| abstract |
A battery is provided. A battery according to an embodiment of the present invention includes a positive electrode having a positive electrode active material coated on a part or all of a positive electrode, a negative electrode having a nano web layer on both sides of a negative electrode current collector coated with a negative electrode active material on a part or all of the negative electrode and the An electrode assembly including a separator interposed between the anode and the cathode; Electrolyte solution; And an exterior material that encapsulates the electrolyte solution and the electrode assembly together. According to this, even if the inside of the battery is raised due to the provision of the porous nanoweb layer, even if shrinkage or melting of the separator occurs, contact between the positive electrode and the negative electrode is prevented to cause ignition and/or explosion, and ion exchange is not disturbed. Battery performance may not occur. In addition, even at high temperatures, the nanoweb layer does not melt, the nanoweb layer may not be released as a separator, and cracks can be prevented even when an external force is applied, and even if repeated external force such as repetitive vibration is applied, it is required as a battery. It can prevent or minimize the deterioration of physical properties. The battery of the present invention can be applied to various electronic devices requiring flexibility of a battery, such as a smart watch and a watch band, as well as a rollable display. |