Abstract:
A cathode active material comprising a mixed crystal is provided. The mixed crystal have a first crystalline substance having one or more members with general formulas Li xx M yy (XO 4 ) zz , LiMXO 5 , LiMXO 6 and LiMX 2 O 7 , and a second crystalline substance having one or more members with general formulas LiD c O 2 , Li i Ni 1-d-e Co d Mn e O 2 , LiNi 1-f-g Co f Al g O 2 , Li x Ni 1-y CoO 2 and Li m Mn 2-n E n O j . The resulting mixed metal crystal can exhibit superior electrical property and is a better cathode material for lithium secondary batteries. Further, a lithium ion secondary battery and a rechargeable battery with a cathode comprising the same are provided.
Abstract:
A method of preparing a cathode active material having a mixed crystal is provided. The method comprises the following steps: providing a first crystalline substance having one or more members with general formulas Li xx M yy (XO 4 ) zz , LiMXO 5 , LiMXO 6 and LiMX 2 O 7 ; providing a second crystalline substance having one or more members with general formulas LiD c O 2 , Li i Ni 1-d-e Co d Mn e O 2 , LiNi 1-f-g Co f Al g O 2 , Li x Ni 1-y CoO 2 and Li m Mn 2-n E n O j and sintering the two crystalline substances to provide the mixed crystal. According to the cathode active material prepared by the method, the electrical property is superior, which enhances the duration and performance of a lithium secondary battery. Further, a method of forming a lithium ion secondary battery comprising the same is provided.
Abstract:
A method of preparing a cathode active material comprising a mixed crystal is provided. The method comprises the following steps: (1) providing a first crystalline substance having one or more members with general formulas Li x M’ y (XO 4 ) z , LiM’ X O 5 , LiM’XO 6 and LiM’X 2 O 7 ; (2) providing a second crystalline substance having one or more members with a general formula A a M b N c O d ; and sintering the two crystalline substances to provide the mixed crystal. Further, a method of preparing a lithium secondary battery is provided. According to the cathode active material prepared by the method, the electrical property is superior, which enhances the duration and performance of a lithium secondary battery.
Abstract:
Disclosed herein is a method for preparing lithium iron phosphate as positive electrode active material for lithium ion secondary battery, comprising sintering a mixture containing a lithium source, an bivalent iron source, a phosphorus source, and a carbon source in an inert atmosphere, and cooling the sintered product; wherein during the sintering process, the inert atmosphere is static, and has a normal pressure. The lithium iron phosphate prepared by the present invention is free of Fe2P impurity, and the prepared battery prepared therefrom has high capacity, low internal resistance, and good cycle performance.
Abstract:
A composite lithium compound having a mixed crystalline structure, the mixed crystal has a first crystalline substance having one or more members with following general formulas Li x M’ y (XO 4 ) z , LiM’ XO 5 , LiM’XO 6 , and LiM’X 2 O 7 , in which M’ is an element selected from a group consisting of Na, Mn, Fe, Co, Ni, Ti, V, Y, Mg, Ca, Nb and Zn; the X is an element selected from a group consisting of P, S, As, Mo and W; and a second crystalline substance having one or more members with a general formula of A a M b N c O d . Further, a lithium ion secondary battery and a rechargeable battery with a cathode comprising the same are provided.
Abstract translation:具有混合晶体结构的复合锂化合物,所述混晶具有具有一个或多个具有以下通式LixM'y(XO4)z,LiM'XO5,LiM'XO6和LiM'X2O7的成员的第一结晶物质,其中 M'是选自Na,Mn,Fe,Co,Ni,Ti,V,Y,Mg,Ca,Nb和Zn中的一种元素; X是选自由P,S,As,Mo和W组成的组的元素; 和具有一个或多个具有通式A a M b N c O d的成员的第二结晶物质。 此外,提供锂离子二次电池和具有包含该锂离子二次电池的阴极的可再充电电池。
Abstract:
The present invention relates to color and flavor improvements in iron and zinc supplemented dry beverage powders having fruit and/or botanical flavor. Vitamins such as the B vitamins, vitamin A, vitamin C, and vitamin E can be added to the dry beverage mix. The supplemented dry beverage mix can also contain iodine, niacin and folic acid. In particular, methods for fortifying dry beverage mixes with certain bioavailable zinc and iron compounds without producing reconstituted beverages having undesirable color or flavor are disclosed. Also disclosed are beverages and foods fortified preferably with amino acid chelated iron that do not impart objectionable color due to the inclusion of a ferric ion reducing agent such as ascorbic acid and/or an agent such as citric acid that is capable of preferentially complexing ferric ion in the presence of polyphenols or flavonoids that are typically present in these beverages or foods.