Department of Energy Engineering (Battery Science and Technology)As the applications of lithium-ion batteries (LIBs) are expanding from mobile electronic devices to electrical vehicles (EVs) and energy storage systems (ESSs), concerns about their safety hazard also increased. The safety issues for LIBs are originated from flammable organic liquid electrolytes. In this regard, all-solid-state lithium-ion batteries (ASLBs) employing nonflammable inorganic solid electrolytes (SEs) have emerged as a promising alternative. In another aspect, as the price of Li sources soared, Na-ion batteries (NIBs) are considered to be promising next-generation batteries especially for ESS application. Due to similarities of NIBs to LIBs in terms of chemistry/electrochemistry, extensive research efforts have been focused on NIBs in recent years. Furthermore, development of Na-ion conducting SEs opened a research field for all-solid-state Na-ion batteries (ASNBs).
Herein, the highly conductive Ca-doped Na3PS4 SEs and their use for bulk-type ASNBs will be presented in this thesis.ope
