DIAPHRAGM AND HIGH-VOLTAGE BATTERY COMPRISING SAME

A diaphragm and a high-voltage battery including the diaphragm. A modification layer is coated on a surface of an inorganic ceramic particle, the modification layer can adsorb transition metal ions precipitated from an electrode material, thereby preventing the transition metal ions from forming transition metal precipitates on a surface of a negative electrode and improving safety, rate performance and cycle performance of the battery. At the same time, since the modification layer is coated on the surface of the inorganic ceramic particle, thus it will not have a significant impact on an internal resistance of the battery, and thereby not reducing the rate, low temperature, and cycle performances of the battery.