Lithium-ion cell

• Main Authors: ITOH YOUHEI, OCHIDA MANABU, ITOH SHINGO, YOSHIURA TADASHI, KAJIMOTO TAKANORI
• Format: Patent
• Language: Chinese; English
• Published: 29.08.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided is an exceptionally safe lithium-ion cell. A lithium-ion cell 20 having a discharge capacity of 20 Ah or more, the cell being provided with, inside a cell vessel 5: an electrode group 6 in which a positive electrode having as a principal positive-electrode active material a lithium-nickel-manganese-cobalt composite oxide, and a negative electrode having as a principal negative-electrode active material an amorphous carbon, are layered with a separator interposed therebetween; and an electrolyte, wherein the ratio (value of Y/X) of the volume Y of the electrolyte in relation to the total pore volume X within the cell container 5 is 0.65 or more. 本发明提供安全性优异的锂离子电池。锂离子电池(20)在电池容器(5)内具备电极组(6)以及电解液，所述电极组(6)是将以锂-镍-锰-钴复合氧化物为主要正极活性物质的正极、以非晶质碳为主要负极活性物质的负极隔着隔膜层叠而成的，所述锂离子电池(20)的放电容量大于或等于20Ah，其中，使电解液的体积Y相对于电池容器(5)内的总空隙体积X之比(Y/X的值)大于或等于0.65。