摘要:
Disclosed is a negative electrode active material for electrical devices, comprising an alloy having a composition represented by the formula: Si x C y Al z . In the composition formula: Si x C y Al z , x, y and z represent mass percent values and satisfy the following conditions: x + y + z = 100; 36 ‰¤ x
摘要:
To provide a means capable of improving the cycle durability of an electric device such as a lithium ion secondary battery. A negative electrode active material which includes a silicon-containing alloy having a composition represented by Chemical Formula (I) : Si x Sn y M z A a (where, A is unavoidable impurities, M is one or two or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0
摘要:
[TECHNICAL PROBLEM] To provide a negative electrode for an electric device, such as a Li ion secondary battery, exhibiting good balanced characteristics of providing initial capacity and maintaining high cycle characteristics. [SOLUTION TO PROBLEM] The negative electrode for an electric device includes: a current collector; and an electrode layer containing a negative electrode active material, an electrically-conductive auxiliary agent and a binder and formed on a surface of the current collector. The negative electrode active material is a mixture of a carbon material and an alloy represented by the following formula (1): Si x Sn y M z A a ...(1) (in formula (1), M is at least one metal selected from the group consisting of Al, V, C, and combinations thereof, A is inevitable impurity, x, y, z, and a represent mass percent values and satisfy 0
摘要:
[TECHNICAL PROBLEM] There is provided a negative electrode for an electric device such as a Li ion secondary battery capable of exhibiting well-balanced characteristics of a high cycle property and a high initial capacity. [SOLUTION TO PROBLEM] The negative electrode for an electric device includes a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector, wherein the negative electrode active material contains an alloy represented by the following formula (1): Si x Ti y M z A a (in the formula (1), M is at least one metal selected from the group consisting of Ge, Sn, Zn and a combination thereof, A is inevitable impurities, and x, y, z and a represent mass percent values and satisfy the conditions of 0
摘要:
[TECHNICAL PROBLEM] There is provided a negative electrode for an electric device such as a Li ion secondary battery capable of exhibiting well-balanced characteristics of a high cycle property and a high initial capacity. [SOLUTION TO PROBLEM] The negative electrode for an electric device includes a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector, wherein the negative electrode active material contains an alloy represented by the following formula (1): Si x Zn y M z A a (in the formula (1), M is at least one metal selected from the group consisting of V, Sn, Al, C and a combination thereof, A is inevitable impurities, and x, y, z and a represent mass percent values and satisfy the conditions of 0
摘要:
A negative electrode active material for an electric device includes an alloy containing Si in a range from greater than or equal to 17% by mass to less than 90% by mass, Ti in a range from 10% by mass to 83% by mass exclusive, Ge in a range from 0% by mass to 73% by mass exclusive, and inevitable impurities as a residue. The negative electrode active material can be obtained with a multi DC magnetron sputtering apparatus by use of, for example, Si, Ti and Ge as targets. An electric device employing the negative electrode active material can achieve long cycle life, and ensure a high capacity and improved cycle durability.
摘要:
There is provided a means capable of improving cycle durability of an electric device such as a lithium ion secondary battery. A negative electrode active material formed from a Si-containing alloy having a composition represented by Chemical Formula (1) : Si x Sn y M z A a Li b (In the above Chemical Formula (1), M represents one or two or more transition metal elements, A represents an inevitable impurity, and x, y, z, a, and b represent values of mass%, wherein 0
摘要:
The present invention is to provide a means capable of realizing sufficient cycle durability while sufficiently taking advantage of the high capacity characteristics which are a feature of a solid-solution positive electrode active material in an electric device such as a lithium ion secondary battery having a positive electrode using a solid-solution positive electrode active material. In an electric device having a power generating element including a positive electrode in which a positive electrode active material layer containing a positive electrode active material is formed on the surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing a negative electrode active material is formed on the surface of a negative electrode current collector, and a separator, the negative electrode active material layer contains a negative electrode active material represented by Formula (1), the positive electrode active material layer contains a positive electrode active material (solid-solution positive electrode active material) represented by Formula (2), and, at this time, one that has a structure in which a silicide phase containing a silicide of a transition metal is dispersed in a parent phase containing amorphous or low crystalline silicon as a main component, a predetermined composition, and a ratio value (B/A) of a diffraction peak intensity B of a silicide of a transition metal in a range of 2¸ = 37 to 45° to a diffraction peak intensity A of a (111) plane of Si in a range of 2¸ = 24 to 33° in a predetermined range in an X-ray diffraction measurement using a CuK±1 ray is used as a Si-containing alloy contained in the negative electrode active material layer and a solid solution having a predetermined composition or an oxide-coated solid solution in which a coating layer containing an oxide in a predetermined amount is formed on the particle surface of the solid solution is used as a solid-solution positive electrode active material contained in the positive electrode active material layer.