ELECTROLYTE ADDITIVE, ELECTROLYTE, AND BATTERY

Provided are an electrolyte additive, an electrolyte, and a battery. The electrolyte additive includes a first additive and a second additive. The first additive includes a compound containing element silicon and an unsaturated hydrocarbyl group; and the second additive includes a compound represented by Formula 1. where: X, X, X, and Xare each independently selected from N or CH; R is selected from 5- to 6-membered aryl, 5- to 6-membered aryl substituted with R, 5- to 6-membered heteroaryl, 5- to 6-membered heteroaryl substituted with R, Calkyl, Calkyl substituted with R, Calkenyl, Calkenyl substituted with R, Calkylsilyl, or Calkylsilyl substituted with R; and Ris selected from Calkyl, Calkoxy, or halogen.