Hereinafter, an active material film, an electrode for a secondary battery, a secondary battery, and a method of producing the same according to the present invention will be described in detail with reference to the accompanying drawings. The drawings provided below are provided by way of example so that the spirit of the present invention can be sufficiently transferred to a person skilled in the art to which the present invention pertains. Therefore, the present invention is not limited to the drawings provided below but may be embodied in other forms, and the drawings suggested below may be exaggerated in order to clear the spirit of the present invention. Technical terms and scientific terms used herein have the general meaning understood by those skilled in the art to which the present invention pertains unless otherwise defined, and a description for the known function and configuration unnecessarily obscuring the gist of the present invention will be omitted in the following description and the accompanying drawings. Throughout the present specification, unless explicitly described to the contrary, “comprising” any elements will be understood to imply further inclusion of other elements rather than the exclusion of any other elements. In addition, unless explicitly described the contrary, a singular form includes a plural form herein.
In the above description of the method of producing an electrode, the active material film, the electrode, or the secondary battery according to the present invention, an active material bulk is a lone independent three-dimensional body containing an electrode active material, and may mean a three-dimensional body in the state of being capable of free-standing which may maintain a constant form itself and support the weight itself.