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Construction of 1T‐MoSe 2 /TiC@C Branch–Core Arrays as Advanced Anodes for Enhanced Sodium Ion Storage
Author(s) -
Zhang Yan,
Deng Shengjue,
Shen Yanbin,
Liu Bo,
Pan Guoxiang,
Liu Qi,
Wang Xiuli,
Wang Yadong,
Xia Xinhui,
Tu Jiangping
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201902565
Subject(s) - materials science , anode , annealing (glass) , chemical vapor deposition , nanorod , electrochemistry , chemical engineering , nanowire , electrode , nanotechnology , fabrication , electrical conductor , conductivity , composite material , chemistry , alternative medicine , pathology , engineering , medicine
The use of active sites and reaction kinetics of MoSe 2 anodes for sodium ion batteries (SIBs) are highly related to the phase components (1T and 2H phases) and electrode architecture. This study concerns the design and fabrication of wrinkled 1T‐MoSe 2 nanoflakes anchored on highly conductive TiC@C nanorods to form 1T‐MoSe 2 /TiC@C branch–core arrays by a powerful chemical vapor deposition (CVD)–solvothermal method. The 1T‐MoSe 2 branch can be easily transformed into its 2H‐MoSe 2 counterpart after a facile annealing process. In comparison to 2H‐MoSe 2 , 1T‐MoSe 2 has larger interlayer spacing and higher electronic conductivity, which are beneficial for the acceleration of reaction kinetics and capacity improvement. In addition, direct growth of 1T‐MoSe 2 nanoflakes on the TiC@C skeleton not only enhance the electrical conductivity, but also contribute to reinforced structural stability. Accordingly, 1T‐MoSe 2 /TiC@C branch–core arrays are demonstrated with higher capacity and better rate performance (184 mAh g −1 at 10 A g −1 ) and impressive durability over 500 cycles with a capacity retention of approximately 91.8 %. This phase modulation plus branch–core design provides a general method for the synthesis of other high‐performance electrode materials for application in electrochemical energy storage.