Selenium-Infused Ordered Mesoporous Carbon for Room-Temperature All-Solid-State Lithium-Selenium Batteries with Ultrastable Cyclability

Qiang Zhang; Liangting Cai; Gaozhan Liu; Qihua Li; Miao Jiang; Xiayin Yao

doi:10.1021/acsami.0c01996

Selenium-Infused Ordered Mesoporous Carbon for Room-Temperature All-Solid-State Lithium-Selenium Batteries with Ultrastable Cyclability

ACS Appl Mater Interfaces. 2020 Apr 8;12(14):16541-16547. doi: 10.1021/acsami.0c01996. Epub 2020 Mar 30.

Authors

Qiang Zhang^{1

2}, Liangting Cai¹, Gaozhan Liu^{1

2}, Qihua Li¹, Miao Jiang^{1

2}, Xiayin Yao^{1

2}

Affiliations

¹ Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China.
² Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.

PMID: 32191425
DOI: 10.1021/acsami.0c01996

Abstract

Selenium with a similar reaction mechanism with sulfur and a much higher electronic conductivity is considered to be a promising cathode for all-solid-state rechargeable batteries. Herein, selenium-infused ordered mesoporous carbon composites (Se/CMK-3) are successfully prepared by a melt-diffusion method from a ball-milled mixture of Se and CMK-3 (Se-CMK-3). Furthermore, their electrochemical performances are evaluated in all-solid-state lithium-selenium batteries at room temperature. Typically, Li/75%Li₂S-24%P₂S₅-1%P₂O₅/Li₁₀GeP₂S₁₂/Se/CMK-3 all-solid-state lithium-selenium batteries exhibit high reversible capacity of 488.7 mAh g^-1 at 0.05 C after 100 cycles. Even being cycled at 0.5C, it still maintains a discharge capacity of 268.7 mAh g^-1 after 200 cycles. The excellent electrochemical performances could be attributed to the enhanced electronic/ionic conductivities and structural integrity with the addition of the CMK-3 matrix.

Keywords: Se/CMK-3 composite; all-solid-state lithium−selenium battery; cyclic performance; electronic/ionic conduction; structural stability.