期刊
NANO ENERGY
卷 89, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106331
关键词
Multifunctional separator; Ultrahigh loading; Cation vacancy; Strong affinity; High catalytic ability
类别
资金
- National Natural Science Foundation of China [51802171, 22005169]
- Taishan Scholars Program , Natural Science Foundation of Shandong Province, China [ZR2018BB031, ZR2020QB121]
- Youth Innovation of Shandong Higher Education Institutions, China [2019KJC004]
- Outstanding Youth Foundation of Shandong Province, China [ZR2019JQ14]
- Applied Research Project for Postdoctoral Researcher of Qingdao City, China
The authors designed and synthesized Zn defective Zn/Co oxide nanosheets to construct a multifunctional polysulfide-blocking layer to overcome the hurdles in commercializing Li-S batteries. The composite separator with high capacity and high sulfur loading shows promise for constructing high-performance Li-S batteries.
The major hurdle in Li-S battery commercialization is the severe shuttle effect and sluggish reaction kinetics of polysulfide conversion during charge-discharge cycling. Herein, to overcome these barriers, we designed and synthesized Zn defective Zn/Co oxide (ZDZCO) nanosheets, a cation-vacancy-rich bimetallic oxide for the construction of a multifunctional polysulfide-blocking layer. Both theoretical and experimental studies have comprehensively demonstrated that the ZDZCO shows robust binding capability towards polysulfides and a high catalytic ability for fast polysulfide conversion. Through a facile coating process, the multifunctional ZDZCO polysulfide-blocking layer is incorporated on a commercial polypropylene separator, forming a composite separator. The resultant separator facilitates an ultrahigh sulfur loading of 21.06 mg cm(-2) and an areal capacity as high as 24.25 mAh cm(-2). This study illuminates a promising and practical strategy to construct highperformance Li-S batteries with high sulfur loading.
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