In Situ Growth Enabling Ideal Graphene Encapsulation upon Mesocrystalline MTiO3 (M = Ni, Co, Fe) Nanorods for Stable Lithium Storage
In Situ Growth Enabling Ideal Graphene Encapsulation upon Mesocrystalline MTiO3 (M = Ni, Co, Fe) Nanorods for Stable Lithium Storage
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原位生长可在介晶 MTiO3(M = Ni、Co、Fe)纳米棒上实现理想的石墨烯封装,从而实现稳定的锂存储
DOI:
10.1021/acsenergylett.7b00018
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发表时间:
2017-02
影响因子:
22
通讯作者:
Huang Fuqiang
中科院分区:
文献类型:
--
作者:
Xu Jijian;Ding Wei;Zhao Wenli;Zhao Wei;Hong Zhanglian;Huang Fuqiang
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.
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