Surface adsorption and disordering in LiFePO4 based battery cathodes

被引：50

作者：

Kayyar, Archana ^{[1
]}

Qian, Haijun ^{[2
]}

Luo, Jian ^{[1
,3
]}

机构：

[1] Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA

[2] Clemson Univ, Electron Microscope Facil, Anderson, SC 29625 USA

[3] Clemson Univ, Ctr Opt Mat Sci & Engn Technol, Anderson, SC 29625 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 22期

关键词：

adsorption; cathodes; iron compounds; lithium compounds; nanoparticles; secondary cells; SURFICIAL AMORPHOUS FILMS; GRAIN-BOUNDARY COMPLEXION; LI-ION BATTERIES; UNSUPPORTED CLAIMS; PARTICLE-SIZE; DOPED ALUMINA; TRANSITION; ZNO;

D O I：

10.1063/1.3270106

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A recent study [Kang and Ceder, Nature (London) 458, 190 (2009)] suggested that a Li4P2O7-like "fast ion-conducting surface phase" could form on the surfaces of LiFePO4 particles, enabling ultrafast discharging of Li-ion batteries. We demonstrate that these nanoscale surface films exhibit a self-selecting or "equilibrium" thickness, akin to those observed in simpler binary oxides [Luo and Chiang, Annu. Rev. Mater. Res. 38, 227 (2008)]. These observations can be interpreted as a case of coupled prewetting and premelting. Similar nanoscale intergranular films are also observed. These nanoscale interfacial phenomena can be utilized to tailor nanoparticles for battery and many other applications.

引用

页数：3

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