Direct Physical Imaging and Chemical Probing of LiFePO4 for Lithium-Ion Batteries

被引:42
作者
Chung, Sung-Yoon [1 ,2 ]
Kim, Young-Min [3 ]
Choi, Si-Young [4 ]
机构
[1] Inha Univ, Dept Mat Sci & Engn, Inchon 402751, South Korea
[2] Nalphates LLC, Wilmington, DE 19801 USA
[3] Korea Basic Sci Inst, Taejon 305333, South Korea
[4] Korea Inst Mat Sci, Chang Won 641831, South Korea
基金
新加坡国家研究基金会;
关键词
POSITIVE-ELECTRODE MATERIALS; SINGLE DIRAC CONE; ELECTROCHEMICAL PROPERTIES; CRYSTAL-NUCLEATION; PHOSPHO-OLIVINES; MISCIBILITY GAP; IRON PHOSPHATE; LI-ION; 43; K; TEMPERATURE;
D O I
10.1002/adfm.201000393
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The control of unexpectedly rapid Li intercalation reactions without structural instability in olivine-type LiFePO4 nanocrystals is one of the notable scientific advances and new findings attained in materials physics and chemistry during the past decade. A variety of scientific studies and technological investigations have been carried out with LiFePO4 to elucidate the origins of many peculiar physical aspects as well as to develop more effective synthetic processing techniques for better electrochemical performances. Among the several features of LiFePO4 that have attracted much interest, in this article we address four important issues-regarding doping of aliovalent cations, distribution of Fe-rich secondary metallic phases, nanoparticle formation during crystallization, and antisite Li/Fe partitioning-by means of straightforward atomic-scale imaging and chemical probing. The direct observations in the present study provide significant insight into alternative efficient approaches to obtain conductive LiFePO4 nanocrystals with controlled defect structures.
引用
收藏
页码:4219 / 4232
页数:14
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