POSITIVE POLE PIECE, AND ELECTROCHEMICAL DEVICE AND EQUIPMENT RELATED THERETO

This application provides a positive electrode plate and an electrochemical apparatus containing such positive electrode plate. The positive electrode plate includes a positive electrode current collector, a positive electrode active material layer disposed on at least one surface of the positive electrode current collector, and a safety layer disposed between the positive electrode active material layer and the positive electrode current collector. The safety layer includes a binding substance, a conductive substance, and a special sensitive substance. Each molecule of the special sensitive substance includes monosaccharide structural units, and carbonate groups and/or phosphate groups; and at least part of the carbonate groups and/or phosphate groups are bonded to two or more of the monosaccharide structural units. The electrochemical apparatus prepared by using the positive electrode plate of this application has significantly improved safety and electrical performance (such as cycling performance).