Insights into the emerging alternative polymer-based electrolytes for all solid-state lithium-ion batteries: A review

Solid-state polymer electrolytes are recognized to be potential candidate for lithium (Li)-ion batteries for enhanced operational safety. Replacing the existing liquid-based electrolytes with solid state polymer electrolytes can possibly avoid the thermal runaway, explosions and short circuiting in batteries. One of the major problems is the formation of lithium dendrites in the electrodes, where the volatile nature of the combustible organic solvent in liquid electrolytes leads to potential threats to the safety-risk in lithium-ion batteries. In order to reduce such safety-risks, the solid electrolytes, which are mechanically and thermally strong, should be introduced in Li-ion batteries. In this direction, the polymer-based solid-state electrolytes can be ideal as they intrinsically establish stronger interface between electrode and electrolyte, where they also possess improved electrochemical properties. These characteristics of the polymer-based electrolytes can possibly take the batteries for high-performance operations and usages in the near future.