Inventors:
Teruo Umemoto - Westminster CO
Assignee:
IMT Research, Inc. - Denver CO
International Classification:
H01M 460
US Classification:
429212, 429209, 429247, 429232, 429233, 429217
Abstract:
Compounds containing at least one tetraketopiperazine-1,4-diyl unit are disclosed as active materials in the positive electrodes of batteries. Novel methods for preparing the tetraketopiperazine unit-containing compounds include: (i) reacting an oxalyl halide and an oxamide, and adding water or an aqueous alkali solution to the reaction mixture, (ii) reacting an oxalyl halide and a silylamine, (iii) reacting an oximidyl halide and an amine, (iv) reacting an oxalyl halide and a silylamine, and reacting with an amine, (v) reacting an oxalyl halide and a dioxamide, (vi) reacting an oximidyl halide and a diamine, and (vii) reacting an oxalyl halide and a silylamine, and reacting with a diamine. A novel method for preparing an oximidyl halide is also disclosed.