Journal
SMALL METHODS
Volume 3, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.201800287
Keywords
3D porous; lithium-ion batteries; Mo2C; nanodots; N-doped CNTs
Funding
- National Natural Science Foundation of China [21773024, 51372033]
- National High Technology Research and Development Program of China [2015AA034202]
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For the first time, red-blood-cell-like porous Mo2C@CNT microspheres are synthesized through a facile and scalable spray-drying approach. As an anode for the lithium-ion (Li-ion) battery (LIB), the Mo2C@CNT hybrid demonstrates superior electrochemical performances with a high reversible capacity of 1065 mAh g(-1) after 100 cycles at 0.1 A g(-1), a large and stable capacity of 878 mAh g(-1) even after 750 cycles at 1.6 A g(-1), and large capabilities of 460 and 190 mAh g(-1) after 100 cycles even at 8.0 and 16.0 A g(-1), respectively, suggesting the outstanding long-cycle high-rate performance. The superior Li-ion storage is attributed to the unique porous hierarchical structure, as constructed with Mo2C nanodots homogeneously and tightly anchored on a porous and highly conductive N-doped carbon nanotubes (CNTs) microspheric skeleton, which provides abundant electrochemically active sites and facilitates the electron and ion transportation. This work provides a novel, scalable, and cost-effective route to the hybrid of transition-metal-based compounds and carbonaceous nanomaterials as high-performance electrode for LIBs.
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