Designing functional LiCuO-coated separators from Cu foil towards spent LiFePO cathode regeneration.

A chemical-physical investigation proved that the loss of active Li represents the main mechanism of capacity-fading in spent LiFePO. Given this, functional LiCuO-coated separators were fabricated from spent Cu foil and found to contribute to the regeneration of spent LiFePO in a full-cell system. This study presents a novel method for cathode/Cu foil recovery.

Designing Sphere-like FeSe-Carbon Composites with Rational Construction of Interfacial Traits towards Considerable Sodium-storage Capabilities.

Due to their low cost and high stability, sodium-ion batteries have been increasingly studied. However, their further development is limited by the relative energy density, resulting in the search for high-capacity anodes. FeSe displays high conductivity and capacity but still suffers from sluggish kinetics and serious volume expansion.

Controlling of Ni-Based Composites in Salt Melt Synthesis with High Sodium-Ion Storage Performance.

Owing to its fascinating properties (such as high theoretical specific capacity and considerable conductivity), nickel sulfide (NiS) was investigated comprehensively as an anode material in sodium-ion batteries. However, they still suffered from volume expansion and sluggish kinetics, resulting in serious cycle capabilities. Herein, through controlling the kind of molten salts (NaSO, NaCl, and NaCO) in salt melt synthesis (SMS), a series of NiS with an N, S-codoped carbon layer was successfully prepared, accompanied with different morphologies and structures (earthworm-like belts and triangular and spherical particles).