| 학회 |
한국화학공학회 |
| 학술대회 |
2011년 봄 (04/27 ~ 04/29, 창원컨벤션센터) |
| 권호 |
17권 1호, p.804 |
| 발표분야 |
재료 |
| 제목 |
Electrochemical Performance of Lithium Titanate Synthesized by Supercritical Hydrothermal Synthesis |
| 초록 |
Lithium Titanate (Li4Ti5O12, LTO) powders were successfully synthesized in supercritical water condition in 400 oC and 30 MPa with 15 min 6 hours reaction time with or without calcination. As-synthesized LTO particles are flaky and highly porous in nature with a surface area of 12 40 m2/g. Transmission electron micrographs indicate the primary particles to be agglomerated crystallites of varying size between 20 and 50 nm. Effect of residence time and concentration of precursor were studied with a supercritical water batch reactor. Precursor concentration and residence time played a key role in the production of single-phase Li4Ti5O12 powders. The XRD pattern was confirm that as-synthesized particle have Li4Ti5O12 pattern with small amount of TiO2 impurities. The good electrochemical performance is ascribed to nanoparticle morphology of the electrodes that provide short diffusion paths for Li+ for insertion/ deinsertion process. The Li4Ti5O12 electrodes also exhibit promising capacity retention with little capacity loss over 50 cycles at varying discharge rates. |
| 저자 |
Agung Nugroho, 김수진, 정경윤, 김재훈
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| 소속 |
한국과학기술(연) |
| 키워드 |
Lithium Titanate; Supercritical water; Nanoparticles
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| E-Mail |
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| 원문파일 |
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