Anion Effects on Crystal Water Reactivity and Cathode-Electrolyte Interphase of Prussian Blue in Sodium-Ion Batteries.

Prussian blue (PB) is a promising low-cost cathode material for sodium-ion batteries (SIBs), but the impact of crystal water on performance degradation remains unclear. This study explores how PB's crystal water interacts with different electrolyte salts-NaClO and NaTFSI-affecting solvation structure and interfacial stability. Based on the Hofmeister series, it is demonstrated that the strong hydration of ClO sustains water reactivity, promoting Fe oxidation and solvent decomposition at high voltages.

Spinodal Decomposition Method for Structuring Germanium-Carbon Li-Ion Battery Anodes.

To increase the energy density of lithium-ion batteries (LIBs), high-capacity anodes which alloy with Li ions at a low voltage against Li/Li have been actively pursued. So far, Si has been studied the most extensively because of its high specific capacity and cost efficiency; however, Ge is an interesting alternative. While the theoretical specific capacity of Ge (1600 mAh g) is only half that of Si, its density is more than twice as high (Ge, 5.

A Review of Functional Separators for Lithium Metal Battery Applications.

Lithium metal batteries are considered "rough diamonds" in electrochemical energy storage systems. Li-metal anodes have the versatile advantages of high theoretical capacity, low density, and low reaction potential, making them feasible candidates for next-generation battery applications. However, unsolved problems, such as dendritic growths, high reactivity of Li-metal, low Coulombic efficiency, and safety hazards, still exist and hamper the improvement of cell performance and reliability.