Sodium ion batteries

Details Sodium ion batteries Sodium ion batteries

H - Electricity

01

M

H01M 4/24 (2006.01) H01M 4/13 (2010.01) H01M 10/24 (2006.01)

Patent

CA 2750707

A battery comprising a positive electrode, a negative electrode, and an electrolyte, wherein the positive electrode comprises an electrochemically active material that can reversibly cycle sodium ions; and wherein the negative electrode comprises a material capable of accepting and releasing sodium ions; wherein the electrochemically active material comprises at least one compound of the formula: A a M b(XY4)c Z d, wherein (a) A is selected from the group consisting of Li, Na, K, and mixtures thereof, and 0 < a <= 9; (b) M comprises one or more metals, comprising at least one metal which is capable of undergoing oxidation to a higher valence state, and 1 <= b <= 3; (c) XY4 is selected from the group consisting of X'O4- x Y'x, X'O4-y Y'2y, X"S4, and mixtures thereof, where X' is selected from the group consisting of P, As, Sb, Si, V, Ge, S, and mixtures thereof; X" is selected from the group consisting of P, As, Sb, Si, V, Ge and mixtures thereof, Y' is selected from the group consisting of halogen, S, N, and mixtures thereof; 0 <= x < 3; and 0 < y <= 2; and 0 < c <= 3; (d) Z is OH, halogen, or mixtures thereof, and 0 <= d <= 6; and wherein M, XY4, Z, a, b, c, d, x and y are selected so as to maintain electroneutrality of the compound.

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