Nb-doped rutile TiO₂: a potential anode material for Na-ion battery

ACS Applied Materials & Interfaces
Hiroyuki UsuiHiroki Sakaguchi

Abstract

The electrochemical properties of the rutile-type TiO2 and Nb-doped TiO2 were investigated for the first time as Na-ion battery anodes. Ti(1-x)Nb(x)O2 thick-film electrodes without a binder and a conductive additive were prepared using a sol-gel method followed by a gas-deposition method. The TiO2 electrode showed reversible reactions of Na insertion/extraction accompanied by expansion/contraction of the TiO2 lattice. Among the Ti(1-x)Nb(x)O2 electrodes with x = 0-0.18, the Ti(0.94)Nb(0.06)O2 electrode exhibited the best cycling performance, with a reversible capacity of 160 mA h g(-1) at the 50th cycle. As the Li-ion battery anode, this electrode also attained an excellent rate capability, with a capacity of 120 mA h g(-1) even at the high current density of 16.75 A g(-1) (50C). The improvements in the performances are attributed to a 3 orders of magnitude higher electronic conductivity of Ti(0.94)Nb(0.06)O2 compared to that of TiO2. This offers the possibility of Nb-doped rutile TiO2 as a Na-ion battery anode as well as a Li-ion battery anode.

References

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Citations

May 3, 2016·Advanced Energy Materials·Muhammad Nawaz TahirStefano Passerini
Dec 1, 2015·ACS Applied Materials & Interfaces·Juan ZhangYu-Guo Guo
Mar 24, 2016·ACS Applied Materials & Interfaces·Jun ChenXiaobo Ji
May 29, 2015·Physical Chemistry Chemical Physics : PCCP·Yan ZhangXiaobo Ji
Jun 4, 2016·ACS Applied Materials & Interfaces·Baofeng WangZhenguo Huang
Nov 1, 2016·Physical Chemistry Chemical Physics : PCCP·Changsheng DingRika Hagiwara
Jan 26, 2017·ACS Applied Materials & Interfaces·Hanna HeHaiyan Wang
Feb 23, 2017·Chemistry : a European Journal·Tongbin LanMingdeng Wei
Dec 29, 2016·ACS Applied Materials & Interfaces·Seung Mi OhSeong-Ju Hwang
Apr 4, 2019·Physical Chemistry Chemical Physics : PCCP·Song-Hyok ChoeSong-Nam Hong
Jul 31, 2020·Chemical Communications : Chem Comm·Kotaro FujiiMasatomo Yashima
Mar 30, 2017·Chemical Society Reviews·Jang-Yeon HwangYang-Kook Sun
Dec 21, 2017·Chemical Communications : Chem Comm·Weifeng ZhangMingdeng Wei
Jun 29, 2018·Chemical Reviews·Jia DingDavid Mitlin
Dec 13, 2017·ACS Applied Materials & Interfaces·Yong-Seok ChoiJae-Chul Lee
Dec 8, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Xue-Zhong LiYing Xie

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