METAL-AIR SECONDARY BATTERY
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United States of America Patent
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Issued Date -
Nov 23, 2017
app pub date -
May 15, 2017
filing date -
May 17, 2016
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Abstract
A metal-air battery has a positive electrode including a positive electrode conductive layer, a first catalyst layer, and a second catalyst layer. The positive electrode conductive layer is a porous layer made of conductive ceramic and has pores filled with an electrolyte solution. The first catalyst layer is a porous layer formed on a surface of the positive electrode conductive layer on the side opposite to the negative electrode, is made of conductive ceramic having a smaller average particle diameter than that of the positive electrode conductive layer, and has pores filled with the electrolyte solution. This improves charge performance. The second catalyst layer is a porous layer formed on a surface of the first catalyst layer on the side opposite to the negative electrode and is made of conductive ceramic having a larger average particle diameter than that of the first catalyst layer. This improves discharge performance.
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