Corrosion and protection of aluminum current collector in lithium-ion batteries

Abstract

<p>Aluminum (Al) current collector, an important component of lithium-ion batteries (LIBs), plays a crucial role in affecting electrochemical performance of LIBs. In both working and calendar aging of LIBs, Al suffers from severe corrosion issue, resulting in the decay of electrochemical performance. However, few efforts are devoted to the research of Al compared to anode and cathode materials, electrolyte, and even separators in LIBs. Here, the recent research advance in Al corrosion and protection is reviewed. We first briefly overview Al corrosion mechanism and its affecting factors. Then, the advanced technologies used to evaluate the electrochemical, morphology and chemical properties of Al are summarized in order to uncover the Al corrosion mechanism in LIBs. Next, we review the Al protection strategies in Al, electrolyte, and inhibitors with function mechanism, materials selection and their structural design. Finally, we outlook the future research direction in Al corrosion and protection. This review provides experimental and theoretical supports in understanding Al corrosion and development of Al anticorrosion, which will be beneficial to the research communities including corrosions, advanced materials, and energy storage devices.</p>