Citation: Zixing Guan, Kaixiang Zou, Xiao Wang, Yuanfu Deng, Guohua Chen. The synergistic effect of P-doping and carbon coating for boosting electrochemical performance of TiO₂ nanospheres for sodium-ion batteries[J]. Chinese Chemical Letters, ;2021, 32(12): 3847-3851. doi: 10.1016/j.cclet.2021.05.013 shu

The synergistic effect of P-doping and carbon coating for boosting electrochemical performance of TiO₂ nanospheres for sodium-ion batteries

Zixing Guan ^a ,
Kaixiang Zou ^a ,
Xiao Wang ^a ,
Yuanfu Deng ^{a, b, *,} ,
Guohua Chen ^c

a.
The Key Laboratory of Fuel Cell for Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
b.
Electrochemical Energy Engineering Research Center of Guangdong Province, South China University of Technology, Guangzhou 510640, China
c.
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China

chyfdeng@scut.edu.cn

Received Date: 29 March 2021
Revised Date: 21 April 2021
Accepted Date: 10 May 2021
Available Online: 19 May 2021

Figures(5)

P-doping is an effective way to modulate the electronic structure and improve the Na⁺ diffusion kinetics of TiO₂, enabling enhanced electrochemical performance. However, it is a challenge to prepare TiO₂ with a high P-doping concentration starting from TiO₂ in a crystalline state. In this work, we design a novel two-step route for constructing a carbon-coated anatase P-doping TiO₂ nanospheres (denote as (P-AnTSS)@NC) with high P-doping concentration, by utilizing amorphous TiO₂ nanospheres with the ultra-high specific area as P-doping precursor firstly, and followed by carbon coating treatment. Experimental results demonstrate that P is successfully doped into the crystal lattice and carbon layer is well coated on the surface of TiO₂, with P-doping and carbon-coating contents of ~13.5 wt% and 10.4 wt%, respectively, which results in the enhanced pseudocapacitive behavior as well as favorable Na⁺ and electron transferring kinetics. The (P-AnTSS)@NC sample shows excellent rate and cycle performance, exhibiting specific capacities of 177 and 115 mAh/g at 0.1 and 1.0 A/g after 150 and 2000 cycles, respectively.
- TiO₂,
- Phosphorus-doping,
- Carbon coating layer,
- Anode material,
- Sodium-ion batteries
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

The synergistic effect of P-doping and carbon coating for boosting electrochemical performance of TiO2 nanospheres for sodium-ion batteries

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通讯作者: 陈斌, bchen63@163.com

The synergistic effect of P-doping and carbon coating for boosting electrochemical performance of TiO₂ nanospheres for sodium-ion batteries