SECONDARY BATTERY

摘要

To provide a lithium-ion secondary battery including a first electrode including a first electrode active substance and a second electrode including a second electrode active substance and a third electrode active substance. The second electrode active substance has higher charge and discharge efficiency than the first electrode active substance. The third electrode active substance has lower charge and discharge efficiency than the second electrode active substance. The product of the capacity of the second electrode active substance and the difference between the charge and discharge efficiency of the second electrode active substance and charge and discharge efficiency of the first electrode active substance is greater than the product of the capacity of the third electrode active substance and the difference between the charge and discharge efficiency of the first electrode active substance and the charge and discharge efficiency of the third electrode active substance. The compounding proportion of the second electrode active substance in the total of the second electrode active substance and the third electrode active substance is less than the compounding proportion of the third electrode active substance in the total of the second electrode active substance and the third electrode active substance.

主权项

1. A secondary battery comprising:
a first electrode comprising a first electrode active substance; and a second electrode comprising a second electrode active substance and a third electrode active substance, wherein charge and discharge efficiency of the second electrode active substance is different from charge and discharge efficiency of the third electrode active substance.