Aqueous MnO2/Mn2+ electrochemistry in batteries: progress, challenges, and perspectives

Literature Information

Publication Date 2023-12-06
DOI 10.1039/D3EE03661H
Impact Factor 38.532
Authors

Haoshen Zhou


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Abstract

Rechargeable aqueous MnO2-based batteries have attracted extensive attention and development in recent years owing to their inherent low cost, high safety, and competitive specific capacity. Although the emerging MnO2 dissolution/deposition chemistry directs the MnO2-based batteries towards high energy density, it results in undesirable complexity in the reaction mechanism and capacity evolution in the batteries with traditional ion intercalation reactions. Batteries driven by the exclusive MnO2 dissolution/deposition reaction provide promising practicability in high-energy-density systems with a high theoretical specific capacity (616 mA h g−1) and desirable theoretical potential (1.991 V vs. Zn/Zn2+), along with the availability of a cathode-free design in the absence of ion intercalation, but are faced by several key challenges on the way to commercial applications and large-scale energy storage. Herein, we provide an in-depth review of the basic mechanisms and advanced development of MnO2 dissolution/deposition chemistry and critically analyze the main issues in the two distinguishing systems for MnO2-based batteries: partial MnO2 dissolution/deposition with ion insertion/conversion and exclusive MnO2 dissolution/deposition. Finally, the future development directions of MnO2-based batteries are outlined to guide the research for fundamental science and next-generation aqueous batteries.

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Source Journal

Energy & Environmental Science

Energy & Environmental Science
CiteScore: 32.34
Self-citation Rate: 3.4%
Articles per Year: 481

Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics

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