Carbon-bonded, oxygen-deficient TiO2 nanotubes with hybridized phases for superior Na-ion storage

Zhao, Chuanyong1; Cai, Yi1; Yin, Kaili1; Li, Haizhao2,3; Shen, Dong4,5; Qin, Ning6; Lu, Zhouguang6; Liu, Chaoping7; Wang, Hong-En1

2018-10-15

10.1016/j.cej.2018.05.194

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

1873-3212

TiO2 shows great potential as anode materials for sodium-ion batteries (SIBs). However, its practical application has been deferred by the sluggish electronic/ionic transport. In this work, we report the controlled synthesis of ultrathin, carbon-bonded TiO2 nanotubes with oxygen vacancies (V-o) and hybridized amorphous/TiO2(B) phases via a hydrothermal reaction and heat-treatment. The introduction of V-o and carbon in TiO2 by C-Ti bonding effectively boosts its electron transport. Meantime, the ultrathin TiO2 nanotubes (with diameter of similar to 10 nm and tube thickness of similar to 3 nm) enable a large electrode/electrolyte contact interface with shortened Na+ diffusion distance. In addition, the formed coherent amorphous/TiO2(B) junctions further promote the charge transport and transfer at heterointerface. These synergic effects endow the resultant TiO2 material with superior Na+ storage capability in terms of high capacity (191 mA h/g at 0.2 C) and rate property (141 mA h/g at 10 C). Kinetics analysis further discloses a pseudocapacitive Na+ storage exerts a significant contribution to the total capacity. The proposed strategy based on synergic engineering of vacancy defects, chemical bonding and phase composition can pave the way for exploration of novel electrode materials for beyond lithium-ion batteries.

Titanium dioxide Oxygen vacancy Chemical bonding Sodium-ion batteries Pseudocapacitance

SCI ; EI

英语

其他

Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20170412153139454]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000437093000021

ELSEVIER SCIENCE SA

20182605360027

Amorphous carbon ; Anodes ; Chemical bonds ; Electron transport properties ; Hydrothermal synthesis ; Lithium-ion batteries ; Metal ions ; Nanotubes ; Sodium compounds ; Sodium-ion batteries ; Storage (materials) ; Titanium dioxide ; Yarn

Metallurgy:531.1 ; Storage:694.4 ; Electron Tubes:714.1 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Fiber Products:819.4 ; Crystalline Solids:933.1 ; Amorphous Solids:933.2

ENGINEERING

Web of Science

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2.Wuhan Univ Technol, Hubei Key Lab Adv Technol Automot Components, Wuhan 430070, Hubei, Peoples R China
3.Wuhan Univ Technol, Hubei Collaborat Innovat Ctr Automot Components T, Wuhan 430070, Hubei, Peoples R China
4.City Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China
5.City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Hong Kong, Hong Kong, Peoples R China
6.Southern Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen, Peoples R China
7.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Hong Kong, Peoples R China

Zhao, Chuanyong,Cai, Yi,Yin, Kaili,et al. Carbon-bonded, oxygen-deficient TiO2 nanotubes with hybridized phases for superior Na-ion storage[J]. CHEMICAL ENGINEERING JOURNAL,2018,350:201-208.

Zhao, Chuanyong.,Cai, Yi.,Yin, Kaili.,Li, Haizhao.,Shen, Dong.,...&Wang, Hong-En.(2018).Carbon-bonded, oxygen-deficient TiO2 nanotubes with hybridized phases for superior Na-ion storage.CHEMICAL ENGINEERING JOURNAL,350,201-208.

Zhao, Chuanyong,et al."Carbon-bonded, oxygen-deficient TiO2 nanotubes with hybridized phases for superior Na-ion storage".CHEMICAL ENGINEERING JOURNAL 350(2018):201-208.