Ilmenite-type MTiO3 (M = Ni, Co, Fe) with high theoretical specific capacity, wide availability, and low cost is a potential anode material for lithium storage, but its poor cycling stability is fatal. Here, we propose a general material design strategy to encapsulate MTiO3 nanorods with in situ grown few-layer graphene through a facile plasma-enhanced CVD route for stable lithium storage. Under the reductive plasma-enhanced CVD atmosphere, partially reduced Ni served as a self-catalysis substrate for in situ graphene growth, resulting in the perfect encapsulation of NiTiO3 nanorods with few-layer graphene. The graphene coating helps to retain the electrical connectivity during cycling, which is beneficial for better cycling performance and rate capability. Stable cycling (500 cycles at 0.2 A g-1; 83% capacity retention) is achieved with the NiTiO3@graphene nanorods.
Bibliographical noteFunding Information:
This work was financially supported by the National Key Research and Development Program (Grant No. 2016YFB0901600), NSF of China (Grant Nos. 61376056, 11404358), and the Science and Technology Commission of Shanghai (Grant No. 16JC1401700, 14520722000).
© 2017 American Chemical Society.
ASJC Scopus subject areas
- Chemistry (miscellaneous)
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Energy Engineering and Power Technology
- Materials Chemistry