Electrochemical hydrogen storage behaviors of nanostructured La1-xSrxCoO3 (x = 0-1.0) prepared by sol-gel method

DOI

10.2991/imst-16.2016.58How to use a DOI?

Keywords

strontium substitution; perovskite; electrochemical properties.

Abstract

The La1-xSrxCoO3 perovskite oxides were synthesized by a sol-gel method, the electrochemical properties of them were studied as negative electrodes for nickel-metal hydride batteries in aqueous KOH solution. The results show that the electrode with the Sr content of x = 1.0 shows the best performance among the as-prepared materials, whose maximum discharge capacity is 103.5 mAh g-1 and the capacity remains 100 mAh g-1 after 20 cycles at the discharge current density 100 mA g-1, the retention rate is 97.1%. The possible existence of strong chemisorption of hydrogen may lead to the lower discharge capacity of nanoparticles according to CV results. Analysis of electrode reaction mechanism demonstrates that the discharge capacity is attributed to the valence change of Co ions, so the electrocatalytic activity can be enhanced by A site metal substitution.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Peng Yan
AU  - Yanyan Bao
AU  - Chunyu Qiao
AU  - Dianxue Cao
AU  - Guiling Wang
PY  - 2016/11
DA  - 2016/11
TI  - Electrochemical hydrogen storage behaviors of nanostructured La1-xSrxCoO3 (x = 0-1.0) prepared by sol-gel method
BT  - Proceedings of the 2016 International Conference on Innovative Material Science and Technology (IMST 2016)
PB  - Atlantis Press
SP  - 390
EP  - 397
SN  - 1951-6851
UR  - https://doi.org/10.2991/imst-16.2016.58
DO  - 10.2991/imst-16.2016.58
ID  - Yan2016/11
ER  -