Lithium secondary battery and cathode of the lithium secondary battery with conductive bonding layer

A lithium secondary battery comprising at least the following:

• a cathode having a cathode active material layer which is formed of a sintered lithium composite oxide sheet having a thickness of 30 μm or more, a mean pore size of 0.1 to 5 μm, and a voidage of 3% or more and less than 15%, and a cathode collector bonded to the cathode active material layer by the mediation of a conductive bonding layer;
• an anode containing as an anode active material a carbonaceous material or a lithium-occluding substance;
• and
• an electrolyte disposed so as to intervene between the cathode and the anode,
• wherein the sintered lithium composite oxide sheet has a layered rock salt structure,
• wherein the sintered lithium composite oxide sheet exhibits a ratio of intensity of X-ray diffraction by the (003) plane to intensity of X-ray diffraction by the (104) plane, [003]/[104], of 0.7 or less, and
• wherein the intensity of X-ray diffraction is attained by measuring an X-ray diffraction profile of the plate surface of the sheet.