1. Vim li cas cov roj teeb lithium xav tau cov khoom siv hluav taws xob ntxiv?
Conductive additives yog "electron highway" ntawm lithium roj teeb electrodes, lub luag hauj lwm rau ceev ceev electrons generated los ntawm active cov ntaub ntawv mus rau tam sim no collector, ncaj qha txiav txim siab roj teeb nyob rau hauv tsis kam, tus nqi peev xwm, thiab lub voj voog lub neej.
Lithium roj teeb cathode cov ntaub ntawv (xws li lithium hlau phosphate thiab cov ntaub ntawv ternary) muaj cov khoom siv tsis zoo, yog li cov khoom siv hluav taws xob yuav tsum tau ntxiv los tsim kom muaj kev sib txuas hluav taws xob zoo.
Kev xaiv thiab dispersion xeev ntawm conductive additives ncaj qha cuam tshuam rau peb lub ntsiab lus qhia:
Roj teeb Internal Resistance:Tsis tiav conductive network → nce nyob rau hauv tsis kam → nce tshav kub
Rate Peev Xwm:Tsis txaus conductive additive efficiency → muaj peev xwm ua tau zoo thaum lub sij hawm siab - tawm tam sim no
Lub neej voj voog:Lub peev xwm ntawm cov conductive network kom muaj kev ruaj ntseg thaum lub sij hawm ntim hloov pauv hauv tus nqi thiab tawm
2. Carbon Nanotubes vs. Carbon Dub: Peb Qhov Zoo Tshaj Plaws
Cov pa roj carbon nanotubes yog qhov zoo tshaj plaws rau cov pa roj carbon dub hauv cov qauv siv hluav taws xob, cov nyiaj ntxiv, thiab lub sijhawm ntev - lub voj voog ruaj khov. Qhov sib txawv tseem ceeb nyob hauv "line conduction" vs "point contact."
2.1 Conductive Structure: Point Contact vs. Line Contact
Cov pa roj carbon dub muaj nyob rau hauv peb-seem seem- saw / beaded particles, nrog cov kab hluav taws xob tsim los ntawm "point contact" sib tshooj ntawm cov khoom. Qhov teeb meem nrog cov qauv no yog tias ib zaug cov electrode tau hloov pauv thaum lub sij hawm them nqi thiab tso tawm, cov ntsiab lus hu tau yooj yim "sib cais," rhuav tshem cov khoom siv hluav taws xob.
Cov pa roj carbon nanotubes muaj ib qho - qhov ntev tubular qauv nrog ib qho ultra- qhov sib piv siab, ua rau lawv "nkaum" los ntawm cov hluav taws xob sab hauv los tsim txoj kev thauj mus los tsis tu ncua thiab ua tiav. Qhov no yog sib npaug rau kev tso ib qho "electron highway" nyob rau hauv lub electrode, tsis cuam tshuam los ntawm particle displacement.
| Sib piv Dimension | Conductive Carbon Dub | Cov pa roj carbon Nanotubes (CNT) | Graphene |
|---|---|---|---|
| Conductive Structure | Peb -dimensional branched saw / point contact | Ib -dimensional length-ntau kab kev coj ua | Ob -dimensional planar conduction |
| Kev muaj peev xwm ua tau | Zoo | Zoo heev | Sab saum toj -tier |
| Qhov zoo tshaj qhov ntxiv | 0.5%-3% | 0.2%-1% | 0.1%-0.5% |
| Electrode Processability | Txheej du | Me ntsis siab viscosity | Yooj yim rau agglomerate |
| Core Positioning | General puag txheej | Tus nqi siab, lub voj voog ntev | Qhov kawg conductivity |
2.2 Ntxiv Tus Nqi: Ib qho -Qhov thib peb ntawm Kev Siv Kom Zoo dua
Qhov sib ntxiv ntawm CNT conductive muab tshuaj yog tsuas yog 0.5% -1%. Thaum siv cov pa roj carbon dub ib leeg, cov pa ntxiv yog 2% -3%.
Qhov no txhais tau tias: siv 1 feem ntawm CNT tuaj yeem hloov 2-3 feem ntawm cov pa roj carbon dub, txuag qhov chaw nyob los ntawm cov khoom siv hluav taws xob ntxiv thiab tso cai rau cov khoom siv ntxiv rau hauv cov electrode - ncaj qha txhim kho lub roj teeb lub zog ceev.
