All-solid-state lithium-ion batteries have been pursued for many years and offer several important advantages over commercial lithium-ion batteries with liquid organic electrolytes (including improved safety, higher energy densities and wider operating temperatures). The improved reliability of all-solid-state lithium-ion batteries make them appealing for large-scale applications. However, for all-solid-state lithium-ion batteries with inorganic solid-state electrolytes, key challenges remain, such as the volume change in the electrodes, interfacial charge-transfer resistance, flexibility concerns and poor cycling stability. Solid polymer electrolytes overcome some of the limitations of the inorganic solid-state electrolytes (that is, they have good shape flexibility and contact with the electrodes), but they have narrow electrochemical stability windows and low ionic conductivity (at room temperature), which currently impede the development of polymer-based all-solid-state lithium-ion batteries. RISE will focus on developing various solid electrolytes starting from oxides to sulfides to halides to polymer along with engineering the interface and catering to fundamental challenges. RISE is also developing a solid-state pouch cell assembly all inside the glove boxes.
