Elucidation of the reaction mechanism upon lithiation and delithiation of Cu0.5TiOPO4

被引：19

作者：

Bleith, Peter ^{[1
]}

Valla, Maxence ^{[2
]}

Novak, Petr ^{[1
]}

Villevieille, Claire ^{[1
]}

机构：

[1] Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland

[2] ETH, Inorgan Chem Lab, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 31期

基金：

瑞士国家科学基金会;

关键词：

LITHIUM; INTERCALATION; NI0.5TIOPO4;

D O I：

10.1039/c4ta01627k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The reaction mechanism of Cu0.5TiOPO4 upon lithiation and delithiation was elucidated by XAS, P-31-NMR, XRD, EDX, and electrochemical methods. The material reacts with a combined insertion and conversion process, in which first copper is extruded irreversibly by forming LiTiOPO4. Afterwards, Ti4+ is reduced reversibly in an insertion reaction followed by a conversion reaction. The conversion reaction leads to amorphization of the sample while titanium is reduced to oxidation states below 2+.

引用

页码：12513 / 12518

页数：6

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