气凝胶
材料科学
石墨烯
碳化
硫黄
碳纤维
化学工程
水热碳化
锂硫电池
超级电容器
热液循环
多孔性
制作
锂(药物)
电池(电)
阴极
电化学
纳米技术
电极
复合材料
扫描电子显微镜
复合数
化学
医学
功率(物理)
冶金
量子力学
替代医学
物理化学
病理
物理
内分泌学
工程类
作者
Kai Zhang,Yanqing Lai,Jie Li,Xiaoke Lei,Mengran Wang,Hai Lu,Jing Fang
标识
DOI:10.1021/acsami.5b12586
摘要
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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