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Effect of Ce content on structure and electrochemical properties of La0.8–x Ce x Pr0.1Nd0.1B5 (B = Ni, Co, Mn; 0 ⩽ x ⩽ 0.3) hydrogen storage alloys

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Abstract

The structure and electrochemical properties of La0.8–x Ce x Pr0.1Nd0.1B5 (B5 ≡ Ni3.8Co1.1Mn0.1; x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys have been investigated. The results show that all alloys consist of CaCu5-type single phase. The maximum discharge capacity of the alloy electrodes decreases from 368.7 mA h g–1 (x = 0) to 294.9 mA h g–1 (x = 0.30), the cyclic stability (S100) increases from 37.6% (x = 0) to 69.8% (x = 0.20) after 100 charge/discharge cycles, and the HRD1200 first increases from 69.5% (x = 0) to 85.2% (x = 0.20), then decreases to 80.8% (x = 0.30). Meanwhile, the electrochemical kinetic characteristics of the La0.8‒x Ce x Pr0.1Nd0.1B5 alloy electrodes are also improved by increasing Ce content.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China

    J. Y. Hu, H. Y. Zhou, P. Liu, Q. R. Yao, J. Q. Deng & Z. M. Wang

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  1. J. Y. Hu
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  2. H. Y. Zhou
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  3. P. Liu
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  4. Q. R. Yao
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  5. J. Q. Deng
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  6. Z. M. Wang
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Correspondence to H. Y. Zhou.

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Published in Russian in Elektrokhimiya, 2016, Vol. 52, No. 2, pp. 195–200.

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Hu, J.Y., Zhou, H.Y., Liu, P. et al. Effect of Ce content on structure and electrochemical properties of La0.8–x Ce x Pr0.1Nd0.1B5 (B = Ni, Co, Mn; 0 ⩽ x ⩽ 0.3) hydrogen storage alloys. Russ J Electrochem 52, 169–173 (2016). https://doi.org/10.1134/S1023193515090074

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  • DOI: https://doi.org/10.1134/S1023193515090074

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