials & interfaces. Jun 22, 2026. Epub Jun 22, 2026.
Abstract
Electrolytic zinc-manganese batteries (ZMBs) featuring high energy density and low cost hold significant potential for large-scale energy storage. However, their development is hindered by severe zinc corrosion and poor reversibility of the Mn2+/MnO2 conversion, originating from drastic pH fluctuations and an acidic environment. Herein, we propose an organic/inorganic self-stratifying electrolyte, which synergizes with the self-sacrificial sustained-release Zn(BF4)2 to regulate the zinc interface and MnO2 conversion chemistry. The design innovatively utilizes the in situ hydrolysis of BF4- to create an HF/F- buffer and free F- ions. The former stabilizes cathode pH and promotes uniform deposition and deep conversion of MnO2. Additionally, the released F- fosters a robust ZnF2-rich SEI on the zinc anode in a water-lean environment (organic phase), effectively suppressing corrosion and side reactions. Therefore, the zinc-symmetric battery with an organic phase exhibited a lifespan of over 650 h, exceeding conventional aqueous electrolytes by 38-fold. The Zn-MnO2 batteries deliver exceptional stability for 1800 cycles at 2C with an average Coulombic efficiency of 98.7%. This biphasic buffering-interface regulation strategy provides a generalizable approach to decouple interfacial challenges, which is promising for extension to other corrosion cell systems.
PMID:
42330428
Bibliographic data and abstract were imported from PubMed on 23 Jun 2026.
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