A kind of stable lithium battery silicon-based negative electrode material and preparation method thereof
A silicon-based negative electrode material, lithium battery technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve problems such as inability to meet commercialization needs, poor product consistency, etc., and is conducive to rapid transmission and stability. , avoid the effect of further growth
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0033] Pretreatment of silicon-oxygen nanosheets: Mix silicon-oxygen nanosheets and anhydrous ethanol solution with a mass fraction of 5% silane coupling agent at a mass ratio of 1:10, and ultrasonically disperse for 10 minutes at an ultrasonic frequency of 45 kHz. Immerse at room temperature for 1 hour, filter, collect the filter cake, transfer the filter cake to an oven, and dry to constant weight at a temperature of 75°C to obtain pretreated silica nanosheets;
[0034] Mixing: in parts by weight, take 20 parts of pretreated silicon-oxygen nanosheets, 8 parts of graphene oxide, 5 parts of epoxy resin, 0.1 part of curing agent, and 1 part of lithium salt; , graphene oxide and lithium salt are poured into diluent 10 times the mass of graphene oxide, and ultrasonically dispersed for 10 minutes under the condition of ultrasonic frequency of 45kHz, then add epoxy resin and curing agent, and use a stirrer at a speed of 300r / min Stir and mix for 45 minutes to obtain a mixture;
[...
Embodiment 2
[0038] Pretreatment of silicon-oxygen nanosheets: mix silicon-oxygen nanosheets and anhydrous ethanol solution with a mass fraction of 10% of silane coupling agent at a mass ratio of 1:20, and ultrasonically disperse them for 20 minutes at an ultrasonic frequency of 50 kHz. Immerse at room temperature for 2 hours, filter, collect the filter cake, transfer the filter cake to an oven, and dry it to a constant weight at a temperature of 80°C to obtain pretreated silica nanosheets;
[0039] Mixing: in parts by weight, take 25 parts of pretreated silicon-oxygen nanosheets, 9 parts of graphene oxide, 8 parts of epoxy resin, 0.2 parts of curing agent, and 3 parts of lithium salt; , graphene oxide and lithium salt are poured into diluent with 15 times the mass of graphene oxide, under the condition of ultrasonic frequency of 60kHz, after ultrasonic dispersion for 20min, then add epoxy resin and curing agent, and use a stirrer at a speed of 400r / min Stir and mix for 50 minutes to obtai...
Embodiment 3
[0043]Pretreatment of silicon-oxygen nanosheets: Mix silicon-oxygen nanosheets and an anhydrous ethanol solution with a mass fraction of 15% of a silane coupling agent at a mass ratio of 1:50, and ultrasonically disperse them for 30 minutes at an ultrasonic frequency of 60 kHz. Immerse at room temperature for 3 hours, filter, collect the filter cake, transfer the filter cake to an oven, and dry to constant weight at a temperature of 85°C to obtain pretreated silica nanosheets;
[0044] Mixing: in parts by weight, take 30 parts of pretreated silicon-oxygen nanosheets, 10 parts of graphene oxide, 10 parts of epoxy resin, 0.3 parts of curing agent, and 5 parts of lithium salt; , graphene oxide and lithium salt are poured into diluent 20 times the mass of graphene oxide, under the condition of ultrasonic frequency of 80kHz, after ultrasonic dispersion for 60min, then add epoxy resin and curing agent, and use a stirrer at a speed of 500r / min Stir and mix for 60 minutes to obtain a ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| quality score | aaaaa | aaaaa |
| quality score | aaaaa | aaaaa |
| quality score | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More