| 학회 |
한국화학공학회 |
| 학술대회 |
2010년 가을 (10/21 ~ 10/22, 대전컨벤션센터) |
| 권호 |
16권 2호, p.2064 |
| 발표분야 |
재료 |
| 제목 |
Synthesis of Nanostructured Cathode Materials for Li-ion Batteries by Mineralization of Peptide Nanofibers |
| 초록 |
We report the synthesis ofFePO4 nanotubes by biomimetic mineralization of peptide nanofibers, formed by self-assembly of Fmoc-diphenylalanine. The peptide nanofibers were readily coated withFePO4 minerals when sequentially treated with aqueous solutions containing transition Fe3+ cations and PO43- anions. Detailed investigations revealed that peptide nanofibers were mineralized with amorphous hydrated FePO4. By incubating the peptide/FePO4 core/shell nanofibers at 350 ˚C, we could readily fabricate FePO4 nanotubes (average diameter ~20 nm, wall thickness ~5 nm) with inner walls coated with a thin conductive layer of amorphous carbon by carbonization of the peptide core. The novel carbon-coated FePO4 nanotubes were found to be a promising cathode material for rechargeable Li-ion batteries with a very high and reversible Li charge/discharge capacity (approx. 150 mAh g-1 at a rate of 10 mA g-1) and negligible capacity fading during cycling. |
| 저자 |
류정기, 김성욱, 강기석, 박찬범
|
| 소속 |
KAIST |
| 키워드 |
Li-ion battery; cathode; FePO4; biomimetics
|
| E-Mail |
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| 원문파일 |
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