Nyob rau hauv lithium roj teeb slurry mixing txheej txheem, CNT conductive slurry tau dhau los ua ib tug mainstream conductive additive. Daim ntawv thov txheej txheem, qhov sib ntxiv, thiab cov kev xav tau dispersion rau CNT slurry txawv heev ntawm cathode thiab anode systems. Ntau lub lithium roj teeb ua cov nroj tsuag tsuas yog siv tib qhov kev noj zaub mov tsis zoo rau ob qho tib si, uas tuaj yeem ua rau muaj teeb meem xws li cov ntawv electrode siab sab hauv tsis kam, txawv txav slurry rheology, thiab substandard voj voog lub neej. Qhia meej txog qhov sib txawv ntawm daim ntawv thov logics rau cathodes thiab anodes, thiab sib piv lawv nrog cov qib slurry uas tsim nyog, yog qhov tseem ceeb rau kev ua kom tiav qhov ntev -ntau yam kev sib txuas network zoo ntawm CNTs. Shandong Tanfeng tsom mus rau R&D thiab tsim cov CNT conductive slurries rau lithium roj teeb, tsim cov khoom tsim rau cathodes thiab anodes los pab cov tuam txhab roj teeb ua kom yooj yim rau lawv cov slurry - ua cov txheej txheem thiab stabilize electrode electrochemical kev ua tau zoo.
I. Core Application Qhov txawv ntawm Cathodes thiab Anodes
CNT conductive slurry rau cathodes tsom rau kev tsim cov kab hluav taws xob ntawm qhov sib ntxiv qis, haum rau NMP roj-raws li tshuab. Anode daim ntawv thov raug muab faib ua graphite anodes thiab silicon-raws li anodes, tau tshaj ob qho tib si roj-raws li thiab dej- raws li cov txheej txheem. Silicon-raws li anodes muaj cov kev xav tau siab dua rau CNT nam piv thiab slurry toughness. Tib qib ntawm slurry yuav tsum tsis txhob siv interchangeably rau ob leeg.
Cathode active cov ntaub ntawv muaj siab compaction ceev. Tus neeg sawv cev conductive feem ntau sau qhov sib txawv ntawm cov khoom kom txo qis kev tawm tsam sab hauv. Dhau li ntawm cov khoom siv hluav taws xob, lub anode yuav tsum tsis txhob ntim cov khoom ntim nthuav dav, tshwj xeeb tshaj yog rau silicon-raws li anodes, qhov twg CNTs yuav tsum tsim kom muaj kev sib txuas sib txuas tau yooj yim los tiv thaiv cov kab hluav taws xob los ntawm kev tawg. Cov tsis tseem ceeb rau cov xwm txheej sib txawv yog raws li hauv qab no:
| Daim ntawv thov Scenario | Common Solvent System | CNT Dry Basis Ntxiv | Lub Hom Phiaj Core | Kev pheej hmoo | Keeb kwm siv |
|---|---|---|---|---|---|
| NCM (Ternary) Cathode | NMP Roj-raws li | 0.2%‑0.6% | Tsawg sab tshua, tsis sib xws dispersion, tsis muaj kev cuam tshuam rau compaction | Agglomeration ua rau cov pob dub ntawm electrodes, siab impedance | Lithium Battery Industry Conductive Agent Application Manual |
| LFP Cathode | NMP Roj-raws li | 0.3%‑0.8% | Txhim kho particle contact, txhim khu kev ua tau zoo | Loj viscosity fluctuations nyob rau hauv slurry, unstable txheej cheeb tsam qhov ceev | GB/T 33818-2017 |
| Conventional Graphite Anode | Dej -raws li | 0.15%‑0.4% | Txo cov anode sab hauv tsis kam, txhim kho kev caij tsheb kauj vab | Lithium plating txaus ntshai vim tsis zoo dispersion | Cov ntaub ntawv txheeb xyuas cov kab ntau lawm |
| Silicon{0}}Carbon Composite Anode | Dej / NMP tau tshaj | 0.4%‑1.0% | Saj zawg zog conductive network, withstand ntim expansion | Kev caij tsheb kauj vab nrawm nrawm vim CNTs tsis txaus | Laboratory thiab fais fab roj teeb tsav cov ntaub ntawv |
Shandong Tanfeng subdivides cov khoom rau txawv scenarios. FB series yog tsim los rau roj-raws li cathodes, nrog nruj impurity tswj kom txo cov roj teeb sab. FB dej-raws li series yog haum rau graphite thiab silicon-carbon anodes, muab zoo dispersion stability thiab yoog raws aqueous slurry- ua ib puag ncig, yog li cov neeg siv khoom tsis tas yuav rov kho cov txheej txheem dispersion.
