A two-electron transfer mechanism of the Zn-doped δ-MnO₂ cathode toward aqueous Zn-ion batteries with ultrahigh capacity

Wen Zhao; Jared Fee; Harshul S. Khanna; Seth March; Nathaniel Nisly; Samantha Joy B. Rubio; Can Cui; Zhuo Li; Steven L. Suib

doi:10.1039/d1ta10864f

January 1, 2022Journal of Materials Chemistry AOpen Access

A two-electron transfer mechanism of the Zn-doped δ-MnO₂ cathode toward aqueous Zn-ion batteries with ultrahigh capacity

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Key Points

Develop a high-capacity zinc-doped δ-MnO2 cathode material and systematically elucidate its electrochemical charge storage mechanism in aqueous zinc-ion batteries.
Synthesized Zn-doped δ-MnO2 cathode materials using a microwave-assisted method.
Analyzed structural evolution and reaction pathways using ex situ characterization techniques.
Identified a dual-carrier insertion mechanism involving the successive uptake of H+ and Zn2+ ions.
Demonstrated a deep two-electron transfer pathway that enables ultrahigh capacity in aqueous zinc-ion battery cathodes.

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Implication

Experimental study demonstrates a two-electron transfer mechanism in zinc-doped manganese dioxide cathodes, suggesting a pathway to ultrahigh-capacity aqueous zinc-ion batteries.

Abstract

We developed a Zn-doped δ-MnO 2 material via a microwave-assisted method for the cathode in aqueous ZIBs. The successive insertion of H + and Zn 2+ and deep two-electron transfer routes mechanism is revealed systematically by ex situ experiments.

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Zhao et al. (2022) studied this question.

synapsesocial.com/papers/69dd112f0de68e8319e53d91 https://doi.org/10.1039/d1ta10864f

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A two-electron transfer mechanism of the Zn-doped δ-MnO₂ cathode toward aqueous Zn-ion batteries with ultrahigh capacity

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

A two-electron transfer mechanism of the Zn-doped δ-MnO₂ cathode toward aqueous Zn-ion batteries with ultrahigh capacity

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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