화학공학소재연구정보센터
학회 한국화학공학회
학술대회 2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터)
권호 28권 1호, p.1427
발표분야 [주제 12] 화학공학일반(부문위원회 발표)
제목 Improving Lithium-Sulfur Battery Performances by Using N-containing Porous Aromatic Framework 41 as the Sulfur Support
초록 N-containing porous aromatic framework 41 (PAF-41) with hierarchical porous structure has been readily synthesized through Scholl reaction by using triphenylamine as the monomer. The extended skeleton of PAF-41 is constructed by N-bridged biphenyl groups to generate a consecutive conjugative electronic structure. The hierarchical porous skeleton and the presence of N atoms effectively confine the electroactive species by synergistic physisorption and chemisorption to alleviate the shuttle effect that is induced by the soluble polysulfides. These features render the sulfur impregnated PAF-41 (SPAF-41) improved lithium sulfur battery performances, especially the cycling stability. SPAF-41 composite cathode with high sulfur loading of 72 wt% exhibits enhanced rate capability and excellent cycling performance. The cell delivers a high capacity of 725.8 mAh g−1 at 0.5 C in the first cycle and sustains a reversible capacity of 491.4 mAh g−1 after 500 charge-discharge cycles. A low decay rate 0.06% per cycle is achieved. The well conductive PAF-41 support bestows the cell high Coulombic efficiency of 97.36%.
저자 Wang Qian1, 김지만2
소속 1성균관대, 2Sungkyunkwan Univ.
키워드 촉매(Catalyst)
E-Mail jimankim@skku.edu
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