期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 9, 页码 6072-6081出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b12586
关键词
aerogel; cassava; graphene; hierarchically porous; lithium sulfur battery
资金
- China Postdoctoral Science Foundation [2015M570686]
- National Natural Science Foundation of China [51404304, 51574288]
- Natural Science Foundation of Hunan Province [14JJ2001]
- Fundamental Research Funds for the Central Universities of Central South University [2015zzts186]
Hierarchically porous carbon/graphene aerogel (CGA) with relatively high surface area and pore volume is synthesized through an efficient fabrication strategy, which involves forming hydrothermal carbon layer on the pore wall as upholder and directly carbonizing the wet hydrogel from hydrothermal reaction, without using any special drying techniques. Cassava powder is used as carbon precursor which enables sustainable synthesis. Carbonizing the wet hydrothermal product is found to be a self-activation process, through which abundant pores are generated. The aerogel is used as host to encapsulate sulfur for lithium sulfur battery. Graphene, served as highly conductive scaffold, accelerates the transport of the electrons. The hierarchically porous structure is in favor of improving the electrochemical performance of lithium sulfur battery. Therefore, the cathode with high sulfur loading and high sulfur content can deliver very good performance.
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