Electrochemical hydrogenation of nanocrystalline face-centered cubic Co powder

被引：29

作者：

Chung, S. -R. ^{[1
]}

Wang, K. -W. ^{[2
]}

Teng, M. -H. ^{[3
]}

Perng, T. -P. ^{[1
,4
,5
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

[2] Natl Cent Univ, Inst Mat Sci & Engn, Chungli 320, Taiwan

[3] Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan

[4] Yuan Univ, Dept Chem Engn & Mat Sci & Engn, Chungli 320, Taiwan

[5] Yuan Univ, Fuel Cell Res Ctr, Chungli 320, Taiwan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 03期

关键词：

Electrochemical hydrogenation; Co; Discharge capacity; FCC; HCP; METAL HYDRIDE ELECTRODES; STORAGE ALLOYS; CRYSTALLINE CO; PARTICLES; REDUCTION; BEHAVIORS; BATTERIES; LITHIUM; SI;

D O I：

10.1016/j.ijhydene.2008.11.073

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：

Nanocrystalline face-centered cubic (FCC) Co powder encapsulated within graphite layers was fabricated by an arc discharge method. Its electrochemical hydrogenation properties were investigated and compared with those of the hexagonal close packed (HCP) structure. Both exhibited a similar stabilized discharge capacity of approximately 350 mAh/g that can be attributed to the CoHx/Co reaction. During the cyclic charge/discharge, transition between HCP-Co and FCC-Co took place. Graphite encapsulation was beneficial to the cycle stability of the FCC powder. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：1383 / 1388

页数：6

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