| 학회 |
한국고분자학회 |
| 학술대회 |
2011년 가을 (10/06 ~ 10/07, 김대중 컨벤션센터) |
| 권호 |
36권 2호 |
| 발표분야 |
대학원생 구두발표 |
| 제목 |
Block copolymer directed simple synthesis of large pore sized and carbon coated Li4Ti5O12 for lithium ion battery |
| 초록 |
A spinel Li4Ti5O12 nanocomposite with thin carbon layers and large pores is simply fabricated via self-assembly of block copolymer and inorganic precursor. Polyisoprene-block-poly(ethylene oxide) (PI-b-PEO) containing a sp2 carbon is employed to induce the structure of mesoporous Li4Ti5O12. Then as-synthesized material is heat-treated up to 700˚C to convert inorganic sources to the spinel Li4Ti5O12 sustaining mesoporous structure. Carbon from part of PI preserved the porous mesostructure and improves the electronic conductivity. This mesoporous Li4Ti5O12 is used as anode for lithium ion battery compared with Bulk Li4Ti5O12 . When cycled at 10 C-rate, Mesoporous Li4Ti5O12 shows reversible capacity of 115 mA h g-1. However, a Bulk Li4Ti5O12 exhibits only 69 mA h g-1 at 10 C-rate. Excellent performance of mesoporous Li4Ti5O12 with carbon coating layer is attributed to short path way of electron and lithium ion and electrical conductivity. |
| 저자 |
강은애1, 김진곤2
|
| 소속 |
1포항공과대, 2포항공대 |
| 키워드 |
block copolymer; lithium ion battery; mesoporous LTO
|
| E-Mail |
|
