| 摘要 |
A secondary battery comprising a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte is provided. The electrode material of which the positive and/or negative electrode is made contains hydrophobic spherical silica particles, which are obtained by introducing R1SiO3/2 units on surfaces of hydrophilic spherical silica particles of SiO2 units, and further introducing R23SiO1/2 units on the surfaces, and have an average particle size of 5-1,000 nm, a particle size distribution D90/D10 of 2-3, and an average circularity of 0.8-1. All components of the battery are made hydrophobic for suppressing absorption of water within the battery and entry of water into the battery. |
