Active material, nonaqueous electrolyte battery, battery pack and battery module
摘要
說(shuō)明書(shū)
In order to measure the composition of the active material for a battery included in the battery according to ICP emission spectrography, the following procedure is specifically performed. First, according to the previously described procedure, an electrode containing an active material to be measured is taken out from a nonaqueous electrolyte battery, and washed. The washed electrode is put in a suitable solvent, and irradiated with an ultrasonic wave. For example, an electrode is put into ethyl methyl carbonate in a glass beaker and the glass beaker is vibrated in an ultrasonic washing machine, and thereby an electrode layer containing an electrode active material can be separated from a current collector. Next, the separated electrode layer is dried under reduced pressure. The obtained electrode layer is ground in a mortar or the like to provide a powder containing the target active material for a battery, conductive auxiliary agent, and binder or the like. By dissolving the powder in an acid, a liquid sample containing the active material for a battery can be prepared. At this time, hydrochloric acid, nitric acid, sulfuric acid, and hydrogen fluoride or the like can be used as the acid. The composition of the active material for a battery can be found by subjecting the liquid sample to ICP emission spectrochemical analysis.
