Pre-lithiation of onion-like carbon/MoS2 nano-urchin anodes for high-performance rechargeable lithium ion batteries.
Pre-lithiation of onion-like carbon/MoS2 nano-urchin anodes for high-performance rechargeable lithium ion batteries.
复制标题
DOI：
10.1039/c4nr01553c
复制
发表时间：
2014-07
期刊：
影响因子：
6.7
通讯作者：
Ye Wang;G. Xing;Z. Han;Yumeng Shi;J. Wong;Z. Huang;K. Ostrikov;H. Yang
中科院分区：
文献类型：
--
作者：
Ye Wang;G. Xing;Z. Han;Yumeng Shi;J. Wong;Z. Huang;K. Ostrikov;H. Yang
通过简单的溶剂热法和热退火处理合成了由球形洋葱状碳（OLC）核和MoS 2纳米叶组成的杂化海胆状纳米结构。与商用MoS 2粉末相比，MoS 2/OLC纳米复合材料作为锂离子电池（LIB）的负极材料表现出增强的电化学性能，在50 mA g（-1）的电流密度下，60次循环后的比容量为853 mA h g（-1），初始库仑效率为71.1%。此外，基于锂箔与MoS 2/OLC纳米海胆直接接触的简单预锂化方法用于在第一次放电/充电循环中实现97.6%的非常高的库仑效率，这与原始MoS 2/OLC纳米海胆的库仑效率相比高至少26%。这种预锂化方法可以推广到开发用于LIB阳极材料的其他碳-金属硫化物纳米杂化物。这些结果可能为下一代高性能LIB的发展开辟了一条新的途径。
Hybrid urchin-like nanostructures composed of a spherical onion-like carbon (OLC) core and MoS2 nanoleaves were synthesized by a simple solvothermal method followed by thermal annealing treatment. Compared to commercial MoS2 powder, MoS2/OLC nanocomposites exhibit enhanced electrochemical performance as anode materials of lithium-ion batteries (LIBs) with a specific capacity of 853 mA h g(-1) at a current density of 50 mA g(-1) after 60 cycles, and a moderate initial coulombic efficiency of 71.1%. Furthermore, a simple pre-lithiation method based on direct contact of lithium foil with MoS2/OLC nano-urchins was used to achieve a very high coulombic efficiency of 97.6% in the first discharge/charge cycle, which is at least 26% higher compared to that of pristine MoS2/OLC nano-urchins. This pre-lithiation method can be generalized to develop other carbon-metal sulfide nanohybrids for LIB anode materials. These results may open up a new avenue for the development of the next-generation high-performance LIBs.