摘要:
An alloy capable of reversibly absorbing and desorbing lithium ions in a non-aqueous electrolyte containing lithium ions on charging and discharging has excellent applicability to anode for rechargeable electrochemical devices. However, such alloy, when absorbed with lithium, loses its flexibility, so that when it is incorporated in a device in a charged state, it is subject to trouble such as cracking and can not display its properties. This invention adopts a method in which anode alloy is combined with lithium by connecting them so as to be electronically conductive to each other and this combination is fitted into the device, and then the electrolyte is supplied into the device to have lithium absorbed in anode alloy in the device. According to this method, cracking of cathode can be prevented.
摘要:
A rechargeable negative electrode for an electrochemical apparatus using nonaqueous electrolytes, said electrode comprising an alloy comprising (1) at least one metal selected from the group consisting of Sn, Pn, In and Bi and (2) Zn or Zn and Cd, as well as a rechargeable electrochemical apparatus comprising a combination of said negative electrode with a positive electrode having reversibility in charging and discharging. The above-mentioned negative electrode reversibly absorbs and desorbs alkali metal ions, as the result of charge and discharge, in nonaqueous electrolyte containing alkali metal ions. It undergoes no pulverization even after repeated charge and discharge, and maintains its shape stably, so that it has a long charge-and-discharge cycle life. Further, since it can absorb a large quantity of alkali metal per unit volume, it is of high energy density.
摘要:
A rechargeable electrochemical device composed of a negative electrode (4) which comprises an alkali metal as an active material, a non-aqueous electrolyte (6), and a positive electrode (1). The positive electrode (1) is composed of an oxide of chromium and vanadium represented by the general formula:Cr.sub.x V.sub.2(1-x) O.sub.5-(2+y)x(wherein 0.2.ltoreq.x.ltoreq.0.9, 0.1.ltoreq.y.ltoreq.1.0). The rechargeable electrochemical device offers a high discharge voltage, a large discharge capacity, linear discharge voltage, and the capacity to withstand over-charging.
摘要:
A cell composed of an anode with a light metal as an active material, a cathode with manganese dioxide as an active material, and an organic electrolyte. The cathode contains an alkaline earth metal oxide. The cell is superior in storage with the swelling of the cell and the increase of the cell impedance is little during the preservation.
摘要:
An improved active material for the positive electrode of a battery comprising carbon fluoride obtained by fluorinating carbon having a lattice constant of 3.40-3.50 A in its (002) plane. The carbon is selected from among petroleum cokes and coal cokes. The resulting battery has excellent discharge and shelf life characteristics.
摘要:
This invention relates to improvement in an organic electrolyte battery employing a light metal as an anodic material; organic electrolyte; and CuO as a cathodic material.By using, as the cathodic material, the solid solution of alkali metal oxide and CuO as a mother substance, the delivered volumetric energy density of the battery is fairly increased.
摘要:
The present invention provides a method for detecting a fully charged condition of a secondary battery by which the fully charged condition of a secondary battery can be detected accurately and deterioration in battery characteristic due to overcharging can be restrained irrespective of the charging mode and the surroundings, without the need for a special battery structure. In the method, pulse vibrations generated inside a secondary battery being charged are detected, and when the obtained characteristic value of the pulse vibrations, for example, incidence of generation of the vibrations reaches a predetermined value, the secondary battery is determined to be in fully charged condition.
摘要:
A positive electrode active material and a positive electrode for an alkaline storage battery are disclosed which exhibit high charge efficiency at a high temperature. The positive electrode active material comprises particles formed by agglomeration of crystals of nickel hydroxide active material, at least the surface layer of the particles containing a solid solution nickel hydroxide with manganese incorporated therein. The solid solution is present as crystals growing on the crystal surface of said nickel hydroxide active material and/or crystals independent of crystals of the nickel hydroxide active material. The content of manganese in the solid solution is at least one mole percent on the whole metal ions in the solid solution and not higher than 10 mole percent on the combined total amount of the metal ions in the nickel hydroxide active material and the solid solution. The positive electrode for an alkaline storage battery contains the above-mentioned active material and a compound of at least one element selected from the group consisting of Ca, Sr, Ba, Cu, Ag, Cd, Y and Yb.
摘要:
The invention provides a nonaqueous electrolyte secondary battery which employs, as a negative electrode active material, a carbide containing an alkali metal in a charged stage. The carbide used is an ionic bond type carbide, a covalent bond type carbide, or an intermetallic compound type carbide. The ionic bond type carbide is exemplified as Na.sub.2 C.sub.2, K.sub.2 C.sub.2, Cu.sub.2 C.sub.2, VC.sub.2, and the like. The covalent bond type carbide is exemplified as Cr.sub.4 C, and the like. The intermetallic compound type carbide is exemplified as Mn.sub.3 C, Mn.sub.23 C.sub.6, Mn.sub.7 C.sub.3, Fe.sub.2 C, FeC, Ni.sub.3 C, and the like. A highly reliable nonaqueous electrolyte secondary battery with a high energy density and excellent cycle life characteristics can be obtained.
摘要翻译:本发明提供一种非水电解质二次电池,其在带电阶段中使用含有碱金属的碳化物作为负极活性物质。 所使用的碳化物是离子键型碳化物,共价键型碳化物或金属间化合物型碳化物。 离子键型碳化物示例为Na 2 C 2,K 2 C 2,Cu 2 C 2,VC 2等。 共价键式碳化物例如为Cr 4 C等。 作为Mn3C,Mn23C6,Mn7C3,Fe2C,FeC,Ni3C等,可列举出金属间化合物型碳化物。 可以获得具有高能量密度和优异的循环寿命特性的高度可靠的非水电解质二次电池。
摘要:
The present invention provides an improved hydrogen storage alloy of Ti--V--Ni system having a body-centered cubic structure. The alloy is of the general formula Ti.sub.x (V.sub.a Cr.sub.1-a).sub.1-x M.sub.b Ni.sub.c, wherein M represents at least one element of La and Ce or a mischmetal, and wherein 0.5.ltoreq.a.ltoreq.0.95, 0.01.ltoreq.b.ltoreq.0.1, 0.1.ltoreq.c.ltoreq.0.6, and 0.2.ltoreq.x.ltoreq.0.4; or Ti.sub.x V.sub.y M.sub.z Ni.sub.1-x-y-z, wherein M represents at least one element selected from the group consisting of Co, Fe, Cu, and Ag, and wherein 0.2.ltoreq.x.ltoreq.0.4, 0.3.ltoreq.y.ltoreq.0.7, 0.1.ltoreq.z.ltoreq.0.3, and 0.6.ltoreq.x+y+z.ltoreq.0.95.
摘要翻译:本发明提供了具有体心立方结构的Ti-V-Ni体系的改进的储氢合金。 该合金具有通式Tix(VaCr1-a)1-xMbNic,其中M表示La和Ce中的至少一种元素或混合稀土金属,并且其中0.5≤a≤0.95,0.01≤b< /=0.1,0.1≤n≤0.6,0.2≤x≤0.4; 或TixVyMzNi1-xyz,其中M表示选自Co,Fe,Cu和Ag中的至少一种元素,其中0.2≤x≤0.4,0.3≤y≤0.7,0.1 = z = 0.3,而0.6 x + y + z <= 0.95。