用于高性能锂硫电池中硫限制的具有有效路易斯酸性位点的混合金属有机框架
Mixed-Metal-Organic Framework with Effective Lewis Acidic Sites for Sulfur Confinement in High-Performance Lithium-Sulfur Batteries.
作者信息
Wang Ziqi, Wang Buxue, Yang Yu, Cui Yuanjing, Wang Zhiyu, Chen Banglin, Qian Guodong
机构信息
State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Department of Materials Science and Engineering, Zhejiang University , Hangzhou 310027 P. R. China.
Department of Chemistry, University of Texas at San Antonio , San Antonio, Texas 78249, United States.
出版信息
ACS Appl Mater Interfaces. 2015 Sep 23;7(37):20999-1004. doi: 10.1021/acsami.5b07024. Epub 2015 Sep 8.
The mixed-metal-organic framework approach and a representative zirconium-metalloporphyrin framework (MOF-525) have been developed to create novel sulfur hosts and Li-S batteries. The different local environments at the centers of the porphyrin moieties in a series of MMOFs-MOF-525(2H), MOF-525(FeCl), and MOF-525(Cu)-have led to their different behaviors for the confinement of sulfur and thus Li-S batteries. The unique structure of MOF-525(Cu) has enabled each Cu(2+) site to offer two Lewis acidic sites, featuring it as a very powerful MOF host for the inclusion of sulfur and polysulfides. The S@MOF-525(Cu) cathode has demonstrated the best performance among all reported sulfur/MOFs composite cathode materials, with a reversible capacity of about 700 mAh/g at 0.5 C after 200 cycles.
混合金属有机框架方法和一种具有代表性的锆基金属卟啉框架（MOF-525）已被开发用于制备新型硫宿主材料和锂硫电池。一系列金属有机框架材料MOF-525(2H)、MOF-525(FeCl)和MOF-525(Cu)中卟啉部分中心的不同局部环境导致了它们在限制硫方面的不同行为，进而影响锂硫电池性能。MOF-525(Cu)的独特结构使每个Cu(2+)位点提供两个路易斯酸性位点，使其成为用于容纳硫和多硫化物的非常强大的金属有机框架宿主。S@MOF-525(Cu)阴极在所有报道的硫/金属有机框架复合阴极材料中表现出最佳性能，在0.5 C下循环200次后可逆容量约为700 mAh/g。
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