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Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO 2 Interpenetrated MXene V 2 C Architecture as Anode Materials
Author(s) -
Liu Darong,
Wang Libo,
He Yan,
Liu Lu,
Yang Zhengpeng,
Wang Bo,
Xia Qixun,
Hu Qianku,
Zhou Aiguo
Publication year - 2021
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000753
Subject(s) - anode , materials science , nanocomposite , chemical engineering , lithium (medication) , battery (electricity) , nanoparticle , intercalation (chemistry) , current density , ion , specific surface area , composite number , nanotechnology , electrochemistry , energy storage , electrode , composite material , inorganic chemistry , chemistry , catalysis , organic chemistry , medicine , power (physics) , physics , quantum mechanics , endocrinology , engineering
As an anode material, SnO 2 nanoparticles have the problem of volume expansion and agglomeration, limiting their applications in energy storage. Herein, a nanocomposite material with hybridization structure using SnO 2 interpenetrated MXene V 2 C as an anode for Li‐ion battery is fabricated by a simple method. The laminated structure of V 2 C can restrain the volume expansion of SnO 2 nanoparticles anchored on the surface of V 2 C layers, whereas the intercalation of SnO 2 nanoparticles into the V 2 CT x layer can effectively prevent the restacking of the V 2 CT x nanosheets in charging and discharging processes. This heterogeneous structure enables high Li‐ion storage on the surface and in the near‐surface region, which results in rapid transport of Li ions and optimizes the rate performance and cycling property. Consequently, the V 2 CT x @SnO 2 nanocomposite has a large reversible capacity of ≈768 mAh g −1 after 200 cycles at a current density of 1000 mA g −1 . Competitively, its reversible capacity can reach 260 mAh g −1 at high current density of 8000 mA g −1 after 1000 cycles, showing excellent cycling stability and superior rate capability. In addition to the high Li‐ion capacity offered by the composite structure, the anode also maintains the structural and mechanical integrity provided by MXene in charging and discharging processes.