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Improving Lithium‐Ion Half‐/Full‐Cell Performance of WO 3 ‐Protected SnO 2 Core‐Shell Nanoarchitectures
Author(s) -
Iftikhar Muhammad,
Ali Basit,
Nisar Talha,
Wagner Veit,
Haider Ali,
Hussain Sajjad,
Bahadar Ali,
Saleem Muhammad,
Abbas Syed Mustansar
Publication year - 2021
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.202002408
Subject(s) - anode , materials science , coating , lithium (medication) , nanotechnology , cathode , carbon fibers , oxide , chemical engineering , nanostructure , electrode , nanoparticle , composite material , metallurgy , chemistry , composite number , medicine , endocrinology , engineering
Anodes derived from SnO 2 offer a greater specific capacity comparative to graphitic carbon in lithium‐ion batteries (LIBs); hence, it is imperative to find a simple but effective approach for the fabrication of SnO 2 . The intelligent surfacing of transition metal oxides is one of the favorite strategies to dramatically boost cycling efficiency, and currently most work is primarily aimed at coating and/or compositing with carbon‐based materials. Such coating materials, however, face major challenges, including tedious processing and low capacity. This study successfully reports a new and simple WO 3 coating to produce a core‐shell structure on the surface of SnO 2 . The empty space permitted natural expansion for the SnO 2 nanostructures, retaining a higher specific capacity for over 100 cycles that did not appear in the pristine SnO 2 without WO 3 shell. Using WO 3 ‐protected SnO 2 nanoparticles as anode, a coin half‐cell battery was designed with Li‐foil as counter‐electrode. Furthermore, the anode was paired with commercial LiFePO 4 as cathode for a coin‐type full cell and tested for lithium storage performance. The WO 3 shell proved to be an effective and strong enhancer for both current rate and specific capacity of SnO 2 nanoarchitectures; additionally, an enhancement of cyclic stability was achieved. The findings demonstrate that the WO 3 can be used for the improvement of cyclic characteristics of other metal oxide materials as a new coating material.