CTAB-Influenced Electrochemical Dissolution of Silver Dendrites (original) (raw)

Langmuir : the ACS journal of surfaces and colloids, 2016

Abstract

Dendrite formation on the electrodes of a rechargeable battery during the charge-discharge cycle limits its capacity and application due to short-circuits and potential ignition. However, our understanding of the underlying dendrite growth and dissolution mechanisms is unclear. Here, the electrochemical growth and dissolution of silver dendrites on platinum electrodes immersed in an aqueous silver nitrate (AgNO3) electrolyte solution was investigated using in-situ liquid-cell transmission electron microscopy. The dissolution of Ag dendrites in an AgNO3 solution with added cetyltrimethylammonium bromide (CTAB) surfactant was compared to the dissolution of Ag dendrites in a pure aqueous AgNO3 solution. Significantly, when CTAB was added, dendrite dissolution proceeded in a step-by-step manner, resulting in nanoparticle formation and transient micro-growth stages due to Ostwald ripening. This resulted in complete dissolution of dendrites and "cleaning" of the cell of any silv...

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