| 학회 | 한국화학공학회 |
| 학술대회 | 2015년 가을 (10/21 ~ 10/23, 일산 KINTEX) |
| 권호 | 21권 2호, p.2241 |
| 발표분야 | 촉매 및 반응공학 |
| 제목 | Synthesis of Ordered Mesoporous Co3O4@Si Multilayers as Anode Materials for Lithium Ion Batteries |
| 초록 | Transition metal oxides have been investigated as alternative anodes for lithium ion battery. Cobalt oxide (Co3O4) has high capacity (890 mAh g-1) due to conversion reaction. However, it occurs extreme volume changes during lithiation and de-lithiation leading to material cracking and degradation. To solve these adverse problems, Some methods have been used. First, the ordered mesoporous Co3O4 were synthesized since the nano-structures can increase the rapid transport of lithium ion and electron and the each mesopore acts as a buffer for volume changes. Second, we distinctively suggested useful surface modification for enhancing rate capability. The Co3O4 surface attached functional groups are expected to act important role in electrochemical performance. Herein, we report simple and effective strategy to synthesize ordered mesoporous Co3O4 with surface modification by silylation. And as-prepared sample is calcined at 500°C to form Si-layer. It is repeated four times to set up 4 layer of Si. The surface chemistry of ordered mesoporous Co3O4 expects to work efficiently during lithiation and de-lithiation and improve rate capability. |
| 저자 | 김지만, 김경호, 박귀옥, 이현아 |
| 소속 | 성균관대 |
| 키워드 | mesoporous material; lithium ion battery |
| 원문파일 | 초록 보기 |
