Surface structure and electrochemical properties of surface-fluorinated petroleum cokes for lithium ion battery

被引：35

作者：

Nakajima, T ^{[1
]}

Li, JL ^{[1
]}

Naga, K ^{[1
]}

Yoneshima, K ^{[1
]}

Nakai, T ^{[1
]}

Ohzawa, Y ^{[1
]}

机构：

[1] Aichi Inst Technol, Dept Appl Chem, Toyota 4700392, Japan

来源：

JOURNAL OF POWER SOURCES | 2004年 / 133卷 / 02期

基金：

日本学术振兴会;

关键词：

fluorination; surface modification; carbon electrode; lithium ion battery;

D O I：

10.1016/j.jpowsour.2004.02.006

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：

Surface structure and electrochemical behavior of surface-fluorinated petroleum coke samples (original petroleum coke and those heat-treated at 1860, 2300 and 2800degreesC, abbreviated to original PC, PC 1860, PC2300 and PC2800, respectively) have been investigated. Surface fluorination of petroleum cokes by elemental fluorine reduced surface oxygen. Surface areas of fluorinated petroleum cokes were nearly the same as those of non-fluorinated ones or only slightly increased by fluorination except original PC fluorinated at 300degreesC. Total meso-pore volumes of fluorinated samples showed the same trend. The charge capacity of non-fluorinated petroleum coke was increased by heat-treatment at 2300 and 2800degreesC. However, the first coulombic efficiency was the highest, 90-89% in PC1860, decreasing to 72-70 and 65-64% for PC2300 and PC2800, respectively. It is noted that first coulombic efficiencies were increased by 12-18% for PC2300 and PC2800 fluorinated at 300degreesC, (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：243 / 251

页数：9

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