| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte secondary battery having a large capacity and excellent in charge/discharge cyclic characteristics. SOLUTION: A non-aqueous electrolyte secondary battery includes a negative electrode consisting of composite particles structured so that part or the whole of the peripheral surface of each nuclear particle consisting of solid phase A is covered with another solid phase B, wherein the solid phase A contains tin as the constituent element while the phase B is a solid solution or intermetallic compound of tin as the phase A constituent element and at least one element selected among the group II elements, transition elements, group XII and XIII elements, and group XIV elements except carbon in the periodic table excluding the above-mentioned constituent element, and it is arranged so that the porosity of the mix layer of negative electrode ranges between 10 and 50%. |
