| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 가을 (10/06 ~ 10/08, 대구컨벤션센터(EXCO)) |
| 권호 |
40권 2호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Layered Hierarchical Nb2O5/carbon@Nb4C3 MXene Core-Shell Composite for Energy Storage Devices |
| 초록 |
Metal oxide/carbon composites have been widely used as energy storage materials, as metal oxides have high capacity and the carbon acts as a conducting matrix for electron transfer. Out of these materials, niobium oxide (Nb2O5)/carbon composites have been preferred due to its high capacity, good cyclability, and stable operation. Herein, we have oxidized a two-dimensional metal carbide (MXene) in CO2 flow gas to fabricate Nb2O5/carbon@Nb4C3Tx via one step oxidation. Such a core-shell configuration would explore the high conductivity of core MXene, the fast rate response of shell Nb2O5 and electron “bridge” effect of disordered carbon. The Nb2O5/carbon@ Nb4C3Tx showed 208 mAh g-1 and 141 mAh cm-3 at 50 mA g-1 (0.25 C), and retained 94% of initial specific capacity after 400 cycles with good rate capability. Since oxidized MXene as a Li-ion battery anode has just started to be investigated, there is great room to push the boundaries further and achieve better performances. |
| 저자 |
정희태1, Yury Gogotsi2, Chuanfang Zhang3, 김선준1
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| 소속 |
1KAIST, 2Drexel Univ., 3Trinity College Dublin |
| 키워드 |
MXene; metal oxide; carbon; Li-ion battery
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| E-Mail |
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