II. Yuav Siv CNT Conductive Slurry li cas hauv Lithium Battery Cathodes
Rau kev siv cathode, CNT conductive slurry yuav tsum zoo dua ntxiv los ntawm kev ua ntej -kev sib xyaw, tsis qhuav- sib tov ncaj qha nrog cov hmoov nquag. Lub hom phiaj yog los tswj cov slurry fineness thiab impurity cov ntsiab lus kom phim siab -voltage cathode kev khiav hauj lwm tej yam kev mob.
Cathode ntau lawm feem ntau siv NMP hnyav system. Tus txheej txheem kev khiav hauj lwm yog:
Ua tiav cov binder PVDF hauv NMP los npaj cov tshuaj binder.
Ntxiv cov CNT conductive slurry thiab do ntawm qis ceev kom ua ntej -mix, tso cai rau CNTs pib tawg mus rau hauv cov tshuaj binder.
Ntxiv cov cathode active khoom thiab cov pa roj carbon dub conductive tus neeg sawv cev, ces ua rau kom cov stirring ceev rau siab - ceev dispersion.
Thaum viscosity thiab fineness ua tau raws li cov qauv, lim thiab hloov cov slurry mus rau txheej txheej.
Cov ntsiab lus tseem ceeb ua haujlwm:
Tsis txhob nchuav CNT conductive slurry ncaj qha mus rau hauv siab -khoom- cov ntsiab lus qhuav hmoov, vim qhov no tuaj yeem ua rau agglomerates yooj yim.
Rau NCM systems, nruj me ntsis tswj cov hlau impurities los tiv thaiv roj teeb tus kheej - paug. Shandong Tanfeng's cathode- tshwj xeeb slurry nruj me ntsis tswj cov hlau impurities xws li hlau thiab tooj liab, nyob rau hauv multi-theem purification thiab pom ua ntej shipping.
Rau LFP systems, siv CNTs ua ke nrog cov pa roj carbon dub tuaj yeem sib npaug ntawm qhov kev ua tau zoo thiab tus nqi, tau txais txiaj ntsig zoo dua li siv cov pa roj carbon dub ib leeg.
Lub Hoobkas tawm tswv yim qhia tias qee lub tuam txhab ntxiv CNT slurry lig dhau lawm hauv cov txheej txheem lossis mus rau hauv siab - sib xyaw tank ceev nrog lub sijhawm sib xyaw tsis txaus. Qhov no ua rau tsis tiav CNT disentanglement, ua rau hauv zos siab impedance ntawm daim ntawv electrode thiab voltage tee thaum lub sij hawm ntsuas ntsuas. Kho qhov kev noj zaub mov yog tsim nyog.
III. Yuav Siv CNT Conductive Slurry li cas hauv Lithium Battery Anodes
Ob leeg graphite thiab silicon -carbon anodes tuaj yeem siv CNT conductive slurry. Dej-raws li anodes yog lub ntsiab. Kev noj zaub mov yuav tsum ua ntej ua ntej- sib tov nrog CMC binder tov. Rau silicon-carbon anodes, qhov qhuav- qhov tseem ceeb ntxiv yuav tsum tau nce kom tsim nyog, thiab yuav tsum tau them nyiaj rau slurry rheology thiab elasticity.
