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Ammonium Ion and Structural Water Co‐Assisted Zn 2+ Intercalation/ De‐Intercalation in NH 4 V 4 O 10 ∙0. 28H 2 O †
Author(s) -
Zhu Ting,
Mai Bo,
Hu Ping,
Liu Ziang,
Cai Congcong,
Wang Xuanpeng,
Zhou Liang
Publication year - 2021
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.202100004
Subject(s) - intercalation (chemistry) , cathode , aqueous solution , electrochemistry , chemistry , vanadate , ammonium , inorganic chemistry , ion , chemical engineering , electrode , organic chemistry , engineering
Main observation and conclusion The cathode material plays a crucial role in the performances of aqueous zinc‐ion batteries (ZIBs). Herein, we report an ammonium vanadate (NH 4 V 4 O 10 ∙0.28H 2 O, NHVO) aqueous ZIB cathode material. The obtained NHVO microflowers manifest high discharge capacity (410 mA·h∙g –1 at 0.2 A∙g –1 ), long‐term durability (76% capacity retention over 500 cycles), as well as ideal rate performance (112 mA·h∙g –1 at 10 A∙g –1 ). The impressive electrochemical performance can be attributed to the ammonium ion and structural water co‐assisted Zn 2+ intercalation/de‐intercalation, which has been demonstrated by various ex‐situ and in‐situ characterizations. The superior electrochemical performance makes the NHVO microflower an ideal candidate cathode material for aqueous ZIBs.