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Author(s) -
Shan Lutong,
Wang Yiren,
Liang Shuquan,
Tang Boya,
Yang Yongqiang,
Wang Ziqing,
Lu Bingan,
Zhou Jiang
Publication year - 2021
Publication title -
infomat
Language(s) - English
Resource type - Journals
ISSN - 2567-3165
DOI - 10.1002/inf2.12245
Subject(s) - vanadate , adsorption , ion , diffusion , kinetics , aqueous solution , phase (matter) , activation energy , materials science , chemistry , crystallography , analytical chemistry (journal) , chemical engineering , thermodynamics , inorganic chemistry , physics , chromatography , organic chemistry , quantum mechanics , engineering
Authors reported the biphasic vanadate, i.e., Na 1.2 V 3 O 8 /K 2 V 6 O 16 ·1.5H 2 O (designated as Na 0.5 K 0.5 VO), and detected the interfacial Adsorption‐Insertion mechanism induced by phase boundaries (DOI: 10.1002/inf2.12223 ). First‐principles calculations indicated that large amount of Zn 2+ and H + ions would be absorbed by the phase boundaries and most of them would insert into the host structure, which not only promote the specific capacity, but also effectively reduce diffusion energy barrier towards faster reaction kinetics. As a result, the aqueous Zn/Na 0.5 K 0.5 VO performs excellent rate capability as well as long‐term cycling performance, for example, a stable capacity of 267 mA h g ‐1 after 800 cycles at 5 A g ‐1 can be achieved.