期刊
CHINESE JOURNAL OF CHEMISTRY
卷 35, 期 6, 页码 861-866出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.201600785
关键词
activated carbon; lithium ion capacitor; rice husk; biomass utilization; organic electrolyte
资金
- National Natural Science Foundation of China [91434118, 21601176]
- National Natural Science Foundation for Creative Research Group [21521092]
- External Cooperation Program of BIC, Chinese Academy of Sciences [121522KYS820150009]
- Hundred Talents Program of the Chinese Academy of Sciences
- Jilin Provincial Science and Technology Development Program of China [20160520002JH]
Biomass-derived activated carbon electrode materials have been synthesized by carbonization and KOH activation processes from an agriculture waste - rice husk, composed of organic compound and silica. The surface area of activated carbon reached 1098.1 m(2)/g mainly including mesopores and macropores due to the template effect of silica in rice husk. Owing to the existence of mesopores and macropores, the as-obtained activated carbon materials can be used in aqueous supercapacitors, lithium-ion (Li-ion) capacitors and lithium-sulfur (Li-S) batteries. In KOH electrolyte, fast rate performance (as high as 2 V/s) was obtained due to the existence of ideal electrical double layer capacitance. In organic electrolyte, high voltage (2.5 V) was achieved. Activated carbon electrode for Li-ion capacitor also showed capacity of 17 mAh/g at 100 mA/g with the high voltage range of 2.5 V. The capacities of sulfur- activated carbon in Li-S batteries were 1230 and 970 mAh/g at the current densities of 0.1 and 0.2 C. The present results showed that activated carbon materials with mesopores were good host to immobilize polysulfides.
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