Scalable synthesis of Na2MVF7 (M = Mn, Fe, and Co) as high-performance cathode materials for sodium-ion batteries

We demonstrate an economical polytetrafluoroethylene-assisted fluorination method to synthesize three binary sodium-rich fluorides Na2MVF7 (M = Mn, Fe, and Co). The optimal Na2FeVF7 cathode delivers a high reversible capacity of...

Peapod-like architectures with CuO microspheres encapsulated within MXene as conversion electrode for lithium-ion batteries

Conversion electrode materials allow for lithium ion batteries to achieve high reversible capacity, but bring the problem of sluggish kinetic derived from the insulating decomposition products, hindering their future application....

UIO-66-NH2-derived mesoporous carbon used as a high-performance anode for the potassium-ion battery

The N-doped mesoporous carbon material prepared by a double-solvent diffusion pyrolysis method with UIO-66-NH2 as a precursor can deliver a high reversible capacity of 346 mA h g−1 at 100 mA g−1 when used as an anode for non-aqueous KIBs.

A multilayered sturdy shell protects silicon nanoparticle Si@void C@TiO2 as an advanced lithium ion battery anode

A functional double layer Si-based multi-component structure Si@void C@TiO2 was designed as anode material for lithium-ion batteries with high reversible capacity and long cycle stability.

A Rechargeable Na/Cl Battery

Sodium is a promising anode material for batteries due to its low standard electrode potential, high abundance and low cost. In this work, we report a new rechargeable ~ 3.5 V sodium ion battery using Na anode, amorphous carbon-nanosphere cathode and a starting electrolyte comprised of AlCl3 in SOCl2 with fluoride-based additives. The battery, exhibiting ultrahigh ~ 2800 mAh/g first discharge capacity, could cycle with a high reversible capacity up to ~ 1000 mAh/g. Through battery cycling, the electrolyte evolved to contain NaCl, various sulfur and chlorine species that supported anode’s Na/Na+ redox and cathode’s chloride/chlorine redox. Fluoride-rich additives were important in forming a solid-electrolyte interface, affording reversibility of the Na anode for a new class of high capacity secondary Na battery.