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Operando Investigation of Aqueous Zinc Manganese Oxide Batteries: Multi-stage Reaction Mechanism Revealed by Daren Wu; Steven T. King; Nahian Sadique; Lu Ma; Steven N. Ehrlich; Sanjit Ghose; Jianming Bai; Hui Zhong; Shan Yan; David C. Bock; Esther S. Takeuchi; Amy C. Marschilok; Lisa M. Housel; Lei Wang; Kenneth J. Takeuchi is a Engineering article available to read on EtoBox.
What is Operando Investigation of Aqueous Zinc Manganese Oxide Batteries: Multi-stage Reaction Mechanism Revealed about?
Aqueous Zn/MnO 2 batteries with mildly acidic electrolytes are promising candidates for low cost, high safety electrochemical energy storage for grid-scale applications. However, the complexity of the chemistry results in conflicting reports of operation principles, making rational improvements challenging. In this work, operando synchrotron X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) as well as ex situ Raman spectroscopy, XRD, and XAS characterization were used to probe the mechanism of aqueous Zn/a-MnO 2 batteries with ZnSO 4 electrolyte. A multi-stage Mn dissolution-conversion charge storage mechanism was revealed, which consists of reversible solidaqueous phase transformation via Mn dissolution-deposition reactions and a solid redox mechanism via Zn-ion insertion. This mechanism is supported by thermodynamic calculations paired with in situ electrolyte pH measurements to provide further mechanistic insights. The findings establish a detailed charge storage mechanism for aqueous Zn/a-MnO 2 batteries with a well resolved reversible layered charge product structure, that can serve as a reference for future studies on advancing the reversibility and stability of
Who reads Operando Investigation of Aqueous Zinc Manganese Oxide Batteries: Multi-stage Reaction Mechanism Revealed?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Daren Wu; Steven T. King; Nahian Sadique; Lu Ma; Steven N. Ehrlich; Sanjit Ghose; Jianming Bai; Hui Zhong; Shan Yan; David C. Bock; Esther S. Takeuchi; Amy C. Marschilok; Lisa M. Housel; Lei Wang; Kenneth J. Takeuchi
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)