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Formation of hollow MoO 2 @C nano‐octahedrons using polyoxometalate‐based metal‐organic framework as a template for enhanced lithium‐ion batteries
Author(s) -
Wang Yu,
Zhao Hongsheng,
Di Andi,
Yang Xu,
Cong Bowen,
Chen Gang
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6472
Subject(s) - polyoxometalate , lithium (medication) , nanoparticle , materials science , composite number , chemical engineering , nanostructure , nanomaterials , carbon fibers , current density , metal organic framework , metal , energy storage , nanotechnology , chemistry , composite material , organic chemistry , catalysis , adsorption , metallurgy , medicine , engineering , endocrinology , power (physics) , physics , quantum mechanics
Summary Unique hollow MoO 2 @C nanoparticles are synthesized in situ by the polyoxometalate‐based metal‐organic framework as a precursor. Characteristic results show that the prepared MoO 2 @C nanoparticles have a narrow size distribution, and the C, mainly constituted by graphitic carbon, connects with the MoO 2 . Such a special structure guarantees a high electrical conductivity and high chemical stability of the synthesized MoO 2 @C composite material. MoO2@C composite material can provide a high reversible capacity of 1134 mAh g −1 at a current density of 500 mA g −1 after 200 cycles, and has a capacity retention of 88.24%. What's more, while the current density is doubled, the capacity stabilizes at 720 mAh g −1 , of which 81% is retained after 800 cycles. This work highlights that nanostructure design makes contributions to achieving advanced energy storage materials and provides a new concept of preparing organic‐inorganic hybrid materials for energy storage.