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Title of article :
A mesoporous carbon–sulfur composite as cathode material for high rate lithium sulfur batteries
Author/Authors :
Choi، نويسنده , , Hyunji and Zhao، نويسنده , , Xiaohui and Kim، نويسنده , , Dul-Sun and Ahn، نويسنده , , Hyo-Jun and Kim، نويسنده , , Ki-Won and Cho، نويسنده , , Kwon-Koo and Ahn، نويسنده , , Jou-Hyeon، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
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Abstract :
Sulfur composite was prepared by encapsulating sulfur into CMK-3 mesoporous carbon with different heating times and then used as the cathode material for lithium sulfur batteries. Thermal treatment at 300 °C plays an important role in the sulfur encapsulation process. With 20 h of heating time, a portion of sulfur remained on the surface of carbon, whereas with 60 h of heating time, sulfur is confined deeply in the small pores of carbon that cannot be fully exploited in the redox reaction, thus causing low capacity. The S/CMK-3 composite with thermal treatment for 40 h at 300 °C contained 51.3 wt.% sulfur and delivered a high initial capacity of 1375 mA h g−1 at 0.1 C. Moreover, it showed good capacity retention of 704 mA h g−1 at 0.1 C and 578 mA h g−1 at 2 C even after 100 cycles, which proves its potential as a cathode material for high capability lithium sulfur batteries.
Keywords :
A. Composite , B. Chemical synthesis , C. electrochemical measurements , D. Electrochemical properties , D. Energy storage
Journal title :
Materials Research Bulletin
Journal title :
Materials Research Bulletin
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