Synthesis of cathode material such as LiNiVO.sub.4 and LiCoVO.su

Details Synthesis of cathode material such as LiNiVO.sub.4 and LiCoVO.su Synthesis of cathode material such as LiNiVO.sub.4 and LiCoVO.su

1994-05-13

1996-01-23

Bos, Steven

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

429218, 429223, C01G 5100, C01G 5300, H01M 458, H01M 452

Patent

active

054863465

ABSTRACT:
A method for preparing cathode material for use in lithium secondary batteries comprising the steps of: (a) mixing first and second reactants in a appropriate stoichiometric ratio to form a reaction mixture, wherein the first reactant is represented by Li.sub.x MO.sub.2, M is either Ni or Co, and x is a variable from 0.25 to 1.1, and the second reactant is V.sub.2 O.sub.3 ; V.sub.2 O.sub.5, or NH.sub.4 VO.sub.3, and (b) sintering the mixture in air at temperatures between 650.degree. C..about.700.degree. C. for 1.about.2 hours to obtain a cathode material represented by LiMVO.sub.4. The first reactant can be obtained by an aqueous-phase reaction by mixing a first aqueous solution, which contains M(NO.sub.3).sub.2.6H.sub.2 O, and a second aqueous, which contains LiOH.H.sub.2 O, Li.sub.2 O, Li.sub.2 CO.sub.3, or Li(CH.sub.3 COO), to form a precursory aqueous solution, and drying the precursory aqueous solution. Very high purity cathode materials can be obtained at a substantially reduced reaction time and substantially reduced reaction temperature, both of which will contribute to reduced production cost. The lithium secondary batteries so prepared can provide discharge voltages between 4.5.about.4.9 volts.

REFERENCES:
patent: 4567031 (1986-01-01), Riley
patent: 5196278 (1993-03-01), Idota
patent: 5264201 (1993-11-01), Dahn et al.
patent: 5336572 (1994-08-01), Koksbang
J. C. Bernier et al., "Academie des Sciences" Compt. Rendus., 253, 1961, no month, 1578.
J. C. Berneir et al., "Etude Cristallographique et magnetique de deux vanadates mixtes spinelles" Bull. Soc. Chim. France; 1963, no month, 1661-1666.
J. Preudhomme et al., "Infrared studies of Spinels--IV Normal Spinels with a high-valency tetrahedral cation" Spectrochimica Acta, no month 1972, 69-79.
M. Th. Paques-Ledent, "Correlations entre le type structural et la composition chimique des composes de formule generale ABXO.sub.4 " Ind. Chim. Belg, no month 1974, 845.
Y. Ito, "LiVO.sub.3 -NiO LiNiVO.sub.4 ", no month 1979, Chem. Soc. of Japan, No. 11, pp. 1483-1487.
Y. Ito et al., " LiMVO.sub.4 (M=Co, Ni) .sup.1) 2) " The Chemical Society of Japan, no month 1986, 1069-73, No. 8.
R. J. Hill et al. "Peak Shape Variation in Fixed-Wavelength Neutron Powder Diffraction and its Effect on Structural Parameters Obtained by Rietveld Analysis" J. Appl. Cryst. no month, 1985, 173-80, No. 18.
H. M. Rietveld, "A Profile Refinement Method for Nuclear and Magnetic Structures" J. Appl. Cryst., no month, 1969, 65-71, No. 2.
J. R. Dahn et al., "Dependence of The Electrochemical Intercalation of Lithium in Carbons on the Crystal Structure of the Carbon" Electrochimica Acta, 1993, no month, 1179-91, vol. 38, No. 9.
JCPDS Card 38-1395, 1990, no month.

Affiliated with

Also associated with

Rating

Synthesis of cathode material such as LiNiVO.sub.4 and LiCoVO.su does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synthesis of cathode material such as LiNiVO.sub.4 and LiCoVO.su, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis of cathode material such as LiNiVO.sub.4 and LiCoVO.su will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1503672