Pyrocarbon-coating on powdery hard-carbon using chemical vapor infiltration and its electrochemical characteristics

被引：45

作者：

Ohzawa, Y ^{[1
]}

Yamanaka, Y ^{[1
]}

Naga, K ^{[1
]}

Nakajima, T ^{[1
]}

机构：

[1] Aichi Inst Technol, Dept Appl Chem, Toyota 5700392, Japan

来源：

JOURNAL OF POWER SOURCES | 2005年 / 146卷 / 1-2期

关键词：

lithium ion battery; chemical vapor deposition; carbon coating;

D O I：

10.1016/j.jpowsour.2005.03.009

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：

Using the pressure-pulsed chemical vapor infiltration technique, thin pyrocarbon films were coated on the surface of the hard-carbon particles. The crystallinity of pyrocarbon shell was higher than that of the core carbon. The BET surface area and the pores with the diameter of 1.5-5 nm were extremely decreased after coating with 7 wt.% pyrocarbon. These changes in the nano-scaled structure of carbon surface could lead to the reduction of irreversible capacity. The cycleability was improved by pyrocarbon-coating, which would be attributed to the increase of the surface roughness on sub-micron scale by coating with the pebble-like pyrocarbon film to increase the adhesion among the particles by the organic binders. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：125 / 128

页数：4

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