NONAQUEOUS ELECTROLYTE POWER STORAGE DEVICE

• Main Authors: TAKESHITA SOHEI, ITO YOSHIO, ABE NAOTO, ARAKI YUKA, DAN TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 16.04.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a nonaqueous electrolyte power storage device which is high in energy density and superior in cycle characteristic over a long term, and which is small in the reduction rate of its discharge capacity even in the case of repeating the charge and discharge thereof.SOLUTION: A nonaqueous electrolyte power storage device comprises: a positive electrode including a positive electrode active material capable of occluding and releasing an anion; a negative electrode including a negative electrode active material; and a nonaqueous electrolyte solution. The positive electrode active material includes carbon particles and lithium metal oxide particles. The carbon particles have micropores forming a three-dimensional cancellous structure.SELECTED DRAWING: Figure 1 【課題】高いエネルギー密度を有し、充放電を繰り返した場合でも、放電容量の低下率が小さく、長期サイクル性に優れた非水電解液蓄電素子の提供。【解決手段】アニオンを吸蔵及び放出可能な正極活物質を含む正極と、負極活物質を含む負極と、非水電解液と、を有する非水電解液蓄電素子であって、前記正極活物質が、炭素粒子と、リチウム金属酸化物粒子とを含有し、前記炭素粒子が、三次元網目構造を形成する複数の細孔を有する非水電解液蓄電素子である。【選択図】図１