Effect of electrolyte concentration on low-temperature electrochemical properties of LaNi5 alloy electrodes at 233 K

Effect of electrolyte concentration on low-temperature electrochemical properties of LaNi5 alloy electrodes at 233 K

The effect of KOH electrolyte concentration on low-temperature electrochemical properties of LaNi5 alloy electrodes at 233 K was studied. The results indicated that the electrolyte concentration had great influence on discharge capacity and discharge voltage plateau of LaNi5 alloy electrode at 233 K...

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Veröffentlicht in:Journal of rare earths 2008-06, Vol.26 (3), p.402-405
1. Verfasser: 张晓燕 陈云贵 陶明大 吴朝玲
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低温现象
氧储存
电化学
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description The effect of KOH electrolyte concentration on low-temperature electrochemical properties of LaNi5 alloy electrodes at 233 K was studied. The results indicated that the electrolyte concentration had great influence on discharge capacity and discharge voltage plateau of LaNi5 alloy electrode at 233 K, and the highest discharge capacity and discharge voltage plateau were both obtained at 6 mol/L KOH. When the KOH electrolyte concentration changed from 5 to 9 mol/L at 233 K, the high rate discharge ability （HRD） had the same change tendency as the diffusion coefficient, but the exchange current density did not change significantly, which implied that hydrogen diffusion was the control step at low temperature 233 K for discharge process of LaNi5 alloy electrode.
doi_str_mv 10.1016/S1002-0721(08)60105-2
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When the KOH electrolyte concentration changed from 5 to 9 mol/L at 233 K, the high rate discharge ability （HRD） had the same change tendency as the diffusion coefficient, but the exchange current density did not change significantly, which implied that hydrogen diffusion was the control step at low temperature 233 K for discharge process of LaNi5 alloy electrode.</description><identifier>ISSN: 1002-0721</identifier><identifier>EISSN: 2509-4963</identifier><identifier>DOI: 10.1016/S1002-0721(08)60105-2</identifier><language>eng</language><publisher>School of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China</publisher><subject>低温现象 ; 氧储存 ; 电化学</subject><ispartof>Journal of rare earths, 2008-06, Vol.26 (3), p.402-405</ispartof><rights>Copyright © Wanfang Data Co. Ltd. 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subjects 低温现象
氧储存
电化学
title Effect of electrolyte concentration on low-temperature electrochemical properties of LaNi5 alloy electrodes at 233 K
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