A Nanoparticle ZnMn2O4/Graphene Composite Cathode Doubles the Reversible Capacity in an Aqueous Zn-Ion Battery
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Abstract
Zinc-ion batteries (ZIBs) are promising grid-scale energy storage devices owing to their low cost, high energy/power densities, high safety, benign environmental impact, etc. Among various cathode materials, ZnMn2O4 spinel has attracted attention because of its high theoretical capacity (448 mAh g−1) associated with the two-electron redox reaction of Mn ions (2+/4+), a higher voltage (≈1.4 V vs Zn/Zn2+) than V2O5-based cathodes (≈1.0 V), and better cyclability among manganese oxide-based cathodes. However, so far only the one-electron reaction of Mn ions is used with ZnMn2O4 spinel (≈224 mAh g−1), impairing its attractive features. In this study, ….
Read the original article on Advanced Functional Materials
Article Information:
Yuto Katsuyama, Chie Ooka, Ruijie Zhu, Reona Iimura, Masaki Matsui, Richard B. Kaner, Itaru Honma, Hiroaki Kobayashi
A Nanoparticle ZnMn2O4/Graphene Composite Cathode Doubles the Reversible Capacity in an Aqueous Zn-Ion Battery
Advanced Functional Materials,09 August 2024
DOI:10.1002/adfm.202405551