| 摘要 |
A compound comprising a composition Ax(M'1-aM''a)y(XD4)z, Ax(M'1-aM''a)y(DXD4)z, or Ax(M'1-aM''a)y(X2D7)z, and have values such that x, plus y(1-a) times a formal valence or valences of M', plus ya times a formal valence or valence of M'', is equal to z times a formal valence of the XD4, X2D7, or DXD4 group; or a compound comprising a composition (A1-aM''a)xM'y(XD4)z, (A1-aM''a)xM'y(DXD4)z (A1-aM''a)xM'y(X2D7)z and have values such that (1-a)x plus the quantity ax times the formal valence or valences of M'' plus y times the formal valence or valences of M' is equal to z times the formal valence of the XD4, X2D7 or DXD4 group. In the compound, A is at least one of an alkali metal and hydrogen, M' is a first-row transition metal, X is at least one of phosphorus, sulfur, arsenic, molybdenum, and tungsten, M'' any of a Group IIA, IIIA, IVA, VA, VIA, VIIA, VIIIA, IB, IIB, IIIB, IVB, VB, and VIB metal, D is at least one of oxygen, nitrogen, carbon, or a halogen, 0.0001<a<=0.1, and x, y, and z are greater than zero. The compound can have a conductivity at 27° C. of at least about 10<-8 >S/cm. The compound can be a doped lithium phosphate that can intercalate lithium or hydrogen. The compound can be used in an electrochemical device including electrodes and storage batteries and can have a gravimetric capacity of at least about 80 mAh/g while being charged/discharged at greater than about C rate of the compound.
|
