JP2020009548A5 - - Google Patents

Claims (6)

In a storage device capable of inserting and removing lithium ions, which is composed of at least a negative electrode, a lithium ion conductor, and a positive electrode, and the lithium ion conductor is provided between the negative electrode and the positive electrode in contact with the positive and negative electrodes, at least the said. A one-dimensional structure in which conjugated π-electron systems having a structure in which double bonds and single bonds are alternately arranged on the surface of either the negative electrode or the positive electrode are connected along a linear molecular chain, and ester bonds, ether bonds, and thioethers. It is coated with a layer consisting of one or more structures selected from the group of (sulfide) bonds, carbonyl groups, and cyclic structures, and the coating layer contains a thermoplastic resin and lithium ion conductive particles that are easily deformed by heating.
At least one of the negative electrode and the positive electrode is conjugated with a structure in which at least an active material, a conductive auxiliary agent, a thermoplastic resin easily deformed by heating, lithium ion conductive particles, and double bonds and single bonds are alternately arranged. It consists of a polymer or oligomer with a one-dimensional structure in which the π-electron system is connected along a linear molecular chain.
The main active material of the negative electrode is fine powder of one or more kinds of materials selected from the group consisting of silicon, silicon alloy, silicon oxide, and tin alloy.
A power storage device characterized by this. The layer covering the surface of either the negative electrode or the positive electrode is formed by connecting conjugated π-electron systems having a structure in which at least the branched portions of the stem polymer are alternately double-bonded and single-bonded along a linear molecular chain. It is a conductive polymer structure having a one-dimensional structure, and is composed of a graft polymer having a crosslinked structure containing one or more bonds selected from the group of ester bonds, ether bonds, thioether (sulfide) bonds, carbonyl groups, and cyclic structures. The power storage device according to claim 1, characterized by this. The lithium ion conductor provided between the negative electrode and the positive electrode is double-layered with at least a glass fiber non-woven fabric having an average fiber diameter of 1 μm or less, a thermoplastic resin easily deformed by heating, and lithium ion conductive solid electrolyte particles. The power storage device according to claim 1, wherein the conjugated π-electron system having a structure in which bonds and single bonds are alternately arranged is composed of a polymer or an oligomer having a one-dimensional structure in which the conjugated π-electron system is connected along a linear molecular chain. The lithium ion conductive particles consist of a group consisting of a sulfide-based lithium ion conductor, a NASICON type lithium ion conductor, a perovskite type lithium ion conductor, a garnet type lithium ion conductor, tungsten oxide, molybdenum oxide, and niobium oxide. The power storage device according to claim 1 , wherein the storage device is one or more types of ion conductive particles to be selected. At least a linear molecule of a glass fiber non-woven fabric with an average fiber diameter of 1 μm or less, a thermoplastic resin, lithium ion conductive solid electrolyte particles, and a conjugated π-electron system having a structure in which double bonds and single bonds are alternately arranged. It consists of a one-dimensional conductive polymer or oligomer that runs along a chain.
The ratio of the thermoplastic resin is 20 to 50% by weight, the ratio of the conductive polymer or oligomer is 10 to 50% by weight, the ratio of the lithium ion conductive solid electrolyte particles is 20 to 60% by weight, and the non-woven fabric of the glass fiber. A sheet-like solid electrolyte for a power storage device, characterized in that the ratio of the above is 10 to 50% by weight. One or more types of solids in which the lithium ion conductive solid electrolyte particles are selected from the group consisting of sulfide-based lithium ion conductors, NASICON type lithium ion conductors, perovskite type lithium ion conductors, and garnet type lithium ion conductors. The sheet-like solid electrolyte for a power storage device according to claim 6, which is an electrolyte particle.