2.3 Kev caij tsheb kauj vab thiab kev nyab xeeb: Lub neej roj teeb ntev dua, kev ua haujlwm zoo dua
Kev tshawb fawb piv rau kev ua tau zoo ntawm CNT thiab Super P hauv lithium hlau phosphate roj teeb:
| Performance Indicator | Super P Formulation | CNT Formulation |
|---|---|---|
| Roj teeb Surface Kub ntawm 10C tso tawm | 68 degree | 49℃(txo 19 degree) |
| Conductive Additive Dosage | Lub hauv paus | Tsuas yog 1/3 |
| Siab -Cycling kub ntawm 45 degree | Lub hauv paus | Zoo heev |
Cov qauv CNT siv tsuas yog 1/3 ntawm cov khoom siv hluav taws xob, tseem ua tiav cov roj teeb qis dua thiab zoo dua siab dua - qhov kub thiab txias ua haujlwm - txhais tau tias muaj kev nyab xeeb thiab ntev dua - roj teeb kav ntev.
3. Shandong Tanfeng Cov Khoom Siv Tshiab: Lub Siab -Tus Neeg Muag Khoom Zoo ntawm CNT Cov Tshuaj Txhuam Hniav
Shandong Tanfeng Cov Khoom Tshiab FB121 series carbon nanotube conductive paste muaj qhov zoo heev, nrog Fe impurities Tsawg dua lossis sib npaug li 30 ppm. Ib qho ntxiv ntawm tsuas yog 0.5% -1% yog xav tau los txhim kho cov roj teeb ua haujlwm tau zoo.
Shandong Tanfeng Tshiab Khoom Technology Co., Ltd. muab siab - zoo carbon nanotube conductive muab tshuaj txhuam cov khoom. Lub ntsiab tsis tseem ceeb ntawm cov khoom tseem ceeb FB121 series yog raws li nram no:
| Parameter | FB121 Series Specification |
|---|---|
| Qhov tshwm sim | Dub muab tshuaj txhuam |
| Cov ntsiab lus | 6.0±0.20% |
| CNT Cov ntsiab lus | 5.0±0.15% |
| Cov ntsiab lus Dispersant | 1.0±0.05% |
| Muab tshuaj viscosity | Tsawg dua lossis sib npaug li 3000 mPa·s |
| Cov ntsiab lus noo noo | Tsawg dua lossis sib npaug li 1000 ppm |
| Fe impurity | Tsawg dua lossis sib npaug li 30 ppm |
| Cr/Ni/Cu/Zn/Co | Txhua qhov tsawg dua lossis sib npaug li 5 ppm |
Core zoo:
High Purity:Fe impurities tswj qis dua 30 ppm, zoo dua li qib kev lag luam
Stable Dispersion:Siv cov txheej txheem dispersion tshwj xeeb, ruaj khov rau ntau tshaj 3 lub hlis
Npaj siv:Muaj nyob rau hauv ob qho tib si NMP-raws li thiab dej-raws li tshuab rau cov neeg siv khoom yooj yim
Daim ntawv thov dav:Ua haujlwm tshiab lub zog tsheb fais fab roj teeb, lub zog cia roj teeb, thiab lwm yam
Nrog rau CNT cov ntsiab lus ntawm 5%, cov neeg siv khoom tuaj yeem ncaj qha ntxiv 0.5%-1% kom ua tiav cov txiaj ntsig ua tau zoo.
Ib - kab lus cov ntsiab lus:Qhov tseem ceeb ntawm cov pa roj carbon nanotubes piv rau cov pa roj carbon dub yog "ua ntau dua nrog tsawg" - txo qhov ntxiv ntawm 3% mus rau 0.5%, thaum ua tiav cov roj teeb hauv lub cev qis dua, ruaj khov siab dua - kub caij tsheb kauj vab, thiab qis kub nce thaum tawm. Shandong Tanfeng Cov Khoom Tshiab FB121 series conductive muab tshuaj txhuam muab lub siab -cov ntaub ntawv raw khoom zoo rau qhov "point-line synergy" conductive solution.