摘要:
A negative electrode for a lithium ion battery 10 includes a negative electrode current collector 11, a negative electrode active material layer 14, and a lithium silicate layer 15. The negative electrode active material layer 14 contains silicon. The lithium silicate layer 15 contains lithium, oxygen, and silicon forming a Li—O—Si bond, and is formed at the interface between the negative electrode current collector 11 and the negative electrode active material layer 14. The negative electrode active material layer 14 and the lithium silicate layer 15 may be composed of columnar bodies.
摘要:
A negative electrode for a lithium ion battery 10 includes a negative electrode current collector 11, a negative electrode active material layer 14, and a lithium silicate layer 15. The negative electrode active material layer 14 contains silicon. The lithium silicate layer 15 contains lithium, oxygen, and silicon forming a Li—O—Si bond, and is formed at the interface between the negative electrode current collector 11 and the negative electrode active material layer 14. The negative electrode active material layer 14 and the lithium silicate layer 15 may be composed of columnar bodies.
摘要:
A secondary battery comprising: a substrate; a first current collector; a first electrode; a solid electrolyte; a second electrode; and a second current collector; the first current collector being formed on the substrate and serving as a current collector of the first electrode, the first electrode being formed on the first current collector, the solid electrolyte being formed on the first electrode, the second electrode being formed on the solid electrolyte, the second current collector being formed on the second electrode and serving as a current collector of the second electrode, at least one electrode selected from the group consisting of the first electrode and the second electrode containing at least one material selected from the group consisting of an ion conductive material and an electron conductive material.
摘要:
An all solid state battery comprising: (a) a positive electrode current collector layer, (b) a positive electrode active material layer carried on the positive electrode current collector layer, (c) a negative electrode current collector layer, (d) a negative electrode active material layer carried on the negative electrode current collector layer, (e) a solid electrolyte layer interposed between the positive and negative electrode active material layers, and (f) a substrate carrying either of the positive and negative electrode current collector layers, the substrate comprising a metal sheet and a coating layer covering the surface of the metal sheet, the coating layer comprising at least one metal nitride layer.
摘要:
The present invention relates to a current collector including a base portion with a flat face, primary projections projecting from the flat face, and secondary projections projecting from the top of the primary projections. The present invention also relates to a current collector including a base portion with a flat face and primary projections projecting from the flat face, wherein the roughening rate of the top of the primary projections is 3 to 20. By using such a current collector, separation of the active material from the current collector can be inhibited when using an active material that has a high capacity but undergoes a large expansion at the time of lithium ion absorption.
摘要:
In a negative electrode active material for a lithium ion secondary battery including a silicon oxide capable of absorbing and desorbing lithium ions, a silicon oxide having structural units each in the form of a tetrahedron in which a silicon atom is located at its center and silicon or oxygen atoms are located at its four vertices is used. The structural units are arranged randomly to form an amorphous structure. In the case that the number of oxygen atoms located at the four vertices in the structural units is represented by n (n=0, 1, 2, 3 or 4) and the structural units are represented by Si(n), the number of the structural units NSi(n) in the silicon oxide satisfies the following relations (1) to (3). [ Formula 1 ] NSi ( 0 ) ∑ NSi ( n ) ≥ 0.1 ( 1 ) Nsi ( 4 ) ∑ NSi ( n ) ≤ 0.1 ( 2 ) Nsi ( 1 ) + NSi ( 2 ) + Nsi ( 3 ) ≠ 0 ( 3 )
摘要:
The present invention relates to a current collector including a base portion with a flat face, primary projections projecting from the flat face, and secondary projections projecting from the top of the primary projections. The present invention also relates to a current collector including a base portion with a flat face and primary projections projecting from the flat face, wherein the roughening rate of the top of the primary projections is 3 to 20. By using such a current collector, separation of the active material from the current collector can be inhibited when using an active material that has a high capacity but undergoes a large expansion at the time of lithium ion absorption.
摘要:
In a negative electrode active material for a lithium ion secondary battery including a silicon oxide capable of absorbing and desorbing lithium ions, a silicon oxide having structural units each in the form of a tetrahedron in which a silicon atom is located at its center and silicon or oxygen atoms are located at its four vertices is used. The structural units are arranged randomly to form an amorphous structure. In the case that the number of oxygen atoms located at the four vertices in the structural units is represented by n (n=0, 1, 2, 3 or 4) and the structural units are represented by Si(n), the number of the structural units NSi(n) in the silicon oxide satisfies the following relations (1) to (3). [ Formula 1 ] NSi ( 0 ) ∑ NSi ( n ) ≥ 0.1 ( 1 ) Nsi ( 4 ) ∑ NSi ( n ) ≤ 0.1 ( 2 ) Nsi ( 1 ) + NSi ( 2 ) + Nsi ( 3 ) ≠ 0 ( 3 )
摘要:
To provide an electrochemical device with a layer structure causing no deterioration of characteristics of materials, in the method for preparing an electrochemical device comprising a first current collector, a first electrode active material layer, a solid electrolyte layer, a second electrode active material layer and a second current collector, all of which are accumulated, the first electrode active material layer, the second electrode active material layer or the solid electrolyte layer is formed by supplying atoms, ions or clusters constituting the first electrode active material layer, the second electrode active material layer or the solid electrolyte layer to the substrate, while irradiating electrons or electromagnetic waves with energy prescribed according to the composition of the first electrode active material layer, the second electrode active material layer or the solid electrolyte layer.
摘要:
In a charge/discharge method for a positive-electrode active material in a lithium secondary battery, the lithium secondary battery includes a positive electrode containing a positive-electrode active material capable of occluding and releasing lithium ions, a negative electrode containing a negative-electrode active material capable of occluding and releasing lithium ions, a separator located between the positive electrode and the negative electrode, and an electrolyte having a lithium ion conductivity; and the positive-electrode active material contains a nickel-type lithium-containing complex oxide. The positive electrode, which has been charged, is discharged until having a first potential VDp1 which is no less than 2.7 V and no more than 3.4 V on a lithium metal basis, and then the discharge is finished. Owing to this, the charge/discharge cycle life can be improved while the capacity of the lithium secondary battery is secured.