Open Circuit Voltage of LixFePO4 Olivine Cathode and Its Electrochemical Reaction
-
- Nakamura Tatsuya
- Department of Electrical Eng., Graduate School of Eng., University of Hyogo
-
- Matsui Hiroki
- Department of Electrical Eng., Graduate School of Eng., University of Hyogo
-
- Yamada Yoshihiro
- Department of Electrical Eng., Graduate School of Eng., University of Hyogo
-
- Tabuchi Mitsuharu
- Advanced Industrial Science and Technology
-
- Kobayashi Yo
- Central Research Institute of Electric Power Industry
Bibliographic Information
- Other Title
-
- オリビン正極LixFePO4の平衡電位と電気化学反応
- オリビン セイキョク Li x FePO4 ノ ヘイコウ デンイ ト デンキ カガク ハンノウ
Search this article
Abstract
Cathode using the olivine particles was subjected to an open-circuit voltage measurement under the relaxation condition of 24 h at each SOC and DOD states. The electrochemical reaction in the LiFePO4 cathode was composed of a large plateau around 3.45 V with sloped regions nearby for both the fully charged and discharged states. It was found that the potential profile in the sloped regions exhibited a hysteresis. Furthermore, both sloped regions became narrower when the operating temperature was raised from 30 to 60°C. Furthermore, it was found that the apparent diffusion coefficient of Li+ ions in the sloped regions was much smaller than that in the plateau region. These facts implied that the obtained profiles were not in an equilibrium state with a quasi-OCV profile than the real one, and that the potential relaxation in the sloped regions took an extremely long time.
Journal
-
- Journal of the Japan Society of Powder and Powder Metallurgy
-
Journal of the Japan Society of Powder and Powder Metallurgy 57 (11), 725-728, 2010
Japan Society of Powder and Powder Metallurgy
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001206308061952
-
- NII Article ID
- 10027408737
-
- NII Book ID
- AN00222724
-
- ISSN
- 18809014
- 05328799
-
- NDL BIB ID
- 10917269
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed