Lithium secondary battery

A lithium secondary battery comprising:

• a positive electrode;
• a negative electrode;
• a separator disposed between the positive electrode and the negative electrode;
• and
• a non-aqueous electrolyte having lithium ion conductivity, wherein
• lithium metal is deposited on the negative electrode during charging, and dissolves from the negative electrode during discharging,
• a spacer is provided between the separator and at least one of the positive electrode and the negative electrode, the spacer including a plurality of protrusions formed on a surface of the separator,
• a first length of the separator in a first direction D1 is shorter than a second length of the separator in a second direction D2 intersecting the first direction D1,
• in a cross section of the spacer taken along a thickness direction of the separator and the first direction D1, a spacer-side angle between the protrusion spacer and the electrode in contact with the protrusion spacer is greater than 90°, and
• configured such that a straight line SL extending along the first direction D1 and crossing the spacer three or more times can be drawn when viewed in a normal direction of a main surface of the separator.