▎ 摘　　要

NOVELTY - Functional coating comprises 65-90 pts. wt of matrix filler, 5-30 pts. wt. solid electrolyte, 2-10 pts. wt. titanium nitride, 1-5 pts. wt. chelating agent and 3-10 pts. wt. agglomerant. The matrix filler is aluminum oxide, silicon oxide, zinc oxide, zirconium oxide, titanium oxide, γ-aluminum oxyhydroxide or barium titanate. The solid electrolyte is electrolyte with sodium super-ion electric conductor structure, perovskite solid electrolyte, anti-perovskite solid electrolyte or garnet solid electrolyte, preferably titanium aluminum lithium and/or lithium aluminum germanium phosphate solid electrolyte. The chelating agent is dipyridyl, terpyridyl, phenanthroline or phosphoric acid. USE - The functional coating is used for anode pole piece and lithium-ion battery in portable electronic device e.g. mobile phone, digital video camera and portable computer (all claimed). ADVANTAGE - The functional coating has excellent cycle performance and multiplying power performance and high safety. DETAILED DESCRIPTION - AN INDEPENDENT CLAIM is also included for a preparation method of the anode pole piece.