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Titanium Dioxide/Lithium Phosphate Nanocomposite Derived from Atomic Layer Deposition as a High‐Performance Anode for Lithium Ion Batteries
Author(s) -
Wang Biqiong,
Liu Jian,
Sun Qian,
Xiao Biwei,
Li Ruying,
Sham TsunKong,
Sun Xueliang
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600369
Subject(s) - materials science , atomic layer deposition , nanocomposite , anatase , lithium (medication) , anode , electrolyte , titanium dioxide , chemical engineering , faraday efficiency , electrode , inorganic chemistry , electrochemistry , amorphous solid , nanotechnology , layer (electronics) , composite material , catalysis , chemistry , organic chemistry , medicine , photocatalysis , endocrinology , engineering
Atomic layer deposition (ALD) is considered as a powerful technique to synthesize novel electrode materials for lithium‐ion batteries (LIBs), because not only the compositions can be specifically designed to achieve higher battery performances, but also the materials can be deposited on various substrates for different purposes. Herein, a novel design of active material/electrolyte mixture electrode, i.e., titanium dioxide/lithium phosphate (TLPO) nanocomposite, has been successfully developed by ALD and deposited on carbon nanotube substrates (CNTs@TLPO) at 250 °C, by combining the ALD recipes of TiO 2 and lithium phosphate (LPO). In the nanocomposite, TiO 2 forms anatase nanocrystals, embedded in a matrix of amorphous lithium phosphate. CNTs@TLPO has been examined as an anode material for LIBs, exhibiting a similar electrochemical response as anatase TiO 2 in the cyclic voltammetry testing. CNTs@TLPO presents an outstanding capacity of 204 mA h g −1 upon 200 cycles in charge and discharge cycling measurements, as well as a significantly improved rate capability compared with ALD deposited TiO 2 on CNTs without LPO ALD cycles. This work shows that the in situ addition of solid‐state electrolyte (e.g., lithium phosphate), which introduces higher Li + ionic conductivity, is an efficient way to achieve high‐performance electrode materials for LIBs by ALD.