摘要:
A disordered electrochemical hydrogen storage alloy and electrochemical cells having a negative electrode comprising this alloy, where the alloy has the composition(Base Alloy).sub.a Co.sub.b Mn.sub.c Al.sub.d Fe.sub.e La.sub.f Mo.sub.gwhere Base Alloy represents a disordered multicomponent alloy having at least one structure selected from the group consisting of: amorphous; microcrystalline; polycrystalline, lacking long-range compositional order with three or more phases of said polycrystalline structure; and any combination of these structures; b is 0 to 7.5 atomic percent; c is 0.1 to 8.5 atomic percent; d is 0 to 2.5 atomic percent; e is 0.1 to 6.5 atomic percent; f is 0 to 4.5 atomic percent; g is 0 to 6.5 atomic percent; b+c+d+e+f+g>0; and a+b+c+d+e+f+g=100 atomic percent.
摘要翻译:无序的电化学储氢合金和具有包含该合金的负极的电化学电池,其中合金具有组成(基础合金)aCobMncAldFeeLafMog,其中基础合金表示具有选自以下的至少一种结构的无序多组分合金:无定形; 微晶; 多晶,缺乏具有所述多晶结构的三个或多个相的远程组成顺序; 和这些结构的任何组合; b为0〜7.5原子%; c为0.1〜8.5原子% d为0〜2.5原子% e为0.1〜6.5原子%; f为0〜4.5原子% g为0〜6.5原子% b + c + d + e + f + g> 0; 和a + b + c + d + e + f + g = 100原子%。
摘要:
Disclosed is a reversible, electrochemical cell having a high electrochemical activity, hydrogen storage negative electrode. The negative electrode is formed of a reversible, multicomponent, multiphase, electrochemical hydrogen storage alloy. The hydrogen storage alloy is capable of electrochemically charging and discharging hydrogen in alkaline aqueous media. In one preferred exemplification the hydrogen storage alloy is a member of the family of hydrogen storage alloys, dericed from the V-Ti-Zr-Ni and V-Ti-Zr-Ni-Cr alloys in which the V, Ti, Zr, Ni and Cr are partially replaced by one or more modifiers, and the alloy has the composition:(V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a M'.sub.b M".sub.c M.sub.d.sup.ivwhere x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, as a group is from 70 to 100 atomic percent of the alloy, b,c,d,e, . . . , are the coefficients on the modifiers, and M', M", M.sup.iii, and M.sup.iv are modifiers which may be individually or collectively up to 30 atomic percent of the total alloy. The modifiers, M', M", M.sup.iii, and M.sup.iv are chosen from Al, Mn, Mo, Cu, W, Fe, Co, and combinations thereof.
摘要:
The present invention provides novel active materials which reversibly store hydrogen under conditions which make them exceptionally well-suited for elecrochemical applications. These active materials have both novel compositions and structures. A first group of active material compositions incorporate the elements of titanium, vanadium, and nickel. A second group adds zirconium to the first group of active materials. A preferred third composition group adds chromium to the first group of active materials. These materials may be single or multiphase combinations of amorphous, microcrystalline, or polycrystalline structures. Preferably, these materials have a multiphase polycrystalline structure. Methods of reducing the size or of sizing these materials, as well as other hydride-forming alloys, also are provided. Methods of preparing the inventive hydrogen storage materials and fabricating electrodes from these active materials are contemplated. Electrochemical cells and batteries assembled with the inventive electrodes provide significantly improved capacity and cycle life.
摘要:
A process for making a nickel hydroxide material without the necessity of a preamine reactor. The process includes the steps of providing a metal and forming the metal into an active positive electrode material. The process for making a nickel hydroxide material may also include one or more blending steps. The step for forming may include concurrently combining the metal with ammonium ions and hydroxide ions. The step for forming may also include a continuously stirred precipitation reaction of metal ions. In a preferred aspect of the process hereof, the metal may be a secondary nickel source, such as a spent or virgin electrolyte solution from a nickel electrorefining process, nickel electroless plating process or nickel electroplating process.
摘要:
Apparatus for the hydride-dehydride cycling comminution of metal hydride, hydrogen storage alloy materials, which comminuted hydrogen storage alloy material is adapted for use in the negative electrode of hydrogen storage, electrochemical cells.