Txheem Slurry-Ua Txheej Txheem rau Dej-raws li Graphite Anodes:
Dissolve CMC nyob rau hauv cov dej ntshiab los npaj ib tug binder tov.
Ntxiv cov CNT conductive slurry thiab sib tov ntawm qis ceev kom txog thaum sib xws.
Ntxiv cov graphite/silicon- cov khoom siv roj carbon activated thiab cov pa roj carbon dub, tom qab ntawd ua haujlwm siab - nrawm nrawm.
Thaum kawg, ntxiv SBR binder thiab sib tov ntawm qis ceev los kho viscosity, ua kom tiav cov anode slurry npaj.
Cov ntsiab lus tseem ceeb ntawm cov txheej txheem:
SBR latex yuav tsum tsis txhob tov nrog CNT conductive slurry ntawm kev kub ceev rau lub sijhawm ntev, vim qhov no tuaj yeem ua rau demulsification. Nws yuav tsum tau ntxiv rau qhov kawg ntawm cov txheej txheem ntawm qhov ceev ceev.
Qhov qhuav -piv txwv ntxiv rau cov pa graphite anodes tsis tas yuav siab dhau. Overdosing tuaj yeem nyem qhov sib npaug ntawm cov ntaub ntawv, ua rau cov ntawv electrode hmoov shedding.
Silicon cov ntaub ntawv hauv silicon -carbon anodes nthuav dav loj. Lawv cia siab rau CNTs sib cuam tshuam los tsim ib lub network hloov tau. Yog li ntawd, tus nqi ntxiv yog siab dua rau cov pa graphite anodes nyob rau hauv cov xwm txheej zoo sib xws.
Shandong Tanfeng's FB dej-raws li CNT conductive slurry yog sib xws nrog cov dej-raws li anode systems thiab qhia tau hais tias zoo compatibility nrog CMC thiab SBR, nrog tsawg tsawg txaus ntshai ntawm flocculation. Ntau silicon-carbon anode manufacturers ncaj qha txais cov qib no, txo lawv cov sijhawm tsim kho.
IV. Feem ntau Pitfalls hauv Kev Siv CNT Conductive Slurry rau Cathodes thiab Anodes
Kev sib xyaw cov qib tsis raug, siv cov khoom noj tsis raug, thiab qhov muag tsis pom kev nce ntxiv yog peb qhov teeb meem feem ntau hauv kev siv CNT slurry rau cathodes thiab anodes. Cov no tuaj yeem ua rau cov slurry txawv txav thiab kev ua haujlwm ntawm roj teeb.
| Teeb meem Phenomena | Keeb kwm | Kev tiv thaiv |
|---|---|---|
| Fine particles/dub me ntsis hauv cathode slurry | Siv anode-qib slurry rau cathodes; incompatible dispersant system; lub sij hawm sib tov tsis txaus thaum pub mis | Hloov mus rau cathode- tshwj xeeb slurry; optimize cov txheej txheem ua ntej - sib tov; nce kev tshuaj ntsuam xyuas |
| Flocculation thiab agglomeration hauv dej-raws li anode slurry | Direct high -kev sib xyaw ntawm CNT slurry nrog SBR | Premix CNTs nrog CMC daws ua ntej; ntxiv SBR tom qab ntawm qhov ceev ceev |
| Kev nrawm nrawm nrawm thiab muaj peev xwm poob hauv anode | Tsis txaus CNT ntxiv rau silicon{0}}carbon anode; tawg conductive network | Ua kom CNT qhuav -piv txwv; xaiv ib tug siab -yam- piv, anode- tshwj xeeb slurry |
| Siab tus kheej- tawm hauv cov nplooj ntawv cathode electrode | Tshaj hlau impurities nyob rau hauv slurry | Xaiv cov khoom los ntawm cov tuam txhab tsim khoom nrog kev tswj hwm impurity nruj; ua txhua yam kev tshuaj xyuas cov khoom nkag |
Ntau lub Hoobkas, nrhiav kev yooj yim, siv ib hom CNT slurry rau ob qho tib si cathode thiab anode. Txawm li cas los xij, cov tshuab sib txawv muaj qhov sib txawv dispersants thiab impurity specifications. Txawm hais tias cov teeb meem yuav tsis tshwm sim thawj zaug, teeb meem xws li tus kheej - tso tawm thiab caij tsheb kauj vab anomalies nto thaum lub sij hawm tsim khoom loj. Shandong Tanfeng muab cov lus pom zoo xaiv qib raws li tus neeg siv khoom lub roj teeb chemistry kom tsis txhob poob ntau lawm los ntawm cov qib tsis sib haum.
