リチウム 2次電池用ナシコン正極におけるInductive効果

Translated title of the contribution: Inductive Effect in NASICON-Type Cathodes for Lithium Secondary Batteries

岡田 重人, 高田 智雄, 江頭 港, 山木 準一

Research output: Contribution to journalArticle

Abstract

We carried out redox-couple and counter-cation exchange in NASICON-type M_2(XO_4)_3 (M: Fe and Al; X: S, Mo and W) to control the cathode performance. The Fe^<3+>/Fe^<2+> redox potential in NASICON matrix is changed by the local crystalline field at the iron resulting from polarization of oxygen towards the counter cation in the polyanionic complex. It is confirmed by ^<57>Fe Mossbauer resonance, Fe-2p XPS, Mo K-XAFS and electrochemical measurements. This inductive effect in NASICON matrix is a significant material control technique for cathode design. We also found a promising anode candidate by ion exchange of Fe by Al in Fe_2(MoO_4)_3. The reversible capacity of Al_2(MoO_4)_3 reached almost 200mAh/g between 3.5V and 1.2V.
Translated title of the contributionInductive Effect in NASICON-Type Cathodes for Lithium Secondary Batteries
Original languageJapanese
Pages (from-to)81-85
Number of pages5
JournalThe Reports of Institute of Advanced Material Study,Kyushu University
Volume13
Issue number2
DOIs
Publication statusPublished - Dec 1999

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