Preparation method of ferroferric-oxide-based high-performance negative electrode material for lithium ion battery

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of expensive raw materials, complicated process, and low yield, and achieve low cost, simple preparation process, and high yield high effect

Active Publication Date: 2013-07-17
加道材料科技嘉兴有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating mostly adopts hydrothermal carbon coating method or direct introduction of graphene carrier

Method used

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  • Preparation method of ferroferric-oxide-based high-performance negative electrode material for lithium ion battery
  • Preparation method of ferroferric-oxide-based high-performance negative electrode material for lithium ion battery
  • Preparation method of ferroferric-oxide-based high-performance negative electrode material for lithium ion battery

Examples

Experimental program
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Example Embodiment

[0033] Example 1:

[0034] Weigh 1.35 g FeCl 3 ·6H 2 O was dissolved in 30 ml of ethylene glycol and stirred to form a clear yellow solution, which was recorded as solution A. Weigh 3.6 g of NaAc into 40 ml of ethylene glycol, then add 1 ml of polyethylene glycol 200 (PEG200), and magnetically stir to form a transparent solution B. Solution B was added dropwise to solution A to form a tan homogeneous solution. The mixture was continuously stirred for 10 minutes, then 0.3 g of activated carbon was added and dispersed ultrasonically, and finally the suspension was poured into a 100 ml hydrothermal kettle with a PTFE lining, and heated at 160 o React at C for 48 h. The black powder obtained by the reaction was centrifuged, washed, and subjected to a vacuum condition of 70 o Dry for 6 h at C, and finally get Fe 3 O 4 / C Composite materials. The 80 wt.% Fe obtained 3 O 4 / C composite material, 10 wt.% acetylene black and 10 wt.% CMC are mixed uniformly to form a slurry, which is uni...

Example Embodiment

[0036] Example 2:

[0037] Weigh 1.35 g FeCl 3 ·6H 2 O was dissolved in 30 ml of ethylene glycol and stirred to form a clear yellow solution, which was recorded as solution A. Weigh 3.6 g of NaAc into 40 ml of ethylene glycol, then add 1 ml of polyethylene glycol 200 (PEG200), and magnetically stir to form a transparent solution B. Solution B was added dropwise to solution A to form a tan homogeneous solution. The mixture was continuously stirred for 10 minutes, and then 0.5 g of activated carbon was added and dispersed ultrasonically. Finally, the resulting suspension was poured into a 100 ml hydrothermal kettle with a PTFE lining, and heated at 200 o React at C for 48 h. The black powder obtained by the reaction was centrifuged, washed and vacuumed at 90 o Dry for 6 h at C, and finally get Fe 3 O 4 / C Composite materials. The 80 wt.% Fe obtained 3 O 4 / C composite material, 10 wt.% acetylene black and 10 wt.% CMC are mixed uniformly to form a slurry, which is uniformly coated...

Example Embodiment

[0039] Example 3:

[0040] Weigh 1.35 g FeCl 3 ·6H 2 O was dissolved in 30 ml of ethylene glycol and stirred to form a clear yellow solution, which was recorded as solution A. Weigh 3.6 g of NaAc into 40 ml of ethylene glycol, then add 1 ml of polyethylene glycol 200 (PEG200), and magnetically stir to form a transparent solution B. Solution B was added dropwise to solution A to form a tan homogeneous solution. The mixture was continuously stirred for 10 minutes, and then 1 g of activated carbon was added and dispersed by ultrasound. Finally, the suspension was poured into a 100 ml hydrothermal kettle with PTFE lining, and heated at 220 o React at C for 48 h. The black powder obtained by the reaction was centrifuged, washed, and subjected to a vacuum condition of 70 o Dry for 6 h at C, and finally get Fe 3 O 4 / C Composite materials. The 80 wt.% Fe obtained 3 O 4 / C composite material, 10 wt.% acetylene black and 10 wt.% CMC are mixed uniformly to form a slurry, which is uniform...

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Abstract

The invention discloses a preparation method of ferroferric oxide/carbon composite negative electrode material for a lithium ion battery, and belongs to the field of new energy resources and electrochemistry. According to the invention, a Fe3O4/C composite negative electrode material with a nano porous structure is prepared by taking inorganic iron salt as an iron source, taking a carbon matrix as a carrier, and adopting a solvothermal method. The carbon matrix is directly introduced into reaction liquid, transformation of the spherical structure of carbon particles occurs in the solvothermal process, and active substances of nano iron oxide are absorbed on the surfaces of the porous carbon particles so as to form the Fe3O4/C composite negative electrode material with an embedding structure; the carbon matrix is used for fixing the nano iron oxide particles to improve the structural stability of the electrode on one hand, and forms a conducting network to be beneficial to fast transmission of electrons on the other hand, so that the polarization of the electrode is reduced and the rate capability of the electrode is improved. The ferroferric oxide/carbon composite negative electrode material synthesized according to the invention has the advantages that the particle powder is fine and is distributed uniformly, the preparation process is simple, the condition is mild, the cost is low and the electrochemical performance is excellent.

Description

[0001] technical field [0002] The invention belongs to the field of new energy materials and electrochemistry, and in particular relates to a novel rechargeable and dischargeable lithium-ion battery ferric oxide / carbon (Fe 3 o 4 / C) Composite anode material and its preparation method. technical background [0003] Lithium-ion battery is a new type of energy storage battery developed after the 1970s. Due to its high energy density, long life, no memory effect, small self-discharge, small internal resistance, and high cost performance, lithium-ion batteries have shown great advantages in gradual applications and are widely used in mobile phones, notebook computers, cameras, Digital cameras, electric vehicles, energy storage, aerospace and other fields. [0004] Lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, and electrolyte solutions. Electrode materials are the key factors that determine the overall performance level of lithium-ion...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M4/62
CPCY02E60/10
Inventor 赵海雷曾志鹏王捷吕鹏鹏张天厚
Owner 加道材料科技嘉兴有限公司
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