NEGATIVE ELECTRODE, HALF SECONDARY BATTERY AND SECONDARY BATTERY

• Main Authors: UNEMOTO ATSUSHI, TANAKA AKIHIDE, UEDA SUGURU, IIJIMA ATSUSHI, KAWAJI JUN
• Format: Patent
• Language: Chinese; English
• Published: 03.07.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention aims to enlarge the capacity of the negative electrode of a secondary battery. A negative electrode which comprises a non-aqueous electrolyte solution and a negative electrode active substance, wherein the reductive decomposition potential of the non-aqueous electrolyte solution is not higher than the battery reaction potential of the negative electrode active substance, and the content of the negative electrode active substance in the negative electrode is 76 wt% or greater. The negative electrode may be a negative electrode wherein the non-aqueous electrolyte solution comprisesa mixture of an ether-type solvent with a solvated electrolyte salt and a low-viscosity organic solvent and the mixing ratio of the low-viscosity organic solvent to the sum of the mixture and the low-viscosity organic solvent is smaller than 80 wt%, and/or a negative electrode wherein the ether-type solvent contains Tetraglyme. 本发明提高二次电池中的负极的容量。一种负极，其包含非水电解液和负极活性物质，非水电解液的还原分解电位为上述负极活性物质的电池反应电位以下，负极中的上述负极活性物质的含量为76wt％以上。可