摘要:
Provided is a cathode material for a lithium secondary battery composed of an aggregate of Li-A-O composite oxide particles (wherein A represents one or more metal elements selected from Mn, Fe, Co and Ni), wherein the lithium composite oxide contains 20 to 100 ppm (by mass) of P, and the total content of impurity elements excluding essential components is 2000 ppm or less. Also provided is a manufacturing method of such a cathode material for a lithium secondary battery including the steps of suspending lithium carbonate in water and thereafter introducing a metallic salt solution of one or more metal elements selected from Mn, Fe, Co and Ni in the lithium carbonate suspension, adding a small amount of phosphoric acid so that the P content in the Li-A-O composite oxide particles will be 20 to 100 ppm (by mass), and forming an aggregate of Li-A-O composite oxide particles containing 20 to 100 ppm (by mass) of P by filtering, cleansing, drying and thereafter oxidizing the obtained carbonate. This cathode material for a lithium secondary battery and its manufacturing method realize improved sinterability and battery characteristics.
摘要:
Means for stably supplying a lithium-containing complex oxide exhibiting a high performance as a cathode active material of a lithium secondary cell or the like and having a high tap density. Granular lithium-containing complex oxide such as lithium manganese complex oxide comprises “complex oxide grains produced by integrating lithium-rich material grains abnormally grown during a firing reaction with the surfaces of the base grains by sintering.” The number of complex oxide grains is not more than 50 per gram of the complex grains. Metal oxide such as manganese oxide and lithium carbonate not more than 5 μm in average grain size are mixed by means of a mixer which grinds and mixes particles by using shearing force and heating and firing them at a warming rate of not more than 50° C./h., thus producing the lithium-containing complex oxide.
摘要:
Provided is a cathode material for a lithium secondary battery composed of an aggregate of Li-A-O composite oxide particles (wherein A represents one or more metal elements selected from Mn, Fe, Co and Ni), wherein the lithium composite oxide contains 20 to 100 ppm (by mass) of P, and the total content of impurity elements excluding essential components is 2000 ppm or less. Also provided is a manufacturing method of such a cathode material for a lithium secondary battery including the steps of suspending lithium carbonate in water and thereafter introducing a metallic salt solution of one or more metal elements selected from Mn, Fe, Co and Ni in the lithium carbonate suspension, adding a small amount of phosphoric acid so that the P content in the Li-A-O composite oxide particles will be 20 to 100 ppm (by mass), and forming an aggregate of Li-A-O composite oxide particles containing 20 to 100 ppm (by mass) of P by filtering, cleansing, drying and thereafter oxidizing the obtained carbonate. This cathode material for a lithium secondary battery and its manufacturing method realize improved sinterability and battery characteristics.
摘要:
A lithium-containing complex oxide exhibits a high performance as a cathode active material of a lithium secondary cell or the like and having a high tap density. A granular lithium-containing complex oxide, such as lithium manganese complex oxide, is made up of “complex oxide grains produced by integrating lithium-rich material grains abnormally grown during a firing reaction with the surfaces of the base grains by sintering.” The number of complex oxide grains is not more than 50 per gram of the complex grains. A metal oxide such as manganese oxide and lithium carbonate not more than 5 μm in average grain size are mixed by means of a mixer which grinds and mixes particles by using a shearing force and heated and fired at a warming rate of not more than 50° C./h., thus producing the lithium-containing complex oxide.
摘要:
Stable supply of a cathode material for a lithium secondary battery that exels in sinterbility and composition stability and can exhibit satisfactory battery performance is accomplished by reducing to 100 ppm or less both the contents of Na and S being impurity elements in multiple oxides as materials for a cathode material for a lithium secondary battery and carbonic salts as precursor materials for the production of a cathode material for a lithium secondary battery.
摘要:
A positive plate material for lithium secondary cells stably exhibiting excellent performance including the cell initial capacity, cycle characteristics, and the safety. The material is produced by dripping an aqueous solution of a salt (e.g., cobalt sulfate) of a doping element (e.g., a transition metal, an alkaline metal, an alkaline-earth metal, B, or Al) into an alkaline solution, a carbonate solution, or a hydrogencarbonate solution in any one of which a compound (e.g., manganese oxide) of a metal (Mn, Co, Ni, or the like) which is the major component of the positive plate material so as to precipitate the compound of the doping element on the major component compound and to cover the major component compound, mixing the major component compound covered with the doping element with a lithium compound (e.g., lithium carbonate), and firing the mixture.
摘要:
A feature parameter candidate generation apparatus has a storage unit that stores the values of feature parameters extracted from each of samples, an index value calculation unit that calculates an index value, which is obtained by normalizing the number of the kinds of the values of feature parameters by the number of the samples, for each of the feature parameters, an evaluation object selection unit that selects combinations of feature parameters which are objects to be evaluated, an evaluation unit that evaluates whether the uniformity of a frequency distribution of index values of the individual feature parameters for combinations of feature parameters selected as the objects to be evaluated satisfies a predetermined criterion, and a candidate determination unit that determines, as feature parameter candidates to be given to the model generation device, a combination of feature parameters that is evaluated to satisfy the predetermined criterion.
摘要:
A Zn-Ni alloy having a high Ni content is used for supplying Ni.sup.2+ and Zn.sup.2+ ions into an acidic plating bath and for supplying Ni and Zn into a hot dip galvanizing bath. This alloy is characterized by being produced by using a flux consisting of a fused-salt former, which forms a salt having a melting temperature of 700.degree. C. or less, and Na.sub.2 B.sub.4 O.sub.7 and occasionaly additionally Na.sub.2 CO.sub.3. By using the inventive alloy, the bath can be quickly prepared, and Zn and Ni can be supplied to the bath without leaving the undissolved residue.
摘要翻译:使用具有高Ni含量的Zn-Ni合金将Ni2 +和Zn2 +离子供应到酸性电镀浴中,并将Ni和Zn供应到热浸镀锌浴中。 该合金的特征在于使用由熔融盐形成剂形成的助熔剂,其形成熔融温度为700℃以下的盐和Na 2 B 4 O 7,另外还含有Na 2 CO 3。 通过使用本发明的合金,可以快速制备浴,并且可以将Zn和Ni供应到浴中而不留下未溶解的残余物。