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Abundant Lithiophilic VO 2 /V 8 C 7 Heterostructures Boost Charge Transfer toward High‐Rate Lithium Storage
Author(s) -
Gao Yinhong,
Nan Xu,
Zhao Rong,
Sun Bing,
Xu Wenli,
Li Qiqi,
Cong Ye,
Li Yanjun,
Lv Wei,
Zhang Qin,
Li Xuanke,
Yang Nianjun
Publication year - 2025
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.202310117
Subject(s) - materials science , anode , overpotential , heterojunction , lithium (medication) , nucleation , current density , diffusion , chemical engineering , electrode , ion , analytical chemistry (journal) , nanotechnology , electrochemistry , optoelectronics , chemistry , thermodynamics , medicine , physics , quantum mechanics , chromatography , engineering , endocrinology
Abstract The construction of a heterogeneous structure on an electrode can enhance its absorption energy, thereby improving ionic diffusion and reaction kinetics. Herein, hyperdispersed VO 2 /V 8 C 7 nano‐heterostructures anchored on carbon nanofibers (VO 2 /V 8 C 7 @CNF), which are further utilized as a lithium anode are successfully developed. The self‐supported VO 2 /V 8 C 7 @CNF electrode features a synergistic effect, resulting from its well‐dispersed nano‐heterostructure, induced hetero‐interfacial electric field, and conspicuous lithiophilicity. This anode thus facilitates rapid Li + ions diffusion and charge transfer, resulting in high‐rate performance and uniform Li deposition. It exhibits a reversible specific capacity of as high as 674.8 mA h g −1 at a current density of 0.1 A g −1 and maintains a high‐rate capability of 205.3 mA h g −1 at a current density of as high as 5.0 A g −1 even after undergoing 1000 charge/discharge cycles. The Li‐ion nucleation overpotential on this anode is significantly reduced to 27 mV. The hyperdispersed nano‐heterostructure strategy offers a universal blueprint for the fabrication of high‐performance anodes not only for lithium and other batteries.