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Engineering Vanadium Pentoxide Cathode for the Zero‐Strain Cation Storage via a Scalable Intercalation‐Polymerization Approach
Author(s) -
Wang Zhiqiao,
Tang Xiaoyu,
Yuan Song,
Bai Miao,
Wang Helin,
Liu Siyuan,
Zhang Min,
Ma Yue
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202100164
Subject(s) - intercalation (chemistry) , materials science , cathode , vanadium , polymerization , pentoxide , chemical engineering , polyaniline , inorganic chemistry , chemistry , polymer , composite material , engineering , metallurgy
The layered V 2 O 5 cathode exhibits appealing features of multiple electron redox processes and versatile cation‐storage capacities. However, the huge volume respiration induces structural collapse and limits its commercial‐scale deployment. Herein, a scalable water‐bath strategy is developed to tailor the (001) spacing of the bulk V 2 O 5 from the original 4.37 Å to its triple value (14.2 Å). The intercalated polyaniline (PANI) molecules act as pillars in the V 2 O 5 interlayer, thus affording the abundant storage sites and enhanced cation diffusivities of Li + , Na + , or hydrated Zn 2+ . Upon various cations (de‐)intercalation, transmission‐mode operando X‐ray diffraction is employed to document the zero‐strain behavior of the PANI‐intercalated V 2 O 5 . This scalable intercalation‐polymerization strategy, coupled with the compatibility study of the ionic radius and the c ‐lattice for the layered structure, enables the rational engineering of the intercalation‐type cathodes toward facile reaction kinetics.