Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (04): 665-669.doi: 10.3866/PKU.WHXB20080420

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Electrochemical Behavior of Aluminium Electrode in LiNO3-KNO3 Molten Salt

TU Xiao-Hua; CHU You-Qun; MA Chun-An; MO Yi-Ping; CHEN Zhao-Yang   

  1. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310032, P. R. China; Hangzhou Shengyuan Medical and Health-Keeping Technology Developing Co., Ltd., Hangzhou 310012, P. R. China
  • Received:2007-10-15 Revised:2007-12-17 Published:2008-04-07
  • Contact: MA Chun-An

Abstract: The electrochemical behavior of aluminium in LiNO3-KNO3 molten salt electrolyte was studied by means of cyclic voltammetry and potentiostatic electrolysis. It was shown that the electrochemical reduction of Li+ at the aluminium electrode was followed by the diffusion of the nascent Li atom formed at the electrode surface into aluminiummatrix; and the β-phase and γ-phase Li-Al alloys were formed by alloying of Li atomwith Al; the electrode process was controlled by the diffusion of Li atom into Al matrix. The cyclic voltammetric experiments showed that both reductive peak current and oxidative peak current increased firstly with the increase of cycles, and then reached to a constant value after certain cycles. This indicated that the aluminium electrode had good electrochemical stability in the LiNO3-KNO3 molten salt electrolyte.

Key words: Aluminiumelectrode, LiNO3-KNO3 molten salt, Cyclic voltammetry, Electrochemical behavior


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