LITHIUM POTASSIUM TANTALATE COMPOUNDS AS Li SUPER-IONIC CONDUCTOR, SOLID ELECTROLYTE AND COATING LAYER FOR LITHIUM METAL BATTERY AND LITHIUM-ION BATTERY

A solid state lithium battery, comprising:

• an anode;
• a cathode;
• and
• a solid state lithium ion electrolyte located between the anode and the cathode;
• wherein
• the solid state lithium ion electrolyte comprises at least one material selected from the group of materials consisting compounds of formulae (I), (II), (III) and (IV):
• Liy(M1)x1KTaO6 (I)
• wherein x1 is a number from greater than 0 to less than 6, y is a value such that charge neutrality of the formula is obtained, and M1 is at least one element different from Li selected from elements of groups 1, 2, 13 and transition metals;
• LiyK1-x2(M2)x2 TaO6 (II)
• wherein x2 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the composite formula is obtained, and M2 is at least one element different from K selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 and 13;
• LiyKTa1-x3(M3)x3O6 (III)
• wherein x3 is a number from greater than 0 to less than 1. y is a value such that charge neutrality of the formula is obtained, and M3 is at least one element different from Ta selected from elements of groups 1-13;
• and
• Li6KTaO6 (IV)

An electrode for a solid state lithium battery, comprising:

• a current collector;
• and
• an electrode active layer on the current collector;
• wherein the electrode active layer comprises at least one compound selected from the group consisting of compounds of formulae (I), (II), (III) and (IV):
• Liy(M1)x1KTaO6 (I)
• wherein x1 is a number from greater than 0 to less than 6, y is a value such that charge neutrality of the formula is obtained, and M1 is at least one element different from Li selected from elements of groups 1, 2, 13 and transition metals;
• LiyK1-x2(M2)x2TaO6 (II)
• wherein x2 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the composite formula is obtained, and M2 is at least one element different from K selected from elements of groups I, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 and 13;
• LiyKTa1-x3(M3)x3O6 (III)
• wherein x3 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the formula is obtained, and M3 is at least one element different from Ta selected from elements of groups 1-13;
• and
• Li6KTaO6 (IV)

An electrode for a solid state lithium battery, comprising:

• a current collector;
• an electrode active layer on the current collector;
• and a coating layer on the electrode active layer;
• wherein the coating layer on the electrode active layer comprises at least one compound selected from the group consisting of compounds of formulae (I), (II), (III) and (IV):
• Liy(M1)x1KTaO6 (I)
• wherein x1 is a number from greater than 0 to less than 6, y is a value such that charge neutrality of the formula is obtained, and M1 is at least one element different from Li selected from elements of groups 1, 2, 13 and transition metals;
• LiyK1-x2(M2)x2TaO6 (II)
• wherein x2 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the composite formula is obtained, and M2 is at least one element different from K selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 and 13;
• LiyKTa1-x3(M3)x3O6 (III)
• wherein x3 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the formula is obtained, and M3 is at least one element different from Ta selected from elements of groups 1-13;
• and
• Li6KTaO6 (IV)