摘要:
The present invention provides a composite oxide for a high performance solid oxide fuel cell which can be fired at a relatively low temperature, and which has little heterogeneous phases of impurities other than the desired composition. The composite oxide is the one having a perovskite type crystal structure containing rare earth elements, and having constituent elements homogeneously dispersed therein. A homogeneous composite oxide having an abundance ratio of heterogeneous phases of at most 0.3% by average area ratio, and a melting point of at least 1470° C., is obtained by using metal carbonates, oxides or hydroxides, and reacting them with citric acid in an aqueous system.
摘要:
The present invention provides a composite oxide for a high performance solid oxide fuel cell which can be fired at a relatively low temperature, and which has little heterogeneous phases of impurities other than the desired composition. The composite oxide is the one having a perovskite type crystal structure containing rare earth elements, and having constituent elements homogeneously dispersed therein. A homogeneous composite oxide having an abundance ratio of heterogeneous phases of at most 0.3% by average area ratio, and a melting point of at least 1470° C., is obtained by using metal carbonates, oxides or hydroxides, and reacting them with citric acid in an aqueous system.
摘要:
A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1-xMO2-y-&dgr;Fy. The second metallic element or constituent M may be Mn or a combination of Mn and substitute metal such as Co, Ni, Cr, Fe, Al, Ga or In. A lithium deficiency quantity x is in the range of 0
摘要翻译:非水电解质二次电池用正极活性物质至少包含由通式Li 1-x M 2 O-y-δFy表示的含锂锰层状复合氧化物。 第二金属元素或组分M可以是Mn或Mn与Co,Ni,Cr,Fe,Al,Ga或In等的替代金属的组合。 锂缺乏量x在0
摘要:
A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the formula Li1-xAxMnO2, or the formula Li1-xAxMn1-yMyO2. The lithium-containing manganese composite oxide includes a lithium substitute metal A, such as Na, K, Ag, substituting for part of Li. The lithium substitution quantity x may be in the range of 0.03
摘要:
A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1-xMn1-yMyO2-&dgr;. The lithium-containing manganese composite oxide is deficient in lithium with respect to the stoichiometric composition of a layered crystal structure represented by the general formula LiMeO2. Part of Mn is replaced by a substitute metal such as Co, Ni, Fe, Al, Ga, In, V, Nb, Ta, Ti, Zr, Ce or Cr.
摘要翻译:非水电解质二次电池用正极活性物质至少包含由通式Li 1-x Mn 1-y M y O 2-δ表示的含锂锰层状复合氧化物。 相对于由通式LiMeO 2表示的层状结晶结构的化学计量组成,含锂的锰复合氧化物缺乏锂。 部分Mn被Co,Ni,Fe,Al,Ga,In,V,Nb,Ta,Ti,Zr,Ce或Cr等替代金属所取代。
摘要:
A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-deficient manganese layered composite oxide represented by the general formula Li1-xMnO2-&dgr;. A lithium deficiency quantity x is in the range of 0.03
摘要:
A process for producing a lithium-containing composite oxide for a positive electrode active material for use in a lithium secondary battery, the oxide having the formula LipNxMmOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9≦p≦1.2, 0.9≦x
摘要翻译:一种锂二次电池用正极活性物质的含锂复合氧化物的制造方法,其特征在于,具有式LiNiMMOzFa(其中,N为选自Co,Mn,Ni, M是选自Al,碱土金属元素和除N之外的过渡金属元素中的至少一种元素,0.9和nlE; p
摘要:
Coagulated particles of nickel-cobalt-manganese hydroxide wherein primary particles are coagulated to form secondary particles are synthesized by allowing an aqueous solution of a nickel-cobalt-manganese salt, an aqueous solution of an alkali-metal hydroxide, and an ammonium-ion donor to react under specific conditions; and a lithium-nickel-cobalt-manganese-containing composite oxide represented by a general formula, LipNixMn1-x-yCoyO2-qFq (where 0.98≦p≦1.07, 0.3≦x≦0.5, 0.1≦y≦0.38, and 0≦q≦0.05), which is a positive electrode active material for a lithium secondary cell having a wide usable voltage range, a charge-discharge cycle durability, a high capacity and high safety, is obtained by dry-blending coagulated particles of nickel-cobalt-manganese composite oxyhydroxide formed by making an oxidant to act on the coagulated particles with a lithium salt, and firing the mixture in an oxygen-containing atmosphere.
