Open AccessSolvothermal synthesis method for dual-phase Li4Ti5O12/TiO2 composites for high-stability lithium storage
Author(s) -
Yuqing Zhang,
Min Zeng,
Xin Wu,
Yuan Bai,
Jing Li
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab653a
Subject(s) - materials science , anode , lithium titanate , titanate , lithium (medication) , electrochemistry , hydroxide , phase (matter) , diffusion , chemical engineering , ion , conductivity , composite material , lithium ion battery , electrode , battery (electricity) , ceramic , organic chemistry , chemistry , medicine , power (physics) , physics , quantum mechanics , engineering , thermodynamics , endocrinology
As a promising anode material, lithium titanate (Li 4 Ti 5 O 12 ) displays extremely stable cycling and high safety performance. Nevertheless, its application is hindered because of a low electron conductivity and low specific capacity. Herein, dual-phase Li 4 Ti 5 O 12 /TiO 2 (LTO/TO) was synthesized by a straightforward solvothermal method utilizing crystallized water of lithium hydroxide to hydrolyse tetrabutyl titanate at high temperature and pressure conditions. This work demonstrated that LTO/TO composites have excellent electrochemical performance and indicated that the inherent defects of LTO can be improved by the decoration of TO. At a current density of 1.0 A g −1 (∼6 C), the discharge capacity of LTO/TO sample reached 197 mAh g −1 after 100 cycles, while LTO exhibited 180 mAh g −1 . It appears that nanostructure LTO/TO composites may shorten the diffusion distance of electrons and lithium ions.