ChemInform Abstract: Olivine LiCoPO₄ as 4.8 V Electrode Material for Lithium Batteries.

Abstract

potentials, cells, elements potentials, cells, elements (inorganic) F 3000 -012Olivine LiCoPO 4 as 4.8 V Electrode Material for Lithium Batteries.-The title compound is synthesized from a stoichiometric mixture of Li 2 CO 3 , Co 3 O 4 , and (NH 4 ) 2 HPO 4 by slow calcination at 350 • C for 9 h and subsequent heat treatment at 750 • C (30 h). The compound adopts the olivine type structure.This structure contains chains of edge-sharing cobalt-centered octahedra connected to one another by phosphate tetrahedra. These (CoPO 4 ) − chains are interconnected by octahedrally coordinated lithium atoms. Reversible extraction and insertion of lithium from and into olivine LiCoPO 4 at 4.8 V vs. lithium make this material a good candidate for use in high-voltage lithium ion batteries. -(AMINE, K.; YASUDA, H.; YAMACHI, M.; Electrochem.

Electrochemical reduction of silver vanadium phosphorous oxide, Ag2VO2PO4: Silver metal deposition and associated increase in electrical conductivity

“…(19, 20, 21, 22, 23, 24, 25, 26, 27) These phosphate-based materials demonstrate high levels of chemical and structural stability in lithium based batteries while providing adequate voltage and capacity despite their inherently low electrical conductivity. (28, 29, 30, 31) We recently released the first report on the electrochemistry of silver vanadium phosphorous oxide (Ag 2 VO 2 PO 4 , SVPO) in lithium batteries. (32) SVPO was deliberately selected for consideration in next generation implantable device batteries anticipating several promising characteristics: 1) high chemical stability consistent with that observed in other phosphate cathode materials, 2) high capacity due to the multiple electron transfer present in bimetallic materials, 3) high conductivity exceeding that of other phosphate based materials due to in-situ generation of a conductive silver matrix.…”

Dynamically visualizing battery reactions by operando Kelvin probe force microscopy

“…In the anode, LATP works as an active material 24 . This battery operates at $2.3 V [from LCP (4.8 V vs. Li/Li+) 25,26 to LATP (2.5 V vs. Li/Li+)]. LCP and LATP (a NASICON-type solid electrolyte) are known to react with each other during co-sintering at high temperature 27,28 .…”

Synthesis and characterization of metastable, 20 nm-sized Pna 2 1 -LiCoPO 4 nanospheres

“…[4][5][6] have been undertaken to optimize the electrochemical performance of the material, which is redox active at ~4.8 V vs. Li/Li + . 7 Recently, we have reported 8 a facile, onestep microwave-assisted solvothermal (MWST) route towards high-performance LiCoPO4 hexagonal platelets using a mixed 1:1 (v:v) water/ethylene glycol (EG) solvent. The optimized material delivers a specific capacity of 137 mAh/g and an energy density of 658 Wh/kg, which is one of the best performances reported to date.…”