Diffusional mechanism of deintercalation in LiFe1-yMnyPO4 cathode material

被引：110
作者：
Molenda, J.
Ojczyk, W.
Swierczek, K.
Zajac, W.
Krok, F.
Dygas, J.
Liu, Ru-Shi
机构：
[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland
[2] Warsaw Univ Technol, Fac Phys, PL-00661 Warsaw, Poland
[3] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan
来源：
SOLID STATE IONICS | 2006年 / 177卷 / 26-32期
关键词：
phospho-olivine; LiFe1-yMnyPO4; lithium diffusion; cathode materials for Li-ion batteries; intercalation; ELECTRICAL-CONDUCTIVITY; ELECTRONIC-STRUCTURE; OLIVINE; LIFEPO4; LITHIUM; FE;
D O I：
10.1016/j.ssi.2006.03.047
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 paper presents the investigations on the structural, electrical and electrochemical properties of Mn substituted phospho-olivines LiFe1-y MnyPO4 and of W, Ti or Al doped LiFePO4. The microscopic nature of the observed macroscopic, metallic-like conductivity of W, Ti, Al doped phospho-olivine samples is discussed. Some fundamental arguments against the bulk type conductivity are presented. A single phase, diffusional mechanism of deintercalation was found to appear for Mn-substituted LiFe(1-y)Mn(y)PO(4)samples in the whole range of lithium concentration, in contrast to the pure LiFePO4, LiMnPO4 and W, Ti, Al doped phospho-olivines, where a two-phase mechanism of electrochemical lithium extraction/insertion is observed. (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：2617 / 2624
页数：8
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