SUMMARY

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There is a critical impediment to the practical use of lithium (Li)-ion batteries (LIBs) at low temperature conditions owing to the slow diffusion of Li-ions in graphite anode and metallic Li-plating issue on the graphite anode surface. The promising strategy to resolve these hindrances is the transition of the charge storage mechanism from the diffusive intercalation to the surface-controlled capacitive charge storage mechanism that has fast charge storage kinetics. Here, the structure-controlled 3D graphene-based electrode prepared by controlling the stacking process of the graphene sheets via an aerosol drying process. The key processing parameters to control the physical and chemical structures of graphene were identified to promote the surface-charge storage mechanism. The electrochemical analysis was employed to quantitatively evaluate the portion of the surface-charge storage mechanism of electrodes as a function of potential and temperature. This study is to demonstrate that the 3D structured electrodes can effectively utilize the surface-charge storage mechanism for improving the charge storage kinetics and structural stability under low-temperature conditions.
The use of Li metal anodes in all-solid-state batteries (ASSBs) has emerged as the promising technology for replacing conventional LIBs. Here, a new class of solid-state electrolytes (SSEs) will be discussed to design 3D structured SSEs with an unprecedented combination of mechanical robustness and high ionic conductivity.