Production method for non-aqueous electrolyte secondary battery active material providing lithium insertion and solution contact
摘要
說明書
A concentration of the polycyclic aromatic compound or the straight chain polyphenylene compound in the solution A1 is preferably between 10?2 mol/L to 5 mol/L, and more preferably between 10?1 mol/L to 3 mol/L. When the concentration of the polycyclic aromatic compound or the straight chain polyphenylene compound is not smaller than 10?2 mol/L, a reaction between the lithium metal and the polycyclic aromatic compound or the straight chain polyphenylene compound tends to proceed, and a reaction time may be shortened. When the concentration of the polycyclic aromatic compound or the straight chain polyphenylene compound is not larger than 5 mol/L, a reaction product between the polycyclic aromatic compound or the straight chain polyphenylene compound and the lithium metal is difficult to attach to the silicon compound, and the silicon compound powder may be readily separated. Further, when the negative electrode active material is formed into the non-aqueous electrolyte secondary battery, a reaction residue is not eluted into the electrolytic solution, and the battery characteristics may be suppressed from deteriorating due to a side reaction. Further, the lithium metal is preferably contained in an amount of not smaller than 0.5 equivalent to the polycyclic aromatic compound or the straight chain polyphenylene compound and a part thereof may not be dissolved.
Further, as the amine contained in the solution A2, dimethyl amine, ethyl amine, diethyl amine, ethylene diamine, and triethylene triamine may be used.
