Capacitive Energy Storage on Fe/Li3PO4 Grain Boundaries

被引：48

作者：

Guo, Xianwei ^{[1
]}

Fang, Xiangpeng ^{[1
]}

Mao, Ya ^{[1
]}

Wang, Zhaoxiang ^{[1
]}

Wu, Feng ^{[2
]}

Chen, Liquan ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Lab Solid State Ion, Beijing 100190, Peoples R China

[2] Beijing Inst Technol, Sch Chem Engn & Environm, Beijing 100081, Peoples R China

[3] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 09期

关键词：

ELECTRODE MATERIALS; LITHIUM; REACTIVITY;

D O I：

10.1021/jp111015j

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：

Energy storage was realized on the interfaces between Fe and Li3PO4 nanograins in situ fabricated by discharging commercial LiFePO4 to 0.005 V vs Li+/Li. X-ray diffraction and high-resolution transmission electron microscopy indicate that both the metallic Fe and Li3PO4 nanocrystallites are stable up to 4.2 V. The solid electrolyte interphase layer on the nanocomposite does not decompose until 1.7 V according to infrared spectroscopic analysis. The Fe/Li3PO4 nanocomposite stores up to 220 mAh g(-1) of lithium without any electrochemical reactions. This is a purely lithium storage behavior distinct from that on the electrodes of supercapacitors or traditional secondary batteries.

引用

页码：3803 / 3808

页数：6

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