| 학회 | 한국재료학회 |
| 학술대회 | 2007년 가을 (11/02 ~ 11/02, 성균관대학교) |
| 권호 | 13권 2호 |
| 발표분야 | 에너지환경재료 |
| 제목 | Li Intercalations in Single Crystalline Nanowires as Anode Materials for Lithium Ion Battery |
| 초록 | Studies of the anode materials in lithium-ion rechargeable batteries are focusing on the metal oxides and metal alloys due to their specific capacity much higher than the already-commercialized graphite. However, large volume changes in these materials in the course of Li+ intercalation cause internal damages and resulting in loss of capacity and rechargeability. In this regard, one dimensional oxide and alloy nanostructure such as nanowires can be explored as anode materials due to their high surface area that could compensate the damages. Herein, we report Li intercalation behavior of single crystalline oxide (SnO2, ZnO) and non-oxide (Si) nanowires as anode materials for Li ion batteries. SnO2, ZnO, and Si nanowires were synthesized by a conventional chemical vapor deposition (CVD) process. Li ion half cells were then fabricated using nanowires and the reversible capacity was measured by conducting constant current charge/discharge experiments between the potential limits of 0.2 V and 3 V versus Li+/Li. The half cell with Si nanowires faded the discharge capacity due to volume expansion of the nanowires. Meanwhile, SnO2 and ZnO nanowires showed successful intercalation of Li up to 30th cycles with good capacity retention (60% of first cycle). The advantage of nanowires as anode materials for Li ion batteries will be discussed based on these results. |
| 저자 | Myeongha Kim, Han-Kyu Seong, Heon-Jin Choi |
| 소속 | Yonsei Univ. |
| 키워드 | : nanowires; energy conversion; Lithium secondary battery |
