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Issue 27, 2011
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Electrochemical behavior and passivation of current collectors in lithium-ion batteries

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Abstract

This paper examines several metals that are commonly employed as current collectors of positive and negative electrodes for rechargeable lithium batteries. Current collectors must be electrochemically stable when in contact with the cell component during the potential operation window of an electrode. Various electrochemical techniques have been used to investigate the corrosion of current collector materials. In practice, continued corrosion of current collectors leads to a gradual increase in the internal resistance of cells, which causes the capacity to fade gradually. Corrosion of the current collector may induce a short-circuit, affecting its safety. Thus, the formation of thick and compact, protective passive film on the metal surface is highly important so as to ensure battery performance and safety. Depending on the salts and additives, different types of protective films are formed. The solubility of these surface layers in the electrolyte is a determining factor in the overall stability of the current collector. In this review, we introduce the electrochemical behavior and protective film formation processes of various metallic current collectors in representative electrolytes.

Graphical abstract: Electrochemical behavior and passivation of current collectors in lithium-ion batteries

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Publication details

The article was received on 13 Dec 2010, accepted on 29 Mar 2011 and first published on 04 May 2011


Article type: Feature Article
DOI: 10.1039/C0JM04353B
Citation: J. Mater. Chem., 2011,21, 9891-9911
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    Electrochemical behavior and passivation of current collectors in lithium-ion batteries

    S. Myung, Y. Hitoshi and Y. Sun, J. Mater. Chem., 2011, 21, 9891
    DOI: 10.1039/C0JM04353B

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