Preparation method for converting photovoltaic cell EVA waste into conductive carbon black for secondary battery
Through the method of solid-liquid co-phase organic nanocarbon source coating and in-situ sintering, photovoltaic EVA waste is converted into conductive carbon black for secondary batteries, which solves the problems of waste treatment and conductive carbon black preparation, and realizes environmentally friendly and economical resource utilization and performance improvement.
Patent Information
- Application Number
- CN202510736241.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2025-10-17
AI Technical Summary
Photovoltaic cell EVA waste is difficult to degrade naturally, causing environmental pollution. At the same time, traditional conductive carbon black preparation methods are costly and complex, and cannot effectively utilize resources.
A solid-liquid co-phase organic nano-carbon source is coated on a photovoltaic EVA board, and conductive carbon black for secondary batteries is generated through in-situ sintering, including stirring, standing and calcining steps. A mixture of nano-cross-linked propylene resin and modified liquid is used as the carbon source, and the calcination temperature is carried out at 500-900°C.
The resource utilization of photovoltaic EVA waste is realized, environmental pollution is reduced, and the prepared conductive carbon black has good conductivity and stability, which simplifies the process and reduces costs and is suitable for different types of photovoltaic EVA waste.
Smart Images
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Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of secondary battery material preparation, and particularly relates to a preparation method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries. BACKGROUND
[0002] With the rapid development of the photovoltaic industry, the treatment of photovoltaic cell EVA waste has become an important problem. The EVA waste is difficult to degrade naturally and will cause environmental pollution if discarded at will. Meanwhile, the demand for conductive carbon black for secondary batteries is increasing, and the traditional preparation method of the conductive carbon black has problems such as high cost and complex process. How to convert the photovoltaic EVA waste into conductive carbon black for secondary batteries with high added value and realize the recycling of resources is a problem to be solved in the field. SUMMARY
[0003] In order to overcome the shortcomings of the prior art, the purpose of the application is to provide a preparation method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries. The solid-liquid co-phase organic nanometer carbon source is coated on the photovoltaic EVA plate, and the preparation method for generating conductive carbon black for secondary batteries in situ sintering. The method can effectively treat the photovoltaic EVA waste, and the prepared conductive carbon black has good conductivity and stability and can be applied to secondary batteries.
[0004] In order to achieve the above purpose, the technical scheme adopted by the application is: A preparation method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries, characterized in that the method comprises the following steps: Step 1. Under the condition of 25-40 DEG C, the solid-liquid co-phase organic nanometer carbon source and the pretreated photovoltaic EVA waste are weighed; the mass ratio of the solid-liquid co-phase organic nanometer carbon source to the pretreated photovoltaic EVA waste is (5-15):10; Step 2. The solid-liquid co-phase organic nanometer carbon source is coated on the surface of the photovoltaic EVA waste, and after stirring and mixing and standing, a sample is obtained; the stirring speed is 300-3000 rpm, the stirring time is 0.5-1 h, and the standing time is 1-3 h; Step 3. The sample prepared in step (2) is calcined and reduced under inert gas, the calcination temperature is 500-900 DEG C, the calcination time is 1-4 h, and finally the conductive carbon black for secondary batteries is prepared.
[0005] The solid-liquid co-phase organic nanometer carbon source in step (1) is a mixture of nanometer cross-linked propylene resin and nanometer modified liquid of olive oil or castor oil, and the mass ratio of the nanometer cross-linked propylene resin to the nanometer modified liquid is 1:1 or 2:3.
[0006] The photovoltaic EVA waste in step (1) needs to be pretreated to remove impurities and cut into appropriate size.
[0007] The mixing in step (2) adopts mechanical stirring or high-speed homogenizer.
[0008] The calcination atmosphere in step (3) is nitrogen, argon or hydrogen-argon mixed gas.
[0009] The beneficial effects of the present application are; 1. The present application converts photovoltaic EVA waste into conductive carbon black for secondary batteries, realizes the resource utilization of waste, reduces environmental pollution, and has significant environmental protection and economic value.
[0010] 2. The present application adopts the method of in-situ sintering of solid-liquid co-phase organic nanocarbon source coated on photovoltaic EVA plate, which does not need complex equipment and process, has low cost and simple operation.
[0011] 3. The conductive carbon black prepared by the present application has good conductivity and stability, and can effectively improve the performance of secondary batteries.
[0012] 4. The present application has wide application range and can process different types and states of photovoltaic EVA waste, and has strong adaptability. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the physical picture of EVA conductive carbon black after sintering in Example 3.
[0014] Figure 2 It is the SEM of EVA conductive carbon black after sintering. Figure 1 characterization.
[0015] Figure 3 It is the SEM of EVA conductive carbon black after sintering. Figure 2 characterization.
[0016] Figure 4 It is the SEM of EVA conductive carbon black after sintering. Figure 3 characterization.
