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Preparation method of lithium ion battery anode material with high multiplying power

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems that are not conducive to large-scale industrial production, complex and changeable processes, and excessive energy consumption, and achieve considerable reversible capacity, reversible Good controllability and stable cycle life

Inactive Publication Date: 2012-02-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The first two methods have the disadvantages of complex and changeable process, excessive energy consumption, and high cost, which are not conducive to the realization of large-scale industrial production

Method used

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  • Preparation method of lithium ion battery anode material with high multiplying power
  • Preparation method of lithium ion battery anode material with high multiplying power
  • Preparation method of lithium ion battery anode material with high multiplying power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Mix 0.205 mol of lithium hydroxide, 0.285 mol of manganese dioxide, 0.105 mol of nickelous oxide and 0.005 mol of niobium pentoxide, and then put them into a ball mill for ball milling for 8 h to make them evenly mixed, and then the final mixture Put it in a muffle furnace, raise it from room temperature to 850 °C at a rate of 5 °C / min, then react at 850 °C for 24 h, and then naturally cool to room temperature to obtain LiMn 1.425 Ni 0.525 Nb 0.05 o 4 . X-ray powder diffraction analysis indicated that the resulting LiMn 1.425 Ni 0.525 Nb 0.05 o 4 It is a pure phase, without any other impurity phase, and has high crystallinity. According to scanning electron microscope analysis, the particle size of the obtained product is uniform, and the particle size is 1-2 μm. The resulting product was used as an electrode material, and was assembled into an experimental button-type lithium-ion battery in a glove box filled with argon gas, with 0.1 C The charge cy...

Embodiment 2

[0020] Example 2: Mix 0.22 mol lithium nitrate, 0.285 mol manganese acetate, 0.105 mol nickel nitrate and 0.005 mol niobium pentoxide, and then put them into a ball mill for 5 h to make them evenly mixed, and then put the final mixture into a horse In a Furnace, rise from room temperature to 850 °C at a rate of 8 °C / min, react at 850 °C for 24 h, and then naturally cool to room temperature to obtain LiMn 1.425 Ni 0.525 Nb 0.05 o 4 . X-ray powder diffraction analysis indicated that the resulting LiMn 1.425 Ni 0.525 Nb 0.05 o 4 No impurities. According to scanning electron microscope analysis, the particle size of the obtained product is uniform and consistent, and the particle size is 3-4 μm. The resulting product was used as an electrode material, and was assembled into an experimental button-type lithium-ion battery in an argon-filled glove box at 0.1 C The charge cycle is performed at a rate of 3.3-4.95 V, and then the discharge cycle is performed at a rate of 3C, L...

Embodiment 3

[0021] Example 3: Mix 0.21 mol of lithium acetate, 0.285 mol of manganese nitrate, 0.105 mol of nickel acetate, and 0.01 mol of niobium hydroxide, and then put them into a ball mill for 10 h to make them evenly mixed, and then put the final mixture into a muffle In the furnace, rise from room temperature to 950 °C at a rate of 10 °C / min, react at 950 °C for 15 h, and then naturally cool to room temperature, that is, LiMn 1.425 Ni 0.525 Nb 0.05 o 4. X-ray powder diffraction analysis indicated that the resulting LiMn 1.425 Ni 0.525 Nb 0.05 o 4 No impurities. According to scanning electron microscope analysis, the particle size of the obtained product is uniform, and the particle size is 2-5 μm. The resulting product was used as an electrode material, and was assembled into an experimental button-type lithium-ion battery in a glove box filled with argon gas, with 0.1 C The charge cycle is performed at a rate of 3.3-4.95 V, and then the discharge cycle is performed at a r...

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Abstract

The invention provides a preparation method of a lithium ion battery anode material with high multiplying power, belonging to the technical field of lithium ion batteries. The preparation method comprises the following steps of: mixing a lithium source, a manganese source, a nickel source and a niobium source according to a certain stoichiometric ratio, grinding for 5-10h in a ball mill to obtain a mixture, putting the mixture into a muffle furnace, heating to 850-950 DEG C at a temperature rise speed of 5-10DEG C / min, reacting for 15-24h at 850-950 DEG C, and then naturally cooling to room temperature to obtain an LiMn1.425Ni0.525Nb0.05O4 anode material. The anode prepared by the preparation method disclosed by the invention has considerable reversible volume, excellent multiplying power and stably cycle life, thereby having higher actual usage value and being capable of effectively meeting actual requirements of various applications of lithium ion batteries. In addition, the preparation method disclosed by the invention has the characteristics of simplified preparation process, high controllable repeatability, low production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a lithium ion battery LiMn with high rate performance 1.425 Ni 0.525 Nb 0.05 o 4 Preparation method of cathode material. Background technique [0002] Lithium-ion batteries have become the preferred power source for future electric vehicles and hybrid electric vehicles due to their advantages such as high specific energy, low self-discharge, long cycle life, light weight and environmental friendliness. Therefore, lithium-ion batteries and related materials have become one of the research hotspots of researchers all over the world. Among them, the cathode material has become a bottleneck restricting the large-scale application of lithium-ion batteries due to its high price and low specific capacity. In addition, compared with the negative electrode material, the energy density and power density of the positive electrode material are low, and it is also the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 伊廷锋岳彩波丁园诸荣孙周安娜
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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