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Facile Fabrication of Free-Standing and Flexible Anodes Composed of Entangled N-Doped Carbon Nanotubes for Application in Lithium Ion Batteries

Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China

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Xinxin Wang

Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China

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Jingjing Chen

Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, P. R. China

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Zehua Liu

Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, P. R. China

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Zhiyong Mao

Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China

E-mail Address: mzhy1984@163.com

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, and

Dajian Wang

Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, P. R. China

E-mail Address: djwang@tjut.edu.cn

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https://doi.org/10.1142/S1793292021500119Cited by:2 (Source: Crossref)

Abstract

In this work, innate free-standing and flexible anode composed of entangled N-doped carbon nanotubes (CNTs) is fabricated by a facile annealing method following a simple compression without needing any tedious processing operations. The well cross-linked CNTs of the resultant free-standing anode enable robust diffusion channels for lithium ions and high flexibility. Served as the anode in lithium-ion batteries (LIBs) without the utilization of binder and current collector, the fabricated free-standing electrode can deliver a reversible area capacity of 2.14mAhcm $^{- 2}$ $^{- 2}$ at 1mAcm $^{- 2}$ $^{- 2}$ with superior cycling stability and excellent rate capability. The obtained reversible area capacity for the fabricated free-standing electrode material is much higher than that of the commercial graphite anode ( $\sim 0.6$ $\sim 0.6$ mAhcm $^{- 2}$ $^{- 2}$ at 1mAcm $^{- 2}$ $^{- 2}$ ). Furthermore, the assembled full flexible battery utilizing the fabricated free-standing electrode also exhibits attractive performance and can substantially supply power for an electronic watch at flat and 180^∘ bending positions, indicating the promising application in flexible electronic devices.

Keywords:

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