POROUS CARBON

• Main Authors: TAKESHITA SOHEI, ITO YOSHIO, ABE NAOTO, ARAKI YUKA, DAN TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 26.07.2018
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte power storage device superior in cycle characteristics, which can keep a high energy density and suppress the expansion of a positive electrode.SOLUTION: A nonaqueous electrolyte power storage device comprises: a positive electrode including a positive electrode active material which allows an anion to go thereinto and out thereof; a negative electrode including a negative electrode active material which allows a cation to go thereinto and out thereof; and a nonaqueous electrolyte solution. In the nonaqueous electrolyte power storage device, a porous carbon having pores of a three-dimensional cancellous structure is used as the positive electrode active material; and the sectional thickness change rate of a positive electrode film including the positive electrode active material, which is defined by the formula (1) below, is less than 45%.SELECTED DRAWING: None 【課題】高いエネルギー密度を維持し、かつ正極の膨張を抑制でき、サイクル特性に優れた非水電解液蓄電素子の提供。【解決手段】アニオンを挿入及び脱離可能な正極活物質を含む正極と、カチオンを挿入及び脱離可能な負極活物質を含む負極と、非水電解液とを備えた非水電解液蓄電素子であって、前記正極活物質として、三次元網目構造の細孔を有する多孔質炭素を用い、前記正極活物質を含む正極膜の下記式（１）で定義される断面厚み変化率が４５％未満である非水電解液蓄電素子である。【選択図】なし