期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 32, 页码 38394-38404出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c10958
关键词
3D interconnected sulfur; high sulfur content; lithium-sulfur batteries; cathode; MnO2
资金
- Hubei Provincial Department of Education [D20201007]
- Ministry of Science and Technology of China [2016YFA0200200]
- National Nature Science Fund of China [21401049]
In this study, a three-dimensional interconnected sulfur system is utilized to create a cathode for lithium-sulfur batteries, achieving high sulfur content and uniform distribution. The synergistic effect of the 3D interconnected architecture and uniform coating layer of MnO2 leads to excellent cycling performance with a high capacity retention even at high rates.
Herein, a three-dimensional interconnected sulfur (3DIS) system is used to construct a cathode of the lithium-sulfur battery. Compared with the traditional methods of encapsulating sulfur, the 3DIS system serves as a framework to grow MnO2, which ensures a high sulfur content of 91.5 wt % (the ratio of sulfur/host was 10.8) and a uniform distribution of sulfur. Due to the synergistic effect of the 3D interconnected architecture and the uniform coating layer of polar MnO2, 3DIS@MnO2 (3DISMO) delivers a capacity of 891 mA h g(-1) after 900 cycles at 1 C. Even at a rate of 10 C, a capacity decay rate of 0.061% per cycle is achieved.
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