Volume 18, Issue 41 2203948
Research Article

Boosting Charge Transfer Via Heterostructure Engineering of Ti2CTx/Na2Ti3O7 Nanobelts Array for Superior Sodium Storage Performance

Wenqing Wang

Wenqing Wang

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

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Shu-ang He

Shu-ang He

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

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Zhe Cui

Zhe Cui

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

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Qian Liu

Corresponding Author

Qian Liu

College of Science, Donghua University, Shanghai, 201620 P. R. China

E-mail:[email protected][email protected]

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Muk Fung Yuen

Muk Fung Yuen

School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172 P. R. China

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Jinqi Zhu

Jinqi Zhu

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

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Hao Wang

Hao Wang

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

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Mengluan Gao

Mengluan Gao

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

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Wei Luo

Wei Luo

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

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Junqing Hu

Junqing Hu

College of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen, 518118 P. R. China

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Rujia Zou

Corresponding Author

Rujia Zou

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 P. R. China

E-mail:[email protected][email protected]

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First published: 09 September 2022
Citations: 7

Abstract

The poor conductivity, inert charge transmission efficiency, and irreversible Na+ trapping of Na2Ti3O7 result in retardant electrons/ions transportation and deficient sodium-ion storage efficiency, leading to sluggish reaction kinetics. To address these issues, an urchin-like Ti2CTx/Na2Ti3O7 (Ti2C/NTO) heterostructure sphere consisting of Ti2C/NTO heterostructure nanobelts array is developed via a facile one-step in situ hydrothermal strategy. The Ti2C/NTO heterostructure can obviously decrease Na+ diffusion barriers and increase electronic conductivity to improve reaction kinetics due to the built-in electric field effect and high-quantity interface region. In addition, the urchin-like vertically aligned nanobelts can reduce the diffusion distance of electrons and ions, provide favored electrolyte infiltration, adapt large volume expansion, and mitigate the aggregation to maintain structural stability during cycles, further enhancing the reaction kinetics. Furthermore, the Ti2C/NTO heterostructure can effectively suppress many unwanted side reactions between reactive surface sites of NTO and electrolyte as well as irreversible trapping of Na+. As a result, systematic electrochemical investigations demonstrate that the Ti2C/NTO heterostructure as an anode material for record sodium-ion storage delivers the highest reversible capacity, the best cycling stability with 0.0065% decay rate for 4500 cycles at 2.0 A g–1, and excellent rate capability of 172.1 mAh g–1 at 10.0 A g–1.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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