| 학회 | 한국화학공학회 |
| 학술대회 | 2021년 봄 (04/21 ~ 04/23, 부산 BEXCO) |
| 권호 | 27권 1호, p.14 |
| 발표분야 | [주제별심포지엄]에너지 저장 소재 심포지엄 |
| 제목 | In-situ X-ray analyses of layered double hydroxides for high performance aqueous rechargeable battery |
| 초록 | Increasing demand for energy storage systems that guarantee safety and cost-competitiveness promotes aqueous rechargeable batteries (ARBs) as one of the most promising energy storage systems. Yet, it is still difficult to find out a material capable of operating within the limited electrochemical window of aqueous electrolytes in a robust manner. In this symposium talk, researches on ARBs using layered double hydroxides (LDHs) will be introduced. In-situ X-ray diffraction and absorption analyses revealed that the charge storage mechanism of LDH is different from the β phase counterpart. Crystal water, as a product of the charging process, is re-arranged into a superlattice pattern in the LDH host framework. Since this superlattice arrangement of crystal water molecules can effectively alleviate the lattice distortion, a full cell battery paired with Fe3O4 anode, exhibited an operating voltage of 1.1 V with high capacity (198 mAh/g), high power capability (172 mAh/g@1min) over 10,000 cycles. When replacing Fe3O4 with Zn, the LDH-based full cell exhibited high working voltage up to 1.7 V. |
| 저자 | 이지훈 |
| 소속 | Kyungpook National Univ. |
| 키워드 | Aqueous rechargeable battery; Layered double hydroxide; X-ray characterization; Crystal water; Superlattice |
| 원문파일 | 초록 보기 |
