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Hydrogen‐Bond Reinforced Superstructural Manganese Oxide As the Cathode for Ultra‐Stable Aqueous Zinc Ion Batteries
Author(s) -
Li Jianwei,
Luo Ningjing,
Kang Liqun,
Zhao Fangjia,
Jiao Yiding,
Macdonald Thomas J.,
Wang Min,
Parkin Ivan P.,
Shearing Paul R.,
Brett Dan J.L.,
Chai Guoliang,
He Guanjie
Publication year - 2022
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202201840
Subject(s) - materials science , cathode , intercalation (chemistry) , manganese , aqueous solution , dissolution , oxide , chemical engineering , inorganic chemistry , metallurgy , chemistry , engineering
Layered manganese oxides adopting pre‐accommodated cations have drawn tremendous interest for the application as cathodes in aqueous zinc‐ion batteries (AZIBs) owing to their open 2D channels for fast ion‐diffusion and mild phase transition upon topochemical (de)intercalation processes. However, it is inevitable to see these “pillar” cations leaching from the hosts owing to the loose interaction with negatively charged Helmholtz planes within the hosts and shearing/bulking effects in 2D structures upon guest species (de)intercalation, which implies a limited modulation to prevent them from rapid performance decay. Herein, a new class of layered manganese oxides, Mg 0.9 Mn 3 O 7 ·2.7H 2 O, is proposed for the first time, aims to achieve a robust cathode for high‐performance AZIBs. The cathode can deliver a high capacity of 312 mAh g −1 at 0.2 A g −1 and exceptional cycling stability with 92% capacity retention after 5 000 cycles at 5 A g −1 . The comprehensive characterizations elucidate its peculiar motif of pined Mg‐□Mn‐Mg dumbbell configuration along with interstratified hydrogen bond responsible for less Mn migration/dissolution and quasi‐zero‐strain characters. The revealed new structure‐function insights can open up an avenue toward the rational design of superstructural cathodes for reversible AZIBs.