Solid state lithium-ion conductor

A component of a lithium secondary electrochemical cell comprising the compound of Formula 1

• Li(6+(4−a)x+c)M4+(2−x)Aa+xO(7−c)N′c (1)
• wherein
• M is a tetravalent cationic element,
• A is a divalent or trivalent cationic element,
• N′ is an anion of a Group 15 element,
• wherein when A is Y3+, In3+, Zn2+, or a combination thereof, 0.15<x≤0.5, otherwise 0≤x≤0.5, 0≤c≤2, and ((4−a)x+c)>0.

An electrochemical cell comprising:

• a positive electrode;
• a negative electrode;
• and
• an electrolyte between the positive electrode and the negative electrode,
• wherein at least one of the positive electrode, the negative electrode and the electrolyte comprise the compound of Formula 1
• Li(6+(4−a)x+c)M4+(2−x)Aa+xO(7−c)N′c (1)
• wherein
• M is a tetravalent cationic element,
• A is a divalent or trivalent cationic element,
• N′ is an anion of a Group 15 element, wherein when A is Y3+, In3+, Zn2+, or a combination thereof, 0.15<x≤0.5, otherwise 0≤x≤0.5, 0≤c≤2, and ((4−a)x+c)>0.

A method of manufacturing an electrochemical cell, the method comprising:

• providing a negative electrode comprising lithium, a lithium alloy, or combination thereof;
• disposing the compound of Formula 1 on the negative electrode;
• disposing an electrolyte on the negative electrode;
• and
• disposing a positive electrode on the separator to manufacture the electrochemical cell.