Power storage device and electronic device

  • US 10,497,979 B2
  • Filed: 09/30/2015
  • Issued: 12/03/2019
  • Est. Priority Date: 10/10/2014
  • Status: Active Grant
First Claim
Patent Images

1. A power storage device comprising:

  • a positive electrode;

    a separator;

    a negative electrode; and

    an electrolytic solution,wherein the separator is provided between the positive electrode and the negative electrode,wherein the positive electrode includes a positive electrode active material layer and a positive electrode current collector,wherein the negative electrode includes a negative electrode current collector, a first negative electrode active material layer facing the positive electrode active material layer with the separator sandwiched therebetween, a second negative electrode active material layer facing the first negative electrode active material layer with the negative electrode current collector sandwiched therebetween, a first coating film in contact with the first negative electrode active material layer, and a second coating film in contact with the second negative electrode active material layer,wherein the first coating film is formed by reaction between the electrolytic solution and the first negative electrode active material layer, andwherein the electrolytic solution includes an alkali metal salt and an ionic liquid.

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