[0017] Figure 5 It is the SEM of EVA conductive carbon black after sintering. Figure 4 characterization.
[0018] Figure 6 It is the surface multi-element distribution characterization of EVA conductive carbon black after sintering.
[0019] Figure 7 It is the surface carbon element distribution characterization of EVA conductive carbon black after sintering. DETAILED DESCRIPTION
[0020] The application is further described below in conjunction with the accompanying drawings and examples. Example 1
[0021] Preprocessing photovoltaic EVA waste: The photovoltaic EVA waste was removed of impurities and cut into small pieces of 2 cm x 2 cm.
[0022] Material weighing: 10 g of solid-liquid co-phase organic nanocarbon source (the mass ratio of nanocrosslinked propylene resin to nanomodified olive oil was 1:1) and 10 g of the pretreated photovoltaic EVA waste were weighed at 25°C.
[0023] Coating and mixing: The solid-liquid co-phase organic nanocarbon source was uniformly coated on the surface of the photovoltaic EVA waste, and mechanical stirring (speed of 500 rpm) was used for mixing for 0.5 h, followed by standing for 1 h.
[0024] Calcination reduction: The mixed sample was placed in a tube furnace and calcined at 500°C for 4 h under a nitrogen atmosphere to prepare conductive carbon black for secondary batteries. Example 2
[0025] Preprocessing photovoltaic EVA waste: The photovoltaic EVA waste was removed of impurities and cut into small pieces of 1 cm x 1 cm.
[0026] Material weighing: 15 g of solid-liquid co-phase organic nanocarbon source (the mass ratio of nanocrosslinked propylene resin to nanomodified castor oil was 2:3) and 10 g of the pretreated photovoltaic EVA waste were weighed at 30°C.
[0027] Coating and mixing: The solid-liquid co-phase organic nanocarbon source was uniformly coated on the surface of the photovoltaic EVA waste, and a high-speed homogenizer (speed of 2000 rpm) was used for mixing for 1 h, followed by standing for 2 h.
[0028] Calcination reduction: The mixed sample was placed in a tube furnace and calcined at 700°C for 2 h under an argon atmosphere to prepare conductive carbon black for secondary batteries. Example 3
[0029] Preprocessing photovoltaic EVA waste: The photovoltaic EVA waste was removed of impurities and cut into small pieces of 3 cm x 3 cm.
[0030] Material weighing: 5 g of solid-liquid co-phase organic nanocarbon source (the mass ratio of nanocrosslinked propylene resin to nanomodified olive oil was 1:1) and 10 g of the pretreated photovoltaic EVA waste were weighed at 40°C.
[0031] Coating mixing: The solid-liquid co-phase organic nanocarbon source was uniformly coated on the surface of photovoltaic EVA waste, and mixed by mechanical stirring (speed of 300 rpm) for 0.5 h, and then standing for 3 h.
[0032] Calcination reduction: the mixed sample was placed in a tube furnace, and calcined at 900 DEG C for 1 h under hydrogen-argon mixed gas atmosphere to prepare conductive carbon black for secondary batteries, as shown in Figure 1 , the SEM is as shown in Figures 2 to 5 , and the surface multi-element distribution characterization is as shown in Figures 6 to 7 .
Claims
1. A method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries, characterized in that: The following steps are involved: Step 1. Weighing a solid-liquid co-phase organic nanocarbon source and pretreated photovoltaic EVA waste at 25-40° C.; the mass ratio of the solid-liquid co-phase organic nanocarbon source to the pretreated photovoltaic EVA waste is (5-15):10; Step 2: applying the solid-liquid co-phase organic nanocarbon source on the surface of photovoltaic EVA waste, stirring and mixing, and standing to obtain a sample; the stirring speed is 300-3000 rpm, the stirring time is 0.5-1 hour, and the standing time is 1-3 hours; Step 3: calcining and reducing the sample obtained in step (2) under inert gas at a calcination temperature of 500 to 900° C. for 1 to 4 hours to finally obtain conductive carbon black for secondary batteries.
2. The method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries according to claim 1, characterized in that: The solid-liquid co-phase organic nano-carbon source in step (1) is a mixture of nano-crosslinked propylene resin and nano-modified liquid of olive oil or castor oil, and the mass ratio of nano-crosslinked propylene resin to nano-modified liquid is 1:1 or 2:
3.
3. The method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries according to claim 1, characterized in that: The photovoltaic EVA waste in step (1) needs to be pre-treated to remove impurities and cut into suitable sizes.
4. The method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries according to claim 1, characterized in that: The mixing in step (2) is performed by mechanical stirring or high-speed homogenizer.
5. The method for converting photovoltaic cell EVA waste into conductive carbon black for secondary batteries according to claim 1, characterized in that: The calcination atmosphere in step (3) is nitrogen, argon or a hydrogen-argon mixture.