NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Author: FUJINO YUKIKO
• Format: Patent
• Language: English; Japanese
• Published: 04.02.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte battery arranged so that the worsening of a battery performance is suppressed even if it is left for a long time until it is charged first after filling of a nonaqueous electrolyte.SOLUTION: A nonaqueous electrolyte secondary battery comprises: a positive electrode; a negative electrode having a negative electrode current collector including copper; and a nonaqueous electrolyte. In the nonaqueous electrolyte secondary battery, the nonaqueous electrolyte contains a disulfide compound expressed by the following general formula: R-S-S-R, where Rand Rindependently represent an alkyl group of which the number of carbon atoms is 18 or less.SELECTED DRAWING: Figure 1 【課題】非水電解質を注液した後、最初の充電をするまで長時間放置した場合であっても、電池性能の低下が抑制された非水電解質電池を提供する。【解決手段】正極と、銅を含有する負極集電体を備える負極と、非水電解質と、を備える非水電解質二次電池であって、前記非水電解質は、一般式Ｒ１−Ｓ−Ｓ−Ｒ２で表され、前記Ｒ１及びＲ２はそれぞれ独立して、炭素数１８以下のアルキル基であるジスルフィド化合物を含有していることを特徴とする非水電解質二次電池。【選択図】図１