| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery capable of preventing thermal runaway of the battery and having high safety. SOLUTION: This nonaqueous electrolyte secondary battery is provided with a positive electrode, and a negative electrode using a carbon material as an active material. In the nonaqueous electrolyte secondary battery, a layer containing magnesium oxide for preventing a short circuit is formed on a surface of the negative electrode. In the nonaqueous electrolyte secondary battery, the layer containing the magnesium oxide preferably contains polyolefin having a shutdown function, that is, a function for restraining heat generation by closing the passage of ions by thermal constriction of a separator when the battery temperature abnormally rises. |
