Production method for non-aqueous electrolyte secondary battery active material providing lithium insertion and solution contact
摘要
說明書
(Positive Electrode)
The positive electrode has, in the same manner as in the negative electrode 10 of, for example,
The positive electrode current collector is formed of a conductive material such as, for example, aluminum.
The positive electrode active material layer contains any one or more kinds of positive electrode materials capable of absorbing/releasing lithium ion, and, may contain other materials such as a binder, a conductive assistant, and a dispersant according to a design. In this case, details of the binder and the conductive assistant are the same as, for example, in the negative electrode binder and the negative electrode conductive assistant described above.
As the positive electrode material, a Li-containing compound is desirable. As the Li-containing compound, a composite oxide made of, for example, lithium and a transition metal element, or a phosphate compound having Li and the transition metal element may be used. Among these positive electrode materials, compounds containing at least one or more kinds of nickel, iron, manganese, and cobalt are preferred. Chemical formulas for these are represented by, for example, LixM1O2 or LiyM2PO4. In the formulas, M1 and M2 represent at least one or more kinds of the transition metal elements. Values of x and y show different values depending on a battery charge/discharge state, but, are generally shown by 0.5≤×≤1.10 and 0.05≤y≤1.10.
