材料科学
碳化
化学工程
催化作用
阴极
硫黄
锂(药物)
多孔性
纳米技术
储能
碳纤维
复合材料
有机化学
化学
物理化学
冶金
功率(物理)
内分泌学
工程类
物理
复合数
医学
量子力学
扫描电子显微镜
作者
Xin Zhou,Jin‐Lin Yang,Narui Li,Jiaye Yang,Jingyu Xi
标识
DOI:10.1016/j.mtener.2021.100941
摘要
Lithium-sulfur batteries (LSBs) have been widely considered as one of the most promising next-generation energy storage devices owing to the ultrahigh theoretical capacity (1,672 mAh/g) and energy density (2,600 Wh/kg). However, the shuttle effect of lithium-polysulfides (LiPSs) and the sluggish conversion kinetics impede the wide commercialization of LSBs. In this work, porous and catalytic MoN nanosheets were fabricated on the conductive carbonized cotton cloth (denoted as [email protected]) to serve as an interlayer for LSBs. The porous structure of MoN nanosheets provides abundant catalytic sites to capture LiPSs and accelerates conversion kinetics. Notably, hollow and conductive fibers in CCC substrate can physically restrain LiPSs and serve as a secondary current collector to recycle the dissolved sulfur species. Thus, the highly catalytic porous MoN and conductive CCC can synergistically generate an efficient trapping-conversion ability toward polysulfides. With the assistance of the [email protected] interlayer, the LSBs exhibit remarkable cycling stability and rate performance. Even with a high areal sulfur loading (5 mg/cm−1) cathode, an impressive areal specific capacity of 4 mAh/cm−1 can still be achieved at 0.1 C. This work paves a new way for the design of multifunctional interlayers in the commercial application of LSBs.
科研通智能强力驱动
Strongly Powered by AbleSci AI