Lithium-ion battery cathode material with multi-component single-core-shell structure and preparation method thereof
A technology of lithium ion battery and positive electrode material is applied in the field of positive electrode material of lithium ion battery and its preparation, which can solve the problems of non-uniformity and unreachable performance indicators, and achieve the effect of improving electrochemical performance and safety.
Active Publication Date: 2019-01-15
ZHEJIANG MEIDARUI NEW MATERIAL TECH CO LTD
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However, this method is only a macroscopic mixture of various substances, which may cause the inhomogeneity of various performance indicators and fail to achieve the desired effect.
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[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0025] Please refer to figure 1 , the embodiment of the present invention provides a lithium-ion battery positive electrode material 100 with a single core-shell structure of multiple components, including a casing 10 and a core 11 arranged in the casing 10, and the core 11 includes at least two different components 111 / 112 / 113 (the structure can be the same or different), the material of each component 111 / 112 / 113 is selected from layered structure positive electrode active materials, spinel structure positive elec...
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Abstract
The invention provides a multi-component and single-core-shell structured positive electrode material of a lithium ion battery. The positive electrode material comprises a shell and a core arranged in the shell, wherein the core comprises at least two kinds of components; the material of each component is selected from one kind of a positive electrode active material with a laminated structure, a positive electrode active material with a spinel structure, and a positive electrode active material with an olivine structure; the material of the shell is selected from at least two kinds of the materials selected from the positive electrode active material with the laminated structure, the positive electrode active material with the spinel structure, and the positive electrode active material with the olivine structure; the positive electrode active material with the laminated structure comprises <x>Li<2>MO<3>.(1-x)LiMO<2>, wherein x is greater than or equal to 0 and less than 1; the positive electrode active material with the spinel structure comprises LiM<2>O<4>; and the positive electrode active material with the olivine structure comprises LiMPO<4>, wherein M is selected from one or more of metal elements with the atomic number of greater than six. The invention also provides a preparation method for the positive electrode material of the lithium ion battery.
Description
technical field [0001] The invention relates to a lithium-ion battery cathode material with a multi-component single core-shell structure and a preparation method thereof. Background technique [0002] Lithium-ion batteries are considered to be the most promising due to their high voltage, high capacity and environmental characteristics, and are therefore widely used in a wide range of fields from notebook computers to electric vehicles. But existing lithium-ion battery technology is not yet able to meet the growing demand for high-performance energy. The energy density, capacity, charge and discharge performance, cycle life, safety performance and cost of lithium batteries are mainly determined by the components (including chemical components and structural components) that make up the battery. The composition of the positive electrode material includes layered materials such as nickel-cobalt lithium manganese oxide, lithium nickel-cobalt aluminate, lithium cobalt oxide, e...
Claims
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IPC IPC(8): H01M4/13H01M4/58H01M4/62
CPCH01M4/13H01M4/5805H01M4/628Y02E60/10
Inventor 刘冬梅韩珽
Owner ZHEJIANG MEIDARUI NEW MATERIAL TECH CO LTD