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Preparation method of lithium ferrous oxalate ion battery negative electrode material with exposed specific oriented crystal faces

A lithium ferrous oxalate and ion battery technology, which is applied in battery electrodes, carboxylate preparation, carboxylate preparation, etc., to achieve low cost and enhance energy storage performance

Pending Publication Date: 2021-12-31
云南润久科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods still cannot well overcome all the problems faced by ferrous oxalate negative electrode materials.

Method used

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  • Preparation method of lithium ferrous oxalate ion battery negative electrode material with exposed specific oriented crystal faces
  • Preparation method of lithium ferrous oxalate ion battery negative electrode material with exposed specific oriented crystal faces
  • Preparation method of lithium ferrous oxalate ion battery negative electrode material with exposed specific oriented crystal faces

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Experimental program
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Effect test

Embodiment 1

[0024] A method for preparing a negative electrode material for a ferrous oxalate lithium ion battery exposing a specific orientation crystal plane, the specific steps of which are as follows:

[0025] Step 1. Disperse the ferric hydroxide precursor material in a mixed solution composed of 30ml ethanol and 100ml deionized water through an ultrasonic cleaner to obtain a uniformly dispersed mixed turbid solution; wherein, the volume ratio of the precursor material mass to the liquid solution For: 0.5 g: 130 ml;

[0026] Step 2. Add 1.3 g of ascorbic acid and 4.0 g of oxalic acid to the uniformly dispersed turbid liquid in step 1, and react at 80° C. for 12 h; after the reaction is completed, filter, wash and dry to obtain a ferrous oxalate material containing crystal water ;

[0027] Step 3. Sintering the crystal water-containing ferrous oxalate material obtained in step 3 at 280° C. for 2 hours under an argon atmosphere to obtain a ferrous oxalate material with exposed (202) c...

Embodiment 2

[0030] A method for preparing a negative electrode material for a ferrous oxalate lithium ion battery exposing a specific orientation crystal plane, the specific steps of which are as follows:

[0031] Step 1. Disperse the ferric hydroxide precursor material in a mixed solution composed of 30ml ethanol and 100ml deionized water through an ultrasonic cleaner to obtain a uniformly dispersed mixed turbid solution; wherein, the volume ratio of the precursor material mass to the liquid solution For: 0.5 g: 130 ml;

[0032] Step 2. Add 1.3g of ascorbic acid and 4.0g of oxalic acid to the uniformly dispersed turbid liquid in step 1, and react at 80°C for 12 h; after the reaction is completed, filter, wash and dry to obtain crystal water exposure (202) Crystalline ferrous oxalate material;

[0033] Step 3. Sintering the crystal water-containing ferrous oxalate material obtained in step 3 at 280° C. for 2 hours under an argon atmosphere to obtain a ferrous oxalate material with expose...

Embodiment 3

[0037] A method for preparing a negative electrode material for a ferrous oxalate lithium ion battery exposing a specific orientation crystal plane, the specific steps of which are as follows:

[0038] Step 1. Disperse the ferric hydroxide precursor material in a mixed solution composed of 30ml ethanol and 100ml deionized water through an ultrasonic cleaner to obtain a uniformly dispersed mixed turbid solution; wherein, the volume ratio of the precursor material mass to the liquid solution For: 0.5 g: 130 ml;

[0039] Step 2. Add 1.3g of ascorbic acid and 4.0g of oxalic acid to the uniformly dispersed cloudy liquid in step 1, and react at 60°C for 24 hours; after the reaction is completed, filter, wash and dry to obtain (202) crystals containing crystal water Surface ferrous oxalate material;

[0040] Step 3. Sintering the crystal water-containing ferrous oxalate material obtained in step 3 at 280° C. for 2 hours under an argon atmosphere to obtain a ferrous oxalate material ...

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Abstract

The invention relates to a preparation method of a lithium ferrous oxalate ion battery negative electrode material with exposed specific oriented crystal faces. An iron hydroxide precursor is added into a mixed solution composed of additives such as ascorbic acid and oxalic acid in a specific proportion, and synthesis of a ferrous oxalate nano-material exposing different oriented crystal faces is achieved by controlling the reduction dissolution rate of iron hydroxide in the solution and coordinating the nucleation growth process of the ferrous oxalate material. According to the invention, ascorbic acid is adopted to strengthen reduction dissolution of an acidic oxalic acid solution on ferric hydroxide and regulate and control atomic coordination and an initial crystal stacking rate of ferrous oxalate; meanwhile, the atomic coordination environment and the surface energy of ferrous oxalate crystal particles are interfered by using an organic solvent; therefore, the preparation of the ferrous oxalate material with exposed specific oriented crystal faces is achieved. The ferrous oxalate material with the exposed specific oriented crystal face growth can give full play to the advantages of different types of electrochemical reaction ion diffusion microchannels constructed by arrangement of different crystal face atoms and the characteristic of close arrangement of different oriented crystal face atoms to adjust material stress distribution and energy storage catalytic sites, and the lithium storage performance of the ferrous oxalate material is enhanced.

Description

technical field [0001] The invention relates to a preparation method of a high-capacity ferrous oxalate lithium ion battery negative electrode material exposed to a specific orientation crystal plane, and belongs to the technical field of lithium ion battery negative electrode materials. Background technique [0002] The rapid development of clean energy and the continuous emergence of various electronic devices have increased the demand for high-efficiency electrical energy storage devices. Lithium-ion batteries have become one of the outstanding representatives of many energy storage technologies due to their small size, high energy density and adjustable electrochemical performance. However, large-scale grid energy storage and new electric devices require lithium-ion batteries to have relatively high energy density and low price. In order to achieve the goal of cheap and high energy density lithium-ion battery fabrication, it is an effective way to explore new anode mate...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C55/07H01M4/60H01M10/0525
CPCC07C51/412H01M4/60H01M10/0525C07C55/07Y02E60/10
Inventor 姚耀春高耕
Owner 云南润久科技有限公司
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