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The Synergetic Effect of Inorganic and Organic Compounds Hydrolyzed by Tetrabutyl Titanate on Improving Dispersion and Electrochemical Performance of Li 4 Ti 5 O 12 Anode Material
Author(s) -
Zhang Yanhua,
Fan Weifeng,
Li Xuan,
Qiao Yingjun,
Hu Yuxin,
Li Wanpeng,
Qu Meizhen,
Peng Gongchang,
Xie Zhengwei
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002217
Subject(s) - anode , materials science , electrochemistry , dispersion (optics) , x ray photoelectron spectroscopy , titanate , chemical engineering , spinel , scanning electron microscope , transmission electron microscopy , fourier transform infrared spectroscopy , inorganic chemistry , electrode , nanotechnology , ceramic , chemistry , composite material , optics , metallurgy , physics , engineering
Spinel Li 4 Ti 5 O 12 (LTO) with small particle size has the problem of easy agglomeration, which seriously worsens electrochemical performance but hasn't been yet attracted enough attention. This is one of the biggest challenges in the practical application of LTO. Herein, LTO is modified with tetrabutyl titanate (TBT) to generate inorganic‐organic wrapped LTO anode under simple hydrolysis process. The X‐ray diffraction, fourier transformation infrared spectrum, scanning electron microscopy, transmission electron microscopy and X‐ray photoelectron spectroscopy results show the existence of modifying layer, which not only could promote dispersion, but also improve the electrochemical performance. The LTO modified with 0.5 wt.% TBT displays good dispersion with homogeneous particle size distribution and stable viscosity. Moreover, it exhibits excellent cycling properties over 200 cycles at 5 C (153.4 mAh g −1 ). These results are assigned to the synergetic effect of the inorganic and organic modifying layer, which could be beneficial to the dispersion and electrochemical performance.