NONAQUEOUS LITHIUM POWER STORAGE ELEMENT

PROBLEM TO BE SOLVED: To provide a nonaqueous lithium power storage element having a high positive electrode peel strength, a high energy density, high input/output characteristics, and superior durability against high-load charge and discharge cycles.SOLUTION: A nonaqueous lithium power storage element comprises: a positive electrode; a negative electrode; a separator; and a nonaqueous electrolyte including lithium ions. The positive electrode has: a positive electrode current collector; and a positive electrode active material layer on one or each of opposing faces of the positive electrode current collector. The positive electrode active material layer includes: a positive electrode active material including carbon material; and a binding agent. The negative electrode has: a negative electrode current collector; and a negative electrode active material layer on one or each of opposing faces of the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material capable of occluding and releasing a lithium ion. The positive electrode includes a lithium compound other than the positive electrode active material, which is 1-50 mass% to a total mass of the positive electrode active material layer. In differential scanning calorimetry about the positive electrode active material layer, a fusion start temperature of the binding agent is not detected in a range of 25-250°C.SELECTED DRAWING: None 【課題】正極の剥離強度が高く、高エネルギー密度、高入出力特性、及び高負荷充放電サイクル耐久性に優れた非水系リチウム型蓄電素子を提供すること。【解決手段】正極と、負極と、セパレータと、リチウムイオンを含む非水系電解液とを含む、非水系リチウム型蓄電素子であって、上記正極は、正極集電体と、上記正極集電体の片面又は両面に正極活物質層とを有し、上記正極活物質層は、炭素材料を含む正極活物質と、結着剤とを含有し、上記負極は、負極集電体と、上記負極集電体の片面又は両面に負極活物質層とを有し、上記負極活物質層は、リチウムイオンを吸蔵及び放出できる負極活物質を含有し、上記正極は、上記正極活物質層の全質量を基準として、正極活物質以外のリチウム化合物を１質量％以上５０質量％以下含有し、かつ、上記正極活物質層の示差走査熱量測定において、上記結着剤の融解開始温度が２５℃以上２５０℃以下の範囲で検出されない、非水系リチウム型蓄電素子。【選択図】なし