Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys

Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys

The effects of yttrium substitution for magnesium in the La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys on the electrochemical properties are investigated in this paper. Yttrium substitution in the alloys can significantly improve the cycle stability, although the discharge capacity was decreased. The...

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Main Authors: Huaiwei Zhang, Li Fu, Jianbo Qi
Format: Article
Language:English
Published: Elsevier 2019-05-01
Series:Journal of Materials Research and Technology
Online Access:http://www.sciencedirect.com/science/article/pii/S2238785418311700
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spelling doaj-747f96fdae524ae091b173cbc9fea7ad2020-11-25T03:26:09ZengElsevierJournal of Materials Research and Technology2238-78542019-05-018333823387Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloysHuaiwei Zhang0Li Fu1Jianbo Qi2College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China; Corresponding authors.College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR ChinaSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, PR China; Corresponding authors.The effects of yttrium substitution for magnesium in the La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys on the electrochemical properties are investigated in this paper. Yttrium substitution in the alloys can significantly improve the cycle stability, although the discharge capacity was decreased. The capacity and retention capacity after 20th cycle of the La2Mg0.9Y0.1Ni8.8Co0.2 alloys achieved values above 370 mAh/g and 95%, respectively, which already exceed those of most hydrogen storage alloys with A2B7 or AB3 structure. The charge-transfer resistance also reached the lowest when x was 0.1 in the La2Mg1−xYxNi8.8Co0.2 alloy, resulting in the highest charge transfer rate. Keywords: Energy storage and conversion, Elemental substitution, Metals and alloys, Ni/MH batteryhttp://www.sciencedirect.com/science/article/pii/S2238785418311700
collection DOAJ
language English
format Article
sources DOAJ
author Huaiwei Zhang
Li Fu
Jianbo Qi
spellingShingle Huaiwei Zhang
Li Fu
Jianbo Qi
Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys
Journal of Materials Research and Technology
author_facet Huaiwei Zhang
Li Fu
Jianbo Qi
author_sort Huaiwei Zhang
title Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys
title_short Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys
title_full Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys
title_fullStr Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys
title_full_unstemmed Effects of yttrium substitution for magnesium on the electrochemical performances of La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys
title_sort effects of yttrium substitution for magnesium on the electrochemical performances of la2mg1−xyxni8.8co0.2 hydrogen storage alloys
publisher Elsevier
series Journal of Materials Research and Technology
issn 2238-7854
publishDate 2019-05-01
description The effects of yttrium substitution for magnesium in the La2Mg1−xYxNi8.8Co0.2 hydrogen storage alloys on the electrochemical properties are investigated in this paper. Yttrium substitution in the alloys can significantly improve the cycle stability, although the discharge capacity was decreased. The capacity and retention capacity after 20th cycle of the La2Mg0.9Y0.1Ni8.8Co0.2 alloys achieved values above 370 mAh/g and 95%, respectively, which already exceed those of most hydrogen storage alloys with A2B7 or AB3 structure. The charge-transfer resistance also reached the lowest when x was 0.1 in the La2Mg1−xYxNi8.8Co0.2 alloy, resulting in the highest charge transfer rate. Keywords: Energy storage and conversion, Elemental substitution, Metals and alloys, Ni/MH battery
url http://www.sciencedirect.com/science/article/pii/S2238785418311700
work_keys_str_mv AT huaiweizhang effectsofyttriumsubstitutionformagnesiumontheelectrochemicalperformancesofla2mg1xyxni88co02hydrogenstoragealloys
AT lifu effectsofyttriumsubstitutionformagnesiumontheelectrochemicalperformancesofla2mg1xyxni88co02hydrogenstoragealloys
AT jianboqi effectsofyttriumsubstitutionformagnesiumontheelectrochemicalperformancesofla2mg1xyxni88co02hydrogenstoragealloys
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