标题：
Mesoporous Silicon Anodes by Using Polybenzimidazole Derived Pyrrolic N-Enriched Carbon toward High-Energy Li-Ion Batteries
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所属单位：
材料科学与技术学院
发表刊物：
ACS Energy Lett.
摘要：
The silicon anode holds great potential for next-generation lithium-ion batteries in view of its high gravimetric capacity and natural abundance. The main challenges associated with silicon are the structural degradation and instability caused by huge volume change upon cycling. We report herein polybenzimidazole (PBI) derived pyrrolic N-enriched carbon as an ideal encapsulation onto microsized silicon spheres, which is achieved by an aerosol-assisted assembly combined with a simple physisorption process. The new polymer derived carbon endows silicon with the structural and compositional characteristics of intrinsic high electronic conductivity, abundant pyrrolic nitrogen, and structure robustness. The resulting mesoporous Si-PBI carbon composite exhibits excellent lithium storage performance in terms of high reversible specific capacity of 2172 mAh g-1, superior rate capability (1186 mAh g-1 at 5 A g-1), and prolonged cycling life. As a result, a fabricated Si/LiCoO2 full battery demonstrates high energy density of 367 Wh kg-1 as well as good cycling stability for 100 cycles. © 2017 American Chemical Society.
是否译文：
否
发表时间：
2017-06-09
合写作者：
聂平,Liu, Xiaoyan,付瑞瑞,吴宇婷,蒋江明,张校刚
通讯作者：
张校刚,窦辉
发表时间：
2017-06-09
学位：理学博士学位
职称：教授
所在单位：材料科学与技术学院