摘要:
A composite lithiated nickel-based positive electrode material in which the water-containing excess lithium compounds LiOH and LiHCO3 have a combined content of at least 10 times lower than the content of the water-free excess lithium compound Li2CO3. There is further provided a lithium-ion battery comprising the positive electrode material having the significantly reduced amount of LiOH and LiHCO3.
摘要翻译:一种复合锂化镍基正极材料,其中含水过量锂化合物LiOH和LiHCO 3的组合含量比无水过量锂化合物Li 2 CO 3的含量低至少10倍。 还提供了一种锂离子电池,其包含具有显着减少量的LiOH和LiHCO 3的正极材料。
摘要:
A lithium polymer battery having a greater comonomer quantity in the polymer of the negative electrode than in the polymer of the positive electrode. The negative electrode polymer is a copolymer of a first primary monomer and 1-30 wt. % of a first comonomer, and the positive electrode is either a homopolymer of a second primary monomer or a copolymer of the second primary monomer and up to 25 wt. % of a second comonomer.
摘要:
A novel method of preparing a highly homogenous spinel Li.sub.1+X Mn.sub.2-X O.sub.4+Y intercalation compound having a predetermined mean particle size and particle size distribution for 4 V secondary lithium and lithium ion cells is provided. The method comprises mixing at least one manganese compound having a predetermined particle size distribution with at least one lithium compound wherein the manganese compound has a mean particle size of between about 1 and 15 microns and the mean particle size of the lithium compound is less than that of the manganese compound. The mixture is then fired in one or more firing steps within specific temperature ranges to form the Li.sub.1+X Mn.sub.2-X O.sub.4+Y intercalation compound. Preferably, at least one firing step is at a temperature of between about 700.degree. C. and 900.degree. C. The Li.sub.1+X Mn.sub.2-X O.sub.4+Y intercalation compounds may be used in the positive electrodes of secondary lithium and lithium ion cells to provide cells having high specific capacity, cycleability, and charge-discharge rate capability.
摘要:
A novel method of preparing a highly homogenous spinel Li.sub.1+X Mn.sub.2-X O.sub.4+Y intercalation compound having a predetermined mean particle size and particle size distribution for 4 V secondary lithium and lithium ion cells is provided. The method comprises mixing at least one manganese compound having a predetermined particle size distribution with at least one lithium compound wherein the manganese compound has a mean particle size of between about 1 and 15 microns and the mean particle size of the lithium compound is less than that of the manganese compound. The mixture is then fired in one or more firing steps within specific temperature ranges to form the Li.sub.1+X Mn.sub.2-X O.sub.4+Y intercalation compound. Preferably, at least one firing step is at a temperature of between about 700.degree. C. and 900.degree. C. The Li.sub.1+X Mn.sub.2-X O.sub.4+Y intercalation compounds may be used in the positive electrodes of secondary lithium and lithium ion cells to provide cells having high specific capacity, cycleability, and charge-discharge rate capability.
摘要:
A method for preparing a positive electrode material for a lithium-ion or lithium-ion polymer battery to reduce the moisture content of the positive electrode material. A lithiated transition metal oxide positive electrode material having at least one water-containing compound therein is treated to convert the water-containing compound to a water-free compound. One treatment in the method of the present invention involves exposing the positive electrode material at a temperature of 0-650° C. to a CO2-containing gas. The other treatment in the method of the present invention involves heating the positive electrode material to a temperature greater than 250° C. in the presence of an oxygen-containing gas, such as air and/or O2. The treatments may be, performed sequentially or concurrently.
摘要:
A method of preparing a highly homogenous spinel Li1+XMn2−XO4+Y intercalation compound having a predetermined mean particle size and particle size distribution for 4 V secondary lithium and lithium ion cells is provided. The method comprises mixing at least one manganese compound having a predetermined particle size distribution with at least one lithium compound wherein the manganese compound has a mean particle size of between about 1 and 15 microns and the mean particle size of the lithium compound is less than that of the manganese compound The mixture is then fired in one or more firing steps within specific temperature ranges to form the Li1+XMn2−XO4+Y intercalation compound. Preferably, at least one firing step is at a temperature of between about 700° C. and 900° C. The Li1+XMn2−XO4+Y intercalation compounds may be used in the positive electrodes of secondary lithium and lithium ion cells to provide cells having high specific capacity, cycleability, and charge-discharge rate capability.