US2007190425A1PendingUtilityA1

Alkali/Transition Metal Halo-And Hydroxy-Phosphates And Related Electrode Active Materials

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Assignee: BARKER JEREMYPriority: Apr 27, 2000Filed: Apr 12, 2007Published: Aug 16, 2007
Est. expiryApr 27, 2020(expired)· nominal 20-yr term from priority
Inventors:Jeremy BarkerM. Yazid SaidiJeffrey Swoyer
H01M 4/58H01M 10/0525C01B 25/455H01M 2004/028H01M 4/587H01M 4/623H01M 4/136H01M 4/5825Y02E60/10
59
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Claims

Abstract

The invention provides a novel polyanion-based electrode active material for use in a secondary or rechargeable electrochemical cell, wherein the electrode active material is represented by the general formula A a M b (XY 4 ) 2 Z d .

Claims

exact text as granted — not AI-modified
1 . An electrode active material represented by the general formula:  
       A a M b (XY 4 ) 2 Z d ,  
     wherein 
 (a) A is selected from the group consisting of Li, Na, K, and mixtures thereof, and 0.1<a≦6;  
 (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) XY 4  is selected from the group consisting of X′O 4-x Y′ x , X′O 4-y  Y′ 2y , X″S 4 , and mixtures thereof, where X′ is P, As, Sb, Si, Ge, S, and mixtures thereof, X″ is P, As, Sb, Si, Ge and mixtures thereof, Y′ is a halogen, 0≦x<3, and 0<y<4; and  
 (d) Z is selected from the group consisting of a hydroxyl, a halogen, and mixtures thereof and 0<d≦6; and  
 wherein A, M, X, Y, Z, a, b, d, x and y are selected so as to maintain electroneutrality of the electrode active material.  
 
   
   
       2 . The electrode active material according to  claim 1 , wherein A comprises Li.  
   
   
       3 . The electrode active material according to  claim 1 , wherein A is Na.  
   
   
       4 . The electrode active material according to  claim 3 , wherein XY 4  is PO 4  or SiO 4 .  
   
   
       5 . The electrode active material according to  claim 3 , wherein XY 4  is PO 4 .  
   
   
       6 . The electrode active material according to  claim 1 , wherein A is Li.  
   
   
       7 . The electrode active material according to  claim 6 , wherein XY 4  is PO 4  or SiO 4 .  
   
   
       8 . The electrode active material according to  claim 6 , wherein XY 4  is PO 4 .  
   
   
       9 . The electrode active material according to  claim 1 , wherein a is from about 1 to about 6.  
   
   
       10 . The electrode active material according to  claim 1 , wherein M comprises a transition metal selected from Groups 4 to 11 of the Periodic Table.  
   
   
       11 . The electrode active material according to  claim 10 , wherein M is a +3 oxidation state transition metal selected from Groups 4 to 11 of the Periodic Table.  
   
   
       12 . The electrode active material according to  claim 10 , wherein M is selected from the group consisting of Fe, Co, Ni, Mn, Cu, V, Ti, Cr, and mixtures thereof.  
   
   
       13 . The electrode active material according to  claim 10 , wherein XY 4  is PO 4  or SiO 4 .  
   
   
       14 . The electrode active material according to  claim 10 , wherein XY 4  is PO 4 .  
   
   
       15 . The electrode active material according to  claim 1 , wherein M is M′ 0 M″, wherein M′ is at least one transition metal selected from Groups 4 to 11 of the Periodic Table; and M″ is at least one element selected from Groups 2, 3, 12, 13, and 14 of the Periodic Table.  
   
   
       16 . The electrode active material according to  claim 15 , wherein M′ is selected from the group consisting of Fe, Co, Ni, Mn, Cu, V, Ti, Cr, and mixtures thereof.  
   
   
       17 . The electrode active material according to  claim 16 , wherein M′ is selected from the group consisting of Fe, Co, Mn, Cu, V, Cr, and mixtures thereof.  
   
   
       18 . The electrode active material according to  claim 16 , wherein M″ is selected from the group consisting of Mg, Ca, Zn, Sr, Pb, Cd, Sn, Ba, Be, Al, and mixtures thereof.  
   
   
       19 . The electrode active material according to  claim 18 , wherein M″ is selected from the group consisting of Mg, Ca, Zn, Ba, Al, and mixtures thereof.  
   
   
       20 . The electrode active material according to  claim 18 , wherein XY 4  is PO 4  or SiO 4 .  
   
   
       21 . The electrode active material according to  claim 18 , wherein XY 4  is PO 4 .  
   
   
       22 . The electrode active material according to  claim 15 , wherein M″ is selected from the group consisting of Mg, Ca, Zn, Sr, Pb, Cd, Sn, Ba, Be, Al, and mixtures thereof.  
   
   
       23 . The electrode active material according to  claim 22 , wherein XY 4  is PO 4  or SiO 4 .  
   
   
       24 . The electrode active material according to  claim 22 , wherein XY 4  is PO 4 .  
   
   
       25 . The electrode active material according to  claim 1 , wherein XY 4  is PO 4  or SiO 4 .  
   
   
       26 . The electrode active material according to  claim 1 , wherein XY 4  is PO 4 .  
   
   
       27 . The electrode active material according to  claim 1 , wherein Z comprises F.  
   
   
       28 . The electrode active material according to  claim 1 , wherein Z is selected from the group consisting of OH, F, Cl, Br, and mixtures thereof.  
   
   
       29 . The electrode active material according to  claim 28 , wherein Z is F.  
   
   
       30 . The electrode active material according to  claim 28 , wherein XY 4  is PO 4  or SiO 4 .  
   
   
       31 . The electrode active material according to  claim 28 , wherein XY 4  is PO 4 .  
   
   
       32 . The electrode active material according to  claim 28 , wherein d is from 0.1 to about 6.  
   
   
       33 . The electrode active material according to  claim 1 , wherein d is from about 1 to about 6.  
   
   
       34 . The electrode active material according to  claim 1 , wherein d is from about 1 to about 6.

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