AI Article Synopsis
- Researchers created hybrid nanostructures combining an onion-like carbon core and MoS2 nanoleaves using a solvothermal method and thermal annealing.
- These MoS2/OLC nanocomposites showed improved electrochemical capabilities as lithium-ion battery anodes, achieving a specific capacity of 853 mA h g(-1) after 60 cycles, and a 71.1% initial coulombic efficiency.
- A novel pre-lithiation method significantly boosted the coulombic efficiency to 97.6% in the first cycle, suggesting potential applications for similar techniques in developing advanced lithium-ion batteries.
Article Abstract
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.
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| http://dx.doi.org/10.1039/c4nr01553c | DOI Listing |
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