All solid state battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYuki Matsushita, Kazuo Yaso
Life of this patent
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Abstract
A main object of the present disclosure is to provide an all solid state battery wherein interface resistance between a current collector and an active material layer is low. In the present disclosure, the above object is achieved by providing an all solid state battery comprising: an electrode including a current collector, an electron conductive layer, and an active material layer, in this order, and a solid electrolyte layer formed on the active material layer side of the electrode, and the electron conductive layer is an agglutinate of metal particles or a metal foil, and electron conductivity of the electron conductive layer is 1×103 S/cm or more at 25° C.
Claims10
An all solid state battery comprising an electrode and a solid electrolyte layer,
- the electrode includes a current collector, an electron conductive layer, and an active material layer, in this order,
- the solid electrolyte layer formed on the active material layer side of the electrode,
- the electron conductive layer is an agglutinate of metal particles,
- electron conductivity of the electron conductive layer is 1×103 S/cm or more at 25° C.,
- the active material layer comprises an active material and an inorganic solid electrolyte, and
- the solid electrolyte layer comprises an inorganic solid electrolyte, and
- the electrode is obtained by a method comprising steps of:
- a first stack forming step of obtaining a first stack by placing the metal particles on the active material layer,
- a second stack forming step of obtaining a second stack including the electron conductive layer by hot pressing the first stack, and
- a current collector placing step of obtaining the electrode by placing the current collector on the electron conductive layer of the second stack,
- wherein the first stack is formed by coating the active material layer with a slurry including metal particles in the first stacking step, and
- the metal particles are plastically deformed in the second stack forming step.
Dependencies are inferred from the claim text.