NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE

• Main Authors: TOKUDA HIROYUKI, AOSHIMA NORIYUKI, KAGIMOTO JUNKO
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2017
• 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 improved in durability.SOLUTION: A nonaqueous electrolyte secondary battery comprises: a nonaqueous electrolyte containing an electrolyte and a nonaqueous solvent dissolving the electrolyte; a negative electrode and a positive electrode capable of absorbing and desorbing lithium ions; and a separator including polyolefin-based resin as a part of a constituent. The nonaqueous electrolyte contains a compound having a carbon-carbon triple bond, the separator contains calcium elements, and concentration of the calcium elements contained in the separator is 300 ppm or less.SELECTED DRAWING: None 【課題】耐久特性が改善された非水系電解液電池を提供すること。【解決手段】電解質とこれを溶解する非水系溶媒を含有してなる非水系電解液と、リチウムイオンを吸蔵放出可能な負極、並びに正極と、ポリオレフィン系樹脂を構成成分の一部としてなるセパレータを備えた非水系電解液二次電池であって、前記非水系電解液が炭素−炭素三重結合を有する化合物を含有し、前記セパレータがカルシウム元素を含有しており、かつ、前記セパレータ中に含まれるカルシウム元素の濃度が３００ｐｐｍ以下であることを特徴とする、非水系電解液二次電池。【選択図】なし