Mixed-Metal-Organic Framework with Effective Lewis Acidic Sites for Sulfur Confinement in High-Performance Lithium-Sulfur Batteries

ACS Applied Materials & Interfaces
Ziqi WangGuodong Qian

Abstract

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.

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Citations

Feb 11, 2018·Angewandte Chemie·Haoqing JiangHexiang Deng
Jun 27, 2020·Chemistry : a European Journal·Ahmed A AbdelkaderHani M El-Kaderi
Jul 9, 2020·Anais Da Academia Brasileira De Ciências·Vitor L MartinsRoberto M Torresi
Feb 18, 2021·Chemical Society Reviews·Gabrielle A LeithNatalia B Shustova
Jul 28, 2018·ACS Applied Materials & Interfaces·Xiao-Jue BaiWei Qi

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