Ionogel electrolytes based on ionic liquids and gelling solid matrices offer several advantages for solid-state lithium batteries, including nonflammability, wide processing compatibility, and favorable electrochemical and thermal properties. However, existing ionogel electrolytes have not yet achieved battery performance comparable to that of liquid electrolytes used for conventional lithium batteries, necessitating continuous research efforts to explore more possibilities of ionogel electrolytes. Moreover, additional correlated experimental and theoretical studies are required to elucidate the fundamentals of ionogel electrolytes, offering a framework for rationally guiding future development of ionogel electrolytes. To fill the gap in the ionogel electrolyte technology, our research group has developed novel ionogel electrolytes based on two-dimensional hydroxide nanosheets, which not only provides the fundamental understanding of unexplored interaction mechanism between hydroxide nanosheets and ionic liquids, but also allows to address traditional challenges (e.g., poor mechanical strength, low ionic conductivity and lithium transference number) of ionogel electrolytes for solid-state lithium battery applications. The ionogel electrolyte system based on two-dimensional hydroxide nanosheets will serve as an important platform to study interactions between solid matrices and ionic liquids, improve ionogel electrolyte properties, and develop high-performance solid-state lithium batteries.