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Preparing method of lithium ionic cell 5V anode material spherical LiNi*Mn*O*

A technology for lithium ion batteries and cathode materials, which is applied in the field of energy materials and new material preparation, can solve problems such as low bulk density, and achieve the effects of simple process flow, improved electrochemical performance, and easy industrial production.

Inactive Publication Date: 2008-12-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LiNi synthesized by these methods 0.5 mn 1.5 o 4 The materials all have good electrochemical properties, but the appearance of the products is irregular particles, and their packing density is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1. preparation concentration is the manganese sulfate of 1.5mol / L and the nickel sulfate mixed aqueous solution of 0.5mol / L; Preparation concentration is the sodium carbonate aqueous solution of 2mol / L; Preparation concentration is the ammonia solution of 1mol / L. The three aqueous solutions were respectively input into a 3-liter reactor previously filled with deionized water with a metering pump for reaction. Control the flow rate of the nickel-manganese mixed solution and the sodium carbonate solution to be 150mL / h, adjust the flow rate of the ammonia solution to control the pH value of the reaction solution in the reactor to be 9±0.2. The temperature of the solution in the reactor was controlled to be 45°C. The mixed material liquid in the reactor is naturally overflowed and discharged. After continuous feeding for 20 hours, stop feeding, discharge the materials in the reactor, and use a centrifuge for solid-liquid separation. Wash the solid product with ...

Embodiment 2

[0031] Embodiment 2. preparation concentration is the manganese nitrate of 0.75mol / L and the nickel nitrate mixed aqueous solution of 0.25mol / L; Preparation concentration is the sodium bicarbonate aqueous solution of 1mol / L; Preparation concentration is the ethylenediammonium aqueous solution of 0.5mol / L. The three aqueous solutions were respectively input into a 3-liter reactor previously filled with deionized water with a metering pump for reaction. The flow rate of the nickel-manganese mixed solution and the sodium bicarbonate solution is controlled to be 180mL / h, and the flow rate of the ammonia solution is adjusted to control the pH value of the reaction solution in the reactor to be 8±0.2. The temperature of the solution in the reactor was controlled to be 60°C. The mixed material liquid in the reactor is naturally overflowed and discharged. After continuous feeding for 20 hours, stop feeding, discharge the materials in the reactor, and use a centrifuge for solid-liquid...

Embodiment 3

[0032] Embodiment 3. preparation concentration is the manganese acetate of 3.75mol / L and the nickel acetate mixed aqueous solution of 1.25mol / L; Preparation concentration is the potassium carbonate aqueous solution of 5mol / L; Preparation concentration is the ammonia solution of 2mol / L. The three aqueous solutions were respectively input into a 3-liter reactor previously filled with deionized water with a metering pump for reaction. Control the flow rate of nickel-manganese mixed solution and potassium carbonate solution to be 120mL / h, adjust the flow rate of ammonia solution to control the pH value of the reaction solution in the reactor to be 10±0.2. The temperature of the solution in the reactor was controlled to be 40°C. The mixed material liquid in the reactor is naturally overflowed and discharged. After continuous feeding for 20 hours, stop feeding, discharge the materials in the reactor, and use a centrifuge for solid-liquid separation. Wash the solid product with dei...

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Abstract

The invention relates to a preparation method of 5V level anode material of a lithium ion battery, namely, ball LiNi0.5Mn1.5O4, and pertains to the energy material and novel material preparation technology field. The method includes the steps that: a liquid mixture of manganese salt and nickel salt which is prepared according to a molar ration of 3:1, reacts with dissoluble carbonate or bicarbonate water solution and ammonia or ethylene diamine water solution to obtain ball MnCO3-NiCO3, processes of centrifugal separation, washing and drying are carried out, ball Mn2O3-Ni2O3 powder is obtained by heat treatment at 400 DEG C to 600 DEG C, the ball Mn2O3-Ni2O3 powder is mixed with lithium salt compound, ball LiNi0.5Mn1.5O4 is obtained by heat treatment at 700 DEG C to 900 DEG C. The LiNi0.5Mn1.5O4 anode material obtained by the method has high purity and relatively high specific capacity; the product grain is a ball shape, with high tap density which can reach 2.2 to 2.5 g question mark cm <-3>; the ball grain can provide a beneficial condition to the further carrying out of surface coating and to the improvement of the cycle stability of the material, and has great practical value in the field of high energy density and high power lithium ion battery.

Description

technical field [0001] The invention relates to a spherical LiNi lithium-ion battery 5V positive electrode material 0.5 mn 1.5 o 4 The preparation process belongs to the field of energy material and new material preparation technology. Background technique [0002] Lithium-ion battery is a new generation of green high-energy battery, which is widely used in mobile phones, notebook computers and other fields. However, at present, lithium-ion batteries are still mainly small-capacity and low-power batteries, and medium-to-large-capacity, medium-to-high-power lithium-ion batteries have not yet been mass-produced, making lithium-ion batteries not yet widely used in the field of power batteries. [0003] Cathode materials are an important part of lithium-ion batteries. The most studied cathode materials so far are lithium-transition metal composite oxide cathode materials and polyanion cathode materials, mainly including LiCoO 2 , LiNiO 2 , LiMn 2 o 4 、LiNi 0.8 co 0.2 o...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/48H01M4/04C01D15/00C01G1/02C01G53/00
CPCY02E60/10
Inventor 高剑应皆荣姜长印万春荣李建军陈克勤
Owner TSINGHUA UNIV
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