摘要:
Activated rechargeable hydrogen storage electrodes that are especially suitable for sealed, starved electrochemical cells and methods for making them are provided. The activated electrode includes a body of hydrogen storage active material that is composed of an agglomeration of particles of active hydrogen storage material. The body contains a residual amount of hydrogen and may have a modified surface, the residual amount of hydrogen generally being equivalent to a potential of about -0.7 volts versus a Hg/HgO reference electrode when discharged at a rate of about 5 mA/gram to 25 mA/gram of active material.The method provided for activating a rechargeable hydrogen storage negative electrode includes contacting the electrode with alkaline material for sufficient time at sufficient temperature to alter the surface oxides on the electrode present on the electrodes after fabrication to increase the charge acceptance and electrochemical hydrogen transfer rate and discharging at least a portion of the initial charge present in the electrode. The surface oxides may be treated by several methods, such as by contact with alkaline material or electrochemically.
摘要:
A system for the solid state storage of hydrogen in accordance with several exemplary embodiments is disclosed herein. The system includes a plurality of hydrogen storage containers. Each hydrogen storage container of the plurality of hydrogen storage containers has an inner chamber and an inlet. The inlet provides a pathway for introducing hydrogen gas into the inner chamber. The inner chamber having a solid hydrogen storage medium disposed therein. The system further includes an endplate manifold having a hydrogen receiving port, a plurality of hydrogen outlet ports, and a flow channel. The hydrogen flow channel is integrated into the endplate manifold. Each hydrogen outlet port is in fluid communication with the inlet of one of the plurality of hydrogen storage containers. The hydrogen flow channel provides fluid communication between the hydrogen receiving port and each hydrogen outlet port.
摘要:
A solid state battery including at least one multilayered battery cell comprising: 1) a layer of negative electrode material; 2) a layer of positive electrode material; and 3) a layer of perovskite-type oxide material disposed between the layer of positive electrode material and the layer of negative electrode material, where said layer of perovskite-type oxide material is electrically insulating and capable of readily conducting or transporting protons.
摘要:
A hydrogen storage alloy having the atomic formula AB4.75-5.25. Where A may comprise at least 85 atomic percent Nd and less than 15 atomic percent other rare earth elements and Mg and B may comprise Ni, Co, and at least one element selected from the group consisting of Mn and Al. The atomic percentages of Mn and Al may be governed by the following formulas where Mn and Al are in atomic percent: 1) Mn+1.5 Al≧6 atomic percent; and 2) Mn+Al≦12 atomic percent. The total percent of Mn and Al may provide the alloy with a 20° C. plateau pressure of between 4 and 25 psi, preferably between 6 and 20 psi. The hydrogen storage alloy allows a nickel metal hydride battery into which it is incorporated to maintain a voltage of at least 1.2 V at a depth of discharge of 90%.
摘要:
A preferred embodiment of the present invention provides a process for making nickel sulfate by converting nickel metal into nickel sulfate, which may be converted to nickel hydroxide. Nickel metal is dissolved in sulfuric acid and oxygen containing gas is introduced to produce a nickel sulfate solution having nickel sulfate and water as illustrated in the following chemical equation. Ni+H2SO4+½O2→NiSO4+H2O The nickel sulfate is filtered and sulfuric acid is continually added to maintain stoichiometry within a reactor until the nickel metal is dissolved. The sulfuric acid, oxygen containing gas and nickel metal may be heated to facilitate the desired reaction. Then, the nickel sulfate may be utilized to produce nickel hydroxide.
摘要翻译:本发明的优选实施方案提供了一种通过将镍金属转化成硫酸镍制备硫酸镍的方法,其可以转化为氢氧化镍。 将镍金属溶解在硫酸中,并引入含氧气体以产生具有硫酸镍和水的硫酸镍溶液,如以下化学方程所示。 <?in-line-formula description =“In-line Formulas”end =“lead”?> Ni + H 2 SO 2 4 + 1/2/2 u> 硫酸镍是在线式公式描述=“在线公式”中的结尾=“尾”→硫酸镍是 过滤并连续加入硫酸以保持反应器内的化学计量,直到镍金属溶解。 可以加热硫酸,含氧气体和镍金属以促进所需的反应。 然后,可以使用硫酸镍制造氢氧化镍。