Particulate electrode material having coating made of crystalline inorganic material and/or inorganic-organic hybrid polymer and method for production thereof

A polymer coating and electrode material technology, applied in the direction of electrode manufacturing, active material electrodes, hybrid capacitor electrodes, etc., can solve problems such as rising resistance and difficulties, and achieve low resistance value, high safety, and long service life Effect

Inactive Publication Date: 2015-07-29
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This manifests itself in an elevated resistance due to more difficult transport of ions into the active material
Said high resistance in turn has a detrimental effect on energy density and power density

Method used

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  • Particulate electrode material having coating made of crystalline inorganic material and/or inorganic-organic hybrid polymer and method for production thereof
  • Particulate electrode material having coating made of crystalline inorganic material and/or inorganic-organic hybrid polymer and method for production thereof
  • Particulate electrode material having coating made of crystalline inorganic material and/or inorganic-organic hybrid polymer and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1 - Preparation of Nanostructured Particulate Coatings on Particulate Electrode Materials

[0082] An example is Li(Ni,Co,Mn)O 2 Zinc oxide fine-grained coating on the surface, which consists of tiny (d<20nm), almost the same size, uniformly distributed zinc oxide crystallites.

[0083] Preparation by a modified Pechini sol-gel method, a further development of the process for preparing unstructured particle coatings is possible:

[0084] 500 mL of water and ethanol were added to a 1000 mL flask at a ratio of 1:8. Under the condition of continuous stirring, 1.34 g of zinc acetate was firstly added, and then 500 μL of nitric acid (10 mol / L) was added dropwise to the solution. Subsequently, 2.57 g of citric acid and 30 g of polyethylene glycol were added.

[0085] In parallel with this, 40g of Li(Ni,Co,Mn)O to be coated 2 Dispersed into another 100 mL of solvent (1:8 ratio of water to ethanol).

[0086] After stirring for 1 hour, 100 mL had Li(Ni, Co, Mn)O ...

Embodiment 2

[0089] Example 2 - Preparation method of hybrid polymer coating on particulate electrode material

[0090] Synthesis of Li-ion-conducting hybrid polymers (=coating materials)

[0091] In a 250 mL flask, 152 g (0.29 mol) of 2-methoxypolyethylenepropoxytrimethoxysilane were stirred with 2.634 g of lithium hydroxide (mixture 1).

[0092] In parallel, 23.6 g (0.1 mol) of 3-glycidyloxypropyltrimethoxysilane and 140 g of diethyl carbonate were weighed into a 100 mL flask, to which was added 2.7 g (0.15 mol) of distilled water (mixture 2) . The mixture is stirred.

[0093] After reaching the clear point of mixture 2, a homogeneous mixture 1 was added thereto.

[0094] After a few days, the solvent was centrifuged at 40° C. and a pressure of 28 mbar.

[0095] Coating method

[0096] In a 1L flask, under the condition of argon, weigh 30g of the battery material. Subsequently, 400 g of dimethyl carbonate and 0.9 g of coating material (optionally containing lithium salt or 0....

Embodiment 3

[0099] Example 3 - Preparation of Nanostructured Particulate Coatings and Hybrid Polymer Coatings on Particulate Electrode Materials method

[0100] Step 1: Synthesis of electron-conducting coatings prepared from metal oxide crystallites

[0101] 500 mL of water and ethanol at a ratio of 1:8 were added to a 1000 mL flask.

[0102] Under continuous stirring, 1.34 g of zinc acetate (optionally containing a small portion of aluminum acetate) was first added, and then 500 μL of nitric acid (10 mol / L) was added dropwise to the solution.

[0103] Subsequently, 2.57 g of citric acid and 30 g of polyethylene glycol were added. In parallel with this, 40g of Li(Ni,Co,Mn)O to be coated 2 Dispersed into another 100 mL of solvent (1:8 ratio of water to ethanol).

[0104] After stirring for 1 hour, 100 mL of Li(Ni, Co, Mn)O 2 A solvent for the microparticles is added to the coating solution. The mixture was then stirred for a further 24 hours.

[0105] Subsequently, the coated m...

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Abstract

The invention relates to a particulate electrode material which has a high energy density, security and durability (stability against degradation and material fatigue). The electrode material is also characterized by having a high electric conductivity and also a high ionic conductivity and as a result reaches very low resistance values. Furthermore, the invention also relates to a method for coating particulate electrode material, according to which the claimed electrode material can be produced. The invention further relates to uses of the claimed electrode material.

Description

technical field [0001] According to the present invention, particulate electrode materials are provided which have high energy density, high safety and long service life (stability against degradation and material fatigue). In addition, the electrode material is characterized by high electrical conductivity and high ionic conductivity, thereby achieving lower resistance values. Furthermore, according to the present invention, there is provided a method of coating a particulate electrode material, by which method the electrode material according to the present invention can be produced. Finally, the use of the electrode material according to the invention is demonstrated. Background technique [0002] An innovative approach described subsequently is the surface passivation of electrode materials in lithium accumulators, which is durable and which results from a reaction with the electrolyte. This is usually followed by a gradual degradation of the electrode material. It is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/00H01G11/30H01M4/04H01M4/131H01M4/1391H01M4/36H01M4/525H01M4/62H01M4/02
CPCH01M4/525H01G11/50Y02E60/122H01M4/62H01M4/622H01M4/0471H01M4/366H01M4/1391H01G11/38H01M4/131H01M2004/021H01G11/42Y02E60/10H01G11/26H01G11/86H01M4/0416H01M4/505H01M4/628Y02E60/13
Inventor 安德里亚斯·比特内尔乌维·古恩托比尔克-伊丽莎白·奥尔索斯基约亨·舒尔茨曼弗雷德·罗默尔莫里茨·米尔德维里加·安菲姆威特
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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