Lithium ion battery anode material with surface hydrophobicity and preparation method of lithium ion battery anode material
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A lithium-ion battery, cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor cycle performance and storage performance electrolyte compatibility, and achieve improved cycle stability, consistency and reliability. The effect of performance and simple preparation process
Inactive Publication Date: 2017-01-04
HARBIN INST OF TECH
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[0005] The purpose of the present invention is to solve the problems of traditional positive electrode material cycle performance, storage performance and poor compatibility with electrolyte, and provide a lithium ion battery positive electrode material with surface hydrophobicity and its preparation method
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specific Embodiment approach 1
[0033] Specific embodiment 1: The surface of the positive electrode material of the lithium-ion battery with surface hydrophobicity in this embodiment has a layer of organic hydrophobic layer, the thickness of the hydrophobic layer is 0.5nm-20nm, and the mass content of the hydrophobic layer is 0.1%-10%; The positive electrode material is one or a combination of layered structure or spinel structure lithium ion battery positive electrode materials.
specific Embodiment approach 2
[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the organic hydrophobic layer is RSiX 3 , wherein R is one or more of oxygen, mercapto, amino, vinyl, ethoxy, epoxy, amido, methacryloxy, aminopropyl, ureido, isocyanate organic functional groups , X is one or more of hydrolyzable halogen, alkoxy, and acyloxy. Other steps and parameters are the same as those in the first embodiment.
specific Embodiment approach 3
[0035] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the anode material of the layered structure is LiNi x co y mn z m 1‐x‐y‐z o 2 , where 0≤x≤1, 0≤y≤1, 0≤z≤1, M is Zr, Fe, Sm, Pr, Nb, Ga, Zn, Y, Mg, Al, Cr, Ca, Na, Ti, One or more of Cu, K, Sr, Mo, Ba, Ce, Sn, Sb, La, Bi. Other steps and parameters are the same as those in the first embodiment.
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Abstract
The invention discloses a lithium ion battery anode material with surface hydrophobicity and a preparation method of the lithium ion battery anode material, relates to a lithium ion battery anode material prepared according to a surface modification technology and a preparation method thereof, and aims to solve the problems that the conventional anode material is poor in recycling performance, storage performance and compatibility with an electrolyte. The lithium ion battery anode material with the surface hydrophobicity has an organic hydrophobic layer on the surface, wherein the hydrophobic layer has the thickness of 0.5-20nm and the mass content of 0.1-10%; the preparation method of the lithium ion battery anode material with the surface hydrophobicity comprises the following steps: uniformly mixing an organic matter with hydrophobicity and an organic solvent, stirring together with an anode material at 30-80 DEG C, carrying out a reaction to obtain a mixture, filtering the mixture to obtain a solid filter cake, and treating the solid filter cake according to two temperature gradients to obtain the lithium ion battery anode material with the surface hydrophobicity. The lithium ion battery anode material with the surface hydrophobicity, prepared by the preparation method provided by the invention, is applied to a lithium ion battery.
Description
technical field [0001] The invention relates to a lithium ion battery cathode material obtained by surface modification technology and a preparation method thereof. Background technique [0002] Cathode material is an important factor determining the performance of lithium-ion batteries. The energy density, safety, cost and cycle life of lithium-ion batteries are closely related to cathode materials. With the development of lithium-ion battery technology, more stringent requirements have been placed on the performance of cathode materials, such as safety, cost and cycle performance. In the 1980s, American scholar J.B.Goodenough and others first discovered lithium cobalt oxide (LiCoO 2 ) can be used as a positive electrode material for deintercalating lithium ions, and related patents have been applied for. Since then, lithium cobalt oxide has been successfully used as a positive electrode material for commercialized lithium-ion batteries for small electronic products by So...
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