LITHIUM-ION SECONDARY BATTERY AND METHOD OF PRODUCING SAME

There is provided a lithium-ion secondary battery comprising positive and negative electrodes, a separator element, an electrical conductor element and a binder, wherein the positive electrode comprises a lithium-containing metal phosphate compound coated with a carbon material having at least one phase selected from a graphene phase and an amorphous phase, and further comprises carbon black and a fibrous carbon material and wherein the negative-electrode material comprises a graphite carbon material having at least one carbon phase selected from a graphene phase and an amorphous phase, and further comprises carbon black and a fibrous carbon material, and wherein the binder comprises a water-soluble synthetic resin or a water-dispersible synthetic resin. The most preferred positive electrode comprises LiFePO4 The most preferred negative electrode comprises artificial graphite or graphitazable powder. The most preferred binder is carboxyl methyl cellulose further comprising a surface active agent. Also provided is a method of making the lithium-ion secondary battery of the present invention.