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Enhanced Kinetics over VS 4 Microspheres with Multidimensional Na + Transfer Channels for High‐Rate Na‐Ion Battery Anodes
Author(s) -
Li Wenbin,
Huang Jianfeng,
Li Ruizi,
Cao Liyun,
Li Xifei,
Chen Shaoyi,
Feng Liangliang
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201902130
Subject(s) - anode , materials science , electrochemistry , diffusion , electrode , chemical engineering , kinetics , ion , hydrothermal circulation , nanotechnology , battery (electricity) , crystal structure , crystallography , chemistry , organic chemistry , power (physics) , physics , quantum mechanics , engineering , thermodynamics
Developing 3 D self‐assembled nanoarchitectures with well‐defined crystal structures is an effective strategy to enhance the electrochemical performances of electrode materials. (1 1 0)‐oriented and bridged‐nanoblocks self‐assembled VS 4 microspheres are controllably synthesized by a facile one‐step hydrothermal method. The (1 1 0)‐bridged structure sets up open pathways for Na + diffusion among nanoblocks, and the (1 1 0)‐oriented structure provides unobstructed pathways for Na + diffusion in the nanoblocks, which collectively constructs multidimensional Na + transfer channels in the VS 4 microspheres, promoting the electrochemical kinetics. As an anode for Na‐ion batteries (SIBs), this material exhibits pseudocapacitive Na + storage and excellent rate capability, delivering high capacities of 339 and 270 mAh g −1 at rates of 0.1 and 2.0 A g −1 , respectively, with a capacity retention of 79 % in the voltage window of 0.5–3.0 V. In particular, the reversible capacity reaches 575 mAh g −1 after 300 cycles even at 1.0 A g −1 in the voltage window of 0.05–3.0 V, outperforming those of the ever‐reported VS 4 ‐based anode materials. This work presents an effective strategy to the exploration and design of high‐performance anodes for SIBs.