摘要:
A subject for the invention relates to providing a positive active material for lithium ion secondary batteries which attains a high discharge capacity and is excellent in rate characteristics and cycle characteristics. A feature of the invention resides in that a lithium-nickel-manganese composite oxide which has a composition represented by LixNiyMnzO2 wherein x is 1+1/9±(1+1/9)/10, y is 4/9±(4/9)/10, and z is 4/9±(4/9)/10, in particular, represented by the general formula Li[Ni0.5-0.5XMn0.5-0.5XLiX]O2 wherein X satisfies 0.05≦X≦0.11, and has a crystal structure belonging to the monoclinic system and having a space group of C12/ml (No. 12) is used as a positive-electrode material. The lithium-nickel-manganese composite oxide preferably is one in which in X-ray powder diffractometry using a Cu—Kα ray, the peak intensity ratio I(002)/I(13-3) between the (002) plane and the (13-3) plane in terms of Miller indexes hkl on the assumption of belonging to C12/ml (No. 12) of the monoclinic system is 1.35 or higher.
摘要翻译:本发明的主题涉及提供一种获得高放电容量并且具有优异的速率特性和循环特性的锂离子二次电池的正极活性材料。 本发明的特征在于,具有由Li x Mn y Mn z O 2表示的组成的锂镍锰复合氧化物 其中x为1 + 1/9±(1 + 1/9)/ 10,y为4/9±(4/9)/ 10,z为4/9±(4 / 9)/ 10,特别是由通式Li [Ni 0.5-0.5X Mn 0.5-0.5XLi X]表示, 其中X满足0.05 <= X <= 0.11,并且具有属于单斜晶系并且具有C12 / ml(12号)的间隔基团的晶体结构用作正 - 电极材料。 锂镍锰复合氧化物优选使用Cu-Kα射线的X射线粉末衍射法,峰强度比I(002)/ 假设属于单斜晶体的C12 / ml(12号),就米勒指数hk1而言(002)面和(13-3)面之间的(13-3) 系统是1.35以上。
摘要:
A process for preparing monoallylamine represented by the formula (II):CH.sub.2 .dbd.CHCH.sub.2 NH.sub.2 (II)which comprises: catalytically reacting isopropanolamine represented by the formula (I): ##STR1## in a gaseous phase in the presence of a catalyst having dehydrating property. According to the preparation process of the present invention, monoallylamine can be easily obtained in high selectivity and high yield.
摘要:
A process for producing a pyrazine compound of the general formula (3): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent a hydrogen atom or a lower alkyl group, which comprises catalytically reacting in a gaseous phase a diamine compound of the general formula: ##STR2## with a diol compound of the general formula: ##STR3## in the presence of a catalyst containing hydrogen-treated silver or a catalyst containing silver and at least one element selected from the group consisting of alkali metals, alkaline earth metals, zinc and lanthanoid elements.
摘要:
A heteroaromatic nitrile is prepared in a high selectivity and yield by catalytically reacting an alkyl-substituted heteroaromatic compound with molecular oxygen and ammonia in a molar ratio of oxygen to ammonia of not larger than 1.6:1 in a gaseous phase in the presence of a catalyst comprising a vanadium-phosphorus oxide of the formula:VP.sub.x Sb.sub.y O.sub.z (I)wherein x, y and z represent atomic ratios of phosphorus, antimony and oxygen to vanadium, respectively, and x is from 0.1 to 5, y is 0 to 8 and z is defined from the valencies of other elements.
摘要:
A lithium-manganese complex oxide represented by a formula Li[Mn2-X-YLiXMY]O4+&dgr; (wherein M is at least one element selected from the groups IIa, IIIb and VIII of the 3rd and 4th periods, and 0.02≦X≦0.10, 0.05≦Y≦0.30 and −0.2≦&dgr;
摘要:
A method for producing a heterocyclic nitrile in high yield by a gas-phase catalytic reaction of a heterocyclic carboxylic acid or an ester thereof with ammonia in the presence of a catalyst comprising an oxide of at least one element selected from copper and zinc, and an effective method for producing a heterocyclic aldehyde, using the heterocyclic nitrile thus obtained as a starting material, are provided.
摘要:
There is provided a process for preparing a heteroaromatic aldehyde by catalytic reaction of alkyl-substituted heteroaromatic compound with molecular oxygen in a gaseous phase in the presence of a catalyst, which comprises employing an oxide containing vanadium, phosphorus, aluminium and silicon as a catalyst, and diluting a part or all of the oxide present as a catalyst layer in a reactor with a solid inert to the reaction.
摘要:
A method for producing pyridine bases which gives improved yield and comprises reacting in a gas-phase an aliphatic aldehyde, aliphatic ketone or mixture thereof with ammonia in the presence of a zeolite containing titanium and/or cobalt and silicon as zeolite constituent elements in which the atomic ratio of silicon to titanium and/or cobalt is about 5 to about 1000.
摘要:
A heteroaromatic nitrile is prepared in high conversion and yield by catalytically reacting an alkyl-substituted heteroaromatic compound with molecular oxygen and ammonia in the presence of a catalyst having the following composition:Mo(P).sub.x (A).sub.y (B).sub.z (O).sub.w (I)wherein x, y, z and w represent atomic ratios of phosphorus, an element A defined below, an element B defined below and oxygen to molybdenum, respectively and(i) x and z are both 0 (zero), y is from 0.1 to 5, and A is at least one element selected from the group consisting of cerium and tungsten, or(ii) x is from 0.1 to 7, y is from 0 to 5, z is from 0 to 5, A is at least one element selected from the group consisting of cerium, manganese and tungsten, and B is at least one element selected from the group consisting of thallium, titanium, niobium and aluminum, or(iii) x is from 0.5 to 7, y is from 0 to 5, z is from 0.01 to 2. A is at least one element selected from the group consisting of cerium, manganese and tungsten, and B is vanadium,and w is defined from the valencies of molybdenum, phosphorus, the element A, the element B and the values x, y and z.