Storage battery, battery control unit, and electronic device

Abstract

A storage battery includes positive and negative electrodes and an electrolytic solution. The negative electrode includes a first element and carbon. The first element is any of silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium. The negative electrode includes an active material and a first layer in contact with a surface of the active material. The first layer has a thickness of 10 nm to 1000 nm inclusive. The electrolytic solution contains first and second cations. The first cation is one or more of a lithium ion, a sodium ion, a calcium ion, and a magnesium ion. The second cation is an imidazolium cation or a tertiary sulfonium cation.

What is claimed is: 
     
         1 . A storage battery comprising:
 a positive electrode;   a negative electrode; and   an electrolytic solution,   wherein the negative electrode includes a first element and carbon,   wherein the first element is any of silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium,   wherein the negative electrode includes an active material and a first layer in contact with a surface of the active material,   wherein the first layer includes a portion with a thickness larger than or equal to 10 nm and smaller than or equal to 1000 nm,   wherein the electrolytic solution includes a first cation and a second cation,   wherein the first cation is one or more of a lithium ion, a sodium ion, a calcium ion, and a magnesium ion, and   wherein the second cation is an imidazolium cation or a tertiary sulfonium cation.