Reversible multielectron redox activity of the anti-NASICON-type phosphate LiNbV(PO) towards lithium and sodium intercalation.

The LiNbV(PO) phosphate with the anti-NASICON structure ( = 12.126(1) Å, = 8.6158(4) Å, = 8.

NaNbV(PO): Multielectron NASICON-Type Anode Material for Na-Ion Batteries with Excellent Rate Capability.

NASICON-type NaNbV(PO) electrode material synthesized by the Pechini sol-gel technique undergoes a reversible three-electron reaction in a Na-ion cell which corresponds to the Nb/Nb, Nb/Nb, and V/V redox processes and provides a reversible capacity of 180 mAh·g. The sodium insertion/extraction takes place in a narrow potential range at an average potential of 1.55 V versus Na/Na.

Synthesis and electrochemical performance of Li2Co1- x M x PO4F (M = Fe, Mn) cathode materials.

In the search for high-energy materials, novel 3D-fluorophosphates, Li2Co1- x Fe x PO4F and Li2Co1- x Mn x PO4F, have been synthesized. X-ray diffraction and scanning electron microscopy have been applied to analyze the structural and morphological features of the prepared materials. Both systems, Li2Co1- x Fe x PO4F and Li2Co1- x Mn x PO4F, exhibited narrow ranges of solid solutions: x ≤ 0.

Ordering of Pd(2+) and Pd(4+) in the mixed-valent palladate KPd(2)O(3).

A new potassium palladate KPd(2)O(3) was synthesized by the reaction of KO(2) and PdO at elevated oxygen pressure. Its crystal structure was solved from powder X-ray diffraction data in the space group R3m (a = 6.0730(1) A, c = 18.