新型炭材料2017，Vol.32Issue(4)：289-296,8.DOI:10.1016/S1872-5805(17)60123-9
一步硬模板法制备层次孔炭及其在锂硫电池中的应用
A one-step hard-templating method for the preparation of a hierarchical microporous-mesoporous carbon for lithium-sulfur batteries
摘要
Abstract
Porous carbon materials can increase the conductivity of sulfur and restrain the shuttling of polysulfides in the electro-lyte. A hierarchical microporous-mesoporous carbon ( HMMC) with a large surface area and pore volume was prepared by the sim-ple one-step carbonization of a mixture of magnesium gluconate ( MG) and phenolic resin. The MG was transformed into nanosize magnesium oxide that acted as a hard template during carbonization to create mesopores. The HMMC has a high surface area ( ~1560 m2·g-1) and large pore volume ( ~2. 6 cm3·g-1), which provides abundant space for sulfur loading and accommodates volume changes during charge/discharge. The interconnected pore structure and carbon framework ensure fast electron and Li ion transfer. As the cathode of a Li-S battery the sulfur-loaded HMMC has a high discharge capacity of 939 mAh·g-1 at 0. 3 C and a re-versible capacity of 731 mAh·g-1 after 150 cycles with only a 0. 15% capacity fade per cycle. Even at a high rate of 2 C, it still de-livers a high discharge capacity of 626 mAh·g-1 , showing an excellent rate performance.关键词
微孔-中孔炭/大的孔容/层次孔结构/锂硫电池Key words
Microporous-mesoporous carbon/Large pore volume/Hierarchical pore structure/Lithium sulfur battery分类
化学化工引用本文复制引用
牛树章,吴思达,吕伟,杨全红,康飞宇..一步硬模板法制备层次孔炭及其在锂硫电池中的应用[J].新型炭材料,2017,32(4):289-296,8.基金项目
国家重点基础研究发展计划(2014CB932400) （2014CB932400）
国家自然科学基金(U1401243) （U1401243）
深圳基础研究项目(JCYJ20150529164918734,JCYJ20150331151358140,JCYJ20150331151358136).Foundation item:National Key Basic Research Program of China (2014CB932400) （JCYJ20150529164918734,JCYJ20150331151358140,JCYJ20150331151358136）
National Natural Science Foundation of China ( U1401243 ) （ U1401243 ）
Shenzhen Basic Research Project ( JCYJ20150529164918734, JCYJ20150331151358140, JCYJ20150331151358136). （ JCYJ20150529164918734, JCYJ20150331151358140, JCYJ20150331151358136）
