| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
Virtual Lightning Session |
| 제목 |
A Conjugated Porous Polymer Complexed with a Single-Atom Cobalt Catalyst as an Electrocatalytic Sulfur Host for Enhancing Cathode Reaction Kinetics |
| 초록 |
Conjugated microporous polymers (CMPs) hold great promise for use in contemporary energy applications owing to their modular structures and tunable functionality. Here, we report a CMP embedded with a single-atom Co catalyst (Co-CMP) as an electrocatalytic cathode host for lithiumsulfur (Li-S) batteries. In addition, the Co-CMP features pyridinic nitrogen atoms and relatively large pore sizes that collectively facilitate sulfur cathode chemistry. Li-S cells fabricated with the Co-CMP outperform cells devoid of a single-atom catalyst, particularly in terms of specific capacity (1404 vs. 1338 mA h g-1 at 0.1 C), rate capability (766 vs. 613 mA h g-1 at 2 C), cycling stability (549 vs. 314 mA h g-1 after 1000 cycles at 0.5 C). X-ray absorption near-edge structure spectroscopy and density functional theory data reveal that the Co-CMP lowers the cathode reaction energies by bonding with the polysulfide anions as well as the Li cations present in the sulfur cathodes. |
| 저자 |
Xueying Fan, Jianxin Geng
|
| 소속 |
Beijing Univ. of Chemical Technology |
| 키워드 |
- |
| E-Mail |
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