LITHIUM ION CAPACITOR

• Main Authors: HATTORI MAKI, MASHIMA MASATOSHI, NUMATA KOMA, TAKAHASHI KENJI, OKUNO KAZUKI, OGAWA MITSUYASU
• Format: Patent
• Language: English; Japanese
• Published: 13.10.2016
• 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 lithium ion capacitor which is high in output, and in which the delamination of a negative electrode mixture accompanying gas generation is suppressed.SOLUTION: A lithium ion capacitor comprises: a positive electrode; a negative electrode; a separator interposed between the positive and negative electrodes; and a lithium ion-conducting electrolyte. The positive electrode includes: a positive electrode current collector; and a positive electrode active material supported by the positive electrode current collector. The negative electrode includes: a negative electrode current collector; and a negative electrode mixture supported by the negative electrode current collector. The negative electrode current collector is composed of a metal porous body having a 3D mesh-like skeleton. The negative electrode mixture includes a negative electrode active material capable of occluding and releasing lithium ions, and carbon black; the content of the carbon black is 20 pts.mass or more to 100 pts.mass of the negative electrode active material.SELECTED DRAWING: Figure 1 【課題】出力が高く、ガス発生に伴う負極合剤の剥離が抑制されたリチウムイオンキャパシタを提供する。【解決手段】リチウムイオンキャパシタは、正極、負極、前記正極と前記負極との間に介在するセパレータ、およびリチウムイオン伝導性の電解質を含み、前記正極は、正極集電体と、前記正極集電体に担持された正極活物質とを含み、前記負極は、負極集電体と、前記負極集電体に担持された負極合剤とを含み、前記負極集電体は、三次元網目状の骨格を有する金属多孔体であり、前記負極合剤は、リチウムイオンを吸蔵および放出する負極活物質と、カーボンブラックとを含み、前記カーボンブラックの量は、前記負極活物質１００質量部に対して２０質量部以上である。【選択図】図１