화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU))
권호 26권 1호
발표분야 포스터-에너지저장·변환
제목 Water-Repellent Ionic Liquid Skinny Gels Customized for Aqueous Zn-Ion Battery Anodes
초록 Despite the potential of aqueous zinc (Zn)-ion batteries as a cost-competitive and safer power source, practical applications have been plagued by the chemical/electrochemical instability of Zn anodes with aqueous electrolytes. Here, ionic liquid (IL) skinny gels are reported as a water-repellent ion-conducting protective layers customized for Zn anodes. The IL skinny gel (thickness ≈500 nm), consisting of hydrophobic IL solvent, Zn salts, and thiol-ene polymer skeleton, prevents the access of water molecules to Zn anodes while allowing Zn2+ conduction. The IL-gel-skinned Zn anode enables sustainable Zn plating/stripping cyclability under 90% depth of discharge (DODZn) without water-triggered interfacial side reactions. Driven by advantageous effects, a Zn-ion full cell (IL-gel-skinned Zn-anode||aqueous-electrolyte-containing MnO2 cathode) exhibits high cycling performance (95.7% capacity retention​ after 600 cycles) compared to conventional aqueous Zn-ion batteries.
저자 김원영, 이상영
소속 연세대
키워드 Aqueous Zn-ion batteries; Zn anodes; Electrode-customized electrolyte; Water-repellent ion-conducting protective layers; Ionic liquid skinny gels
E-Mail syleek@yonsei.ac.kr