| 학회 |
한국화학공학회 |
| 학술대회 |
2018년 봄 (04/25 ~ 04/27, 창원컨벤션센터) |
| 권호 |
24권 1호, p.843 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Fabrication of three-dimensional ordered macroporous spinel CoFe2O4 as efficient bifunctional catalysts for the positive electrode of lithium–oxygen batteries |
| 초록 |
In this work, three-dimensionally ordered macroporous (3DOM) CoFe2O4 (CFO), which consist of macroporous channels, were prepared for the bifunctional catalysts of Li-O2 battery positive electrodes. For the preparation of 3DOM CFO, polystyrene colloidal crystals were used as the templates enabling the pore sizes to be tailored to allow an investigation into the effects of morphological changes on the electrochemical properties. The as-prepared O2-electrode of 3DOM CFO catalyst with a pore diameter of 140 nm (3DOM CFO@140) catalyst shows a high initial discharge capacity (ca. 11658.5 mAh g-1) and high rate capability. Furthermore, the Li-O2 cell with 3DOM CFO@140 has high cyclablity for more 47 cycles under a limited capacity (up to 500 mAh g-1) with a reduced overpotential (1.13 V), as compared with that with pure ketjen black carbon and 3DOM CFO catalyst with a pore diameter of 60 nm (3DOM CFO@60). From the view of their unique structure and high Li+ storage performance, the 3DOM CFO catalysts prepared here could be a promising O2-electrode catalyst for Li-O2 batteries. |
| 저자 |
노유성1, 김종국2, 김영민3, 이선화2, 김원배1
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| 소속 |
1포항공과대, 2광주과학기술원, 3한국화학(연) |
| 키워드 |
촉매 및 반응공학 |
| E-Mail |
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| 원문파일 |
초록 보기 |
