摘要:
Positive electrode active materials are formed with various metal oxide coatings. Excellent results have been obtained with the coatings on lithium rich metal oxide active materials. Surprisingly improved results are obtained with metal oxide coatings with lower amounts of coating material. High specific capacity results are obtained even at higher discharge rates.
摘要:
Es wird die Herstellung von feinteiligen, alkalimetallhaltigen Metalloxidpulvern beschrieben, welche wenigstens ein Alkalimetall und wenigstens ein weiteres Metall aus der Gruppe der Übergangsmetalle, der übrigen Hauptgruppenmetalle, der Lanthaniden und Actiniden enthalten. Vorläuferverbindungen dieser Komponenten werden in fester Form oder in Form einer Lösung oder einer Suspension in einen Pulsationsreaktor mit einer aus einer flammenlosen Verbrennung resultierenden Gasströmung eingebracht und teilweise oder vollständig zum gewünschten mehrkomponentigen Metalloxidpulver umgesetzt.
摘要:
Stabilized lithiated manganese oxide (LMO) is prepared by reacting cubic spinel lithium manganese oxide particles and particles of an alkali metal compound in air for a time and at a temperature sufficient to decompose at least a portion of the alkali metal compound, providing a treated lithium manganese oxide. The reaction product is characterized as particles having a core or bulk structure of cubic spinel lithium manganese oxide and a surface region which is enriched in Mn +4 relative to the bulk. Electrochemical cells containing the stabilized LMO of the invention have improved charging and discharging characteristics and maintain integrity over a prolonged life cycle.
摘要:
The invention provides a cathode material for Ll-ion batteries. The material has the formula of 0.5Li2Mn03-0.5LiMn0.5Ni0.35Co0.1502. The material was synthesized using the "self-ignition combustion" method, which previously has not been used for the preparation of Li-rich layered metal oxides. The cathode material exhibits capacities of 290, 250, and 200 mAh/g at discharge rates of C/20, C/4 and C rates, respectively. Moreover, the new material exhibits high rate cycling ability with little or no capacity fade for over 100 cycles demonstrated at a series of rates from C/20 to 2C rates for electrodes loadings of 7-8 mg/cm2.
摘要:
一种双掺杂富锂固溶体正极复合材料,其化学式为xLi 2 MnO 3 ·(1-x)LiM0 2 ·yM a M b ,其中0<x<1,0<y<0.1,M为Ni、Co、Mn、Ti、Al、Zr、Fe、V、Mg和W中——种或几种的组合,Ma为Na和K中的——种或组合,M b 为F、N和P中的一种或几种的组合,该双掺杂富锂固溶体正极复合材料解决了现有技术中富锂固溶体正极材料在循环过程中因结构坍陷导致的电压平台下降的问题。还提供了该正极复合材料的制备方法、包含该正极复合材料的锂离子电池正极片以及包含该锂离子电池正极片的锂离子电池。
摘要:
A process for preparing a metal oxide-containing powder that comprises conducting spray pyrolysis that comprises aerosolizing a slurry that comprises solidphase particles in a liquid that comprises at least one precursor compound, which comprises one or more metallic elements of at least one metal oxide, to form droplets of said slurry, and calcining the droplets to at least partially decompose the at least one precursor compound and form the metal oxide-containing powder having a non-hollow morphology.
摘要:
본 발명은 이종 금속이 치환된 리튬-망간 산화물을 포함하는 리튬 이차 전지용 양극 재료 및 공침법을 이용한 상기 양극 재료의 제조 방법에 관한 것이다. 본 발명에 따른 양극 재료는 보다 향상된 충・방전 용량과 우수한 사이클 특성을 갖는 리튬 이차 전지의 제공을 가능케 한다.
摘要:
公开了一种富锂正极材料、锂电池正极和锂电池,该富锂正极材料的结构通式如下:z[xLi 2 MO 3 ⋅(1-x)LiMeO 2 ]⋅(1-z)Li 3—2y M' y PO 4 ;其中,0<x<1,0<y<1,0<z<1;M为Mn、Ti、Zr、Cr中的至少一种,Me为Mn、Co、Ni、Ti、Cr、V、Fe、Al、Mg、Zr中的至少一种,M'为Fe、Co、Ni、V、Mg、Mn中的至少一种。该锂电池正极和锂电池中均含有该富锂正极材料,该富锂正极材料高电压承受能力强,首次充放电效率高和安全,从而使得锂电池具有优异的能量密度、充放电容量、循环寿命和倍率性能。
摘要:
L'invention concerne un dispositif de traitement thermique pour matériau en poudre, comprenant un four de traitement thermique (2) présentant une zone de chauffe, et un bac de trempe (3). Le bac de trempe (3) comporte un récipient (10) au moins partiellement rempli d'une pluralité d'éléments solides préalablement refroidis, et le four de traitement thermique est monté de manière mobile afin de permettre de transférer le contenu du four de traitement thermique (2) vers le bac de trempe (3). L'invention concerne également le procédé de traitement thermique correspondant, et l'application du procédé à la fabrication d'oxyde de lithium manganèse nickel magnésium lamellaire.