期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 37, 页码 20999-21004出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b07024
关键词
metal-organic framework; metalloporphyrin ligand; Lewis acidic sites; sulfur confinement; lithium-sulfur battery
资金
- National Natural Science Foundation of China [51272229, 51272231, 51472217]
- Zhejiang Provincial Natural Science Foundation of China [LR13E020001]
- Qianjiang Talent Project [QJD1302009]
- Welch Foundation [AX-1730]
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 M.MOFs-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 Cu2+. 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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