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Selenium-Infused Ordered Mesoporous Carbon for Room-Temperature All-Solid-State Lithium-Selenium Batteries with
Qiang Zhang1,2, Liangting Cai1, Gaozhan Liu1,2
1Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China.
ACS Applied Materials & Interfaces
|March 20, 2020
Summary
Selenium-infused ordered mesoporous carbon composites (Se/CMK-3) show promise for all-solid-state lithium-selenium batteries. These composites offer high capacity and stability, advancing battery technology.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Selenium is a promising cathode material for all-solid-state batteries due to its high electronic conductivity.
- Developing stable and high-performance selenium-based cathodes remains a challenge.
Purpose of the Study:
- To prepare selenium-infused ordered mesoporous carbon composites (Se/CMK-3).
- To evaluate the electrochemical performance of Se/CMK-3 in all-solid-state lithium-selenium batteries.
Main Methods:
- Melt-diffusion method using ball-milled Se and CMK-3.
- Fabrication of all-solid-state lithium-selenium batteries with a Li10GeP2S12 solid electrolyte.
- Electrochemical performance testing at room temperature.
Main Results:
- Se/CMK-3 composites demonstrated high reversible capacity (488.7 mAh g⁻¹ at 0.05 C after 100 cycles).
- Excellent cycling stability was observed, with 268.7 mAh g⁻¹ maintained at 0.5 C after 200 cycles.
- Enhanced electronic/ionic conductivities and structural integrity contributed to the superior performance.
Conclusions:
- Se/CMK-3 composites are effective cathode materials for all-solid-state lithium-selenium batteries.
- The CMK-3 matrix enhances conductivity and structural stability, leading to improved battery performance.
- This work presents a viable strategy for developing high-performance selenium-based all-solid-state batteries.
