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Potassium–Sulfur Batteries: A New Member of Room-Temperature Rechargeable Metal–Sulfur Batteries
Abstract
We report room-temperature rechargeable potassium-sulfur (K-S) batteries using ordered mesoporous carbon (CMK-3)/sulfur and polyanilime (PANI) coated CMK-3/sulfur composites as the cathode and metallic potassium as the anode. The electrochemical reaction mechanism was investigated by electrochemical tests, TEM, XRD, and Raman spectra. It was found that K-S batteries delivered two reduction peaks located at about 2.1 and 1.8 V and one oxidation peak at about 2.2 V, respectively. Meanwhile, K2S3 was the major discharge product that could be charged to reversibly form S and K ion. Through optimization of sulfur content, the CMK-3/sulfur composite with 40.8 wt % S displayed an initial discharge capacity of 512.7 mAh g(-1) and a capacity of 202.3 mAh g(-1) after 50 cycles at a current density of 50 mA g(-1). A coating of conductive polyanilime (PANI) on the CMK-3/sulfur composite is effective in enhancing the cycling performance. In comparison, PANI@CMK-3/sulfur composite showed a capacity of 329.3 mAh g(-1) after 50 cycles at 50 mA g(-1). The results shed light on the basic study of rechargeable K-S batteries.
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Ni1-xPtx (x = 0−0.12) Hollow Spheres as Catalysts for Hydrogen Generation from Ammonia Borane
Cheng, F., Ma, H., Li, Y., & Chen, J. (2007) · Inorganic Chemistry · doi:10.1021/ic061712e · Cited by 349
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Metadata
- Authors
- Zhao, Q., Hu, Y., Zhang, K., & Chen, J.
- Venue
- Inorganic Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-08-13
- Volume
- 53
- Issue
- 17
- Pages
- 9000-9005
- ISSN
- 0020-1669 (ISSN-L)
- 1520-510X
- OpenAlex
- W2319922597
- Cited by
- 199
- References
- 1
- FWCI
- 4.78
- Type
- journal article
- Language
- en
- Open access
- closed
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