Chemical state of iron of LiFePO4 during charge-discharge cycles studied by in-situ X-ray absorption spectroscopy
-
- Inoue Katsuya
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
-
- Fujieda Shun
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
-
- Shinoda Kozo
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
-
- Suzuki Shigeru
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
-
- Waseda Yoshio
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
書誌事項
- タイトル別名
-
- Chemical State of Iron of LiFePO<SUB>4</SUB> during Charge-Discharge Cycles Studied by <I>In-Situ</I> X-ray Absorption Spectroscopy
この論文をさがす
抄録
In-situ X-ray absorption spectroscopy (XAS) at the Fe K-edge X-ray absorption near edge was used to investigate the chemical change of LiFePO4, which is a candidate cathode material for lithium ion batteries, during charge-discharge cycles. The relative amount of FePO4 formed in the LiFePO4 by the charge-discharge cycles was estimated from the XAS spectra. The results show that the amount of FePO4 in the LiFePO4 increased with charging and decreased with discharging. While a linear relationship between the relative amount of FePO4 and electrical capacity was observed during the initial charging, it deviated from linearity during the charge-discharge cycles. This may be attributed to the irreversible diffusion paths of lithium ions and/or the partial formation of inactive FePO4 in the LiFePO4 during the charge-discharge cycles. It is shown that in-situ XAS has sufficient potential to nondestructively characterize heterogeneous electrochemical reactions in electrode materials during charge-discharge cycles.
収録刊行物
-
- MATERIALS TRANSACTIONS
-
MATERIALS TRANSACTIONS 51 (12), 2220-2224, 2010
公益社団法人 日本金属学会
- Tweet
キーワード
詳細情報
-
- CRID
- 1390001204251040128
-
- NII論文ID
- 10027471600
- 130004454371
-
- NII書誌ID
- AA1151294X
-
- ISSN
- 13475320
- 13459678
-
- NDL書誌ID
- 10899764
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
-
- 抄録ライセンスフラグ
- 使用不可