| 학회 | 한국화학공학회 |
| 학술대회 | 2019년 가을 (10/23 ~ 10/25, 대전컨벤션센터) |
| 권호 | 25권 2호, p.1685 |
| 발표분야 | 에너지 환경 (Energy and Environment) |
| 제목 | New bi-functional additive enabled stable cycling Li-metal batteries |
| 초록 | emerging as promising energy storage devices because of their high energy density. However, Li/Ni-rich NCM batteries have been plagued by the issue of the thermodynamic instability of the Li metal anode and aggressive surface chemistry of the Ni-rich cathode. In this work, we propose a bifunctional additive, adiponitrile which can effectively stabilize both the Li metal anode and Ni-rich NCM cathode interfaces. In the Li/Ni-rich NCM battery, the addition of 1 wt.% adiponitrile in carbonate based electrolyte helps to produce a conductive and robust Li anode/electrolyte interface, while the strong coordination between Ni4+ on the delithiated Ni-rich cathode and the nitrile group in adiponitrile reduces parasitic reactions between the electrolyte and Ni-rich cathode surface. Therefore, upon using 1 wt.% adiponitrile, Li/Ni-rich NCM (Li[Ni0.75Co0.10Mn0.15]O2) battery achieves an unprecedented cycle retention of 75% over 800 cycles even under high capacity loading of 1.8 mAh cm-2 and fast charge-discharge time of 2 h. |
| 저자 | 이선화, 선양국 |
| 소속 | 한양대 |
| 키워드 | 에너지 환경 |
| 원문파일 | 초록 보기 |
