| abstract |
An object of the present invention is to provide a secondary battery using lithium utilizing a lithium ion insertion / desorption reaction, which has a large electric capacity, a high charge / discharge efficiency, a high energy density, and a long cycle life. SOLUTION: A nonionic surfactant is dissolved in an organic solvent that is hardly soluble or insoluble in water, a transition metal salt aqueous solution is mixed to prepare an emulsion, and then an Li salt or LiOH aqueous solution is reacted and dried and calcined. And a method for producing a positive electrode active material or a negative electrode active material, which has a step of obtaining a lithium-transition metal oxide having a porous hollow structure, and a method for producing a secondary battery using lithium. [Selection diagram] Fig. 1 |