Journal
MICRO & NANO LETTERS
Volume 13, Issue 10, Pages 1386-1389Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/mnl.2018.5154
Keywords
selenium; electrochemical electrodes; composite materials; nanofabrication; porous materials; secondary cells; carbon; lithium compounds; lithium; carbon; selenium composite; cathode materials; lithium ion battery; lithium-selenium battery; hydrothermal treated chitosan; lithium storage; hydrothermal carbonisation; Li-Se battery cathode; temperature 600; 0 degC; Co; Li-Se
Funding
- Scientific Start Foundation of LongYan University [LB2014001]
- Provincial Science and Technology Department for Provincial Colleges and Universities Program [JK2015047]
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Seeking for the porous carbon with suitable structure and morphology has been a key to improve the lithium storage performance of carbon/selenium composite. In this work, the hierarchical porous N,O Co-doped carbon has been prepared by an initial hydrothermal carbonisation and subsequent activation route using the chitosan as raw material. The carbon obtained at 600 degrees C possessing primary micropores and surface macropores presents high specific surface area (809. 3 m(2) g(-1)) and low porous size, and the selenium with amorphous structure is uniformly encapsulated into the micropores of this carbon to form carbon/selenium composite. As the cathode materials of lithium ion battery, this composite delivers a discharge capacity of 446.9 mAh g(-1) at rate of 0.24 C after 100 cycles. At a high rate of 4.8 C, this composite still shows a stable discharge capacity of 342.8 mAh g(-1). These results suggest that this composite may be promising for practical applications for lithium-selenium battery.
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