期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 23, 期 2, 页码 565-572出版社
SPRINGER
DOI: 10.1007/s10008-018-4163-0
关键词
Lithium ion battery; Three-dimensionally (3D) ordered macroporous carbon (3DOMC); TiO2; 3DOMC hybrid; Good conductivity; Intense electrostatic attraction
资金
- Program for the Outstanding Young Talents of Hebei Province
- Scientific Research Foundation for Selected Overseas Chinese Scholars, Ministry of Human Resources and Social Security of China [CG2015003002]
A three-dimensionally (3D) ordered macro/mesoporous carbon (3DOMC) is synthesized by one-step template method as a TiO2 supporter, and this TiO2/3DOMC hybrid plays the role of immobilizers and can limit any polysulfides from escaping the cathode. The TiO2/3DOMC exhibits high pore volume and specific surface area, accommodating up to 73.2wt% in sulfur content. As a sulfur host, S/TiO2/3DOMC composite was able to delivered 1105mAhg(-1) on first discharge and 695mAhg(-1) after 150 cycles at a current rate of 0.5C. Even though at 2C this material was able to keep a capacity of 551mAhg(-1). We attribute the superior performance to the good conductivity and structural restriction of carbon and the intense electrostatic attraction between metal-oxygen bond and polysulfides to encapsulate sulfur of the TiO2/3DOMC.
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