Abstract:
The electrode material for a lithium secondary battery according to the present invention includes particles of a solid state alloy having silicon as a main component, wherein the particles of the solid state alloy have a microcrystal or amorphous material including an element other than silicon, dispersed in microcrystalline silicon or amorphized silicon. The solid state alloy preferably contains a pure metal or a solid solution. The composition of the alloy preferably has an element composition in which the alloy is completely mixed in a melted liquid state, whereby the alloy has a single phase in a melted liquid state without pressure of two or more phases. The element composition can be determined by the kind of elements constituting the alloy and an atomic ratio of the elements.
Abstract:
An electrode material for a negative pole of a lithium secondary battery containing particles which comprises an amorphous Sn.A.X alloy having a substantially non-stoichiometric composition, wherein A represents at least one element selected from the transition metal elements, X is an optional component and represents at least one element selected from the group consiting of O, F, N, Mg, Ba, Sr, Ca, La, Ce, Si, Ge, C, P, B, Bi, Sb, Al, In, and Zn, and the content of the component Sn [Sn/(Sn+A+X)] is 20 to 80 atomic %. An electrode structure for a lithium secondary cell composed of the aforementioned electrode material for a negative electrode and a collector comprising a material which forms no alloy with lithium in an electrochemical reaction, and a lithium secondary cel having a negative pole comprising the electrode structure.
Abstract:
An electrode material for a negative pole of a lithium secondary battery containing particles which comprises and amorphous M•A•X alloy having a substantially non-stoichiometric composition, wherein M represents at least one element selected from the group consisting of Si, Ge, and Mg, A represents at least one element selected from the transition metal elements, X is an optional component and represents at least one element selected from the group consisting of O, F, N, Ba, Sr, Ca, La, Ce, C, P, S, Se, Te, B, Bi, Sb, Al, In, and Zn, and the content of the component M [M/(M+A+X)] is 20 to 80 atomic %. An electrode structure for a lithium secondary cell composed of the aforementioned electrode material for a negative electrode and a collector comprising a material which forms no alloy with lithium in an electrochemical reaction. A lithium secondary cell having a negative pole comprising the electrode structure.
Abstract:
The invention relates to a surface-modified inorganic pigment which has an inorganic pigment having acid function and an amorphous body located on the surface of the inorganic pigment having acid function and formed by at least a divalent or higher-valent metal and an anion component in a state where the inorganic pigment and the amorphous body do not chemically bond to each other, and which does not exhibit acid function.
Abstract:
A highly reliable rechargeable battery comprising an anode, a separator, a cathode, an electrolyte or an electrolyte solution, and a housing, characterized in that said anode is structured to have a size which is greater than that of said cathode. The rechargeable battery provides an increased energy density and has a prolonged charging and discharging cycle life, in which a dendrite causing a reduction in the battery performance, which is generated upon operating charging in the conventional rechargeable battery, is effectively prevented from generating or from growing in the case where it should be generated.