V. Cov lus pom zoo rau kev soj ntsuam cov khoom tuaj thiab cov txheej txheem sim
Nws yog ib qho tseem ceeb los ua pov thawj ntawm cov khoom tuaj ua ntej kev tsim khoom. Tsis txhob cia siab rau cov ntsiab lus tshwj xeeb. Muab cov kev ua kom zoo, kev tiv thaiv, thiab kev sib raug zoo hauv kev sim me me - kom paub meej tias tsim nyog rau koj cov khoom sib xyaw tshwj xeeb ua ntej scaling mus rau ntau lawm.
Thaum tau txais cov qauv CNT conductive slurry, ua ntej kos lub Hoobkas kuaj daim ntawv tshaj tawm, xyuam xim rau cov ntsiab lus khoom, CNT cov ntsiab lus, hlau impurities, thiab fineness.
Ua me me - nplai slurry sim ua cov txheej txheem ntau lawm. Saib rau agglomeration lossis flocculation, thiab sim cov slurry lub viscosity thiab electrode daim ntawv resistivity.
Thaum me me - ntsuas electrochemical xeem dhau, maj mam nce mus rau qhov kev sim sim, thiab thaum kawg mus rau ntau lawm.
Ua raws li cov chaw tsim khoom yuav tsum khaws cia, xyuas kom muaj kev sib khi thiab tswj qhov kub thiab txias, thiab ua kom huv si rov qab- do slurry ua ntej siv.
Shandong Tanfeng tuaj yeem muab cov qauv sim rau cov neeg siv khoom sib koom tes thiab muab kev txhawb nqa. Peb pab neeg tuaj yeem qhia txog kev noj zaub mov noj, nplawm nrawm, thiab sijhawm sib xyaw ua ke raws li tus neeg siv khoom cov khoom uas twb muaj lawm, pab txo lawv cov qauv kev debugging.
Daim ntawv thov ntawm CNT conductive slurry nyob rau hauv lithium roj teeb cathodes thiab anodes tsis tuaj yeem generalized. Cathodes feem ntau yog siv NMP roj-raws li cov tshuab, nrhiav cov impurities qis thiab qis qis qis. Anodes feem ntau siv dej-raws li cov tshuab, nrog silicon-carbon anodes muab qhov tseem ceeb dua rau cov kev hloov pauv hloov pauv tau tsim los ntawm CNTs. Nws yog ib qho tseem ceeb kom tsis txhob sib xyaw cov qib sib txawv ntawm cov txheej txheem arbitrarily thiab nruj me ntsis tswj cov txheej txheem pub noj thiab nplawm. Xaiv qhov tsim nyog CNT conductive slurry thiab ua ke nrog me me - teev validation yog tib txoj kev kom paub txog qhov zoo ntawm CNT conductivity. Shandong Tanfeng muab cov khoom lag luam zoo matrix ntawm nplooj siab CNT conductive slurries rau ob qho tib si cathodes thiab anodes, nrog rau cov txheej txheem kev daws teeb meem, los pab cov tuam txhab roj teeb lithium ua tiav cov khoom ruaj khov.