Effect of ball-milling and lithium insertion on the lithium mobility and structure of Li3Fe2(PO4)3

被引：19

作者：

Cabana, Jordi ^{[1
,2
]}

Shirakawa, Junichi ^{[1
,3
]}

Nakayama, Masanobu ^{[3
]}

Wakihara, Masataka ^{[3
]}

Grey, Clare P. ^{[1
,4
]}

机构：

[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[3] Tokyo Inst Technol, Dept Appl Chem, Megro ku, Tokyo 1528552, Japan

[4] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 27期

基金：

日本学术振兴会;

关键词：

POSITIVE-ELECTRODE MATERIALS; SOLID-STATE NMR; LI-7 MAS NMR; MONOCLINIC LI3FE2(PO4)(3); IONIC-CONDUCTION; RECHARGEABLE BATTERIES; NEUTRON-DIFFRACTION; PHASE-TRANSITIONS; CATHODE MATERIALS; NA3FE2(PO4)3;

D O I：

10.1039/c0jm04197a

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 structure and lithium mobility have been investigated for A-and B-Li3Fe2(PO4)(3), before and after mechanical milling and lithium insertion, by using Li NMR. The data indicate that the milling step induces a significant amount of defects in the structure, while it improves the ability of the material to take up lithium. The lithium mobility in the different samples was studied by collecting NMR spectra at different temperatures, extensive lithium mobility being observed for both polytypes at temperatures above 150 degrees C. This mobility was found to be enhanced after milling. The enhancement in the electrode material utilization is ascribed to both a reduction of the diffusion lengths (particle size) and an increase in the intrinsic mobility of lithium in the sample.

引用

页码：10012 / 10020

页数：9