▎ 摘　　要

NOVELTY - An electrode structure comprises cathode containing a lithium-based material or an anode containing a conductive material. A three-dimensional structure with nanofiber bonded microspheres forming a melt-convertible encapsulation layer, is formed on the electrode. The encapsulation layer comprises a network of nanofibers. The nanofibers of diameter 100- 300 nm, carry polymer microspheres on the electrode surface via stacking of layers of polymer microspheres-coated nanofiber interconnecting network. The ratio of diameter of polymer microspheres to that of nanofibers is more than 30. The mass ratio of polymer microspheres to polymer nanofibers is at least 3:1. The polymer microspheres melt to form dielectric coating to cover the surface of electrode and nanofibers, and provide medium on spreading the molten polymer microspheres, to prevent short circuit, fire or thermal runaway at 100-200degreesC. USE - The electrode structure is used in lithium ion battery. ADVANTAGE - The electrode structure is a new type of electrode structure used in lithium ion battery, in which the polymer microspheres melt to form a dielectric coating on the electrode to prevent fire or thermal runaway at 100 to 200degreesC. The electrode structure is capable of reacting immediately and resist the thermal runaway reaction within short time. DETAILED DESCRIPTION - An electrode structure comprises a cathode containing a lithium-based material selected from lithium manganese oxide (LMO), lithium cobalt oxide (LCO), lithium nickel manganese cobalt oxide (NMC) and lithium iron phosphate (LFP), or an anode containing a conductive material selected from carbon black, carbon nanotubes, graphene and graphite. A three-dimensional structure with nanofiber bonded microspheres forming a melt-convertible encapsulation layer, is formed on at least one surface of the electrode. The melt-convertible encapsulation layer comprises a network of nanofibers. The nanofibers of diameter 100- 300 nm, carry polymer microspheres on the electrode surface via stacking of layers of polymer microspheres-coated nanofiber interconnecting network. The polymer microspheres are embedded in and coated on at least one surface of the network of nanofibers. The ratio of the diameter of the polymer microspheres to the diameter of the nanofibers is more than 30. The mass ratio of the polymer microspheres to the polymer nanofibers is at least 3:1. The polymer microspheres melt to form a dielectric coating to cover the surface of the electrode and nanofibers, and provide a medium on spreading the molten polymer microspheres, to prevent short circuit, fire or thermal runaway at 100-200degreesC. An INDEPENDENT CLAIM is included for lithium ion battery comprising the electrode structure which has at least an anode, cathode, separator and at least one three-dimensional nanofiber-microspheres-incorporated, melt-convertible encapsulation layer. The encapsulation layer is applied on at least one surface of each of the anode and cathode, in the absence of an order that the anode must be followed by an encapsulation layer, the separator, and then another encapsulation layer followed by the cathode, or vice versa. DESCRIPTION OF DRAWING(S) - The drawing shows melt-convertible encapsulation layer comprising nanofibers and polymer microspheres coating on at least one surface of electrode.