Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University, Shanghai, 200241, P. R. China.
Nanoscale. 2016 Jan 7;8(1):420-30. doi: 10.1039/c5nr05595d.
A one-step hydrothermal method was successfully used to fabricate hollow microsphere@onion-like solid nanosphere MoS2. Then the as-prepared sS-MoS2 was decorated with a carbon shell using dopamine as a carbon source by a facile route, resulting in hollow microsphere@onion-like solid nanosphere MoS2 decorated with carbon shell (sS-MoS2@C). A synergistic effect was observed for the two-component material, leading to new electrochemical processes for lithium storage, with improved electroconductivity and structural soundness, triggering an ascending capacity upon cycling. The as-prepared sS-MoS2@C exhibits optimized electrochemical behaviour with high specific capacity (1107 mA h g(-1) at 100 mA g(-1)), superior high-rate capability (805 mA h g(-1) at 5000 mA g(-1)) and good cycling stability (91.5% of capacity retained after 100 cycles), suggesting its potential application in high-energy lithium-ion batteries.
一步水热法成功制备了空心微球@洋葱状固溶体纳米球 MoS2。然后，通过简便的方法，以多巴胺为碳源，在制备的 sS-MoS2 上修饰了一层碳壳，得到了空心微球@洋葱状固溶体纳米球 MoS2 修饰的碳壳（sS-MoS2@C）。观察到两种组分材料的协同效应，为锂存储带来了新的电化学过程，提高了电导率和结构稳定性，循环过程中容量上升。所制备的 sS-MoS2@C 表现出优化的电化学性能，具有高比容量（在 100 mA g-1 时为 1107 mA h g-1）、优异的高倍率性能（在 5000 mA g-1 时为 805 mA h g-1）和良好的循环稳定性（循环 100 次后容量保持率为 91.5%），表明其在高能锂离子电池中有潜在的应用。
