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Boron-doped microporous nano carbon as cathode material for high-performance Li-S batteries
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wu, Feng Qian, Ji Jun Wu, Weiping Ye, Yusheng Sun, Zhiguo Yang, Xiaoguang Xu, Yuhong Zhang, Jiatao Chen, Renjie |
| Copyright Year | 2016 |
| Abstract | In this study, a boron-doped microporous carbon (BMC)/sulfur nanocomposite is synthesized and applied as a novel cathode material for advanced Li-S batteries. The cell with this cathode exhibits an ultrahigh cycling stability and rate capability. After activation, a capacity of 749.5 mAh/g was obtained on the 54th cycle at a discharge current of 3.2 A/g. After 500 cycles, capacity of 561.8 mAh/g remained (74.96% retention), with only a very small average capacity decay of 0.056%. The excellent reversibility and stability of the novel sulfur cathode can be attributed to the ability of the boron-doped microporous carbon host to both physically confine polysulfides and chemically bind these species on the host surface. Theoretical calculations confirm that boron-doped carbon is capable of significantly stronger interactions with the polysulfide species than undoped carbon, most likely as a result of the lower electronegativity of boron. We believe that this doping strategy can be extended to other metal-air batteries and fuel cells, and that it has promising potential for many different applications. |
| Starting Page | 426 |
| Ending Page | 436 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s12274-016-1303-7 |
| Volume Number | 10 |
| Alternate Webpage(s) | http://openaccess.city.ac.uk/16644/1/1303.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s12274-016-1303-7 |
| Journal | Nano Research |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
