Flame retardant additive, electrolyte, battery and electric equipment

The invention provides a flame retardant additive, an electrolyte, a battery and electric equipment. The flame retardant additive comprises at least one of repetitive units shown in a formula (I) and a formula (II), # imgabs0, and R1, R2 and R3 are independently selected from substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted cycloalkyl, or substituted or unsubstituted silyl. The electrolyte with the flame-retardant additive has an excellent flame-retardant effect, improves the use safety of the battery and electric equipment, can keep better cycle performance of the battery, and is beneficial to the use of the battery. 本申请提供了阻燃添加剂、电解液、电池和用电设备。阻燃添加剂包括式(I)和式(II)所示的重复单元中的至少一种，#imgabs0#其中，所述R1、所述R2、所述R3独立地选自取代或未取代的烷基、取代或未取代的芳基、取代或未取代的环烷基、或者取代或未取代的硅烷基。具有该阻燃添加剂的电解液具有优异的阻燃效果，提高了电池和用电设备的使用安全性，同时能够使电池保持较好的循环性能，有利于电池的使用。