摘要:
The present invention relates to a hydrogen storage alloy electrode composed of a hydrogen storage alloy having a CaCu5 region and a Ce2Ni7 region in the crystal structure and satisfies the relational formula: p:q=1:(4+a), where p is the sum of the mole fraction of an element occupying the Ca site of the CaCu5 region and the mole fraction of an element occupying the Ce site of the Ce2Ni7 region, q is the sum of the mole fraction of an element occupying the Cu site of the CaCu5 region and the mole fraction of an element occupying the Ni site of the Ce2Ni7 region, and −0.2≦a≦0.4. Accordingly, although the hydrogen storage alloy electrode contains a little or no Co, it is possible to obtain an electrode having little deterioration due to pulverization of the alloy and a high capacity.
摘要:
A battery has elements for electromotive-force accommodated in a metal outer can which has a bottom having a cylindrical, prismatic or similar shape. The ratio of the bottom thickness (TA) the side thickness (TB) is 1.5-7.0. The metal outer can contains primarily iron and a layer of nickel is provided on at least the inner face of the battery. Shallow grooves are formed on the nickel layer perpendicular to the bottom face. An iron-based metallic sheet formed with a nickel layer on at least one face is subjected to drawing forming into a tubular shape having a bottom, continuous ironing processing being performed such that the side of the can formed in the tubular shape has an ironing ratio in the range of 20% to 90% and a metal outer can is thereby manufactured having a ratio of a bottom thickness to its side thickness from 1.5 to 7.0, having a cylindrical shape, prismatic shape or shape similar thereto, and with shallow longitudinal grooves formed in a nickel layer provided on the battery inside face.
摘要:
A battery accommodates elements for electromotive-force within a metal case. This metal case is a metal case having a bottom wherein the bottom thickness/side thickness ratio has a value of 1.2-4.0 and has a cylindrical, prismatic or similar shape. The metal case is constructed of a metal material whose chief constituent is aluminum. Furthermore, it is desirable that a multiplicity of shallow grooves perpendicular to a bottom face are formed in at least a battery inside face of the metal case and moreover that a nickel layer is provided on the battery inside face. The metal case is made by DI processing involving drawing and ironing, to have a value of bottom thickness/side thickness ratio which was hitherto unavailable,i.e., 1.2-4.0 can be obtained.
摘要:
A hydrogen storage alloy electrode comprising a hydrogen storage alloy having a major phase of C15 (MgCu.sub.2) type Laves phase with a composition expressed as ZrMn.sub.w M.sub.x Cr.sub.y Ni.sub.z (where M is one or more elements selected from V and Mo), or its hydride. In this formula, one composition range is 0.6.ltoreq.w.ltoreq.0.8, 0.1.ltoreq.x.ltoreq.0.3, 0
摘要:
A non-aqueous electrolyte secondary battery comprising: a positive electrode plate including an outer jacket comprising a sheet-shaped positive electrode current collector and a positive electrode active material layer formed on an inner surface of the outer jacket except for a peripheral portion thereof; a negative electrode plate including an outer jacket comprising a sheet-shaped negative electrode current collector and a negative electrode active material layer formed on an inner surface of the outer jacket except for a peripheral portion thereof; a separator layer comprising a polymer electrolyte interposed between the positive electrode active material layer and the negative electrode active material layer, wherein the peripheral portion of the positive electrode current collector and the peripheral portion of the negative electrode current collector are bonded together, with an insulating material interposed therebetween.
摘要:
A nickel positive electrode including an active material mixture mainly composed of a nickel oxide and an electrically conductive support, a metal and/or an oxide thereof including elements effective for increasing oxygen overvoltage, preferably at least one element selected from Ca, Ti, Nb, Cr, Y and Yb is contained in a conducting agent such as metallic Co and/or Co oxide added to supplement the electrical conductivity of the active material. By virtue of this construction, the decrease of charging efficiency caused by increase of battery temperature and decrease of the oxygen overvoltage with charging of the battery can be inhibited and the charging efficiency can be improved in a wide temperature atmosphere. Thus, a nickel-metal hydride storage battery of high capacity can be provided.
