Microstructures and Electrochemical Properties of La0.7Ce0.3Ni3.7Co0.7-xAl0.2Mn0.4(Fe0.43B0.57)x (x = 0-0.4) Hydrogen Storage Alloys

Yu Zhou; Yan Ping Fan; Xian Yun Peng; Bao Zhong Liu

doi:10.4028/www.scientific.net/AMR.608-609.917

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Microstructures and Electrochemical Properties of La_0.7Ce_0.3Ni_3.7Co_0.7-xAl_0.2Mn_0.4(Fe_0.43B_0.57)_x (x = 0-0.4) Hydrogen Storage Alloys
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 608-609Microstructures and Electrochemical Properties of...

Microstructures and Electrochemical Properties of La_0.7Ce_0.3Ni_3.7Co_0.7-xAl_0.2Mn_0.4(Fe_0.43B_0.57)_x (x = 0-0.4) Hydrogen Storage Alloys

Abstract:

X-ray diffraction results indicate that pristine alloy has a single LaNi5 phase and the alloys containing Fe0.43B0.57 consist of the matrix LaNi5 phase and the La3Ni13B2 secondary phase. The abundance of La3Ni13B2 phase increases with increasing x value. Maximum discharge capacity of the alloy electrodes monotonically decreases from 336.1 mAh/g (x = 0) to 281.2 mAh/g (x = 0.4). High-rate dischargeability of the alloy electrodes first increases with increasing x from 0 to 0.20, and then decreases when x increases to 0.4. Cycling stability decreases with increasing x from 0 to 0.4.

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Periodical:

Advanced Materials Research (Volumes 608-609)

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917-920

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.608-609.917

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Online since:

December 2012

Authors:

Yu Zhou*, Yan Ping Fan, Xian Yun Peng, Bao Zhong Liu

Keywords:

Electrochemical Property, Hydrogen Storage Alloy, Ni/MH Batteries, Phase Structure

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