多硫化物
法拉第效率
材料科学
碳硼烷
共价有机骨架
分离器(采油)
共价键
纳米技术
锂(药物)
表面改性
储能
吸附
化学工程
有机化学
化学
电解质
电极
物理化学
功率(物理)
内分泌学
工程类
物理
热力学
医学
量子力学
作者
Mingming Li,Jun Yu,Yali Xue,Kai Wang,Qimeng Wang,Zhiying Xie,Lei Wang,Yang Yu,Jianping Wu,Xiaoyan Qiu,Haizhou Yu
标识
DOI:10.1021/acsami.2c18407
摘要
Lithium-sulfur batteries (LSBs) have attracted much attention due to their high energy density and theoretical specific capacity. However, the "shuttle effect" of polysulfides limits their application. Herein, we propose a postsynthetic modification (PSM) strategy to synthesize a fibrous carborane-tailored covalent organic framework (PMCB-COF). Benefiting from its amphiphilicity, strong adsorption ability, high specific surface area, and accessible Li+ transport channels, PMCB-COF could serve as a barrier to polysulfide to inhibit the shuttle effect. The cell assembled with PMCB-COF exhibits a high initial capacity of 926 mAh g-1 at 1 C. A Coulombic efficiency of 98% and a fading rate of only 0.039% per cycle are exhibited even after 1500 cycles. So far as we know, PMCB-COF is one of the best materials as a separator of LSBs. This work provides a safe and efficient avenue for tailoring COFs with carborane and might help promote the development of secure, low-cost, and durable rechargeable batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI