Cathode of three-dimensional lithium secondary battery and method of fabricating the same
A cathode of a three-dimensional lithium secondary is defined by a sintered body including a cathode active material, in which a thickness of the sintered body is in a range of about 5 μm to about 30 μm, and an electrode density of the sintered body is in a range of about 3.7 g/cc to about 4.6 g/cc. The cathode active material may include a lithium cobalt oxide.
1. A cathode of a three-dimensional lithium secondary battery, wherein
the cathode is defined by a sintered body comprising a cathode active material,
a thickness of the sintered body is in a range of about 5 μm to about 30 μm, and
an electrode density of the sintered body is in a range of about 3.7 g/cc to about 4.6 g/cc,
wherein the cathode is disposed on a cathode collector of the three-dimensional lithium secondary battery to be perpendicular to the cathode collector.
2. The cathode of the three-dimensional lithium secondary battery of claim 1 , wherein the cathode active material comprises a plurality of elliptical or circular grains which is irregularly stacked when viewed in a side cross-sectional view of the cathode.
3. The cathode of a three-dimensional lithium secondary battery of claim 1 , wherein the electrode density of the sintered body is in a range of about 4.0 g/cc to about 4.6 g/cc.
4. The cathode of the three-dimensional lithium secondary battery of claim 1 , wherein the cathode active material comprises a lithium transition metal oxide.
5. The cathode of the three-dimensional lithium secondary battery of claim 4 , wherein the cathode active material comprises a lithium cobalt oxide.
6. The cathode of the three-dimensional lithium secondary battery of claim 1 , wherein the cathode comprises an inner collector and cathode layers, which are respectively disposed on opposite sides of the inner collector.