Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effect of Alloying Elements on the Electrochemical Characteristics of an Al Alloy Electrode for Al-air Batteries in 4 M NaOH solution

  • Choi, Yun-Il (Department of Materials Science and Engineering, Chonnam National University) ;
  • Kalubarme, R.S. (Department of Materials Science and Engineering, Chonnam National University) ;
  • Jang, Hee-Jin (Department of Metallurgical and Materials Engineering, Chosun University) ;
  • Park, Chan-Jin (Department of Materials Science and Engineering, Chonnam National University)
  • Received : 2011.07.22
  • Published : 2011.11.25
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Abstract

We examined the effects of alloying elements such as Fe, Ga, In, Sn, Mg, and Mn on the electrochemical characteristics of Al-based alloys for Al-air batteries by potentiodynamic polarization tests and electrochemical impedance spectroscopy. The corrosion potential of an Al anode was lowered by the addition of Ga and Sn, resulting in an increase in the cell voltage compared with a pure Al electrode. Fe was not beneficial to improve the electrochemical properties of the Al anode in that it caused a decrease in the cell voltage and reduced corrosion rate slightly. In, Mn, Sn, and Mg decreased the corrosion rate of the Al alloys, while Ga enhanced corrosion significantly and accelerated consumption of the anode.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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