| 학회 | 한국재료학회 |
| 학술대회 | 2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 | 17권 2호 |
| 발표분야 | C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 | Synthesis of Ultrathin Spinel LiMn2O4 Nanowires for Lithium Ion Battery |
| 초록 | Lithium ion batteries for advanced energy storage systems have been extensively studied due to the climate-change concerns and ever growing global energy demands. Synthetic procedures of nanosized materials are generally complex, cost affected, and difficult to scale up. LiMn2O4 prepared by the traditional solid-state synthesis exhibits good performance but it requires prolonged high temperature calcination, which causes coarsening of the powders. Thus, a simple and convenient route without loss of electrochemical properties is highly desired. This presentation presents the synthesis of one-dimensional spinel LiMn2O4 nanostructures using a facile and scalable two-step process. LiMn2O4 nanorods with average diameter of 100 nm and length of 1.5 μm have been prepared by solid-state lithiation of hydrothermally synthesized β-MnO2 nanorods. LiMn2O4 nanowires with diameter of 10 nm and length of several micrometers have been fabricated via solid-state lithiation of α-MnO2 nanowires. The precursors have been lithiated with LiOH and reaction temperature and pressure have been controlled. The complete structural transformation to cubic phase and the maintenance of 1-D nanostructure morphology have been evaluated by XRD, SEM, and TEM analysis. The size distribution of the spinel LiMn2O4 nanorods/wires has been similar to the MnO2 precursors. By control of reaction pressure, cubic 1-D spinel LiMn2O4 nanostructures have been fabricated from tetragonal MnO2 precursors even below 500 ºC. |
| 저자 | 이현욱1, P. Muralidharan2, 김도경1 |
| 소속 | 1KAIST 신소재공학과, 2RGCET Chemistry |
| 키워드 | Energy storage; lithium ion battery; lithium manganese oxide; nanowire; nanorod |
