Metal lithium chloride derivatives in the space group of P21/c as Li super-ionic conductor, solid electrolyte, and coating layer for Li metal battery and Li-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):
• Lix-y(M1)yMCl4 (I)
• wherein
• M is Al, Zn or a combination of Al and Zn
• y is a number from greater than 0 to less than 2, x 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 and 13;
• LixM1-z(M2)zCl4 (II)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• z is a number from greater than 0 to less than 1, x is a value such that the formula (II) is charge neutral, and M2 is at least one element different from M selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16 and 17;
• and
• LixMCl4-h(X)h (III)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• h is from greater than 0 to less than 4, x is a value such that the formula (III) is charge neutral, and X is at least one element different from Cl selected from elements of groups 16 and 17;
• and
• Lix-m(M1)mM1-n(M2)nCl4-o(X)o (IV)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• m is a number from 0 to less than 2, n is a number from 0 to less than 1, o is a number from 0 to less than 4 and x is a value such that formula (IV) is charge neutral, with the proviso that at least two of m, n and o cannot be 0,
• wherein the compounds of formulae (I), (II), (III) and (IV) have a crystal lattice structure having a monoclinic phase of the space group P21/c, and
• with the proviso that the content of M1, M2 and/or X is a value such that the P21/c structure of the compound is maintained.

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):
• Lix-y(M1)yMCl4 (I)
• wherein
• M is Al, Zn or a combination of Al and Zn
• y is a number from greater than 0 to less than 2, x 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 and 13;
• LixM1-z(M2)zCl4 (II)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• z is a number from greater than 0 to less than 1, x is a value such that the formula (II) is charge neutral, and M2 is at least one element different from M selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16 and 17;
• and
• LixMCl4-h(X)h (III)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• h is from greater than 0 to less than 4, x is a value such that the formula (III) is charge neutral, and X is at least one element different from Cl selected from elements of groups 16 and 17;
• and
• Lix-m(M1)mM1-n(M2)nCl4-o(X)o (IV)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• m is a number from 0 to less than 2, n is a number from 0 to less than 1, o is a number from 0 to less than 4 and x is a value such that formula (IV) is charge neutral, with the proviso that at least two of m, n and o cannot be 0,
• wherein the compounds of formulae (I), (II), (III) and (IV) have a crystal lattice structure having a monoclinic phase of the space group P21/c, and
• with the proviso that the content of M1, M2 and/or X is a value such that the P21/c structure of the compound is maintained.

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 laver;
• 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):
• Lix-y(M1)yMCl4 (I)
• wherein
• M is Al, Zn or a combination of Al and Zn
• y is a number from greater than 0 to less than 2, x 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 and 13;
• LixM1-z(M2)zCl4 (II)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• z is a number from greater than 0 to less than 1, x is a value such that the formula (II) is charge neutral, and M2 is at least one element different from M selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16 and 17;
• and
• LixMCl4-h(X)h (III)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• h is from greater than 0 to less than 4, x is a value such that the formula (III) is charge neutral, and X is at least one element different from Cl selected from elements of groups 16 and 17;
• and
• Lix-m(M1)mM1-n(M2)nCl4-o(X)o (IV)
• wherein
• M is Al, Zn or a combination of Al and Zn,
• m is a number from 0 to less than 2, n is a number from 0 to less than 1, o is a number from 0 to less than 4 and x is a value such that formula (IV) is charge neutral, with the proviso that at least two of m, n and o cannot be 0,
• wherein the compounds of formulae (I), (II), (III) and (IV) have a crystal lattice structure having a monoclinic phase of the space group P21/c, and
• with the proviso that the content of M1, M2 and/or X is a value such that the P21/c structure of the compound is maintained.