A lithium-ion battery, comprising a positive electrode plate, a negative electrode plate, a separator located between the positive electrode plate and the negative electrode plate, and an electrolytic solution, wherein a lithium-supplementing layer with a smooth surface and a first functional coating are sequentially disposed on a surface of the negative electrode plate, the surface being close to the separator; a second functional coating is disposed on a surface of the separator, the surface being close to the negative electrode plate, wherein an inorganic coating is disposed between the separator and the second functional coating, the inorganic coating comprises an inorganic particulate material, and the inorganic particulate material is one or more selected from aluminum oxide, silicon monoxide, silicon dioxide, zirconium dioxide, manganese oxide, magnesium oxide, calcium oxide, and calcium carbonate; wherein both the first functional coating and the second functional coating contain an organic porous particulate material, and a compressibility S of the organic porous particulate material ranges from 40% to 90%; wherein, S = (H - h)/H, and H represents an original particle height of the organic porous particulate material, and h represents a particle height of the organic porous particulate material that has been pressed for 1 minute under a pressure of 2 Mpa; wherein the inorganic coating is 0.5 μm to 10 μm in thickness, and the first functional coating and the second functional coating are each 5 μm to 70 μm in thickness; and wherein the organic porous particulate material is one or more selected from polyacrylate, polypropylene, polyethylene, polyamide, polyborate, polysulfone, polyarylate, polyvinylpyridine, and polyaniline. a lithium-supplementing layer with a smooth surface and a first functional coating are sequentially disposed on a surface of the negative electrode plate, the surface being close to the separator; a second functional coating is disposed on a surface of the separator, the surface being close to the negative electrode plate, wherein an inorganic coating is disposed between the separator and the second functional coating, the inorganic coating comprises an inorganic particulate material, and the inorganic particulate material is one or more selected from aluminum oxide, silicon monoxide, silicon dioxide, zirconium dioxide, manganese oxide, magnesium oxide, calcium oxide, and calcium carbonate; wherein both the first functional coating and the second functional coating contain an organic porous particulate material, and a compressibility S of the organic porous particulate material ranges from 40% to 90%; wherein, S = (H - h)/H, and H represents an original particle height of the organic porous particulate material, and h represents a particle height of the organic porous particulate material that has been pressed for 1 minute under a pressure of 2 Mpa; wherein the inorganic coating is 0.5 μm to 10 μm in thickness, and the first functional coating and the second functional coating are each 5 μm to 70 μm in thickness; and wherein the organic porous particulate material is one or more selected from polyacrylate, polypropylene, polyethylene, polyamide, polyborate, polysulfone, polyarylate, polyvinylpyridine, and polyaniline.