Abstract: Disclosed are an organic coating layer, an electrode active material including the organic coating layer, and an electrode and a battery that include the electrode active material. The organic coating layer includes a lithiated polymer, and the polymer is a copolymer of a diisocyanate and an alcohol compound. The organic coating layer in the present disclosure can effectively suppress occurrence of an interface side reaction and electrode expansion, to improve cycling performance of the battery. The electrode active material includes an active material and the organic coating layer coated on a surface of the active material. The electrode active material in the present disclosure has an excellent ionic conductivity and lithium-ion conducting capability.

Abstract: The present disclosure provides a negative electrode sheet and a lithium-ion battery including same. A negative electrode active material, a conductive agent, a binder, and an auxiliary agent (a compound represented by Formula 1) are used in the negative electrode sheet of the present disclosure, the above substances are dissolved in a solvent, uniformly mixed, and coated on a surface of a negative electrode current collector, after drying, the negative electrode sheet of the present disclosure can be obtained. The auxiliary agent (the compound represented by Formula 1), due to its small molecular weight and short polymer chain segment, can be fully mixed with the negative electrode active material, conductive agent, and binder.