Abstract: The present invention relates to an electrode coating apparatus that is capable of adjusting a temperature of electrode slurry. Also, the electrode coating apparatus for applying electrode slurry to an electrode collector includes a storage part storing the electrode slurry, a discharge part discharging the electrode slurry stored in the storage part to the electrode collector, and a heating part heating the discharge part.

Abstract: The present invention relates to a secondary battery that is capable of preventing short circuit from occurring when a nail test is performed. Also, the secondary battery includes a case accommodating an electrolyte and an electrode assembly therein, and the case includes an external layer exposed to the outside, an internal layer disposed in the case, and a short-circuit prevention layer provided in a liquid phase between the external layer and the internal layer.

Abstract: A lithium ion secondary battery including a plurality of electrode laminates, each electrode laminate including a positive electrode, a separator, and a negative electrode being alternatively laminated, each positive electrode and negative electrode having respective positive and negative electrode tabs protruding from a respective line segment, the positive electrode tabs of adjacent electrode laminates face each other and are connected to each other to provide a positive electrode tab bundle and the negative electrode tabs of the adjacent electrode laminates face each other and are connected to each other to provide a negative electrode tab bundle.

Abstract: A method of preparing an electrode for a secondary battery including: (a) a process of partially coating an electrode slurry containing an electrode mixture and a solvent on an electrode sheet so that coated portions are positioned with an uncoated portion interposed therebetween; (b) a process of drying the coated portions to remove the solvent; and (c) a process of rolling the dried coated portions, wherein a thickness of the coated portion is decreased and the electrode mixture moves to the uncoated portions, resulting in the coated portions disappearing, in the process (c).

Abstract: The present invention provides a binder for secondary battery contained in an electrode mixture, comprising a binder molecule exhibiting an adhesion to a current collector and active material particles, and a magnetic material displaying magnetism for a magnetic field applied from outside.

Abstract: The present invention relates to a secondary battery that is capable of preventing short circuit from occurring when a nail test is performed. Also, the secondary battery includes a case accommodating an electrolyte and an electrode assembly therein, and the case includes an external layer exposed to the outside, an internal layer disposed in the case, and a short-circuit prevention layer provided in a liquid phase between the external layer and the internal layer.

Abstract: A lithium ion secondary battery including a plurality of electrode laminates, each electrode laminate including a positive electrode, a separator, and a negative electrode being alternatively laminated, each positive electrode and negative electrode having respective positive and negative electrode tabs protruding from a respective line segment, the positive electrode tabs of adjacent electrode laminates face each other and are connected to each other to provide a positive electrode tab bundle and the negative electrode tabs of the adjacent electrode laminates face each other and are connected to each other to provide a negative electrode tab bundle.

Abstract: A method of preparing an electrode for a secondary battery including: (a) a process of partially coating an electrode slurry containing an electrode mixture and a solvent on an electrode sheet so that coated portions are positioned with an uncoated portion interposed therebetween; (b) a process of drying the coated portions to remove the solvent; and (c) a process of rolling the dried coated portions, wherein a thickness of the coated portion is decreased and the electrode mixture moves to the uncoated portions, resulting in the coated portions disappearing, in the process (c).

Abstract: The present invention relates to an electrode coating apparatus that is capable of adjusting a temperature of electrode slurry. Also, the electrode coating apparatus for applying electrode slurry to an electrode collector includes a storage part storing the electrode slurry, a discharge part discharging the electrode slurry stored in the storage part to the electrode collector, and a heating part heating the discharge part.

Abstract: The present invention provides a binder for secondary battery contained in an electrode mixture, comprising a binder molecule exhibiting an adhesion to a current collector and active material particles, and a magnetic material displaying magnetism for a magnetic field applied from outside.

Abstract: The present invention relates to a container for a stirrer used in a stirrer stirring objects through a centrifugal force. The container for the stirrer includes a container body of which the top is opened and in which a receiving space is formed, an outer lid coupled to the top of the container body, and a crushing unit including a supporting member disposed in the receiving space, and a crushing member extending outward from the supporting member and crushing and stirring the objects received in the receiving space. Thus, nanoparticle-sized objects can be rapidly crushed and stirred without agglomeration.

Abstract: Provided are a cathode active material having high capacity and excellent lifetime characteristics as well as being inexpensive by mixing transition metal oxide having high irreversible capacity with composite dimensional manganese oxide (CDMO) of the following Chemical Formula 1, which has high capacity and good lifetime characteristics but is difficult to be charged and discharged by being used alone, and a lithium secondary battery including the cathode active material: xMnO2.(1?x)Li2MnO3 (0<x<1).

Abstract: The present invention relates to a container for a stirrer used in a stirrer stirring objects through a centrifugal force. The container for the stirrer includes a container body of which the top is opened and in which a receiving space is formed, an outer lid coupled to the top of the container body, and a crushing unit including a supporting member disposed in the receiving space, and a crushing member extending outward from the supporting member and crushing and stirring the objects received in the receiving space. Thus, nanoparticle-sized objects can be rapidly crushed and stirred without agglomeration.

Abstract: Provided are a cathode active material having high capacity and excellent lifetime characteristics as well as being inexpensive by mixing transition metal oxide having high irreversible capacity with composite dimensional manganese oxide (CDMO) of the following Chemical Formula 1, which has high capacity and good lifetime characteristics but is difficult to be charged and discharged by being used alone, and a lithium secondary battery including the cathode active material: xMnO2·(1?x)Li2MnO3(0<x<1).