摘要翻译:通过使镍 - 钴 - 锰盐的水溶液,碱金属氢氧化物的水溶液和铵离子给体合成,其中一次粒子凝结形成二次粒子的镍 - 钴 - 氢氧化锰的凝结颗粒合成 在特定条件下反应; 和由以下通式表示的锂镍钴钴锰复合氧化物:Li x Mn x Mn 1-xy Co Co, 其中0.98 <= p <= 1.07,0.3 <= x <= 0.5,0.1 <= y < = 0.38,0 <= q <= 0.05),其是具有宽的可用电压范围,充放电循环耐久性,高容量和高安全性的锂二次电池用正极活性物质 通过使锂化合物通过使氧化剂作用于凝固的颗粒而形成的镍 - 钴 - 锰复合羟基氧化物的混合的混合颗粒,并在含氧气氛中烧结该混合物。
摘要:
To provide a process for producing a lithium-cobalt composite oxide for a positive electrode of a lithium secondary battery, which has a large volume capacity density, high safety, high charge and discharge cycle durability, high press density and high productivity. A process for producing a lithium-cobalt composite oxide represented by the formula LipCoxMyOzFa (wherein M is a transition metal element other than Co, or an alkaline earth metal element, O.9≦p≦1.1, 0.980≦x≦1.000, 0≦y≦0.02, 1.9≦z≦2.1, x+y=1, and 0≦a≦0.02), characterized in that as a cobalt source, a mixture is used which comprises cobalt hydroxide in the form of substantially spherical secondary particles with an average particle size of from 8 to 20 μm formed by agglomeration of primary particles and tricobalt tetroxide in the form of secondary particles with an average particle size of from 2 to 10 μm formed by agglomeration of primary particles, in a cobalt atomic ratio of from 5:1 to 1:5, and firing is carried out at from 700 to 1,050° C.
摘要翻译:为了提供具有大容量密度,高安全性,高充放电循环耐久性,高压力密度和高生产率的锂二次电池正极用锂钴复合氧化物的制造方法。 一种由下式表示的锂 - 钴复合氧化物的制备方法:其中R 1,R 2,R 2, (其中M是除Co以外的过渡金属元素或碱土金属元素,O.9 <= p <= 1.1,0.980 <= x <=1.000,0≤y <= 0.02,1.9 <= z <= 2.1,x + y = 1,0 <= a <= 0.02),其特征在于,作为钴源,使用包含基本上为球形的氢氧化钴的混合物 平均粒度为8〜20μm的二次粒子是通过一次粒子和四氧化四铁的结合而形成的,该二次粒子是以原子粒子聚集形成的平均粒径为2〜10μm的二次粒子,以钴原子 比例为5:1至1:5,焙烧时间为700至1050℃。
摘要:
The present invention provides a lithium-transition metal composite oxide having a large volume capacity density, high safety, excellent coating uniformity, excellent charge/discharge cycle durability and excellent low temperature characteristics, and suitable as a positive electrode active material for a lithium secondary cell.A lithium-transition metal composite oxide which is represented by the formula LixM1−yNyO2 (wherein 0.2≦x≦1.2, 0≦y≦0.7, M is a transition metal element, and N is a transition metal element other than M or an alkaline earth metal element), wherein in the distribution curve of the cumulative volume particle size of said lithium composite oxide, the inclination of the curve at a cumulative volume fraction of 20% and 80% are at most 9%/μm and at least 3%/μm, respectively, and the average particle size is from 3 to 20 μm.