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Robust and Conductive Red MoSe2 for Stable and Fast Lithium Storage
Sanpei Zhang1,2, Gan Wang1,2, Jun Jin1
1CAS Key Laboratory of Materials for Energy Conversion , Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050 , People's Republic of China.
ACS Nano
|April 17, 2018
Summary
Researchers developed a new method to create conductive red molybdenum diselenide (MoSe2) nanosheets by modifying their electronic properties. This advancement enhances their performance in lithium storage and high-rate applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) layered transition-metal dichalcogenides (LTMDs) exhibit diverse crystal phases with unique symmetries, structures, and properties.
- Tailoring these phases offers a pathway to engineer material characteristics for specific applications.
Purpose of the Study:
- To demonstrate a novel approach for narrowing the band gap of molybdenum diselenide (MoSe2).
- To achieve a conductive red MoSe2 nanosheet with improved electronic properties.
Main Methods:
- Introducing a high valence state of molybdenum (Mo) species onto MoSe2 nanosheets.
- Constructing molybdenum-oxygen (Mo-O) bonds on the surface of MoSe2 nanosheets.
Main Results:
- Successfully modified the electronic properties of MoSe2 nanosheets.
- Significantly improved the conductivity of the MoSe2 nanosheets.
- Enhanced lithium storage capacity and high-rate capability due to improved conductivity.
Conclusions:
- The developed method yields a conductive red MoSe2 with a tunable band gap.
- This approach opens possibilities for exploring new crystal structures in LTMDs and other 2D materials.
- The enhanced properties are beneficial for energy storage applications.
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