LITHIUM ION SECONDARY BATTERY AND METHOD OF MANUFACTURING SAME

• Main Authors: SEKIYA Masaaki, HAMA Yoshiki
• Format: Patent
• Language: English; French; German
• Published: 26.09.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

There is provided a lithium-ion secondary battery that includes a positive electrode including a sulfur-based positive active material containing at least sulfur and a negative electrode including a silicon-based negative active material containing at least silicon or a tin-based negative active material containing tin, in which lithium ions are easily implanted and moved. There is also provided a method of manufacturing the lithium-ion secondary battery. A positive electrode 3 includes a positive current collector 4 and a sulfur-based positive active material 5 containing at least sulfur (S). A negative electrode 7 includes a negative current collector 8 and a silicon-based negative active material 9 containing at least silicon (Si) or a tin-based negative active material 9 containing tin (Sn). The positive current collector 4 is made of an aluminum foil having a plurality of through holes. The negative current collector 8 is made of a copper foil having a plurality of through holes. The positive electrode 3 and the negative electrode 7 are stacked via a separator 11 to form an electrode group 13.