| 세션명 | Virtual Lightning Session |
|---|---|
| 발표장 | Online (10/20~10/22) |
| 논문코드 | VPS-37 |
| 발표일 | --2020 |
| 발표시간 | |
| 논문제목 | A Conjugated Porous Polymer Complexed with a Single-Atom Cobalt Catalyst as an Electrocatalytic Sulfur Host for Enhancing Cathode Reaction Kinetics |
| 발표자 | Xueying Fan |
| 발표자 소속 | Beijing University of Chemical Technology |
| 저자 | Xueying Fan, Jianxin Geng† |
| 소속 | Beijing University of Chemical Technology |
| 논문초록 | 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. |
THE POLYMER SOCIETY OF KOREA