NONAQUEOUS ELECTROLYTE, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND ENERGY DEVICE

摘要

Provided is a nonaqueous electrolyte secondary battery including: a positive electrode; a negative electrode; and a nonaqueous electrolyte solution, wherein the positive electrode includes a metal oxide represented by the following composition formula (14): Li_a101Ni_b101Co_c101M_d101O₂ (14), where a101, b101, c101 and d101 represent numerical values of 0.90≤a101≤1.10, 0.50≤b101≤0.98, 0.01≤c1010.50 and 0.01≤d1010.50, satisfying b101+c101+d101=1; and M represents at least one element selected from the group consisting of Mn, Al, Mg, Zr, Fe, Ti, and Er, and the nonaqueous electrolyte solution includes a compound represented by the following Formula (C):; ;where R¹⁰¹ to R¹⁰³ each independently represent a C_1-10 alkyl group optionally having a substituent, or a C_6-18 aryl group optionally having a substituent; and X represents hydrogen, a C_2-10 alkenyl group, or a C_2-10 alkynyl group.