ELECTRODE-ELECTROLYTE SOLUTION INTERACTIONS BETWEEN TIO2 NANOTUBE ELECTRODE AND NONAQUEOUS ELECTROLYTES FOR SODIUM-ION BATTERIES

摘要

Sodium-ion battery technology presents a promising sustainable alternative to the current dominating lithium-ion battery technology due to its low cost associated with its high earth abundance. Na-ion batteries are best suited to large-scale stationary storage coupled with renewable energy production where the energy production is intermittent. Although a variety of structures with promising features in terms of capacity and voltage for potential cathodes have been identified, few materials are reported to be useful as anodes due to the formation of the unstable solid electrolyte interphase (SEI).1-3 It has been shown that the interfacial chemistry between anodes and sodium-based or lithium-based electrolytes have markedly different effect even when using the same solvent.4-5 It is important that we conduct more fundamental studies to elucidate the mechanisms of electrode and electrolyte interactions and formation of SEI at low potentials for anodes.