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Published on: November 11, 2013
Mesoporous Thin-Wall Molybdenum Nitride for Fast and Stable Na/Li Storage
Guangshen Jiang1, Yuqian Qiu1, Qiongqiong Lu2
1State Key Laboratory of Solidification Processing, Centre for Nano Energy Materials, School of Materials Science and Engineering, Shaanxi Joint Laboratory of Graphene (NPU) , Northwestern Polytechnical University , Xi'an 710072 , P. R. China.
Researchers developed mesoporous molybdenum nitride (meso-Mo2N) anodes for faster sodium-ion batteries (SIBs). This 3D structure enhances ion diffusion and conductivity, enabling rapid charging and sustained energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Sluggish kinetics in sodium-ion batteries (SIBs) hinder fast-charging capabilities.
- Poor ion diffusion and low conductivity of electrode materials are key limitations.
Purpose of the Study:
- To develop advanced anode materials for high-performance SIBs.
- To improve rate performance and charge/discharge speeds in SIBs.
Main Methods:
- Fabrication of mesoporous, conductive, 3D molybdenum nitride (meso-Mo2N) skeletons.
- Electrochemical characterization including cyclic voltammetry and galvanostatic intermittent titration.
Main Results:
- Meso-Mo2N anodes exhibit enhanced Na+ ion diffusion and electron migration due to mesoporous channels and thin walls.
- Achieved a specific capacity of 158 mAh g-1 at 1 A g-1 after 1000 cycles, outperforming nonporous Mo2N.
- Demonstrated potential for enhanced lithium storage.
Conclusions:
- The 3D mesoporous structure of meso-Mo2N significantly boosts SIB performance.
- This design strategy is promising for fast-charging, high-performance sodium and lithium storage devices.
