Abstract

Reversible oxidative anion insertion and reductive cation insertion are two antipodal electrochemical processes of solids. However, irreversible pre-insertion in host materials may transform their electrochemical properties of storing ions with the opposite electrical charge. In the article, number https://doi.org/10.1002/cey2.37, Heng Jiang and Xiulei Ji report that initial Zn2+ trapping enhances the reversible Cl− storage ability of Mn3O4. This unique “counter-ion insertion” (CII) mechanism provides a general electrosynthesis methodology to bestow targeted electrochemical properties.

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