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Mesoporous Spherical Li 4 Ti 5 O 12 as High‐Performance Anodes for Lithium‐Ion Batteries
Author(s) -
Du Guojun,
Liu Zhaolin,
Tay Siok Wei,
Liu Xiaogang,
Yu Aishui
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402224
Subject(s) - mesoporous material , materials science , anode , lithium (medication) , electrochemistry , chemical engineering , porosity , titanium , lithium titanate , ion , lithium ion battery , electrode , composite material , catalysis , battery (electricity) , chemistry , metallurgy , organic chemistry , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
Porous microspherical Li 4 Ti 5 O 12 aggregates (LTO‐PSA) can be successfully prepared by using porous spherical TiO 2 as a titanium source and lithium acetate as a lithium source followed by calcinations. The synthesized LTO‐PSA possess outstanding morphology, with nanosized, porous, and spherical distributions, that allow good electrochemical performances, including high reversible capacity, good cycling stability, and impressive rate capacity, to be achieved. The specific capacity of the LTO‐PSA at 30 C is as high as 141 mA h g −1 , whereas that of normal Li 4 Ti 5 O 12 powders prepared by a sol–gel method can only achieve 100 mA h g −1 . This improved rate performance can be ascribed to small Li 4 Ti 5 O 12 nanocrystallites, a three‐dimensional mesoporous structure, and enhanced ionic conductivity.