Lithium-ion battery
A lithium-ion battery includes a positive electrode, a negative electrode, and a battery case. The positive electrode includes a positive current collector, a first material of the form Li 1−x MO 2 , where M is a metal, and a second material including carbon. The negative electrode includes a negative current collector, a third material including a lithium titanate material, and a fourth material including carbon. The battery case includes titanium and at least partially surrounds the positive and negative electrodes.
1. A lithium-ion battery comprising:
a positive electrode comprising:
a positive current collector;
a first material comprising LiCoO 2 , LiNiO 2 , or LiMnO 2 , the first material being an active material; and
a second material comprising carbon, the second material being conductive; and
a negative electrode comprising:
a negative current collector;
a third material comprising a lithium titanate material, the third material being another active material; and
a fourth material comprising carbon, the fourth material being conductive;
a liquid electrolyte; and
a battery case comprising titanium, at least partially surrounding the positive and negative electrodes;
wherein the positive electrode and the negative electrode are wound electrodes; and
wherein a charging and discharging capacity of the positive electrode at a zero voltage crossing potential is below a corrosion potential of the negative current collector and above a decomposition potential of the first material.
2. The lithium-ion battery of claim 1 , wherein the first material comprises LiCoO 2 .
3. The lithium-ion battery of claim 1 , wherein the first material comprises LiNiO 2 .
4. The lithium-ion battery of claim 1 , wherein the first material comprises LiMnO 2 .
5. The lithium-ion battery of claim 1 , wherein the positive and negative current collectors comprise a thin foil comprising aluminum.
6. The lithium-ion battery of claim 5 , wherein the first material comprises LiCoO 2 .
7. The lithium-ion battery of claim 6 , wherein the fourth material comprises carbon black.
8. The lithium-ion battery of claim 7 , further comprising:
an electrolyte comprising lithium hexafluorophosphate and ethylene carbonate.
9. The lithium-ion battery of claim 8 , wherein the positive and negative electrodes further comprise a binder comprising polyvinylidene fluoride.
10. The lithium-ion battery of claim 5 , wherein the first material comprises LiNiO 2 .
11. The lithium-ion battery of claim 5 , wherein the first material comprises LiMnO 2 .