Nonaqueous electrolyte battery

摘要

There is provided a nonaqueous electrolyte battery (1). The nonaqueous electrolyte battery (1) includes an electrode group (2) containing a positive electrode (3) comprising 12-34 wt% nickel, and a negative electrode (4) comprising 39-51 wt% titanium, and a nonaqueous electrolyte held in the electrode group (2). The nonaqueous electrolyte battery (1) satisfies the following relation (1): -0.07 ‰¤ (D A -D C ) × S/B ‰¤ 0.05. The nonaqueous electrolyte battery shows an improved capacity retention ratio after a warming step after initial charging. Also the use of boron-salt in the electrolyte is beneficial for the capacity retention ratio.