PROBLEM TO BE SOLVED: To provide sufficient electric conductivity for a fuel electrode of using a cermet of nickel oxide and zirconia, when operating a solid oxide fuel cell. SOLUTION: First of all, the fuel electrode is put in an atmosphere of the atmosphere or inert gas, by starting supply of the atmosphere or the inert gas to the fuel electrode for constituting the solid oxide fuel cell in a cell starting stage of the initial state of power generation (Step S101). Next, a temperature rise in the fuel electrode (the solid oxide fuel cell) put in an atmosphere of the atmosphere or the inert gas is started (Step S102). After the fuel electrode (the solid oxide fuel cell) reaches the reduction temperature by this heating temperature rise (Step S103), supply of the atmosphere or the inert gas to the fuel electrode is stopped (Step S104). Afterwards, reduction processing of the fuel electrode is performed by supplying fuel gas to the fuel electrode in a state of the reduction temperature. COPYRIGHT: (C)2010,JPO&INPIT

Operation method of solid oxide fuel cell

The present invention provides a positive electrode active material prepared using a preparation method including mixing a precursor of a metal for a positive electrode active material with a nanosol of a ceramic-based ion conductor to adsorb the nanosol of the ceramic-based ion conductor on the precursor surface, and mixing the nanosol of the ceramic-based ion conductor-adsorbed precursor with a lithium raw material, and heat treating the resultant to prepare a positive electrode active material, and thereby having greatly increased structural stability by the lithium complex metal oxide present on the surface as a metal element forming the ceramic-based ion conductor being uniformly doped, and as a result, capable of significantly enhancing capacity, a rate property and a cycle property of a battery, a method for preparing the same, and a lithium secondary battery including the same.

Positive electrode active material, method for preparing the same and lithium secondary battery including the same

PROBLEM TO BE SOLVED: To provide a solid oxide fuel cell enabling high output and preventing breakage to achieve high long-term reliability, and to provide a method for manufacturing the same.SOLUTION: The solid oxide fuel cell comprises: a solid electrolyte layer 11 with oxygen ion conductivity; a fuel electrode 12 formed on one principal surface of the solid electrolyte layer and containing porous sintered bodies 121 comprising a first oxide material 121A composed of a titanate-based perovskite oxide with SrTiOas the main ingredient and having electron conductivity, and a second oxide material 121B composed of at least one kind of stabilized ZrOselected from the group consisting of YO, ScO, and YbOand having ion conductivity, and an oxide film 122 which supports dispersed metal particles 123 formed on at least one part of the surface of the porous sintered bodies; and an air electrode formed on the other principal surface of the solid electrolyte layer.

Solid oxide fuel cell and method for manufacturing the same

Disclosed are methods of producing Ni/YSZ porous anode bodies for solid oxide fuel cells. According to the methods, a small amount of a nickel compound or salt is used as a pore former. Upon heating in air, the nickel compound or salt is decomposed into nickel oxide and releases gases, resulting in volume shrinkage. Therefore, Ni/YSZ porous bodies having a uniform pore size and reduction products thereof can be produced in an economical manner.

Methods of producing anodes for solid oxide fuel cells

本発明では、正極活物質用金属の前駆体をセラミック系イオン伝導体のナノゾルと混合し、前記前駆体の表面にセラミック系イオン伝導体のナノゾルを吸着させる段階、及び前記セラミック系イオン伝導体のナノゾルが吸着された前駆体をリチウム原料物質と混合したあと熱処理し、リチウム複合金属酸化物粒子を含み、前記リチウム複合金属酸化物粒子の表面側に存在するリチウム複合金属酸化物が前記セラミック系イオン伝導体の金属元素でドープされた正極活物質を製造する段階を含む製造方法によって製造され、セラミック系イオン伝導体を構成する金属元素で表面に存在するリチウム複合金属酸化物が均一にドープされることにより、構造的安定性が大幅に増加し、その結果として、電池の容量、率特性及びサイクル特性を大幅に改善させることができるようにすることにより、正極活物質、この製造方法、及びこれを含むリチウム二次電池が提供される。

正極活物質、この製造方法、及びこれを含むリチウム二次電池

PROBLEM TO BE SOLVED: To provide a method for producing a nickel composite oxide having nickel being fine and dispersed homogeneously at the time of power generation and the like SOLUTION: In the method for producing the nickel composite oxide whose general formula is denoted as Ni 1-x A x O y (wherein, A is at least an element selected from the group consisting of Be, Mg, Ca, Sr, Ba, Mn, La, Pr, Sm, Gd, Sc, Y, Ti, Zr and Ce; x is 003-013; and y is 098-126), a nickel composite hydroxide whose general formula is denoted as Ni 1-x A x (OH) 2y (wherein, A, x and y are same as defined above) is deposited in an aqueous solution where a nickel salt and the salt of A are dissolved by continuously supplying the nickel salt and the salt of A while the concentrations of nickel ions and A ions are kept constant respectively in the aqueous solution and is heat-treated COPYRIGHT: (C)2010,JPO&INPIT

Method for producing nickel composite oxide, nickel composite oxide obtained by the method, nickel oxide-stabilized zirconia composite oxide using the nickel composite oxide and fuel electrode for solid oxide fuel cell containing the nickel oxide-stabilized zirconia composite oxide

The present invention relates to a nickel oxide-stabilized zirconia composite in which nickel oxide is dispersed uniformly, a process for readily producing the composite oxide, and an anode for a solid oxide fuel cell having excellent output characteristics. More specifically, the present invention provides a nickel oxide-stabilized zirconia composite that is produced by sintering a mixture of nickel hydroxide and/or nickel carbonate and a hydroxide of stabilized zirconium.

Nickel oxide-stabilized zirconia composite oxide, process for production thereof, and anode for solid oxide type fuel cell comprising the composite oxide

Process for production of nickel oxide-stabilized zirconia composite oxide

***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***Nickel oxide-stabilized zirconia composite oxide, process for production thereof, and anode for solid oxide type fuel cell comprising the composite oxide

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Method for producing nickel composite oxide, nickel composite oxide obtained by the method, nickel oxide-stabilized zirconia composite oxide using the nickel composite oxide and fuel electrode for solid oxide fuel cell containing the nickel oxide-stabilized zirconia composite oxide

Nickel oxide-stabilized zirconia composite oxide, process for production thereof, and anode for solid oxide type fuel cell comprising the composite oxide

Process for production of nickel oxide-stabilized zirconia composite oxide

WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LISTNickel oxide-stabilized zirconia composite oxide, process for production thereof, and anode for solid oxide type fuel cell comprising the composite oxide