摘要:
A jar can for a secondary battery is formed by deep-drawing a clad material prepared by bonding an aluminum sheet and an iron sheet to each other. A nickel layer is formed between the iron sheet and the aluminum sheet. Another nickel layer is formed on another surface of the iron sheet. Thus, a lightweight jar can for a secondary battery having high rigidity is obtained.
摘要:
A nickel-metal hydride storage battery having a high capacity and excellent cycle life is disclosed. The battery employs, as its material for the negative electrode, a hydrogen storage alloy powder having a composition represented by the general formula Zr.sub.1-x M3.sub.x Mn.sub.a Mo.sub.b Cr.sub.c M1.sub.d M2.sub.e Ni.sub.f, where M1 represents at least one element selected from the group consisting of V, Nb and rare earth elements, M2 represents at least one element selected from the group consisting of Fe, Co and Cu, and M3 represents at least one element selected from the group consisting of Ti and Hf, and where 0.ltoreq.x.ltoreq.0.3, 0.3.ltoreq.a.ltoreq.0.7, 0.01.ltoreq.b.ltoreq.0.2, 0.05.ltoreq.c.ltoreq.0.3, 0.ltoreq.d.ltoreq.0.1, 0.ltoreq.e.ltoreq.0.2, 0.8.ltoreq.f.ltoreq.1.3, and 1.6.ltoreq.a+b+c+d+e+f.ltoreq.2.2, and wherein said hydrogen storage alloy has at least one of a Laves phase having a crystal structure of the MgCu.sub.2 -type (C15) and a Laves phase having a crystal structure of the MgZn.sub.2 -type (C14), and wherein a sum of integrated intensities of diffraction peaks other than those attributed to the presence of said Laves phase is not more than 5% of a sum of integrated intensities of all diffraction peaks in a diffraction angle 2.theta. of 10.degree. to 80.degree. in a powder X-ray diffraction pattern by Cu K.alpha. radiation.
摘要翻译:公开了一种具有高容量和优异的循环寿命的镍氢蓄电池。 作为负极材料,电池使用具有通式Zr1-xM3xMnaMobCrcM1dM2eNif表示的组成的储氢合金粉末,其中M1表示选自V,Nb和稀土元素中的至少一种元素, M2表示选自Fe,Co和Cu中的至少一种元素,M3表示选自Ti和Hf中的至少一种元素,并且其中0≤x≤0.3,0.3, = a = 0.7,0.01 = b = 0.2,0.05 = c = 0.3,0 / d = 0.1,0 u> = 0.2,0.8, = f = 1.3和1.6 a + b + c + d + e + f = 2.2,其中所述储氢合金具有至少一个具有MgCu2- 类型(C15)和具有MgZn2型(C14)的晶体结构的Laves相,并且其中除了存在所述Laves相之外的衍射峰的积分强度之和不大于 所有diffrac的综合强度之和 通过CuKα辐射,粉末X射线衍射图中衍射角2θ为10°至80°的峰。
摘要:
A method for producing a hydrogen storage alloy electrode comprising the step of treating a hydrogen storage alloy by immersing it in an alkaline solution containing cobalt ion or copper ion at a high temperature at a stage wherein the alloy is in powder state before formed into an electrode and/or at a stage wherein the alloy has been formed into an electrode. By this treatment, a hydrogen storage alloy electrode having an excellent high-rate discharge performance at a low temperature is obtained.
摘要:
The present invention provides a method of producing a hydrogen storage alloy low in cobalt content which can restrains a decrease in cycle life characteristic and preservation characteristic of an alkaline storage battery when the alloy is used as a negative electrode. The method includes the following steps. An Mm-Ni system hydrogen storage alloy which has a crystal structure of CaCu.sub.5 and contains 15 atom % or less of cobalt is powdered to have an average particle diameter of 10-100 .mu.m. Then, the powdered alloy is immersed in a treatment solution at 80.degree.-130.degree. C., the treatment solution comprising an alkaline aqueous solution containing 10 g/l or more of lithium hydroxide and having a specific gravity of 1.1 or higher, and cobalt ions which is contained in the alkaline aqueous solution, thereby forming a layer containing nickel and cobalt in higher concentration than in the bulk of the powdered alloy onto the alloy surface.