abstract |
The present invention provides a positive electrode active material for a lithium ion secondary battery or a positive electrode active material for a sodium ion secondary battery which can effectively exhibit more excellent charge-discharge characteristics, and a method for producing the same. That is, the present invention is a cellulose nanofiber-derived carbon supported by formula (A): LiFe a Mn b Mc PO 4 , formula (B): LiFe a Mn b Mc SiO 4 , or formula (C ): a positive electrode active material for a secondary battery made of an oxide represented by NaFe g Mn h Q i PO 4 . |