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Статья

2D porous Nb <sub>4</sub> N <sub>5</sub> @Nb <sub>2</sub> C heterojunctions for high-performance Li-ion batteries

Jingsong WuHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaYunfeng GuanHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaKe LiSchool of Chemistry, Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and Bio-Engineering Research (AMBER) Centre, Trinity College Dublin, Dublin, Dublin 2, IrelandQun XieHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaZhiming WangHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaHui ZhuHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaQin ZhangHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaXuanke LiHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaGuanming YuanHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of ChinaYe CongHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
2021en
ABI

Аннотация

Abstract Constructing transition metal nitrides (TMNs) with a 2D porous structure is an effective strategy to alleviate their volume expansion and self-aggregation issues, eventually enhancing their electrochemical performance. However, very few studies have been reported up to now. Herein, 2D porous Nb 4 N 5 @Nb 2 C heterojunctions are successfully synthesized from Nb 2 C MXene precursor by employing a two-step nitridation method in NH 3 atmosphere. Owing to the abundant active sites, fast Li-ions diffusion paths, and sufficient buffer space for releasing volume expansion, 2D porous Nb 4 N 5 @Nb 2 C heterojunctions achieve high rate performance and excellent cycling stability, maintaining 109.2 mAh g −1 at 2 A g −1 after 800 cycles. This work provides a facile strategy for building 2D porous TMNs and their heterojunctions with excellent electrochemical performances.

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Идентификаторы

DOI
10.1088/2053-1583/ac40c5

Цитирования и источники

Цитирований: 2Использованных источников: 0
Показатели — AkademScholar