Acid Or Moisture Reducing Agent For Non-Aqueous Electrolyte Solution, Non-Aqueous Electrolyte Solution Containing The Same, Lithium Secondary Battery Containing Non-Aqueous Electrolyte Solution, And Method For Reducing Acid or Moisture in Non-Aqueous Electrolyte Solution

A non-aqueous electrolyte solution may reduces acid and/or moisture to decrease gas generation under high temperature conditions in order to suppress degradation in battery characteristics. An acid or moisture reducing agent for the non-aqueous electrolyte solution includes a diisocyanate compound represented by Formula (1), Formula (2), or Formula (3), wherein the non-aqueous electrolyte solution includes a fluorine atom-containing cyclic carbonate: