Battery

Abstract

A battery capable of improving battery characteristics such as cycle characteristics and high temperature storage characteristics is provided. An anode includes an anode active material which includes Sn or Si as an element. A separator is impregnated with an electrolyte solution, and the electrolyte solution includes an acid anhydride such as succinic anhydride or a derivative thereof. Thereby, a coating is formed on the anode, and the decomposition of the electrolyte solution in the anode can be prevented. An electrolyte solution to which 4-fluoro-1,3-dioxolane-2-one is mixed is more preferably used.

1 . A battery, comprising:
 a cathode;   an anode; and   an electrolyte solution,   wherein the anode includes an anode active material that Includes a CoSnC-containing material, and a ratio of cobalt to a total amount of tin and cobalt ranging from about 30 wt % to about 70 wt % inclusive,   wherein the electrolyte solution includes at least one additive selected from the group consisting of acid anhydrides and derivatives thereof.   
     
     
         2 . The battery according to  claim 1 , wherein the additive is a cyclic compound including a —C(═O)—O—C(═O)— group in a ring. 
     
     
         3 . The battery according to  claim 1 , wherein a content of the additive in the electrolyte solution ranges from about 0.001 wt % to about 10 wt %. 
     
     
         4 . The battery according to  claim 1 , wherein the electrolyte solution includes at least one of 4-fluoro-1,3-dioxolane-2-one and 4-chloro-1,3-dioxolane-2-one. 
     
     
         5 . The battery according to  claim 1 , wherein the anode active material further includes at least one constituent selected from the group consisting of silicon, nickel, copper, iron, manganese, zinc, indium, silver, titanium, germanium, bismuth, antimony, chromium, niobium, molybdenum, aluminum, phosphorus and gallium. 
     
     
         6 . The battery according to  claim 1 , wherein in the CoSnC-containing material, a is peak of the carbon is obtained in a region lower than 284.5 eV by X-ray photoelectron spectroscopy. 
     
     
         7 . The battery according to  claim 1 , wherein in the CoSnC-containing material includes a reactive phase which can react with lithium and of which a half-width of a diffraction peak obtained by X-ray diffraction is 1.0° or more. 
     
     
         8 . The battery according to  claim 1 , wherein the battery is rechargeable.