Journal
RSC ADVANCES
Volume 5, Issue 116, Pages 96146-96150Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra19000b
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Funding
- National Program on Key Basic Research Project of China (973 Program) [2013CB127804]
- Fundamental Research Funds for the Central Universities [SWU 113079, XDJK2014C051]
- Specialized Research Fund for the Doctoral Program of Higher Education (RFDP) [20130182120025]
- Young Core Teacher Program of the Municipal Higher Educational Institution of Chongqing
- Chongqing Natural Science Foundation [cstc2015jcyjA50031]
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A composite of selenium (Se) and a rich porous carbon material (PCM) with mesopores from silk cocoons is explored as a cathode for lithium-selenium (Li-Se) batteries for the first time. Elemental selenium is homogeneously dispersed inside the mesopores of the PCM by a melt-diffusion method based on several analyses. The synthetic PCM/Se composite can effectively suppress the dissolution of the active material and maintain mechanical stability. In the case of Li-Se batteries, it delivers a reversible capacity of more than 230 mA h g(-1) after 510 cycles at 2C. The remarkable electrochemical performance may benefit from the favorable conductivity and the porous structure of the carbon material as the host matrix.
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