| 摘要 |
A process for preparing stoichiometric V6O13 usable as the cathode active material in high energy density primary and secondary batteries comprises the steps of: (a) raising the temperature of ammonium metavanadate up to a temperature of from about 350 DEG C. to about 400 DEG C. over an approximately 2 hour time period in a dynamic atmosphere of nitrogen gas to thermally decompose the ammonium metavanadate into a nonstoichiometric V6O13 product while evolving successively ammonia, water vapor and oxygen; (b) holding the nonstoichiometric V6O13 product at said temperature of from about 350 DEG C. to about 400 DEG C. for about 4 hours in said dynamic atmosphere of nitrogen gas; (c) heating the nonstoichiometric V6O13 product at a temperature of from about 400 DEG C. to about 500 DEG C. for from about 8 hours to about 12 hours in a dynamic atmosphere of a gaseous mixture having a composition giving an oxygen partial pressure equal to the oxygen partial pressure over stoichiometric V6O13 at said temperature to form stoichiometric V6O13; and (d) cooling the stoichiometric V6O13 to room temperature in said dynamic atmosphere of said gaseous mixture.
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