点击次数：

论文类型：期刊论文

发表时间：2018-02-21

发表刊物：NEW JOURNAL OF CHEMISTRY

收录刊物：SCIE

卷号：42

期号：4

页面范围：2483-2490

ISSN号：1144-0546

摘要：Designing a rational accommodating host for sulfur is in great demand for the commercial application of lithium-sulfur batteries. Herein, a 2D graphene-based microporous carbon substrate (I-GPC) with a high conductivity and diverse porous structure was designed via an ionothermal method combined with an activation process. The resultant I-GPC has a specific area as high as 1740.1 m(2) g(-1) and a hierarchical microporous structure consisting of both smaller micropores (<0.69 nm) and larger micropores (0.8 and 1.2 nm). The S/I-GPC composite presents an excellent electrochemical performance with a high initial discharge capacity up to 1510 mA h g(-1) at 0.1C and an impressive cycling stability of 625.8 mA h g(-1) after 150 cycles at 1C. The remarkable electrochemical performances are primarily attributed to the diverse microporous structure of I-GPC with high conductivity. The ionothermal method and rational design of the carbon material provide us with new opportunities for the development of other energy storage systems.