Electrochemical cell including electrolyte containing bis(oxalate)borate salt
View Patent ↗An electrochemical cell includes a cathode with an aluminum current collector, a positive lead including aluminum, steel, or titanium coupled to the cathode current collector, an anode, and an electrolyte including up to 0.15M of a bis(oxalate) borate salt and an additional lithium salt.
1. An electrochemical cell comprising:
a cathode containing an aluminum current collector;
a positive lead including a metal selected from the group consisting of aluminum, titanium, and steel coupled to the aluminum current collector;
an anode comprising a material selected from the group consisting of lithium, graphite, and a lithiated metal oxide; and
an electrolyte containing (1) from 0.005 M to 0.075 M of a bis(oxalato)borate salt selected from the group consisting of metal bis(oxalate) borate salts and ammonium bis(oxalato)borate salts, and (2) a second salt comprising a lithium salt, and wherein the cathode current collector has an aluminum surface having at least one dimension greater than 1 millimeter.
2. The electrochemical cell of claim 1 , wherein the bis(oxalato)borate salt is lithium is(oxalato)borate.
3. The electrochemical cell of claim 1 , wherein the second salt is lithium trifluoromethanesulfonate.
4. The electrochemical cell of claim 1 , wherein the cathode lead comprises steel.
5. The electrochemical cell of claim 1 , wherein the anode comprises lithium.
6. An electrochemical cell comprising:
a cathode containing a current collector comprising a first aluminum alloy;
a positive lead comprising a second aluminum alloy different from the first aluminum alloy coupled to the current collector;
an anode comprising a material selected from the group consisting of lithium, graphite, and a lithiated metal oxide; and
an electrolyte containing from 0.005 M to 0.15 M of a bis(oxalato)borate salt, and a second salt comprising a lithium salt; and wherein the cathode current collector has an aluminum alloy surface having at least one dimension greater than 1 millimeter.
7. The electrochemical cell of claim 6 , wherein the bis(oxalato)borate salt is lithium bis(oxalato)borate.
8. The electrochemical cell of claim 6 , wherein the electrolyte further contains trifluoromethanesulfonate.
9. The electrochemical cell of claim 6 , wherein the electrolyte further contains a second lithium salt.
10. The electrochemical cell of claim 6 , wherein the electrolyte includes from 0.005M to 0.015M of the bis(oxalato)borate salt.
11. The electrochemical cell of claim 6 , wherein the anode comprises lithium.