Claims
- 1. A process of making a nonaqueous cell comprising a negative electrode, a separator, a positive electrode, and an electrolyte, said positive electrode comprising niobium triselenide, said process including the step of assembling the negative electrode, separator, positive electrode and electrolyte to form a nonaqueous cell,
- CHARACTERIZED IN THAT the positive electrode is made by a procedure that comprises the steps of
- (a) at least once depositing a liquid slurry comprising Nb.sub.2 Se.sub.9 powder on the substrate and removing the liquid from the deposited slurry to form a dry coating of Nb.sub.2 Se.sub.9 powder thereon, said slurry comprising from 10 to 90 weight percent of Nb.sub.2 Se.sub.9, b) heating the substrate with the said coating at a temperature within a range of from 625.degree. and 780.degree. C. and for a period of time ranging from one minute to 25 hours, said temperature and period of time being sufficient to form a layer of fibrous material comprising NbSe.sub.3, and c) using the so-formed fibrous material with or without a metal support therefor as the positive electrode.
- 2. The process of claim 1 in which the temperature range is from 630.degree. C. to 690.degree. C.
- 3. The process of claim 2 in which the temperature range is from 650.degree. C. to 680.degree. C.
- 4. The process of claim 1 wherein the liquid slurry is deposited by spraying and wherein the liquid is removed by a procedure that comprises heating of the substrate with the slurry thereon.
- 5. The process of claim 1 wherein the substrate comprises a material selected from the group consisting of alumina and quartz.
- 6. The process of claim 5 wherein the substrate comprises alumina.
- 7. The process of claim 1 wherein the liquid in the slurry comprises propylene glycol.
- 8. The process of claim 1 wherein the Nb.sub.2 Se.sub.9 powder has particle size finer than about mesh powder has particle size finer than about mesh 325.
- 9. The process of claim 1 in which the Nb.sub.2 Se.sub.9 is made by reacting niobium with selenium in the temperature range from 450.degree. C. to 620.degree. C.
- 10. The process of claim 9 in which the Nb.sub.2 Se.sub.9 is made by reacting niobium with selenium at a temperature of approximately 580.degree. C.
- 11. The process of claim 1, in which the period of time ranges from 10 minutes to 4 hours.
- 12. The process of claim 1, in which the slurry comprises 30 to 70 weight percent Nb.sub.2 Se.sub.9.
- 13. The process of claim 1, in which said temperature ranges from 680.degree. to 720.degree. C. and said period of time ranges from 6 to 15 hours.
- 14. A nonaqueous cell comprising a lithium negative electrode, a separator, a positive electrode comprising niobium triselenide active material, an electrolyte, and means for making electrical contact with the negative and the positive electrode,
- CHARACTERIZED IN THAT
- the positive electrode is made by a procedure that comprises the steps of
- (a) at least once depositing a liquid slurry comprising Nb.sub.2 Se.sub.9 powder on the substrate and removing the liquid from the deposited slurry to form a dry coating of Nb.sub.2 Se.sub.9 powder thereon, said slurry comprising from 10 to 90 weight percent of Nb.sub.2 Se.sub.9, (b) heating the substrate with the said coating at a temperature within a range of from 625.degree. and 780.degree. C. and for a period of time ranging from one minute to 25 hours, said temperature and period of time being sufficient to form a layer of fibrous material comprising NbSe.sub.3, and (c) using the so-formed fibrous material with or without a metal support therefor as the positive electrode.
- 15. The cell of claim 14, in which the temperature range is from 630.degree. to 690.degree. C.
- 16. The cell of claim 14, in which the temperature range is from 650.degree. to 680.degree. C.
- 17. The cell of claim 14, in which the powder has particle size finer than about mesh 325.
- 18. The cell of claim 14, in which the period of time ranges from 10 minutes to 4 hours.
- 19. The cell of claim 14, in which said temperature range is from 680.degree. to 720.degree. C. and said period of time ranges from 6 to 15 hours.
- 20. The cell of claim 14, in which the slurry comprises 30 to 70 weight percent Nb.sub.2 Se.sub.9.
Parent Case Info
This application is a continuation of application Ser. No. 07/286,433, filed Dec. 19, 1988 now abandoned.
US Referenced Citations (5)
Non-Patent Literature Citations (2)
Entry |
High Energy Batteries, by Raymond Jasinski, Plenum Press, New York, 1967. |
Russian Inorganic Materials, 20, 935 (1985), "Interaction in the Nb-Se System" by V. E. Federov, A. V. Mishchenko, and Yu B. Ustimenko, pp. 935-939. |
Continuations (1)
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Number |
Date |
Country |
Parent |
286433 |
Dec 1988 |
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