| 학회 |
한국공업화학회 |
| 학술대회 |
2017년 가을 (11/08 ~ 11/10, 부산 벡스코(BEXCO)) |
| 권호 |
21권 2호 |
| 발표분야 |
(국제협력) 우수 외국인 연구자 세션 |
| 제목 |
Structural investigation of NiFe2O4 as a high-performance conversion based anode for Li-ion batteries |
| 초록 |
Nickel ferrite (NiFe2O4) is previously shown to have promising electrochemical performance for lithium ion batteries (LIBs) as an anode material. However, associated electrochemical processes along with structural changes during conversion-reaction hardly studied. Nano-crystalline NiFe2O4 was synthesized with the aid of a simple citric acid assisted sol-gel method. Ex-situ X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) were employed at different potential states during the cell operation to elucidate the conversion reaction of a NiFe2O4 anode. Investigation reveals that lithium extraction reaction is not fully agreed with previously reported one, and is found to be a hindered oxidation of metallic nickel to nickel oxide in the applied potential window. Iron is participating in electrochemical reaction with full reversibility, and form iron oxide in the fully charged state while nickel is found the cause of partial irreversible capacity. |
| 저자 |
mobinul islam |
| 소속 |
한국과학기술(연) |
| 키워드 |
NiFe2O4; Conversion reaction; Lithium-ion battery; X-ray absorption spectroscopy; Spinel oxide
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| E-Mail |
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