In Situ Synthesis of MoC1–x [email protected] Hybrids for Capacitive Lithium-Ion Storage
- Jie LinJie LinState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, P. R. ChinaMore by Jie Lin,
- Jijian XuJijian XuState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. ChinaMore by Jijian Xu,
- Wei Zhao*Wei Zhao*E-mail (W.Z.): [email protected]. Tel: +86 21 52411620.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. ChinaMore by Wei Zhao,
- Wujie DongWujie DongState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. ChinaState Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. ChinaMore by Wujie Dong,
- Ruizhe LiRuizhe LiState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, P. R. ChinaMore by Ruizhe Li,
- Zhichao ZhangZhichao ZhangState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. ChinaMore by Zhichao Zhang, and
- Fuqiang Huang*Fuqiang Huang*E-mail (F.H.): [email protected] Tel: +86 21 52411620.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. ChinaState Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. ChinaSuzhou Research Institute, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Taicang 215400, Jiangsu, P. R. ChinaMore by Fuqiang Huang
Abstract
In this study, in situ synthesis of carbon-coated MoC1–x nanodots anchored on nitrogen-doped carbon (MoC1–x@C) for lithium storage is reported. The obtained MoC1–x@C hybrids exhibit intriguing structural characteristics including ultrafine particle size (ca. 1.2 nm) of MoC1–x nanodots, porous structure of nitrogen-doped carbon matrix, and good robustness. When evaluated as anodes for lithium-ion batteries, the optimized MoC1–x@C sample demonstrates a superior specific capacity (1099.2 mA h g–1 at 0.1 A g–1) and good rate capability (369.1 mA h g–1 at 5 A g–1). The MoC1–x@C anode also presents remarkable cycling stability with a much higher specific capacity (657.9 mA h g–1) than that of commercial bulk MoC (91.4 mA h g–1) after 500 cycles at 1 A g–1. Kinetics analysis of the anodes reveals the charge storage mechanism, which demonstrates the existence of capacitive redox reactions occurring at the shallow surface of the MoC1–x nanodots and closely relating to the particle size. The outstanding electrochemical performance results from the synergistic effect of the elastic carbonaceous encapsulation to accommodate the huge volume expansion and the ultrafine MoC1–x nanodots to provide more reactive sites for capacitive lithium storage.
Cited By
This article is cited by 3 publications.
- Zhaoliang Shi, Qing Zhang, Liyun Zhao, Hua Wang, Wei Zhou. Inner-Stress-Optimized High-Density Fe3O4 Dots Embedded in Graphitic Carbon Layers with Enhanced Lithium Storage. ACS Applied Materials & Interfaces 2020, 12 (13) , 15043-15052. https://doi.org/10.1021/acsami.9b21592
- Xingxing Pan, Shuanglong Lu, Duo Zhang, Ye Zhang, Fang Duan, Han Zhu, Hongwei Gu, Shuao Wang, Mingliang Du. Atom-precise incorporation of platinum into ultrafine transition metal carbides for efficient synergetic electrochemical hydrogen evolution. Journal of Materials Chemistry A 2020, 8 (9) , 4911-4919. https://doi.org/10.1039/C9TA12613A
- Xiaojun Zhao, Dan Luo, Yan Wang, Zhi-Hong Liu. Reduced graphene oxide-supported CoP nanocrystals confined in porous nitrogen-doped carbon nanowire for highly enhanced lithium/sodium storage and hydrogen evolution reaction. Nano Research 2019, 12 (11) , 2872-2880. https://doi.org/10.1007/s12274-019-2529-y