Rechargeable electrochemical battery cell

摘要

Rechargeable lithium battery cell having a housing, a positive electrode, a negative electrode and an electrolyte containing a conductive salt, wherein the electrolyte comprises SO2 and the positive electrode contains an active material in the composition LixM′yM″z(XO4)aFb, wherein
M′ is at least one metal selected from the group consisting of the elements Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn,M″ is at least one metal selected from the group consisting of the metals of the groups II A, III A, IV A, V A, VI A, IB, IIB, IIIB, IVB, VB, VIB and VIIIB,X is selected from the group consisting of the elements P, Si and S,x is greater than 0,y is greater than 0,z is greater than or equal to 0,a is greater than 0 andb is greater than or equal to 0.

主权项

1. A battery cell, comprising:
a housing, a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises SO2 and a conductive salt, and wherein the electrolyte contains less than 30% by weight of organic material, wherein the positive electrode comprises a compound of the formula LixM′y(XO4)aFb(I), which compound is optionally doped, wherein M′ is at least one metal selected from the group consisting of the elements Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn, X is selected from the group consisting of the elements P, Si and S, x is greater than 0, y is greater than 0, a is greater than 0 and b is greater than or equal to 0, wherein the sum of positive charges in the compound equals the sum of negative charges, wherein the positive electrode further comprises a current collector having a first portion comprising a porous metal which has a first and second surface and a thickness located therebetween and comprises a plurality of pores containing the compound that extend at least partially through the thickness, wherein at least some of the pores have void spaces accessible to the electrolyte and wherein the battery cell is a rechargeable lithium ion battery cell.