Yuav ua li cas Nano Graphene Hmoov Tiv Thaiv Lub Peev Xwm Roj Teeb Poob

Cov Ntsiab Lus Tseem Ceeb

Vim Li Cas Cov Roj Teeb Thiaj Poob Peev Xwm

Koj lub roj teeb poob peev xwm dhau sijhawm. Peb qhov teeb meem tseem ceeb ua rau qhov kev ua tsis tiav no. Kev nkag siab txog txhua qhov teeb meem yuav pab koj pom tias nano graphene hmoov daws lawv li cas.

Kev tawg ntawm electrode thiab kev ntxhov siab ntawm lub cev

Kev them thiab tso tawm ntau zaus ua rau koj lub roj teeb cov electrodes o thiab ntsws. Qhov kev ntxhov siab no ua rau tawg. Cov txheej txheem ua raws li qhov kev txiav txim siab meej:

1. Cov lithium ions nkag mus rau hauv cov khoom siv thaum lub sijhawm them. Qhov no hloov cov kev teeb tsa lattice thiab ntim.
2. Cov nqi them sai dua ua rau muaj qhov sib txawv ntawm qhov concentration. Qhov saum npoo nthuav dav dua li sab hauv.
3. Kev ntxhov siab hauv zos yuav tsim ntau zuj zus. Thaum nws tshaj qhov khoom siv lub zog tawg, ces yuav muaj kab nrib pleb.
4. Kev voj voog ua rau cov kab nrib pleb no nthuav dav. Cov khoom me me thaum kawg tawg ua tej daim me me lossis txiav tawm ntawm tus neeg sau tam sim no.

Thaum cov hlau silicon sib xyaw nrog lithium thaum lub sijhawm them, nws dhau los ua qhov hloov pauv volumetric tshaj 300%, tsim kev ntxhov siab mechanical uas ua rau cov khoom tawg, electrode delamination, thiab kev puas tsuaj sai.

Qhov tawg no ua rau pom cov chaw tshiab. Nws kuj ua rau puas tsuaj rau txheej tiv thaiv ib puag ncig.

Kev Tsis Ruaj Ntseg ntawm SEI Txheej thiab Kev Siv Lithium

Cov txheej electrolyte interphase (SEI) khov kho tsim rau ntawm anode thaum lub sijhawm them thawj zaug. Nws tiv thaiv cov electrolyte kom tsis txhob lwj ntxiv. Txawm li cas los xij, cov txheej no tsis khov. Kev ntxhov siab ntawm electrode nthuav dav ua rau SEI tawg. Qhov chaw anode tshiab raug nthuav tawm. Ntau SEI tsim los npog nws. Cov txheej txheem no siv cov lithium ions uas ua haujlwm. Cov ions no raug kaw hauv SEI mus tas li. Lawv tsis tuaj yeem hloov pauv ntawm cov electrodes. Koj lub roj teeb poob peev xwm siv tau.

Ntawm cov silicon liab qab, qhov tuab ntawm SEI loj hlob mus txog 100–300 nanometers tom qab 100 lub voj voog. Qhov tuab no thaiv kev thauj mus los ntawm lub zog. Nws kuj siv lithium ntau dua. Qhov tshwm sim yog qhov muaj peev xwm ploj mus sai.

Kev Sib Txuas Lus Lithium thiab Kev Tsim Dendrite

Nyob rau hauv qee qhov xwm txheej, cov hlau lithium tsim rau ntawm qhov chaw anode es tsis txhob ntxig rau hauv cov khoom siv. Cov lithium no loj hlob mus rau hauv cov qauv zoo li koob hu ua dendrites. Dendrites ua rau muaj ob qhov teeb meem:

• Lawv nkag mus rau hauv qhov separator thiab tsim cov luv luv sab hauv.
• Lawv rhuav tshem lub anode thiab raug cais tawm hluav taws xob. Cov lithium tuag no tsis pab txhawb rau lub peev xwm lawm.

Cov hluav taws xob siab ua rau muaj cov tshuaj lom neeg uas ua rau cov electrolyte tawg. Cov kab nrib pleb tsim ntawm qib kev ntxhov siab qis li 25% ntawm qhov ntsuas kev puas tsuaj ib txwm muaj. Cov kab nrib pleb no ua rau cov dendrites loj hlob sai dua. Koj lub roj teeb poob peev xwm mus tas li thiab tej zaum yuav ua tsis tiav loj heev.

Yuav ua li cas Nano Graphene Hmoov Tiv Thaiv Txhua Hom Kev Ua Tsis Tau Zoo

Kev Txhawb Nqa Hluav Taws Xob

Hmoov graphene nano daws qhov teeb meem ntawm electrode tawg. Nws cov qauv ob-seem ua haujlwm zoo li lub scaffold molecular. Lub scaffold no tuav cov khoom siv electrode ua ke thaum lub sijhawm them thiab tso tawm. Thaum lub electrode o, cov ntawv graphene faib cov kev ntxhov siab sib npaug. Lawv tiv thaiv cov kab nrib pleb los ntawm kev tsim thiab loj hlob.

Koj tau txais lub electrode muaj zog dua. Lub graphene network tseem khaws nws cov qauv txawm tias tom qab ntau pua lub voj voog. Qhov kev txhawb nqa no ua rau cov khoom me me txuas nrog lub collector tam sim no. Nws kuj tiv thaiv lub electrode kom tsis txhob tawg. Koj lub roj teeb tseem nyob ruaj khov thiab txuas ntxiv xa cov peev xwm tag nrho.

Kev Ua Haujlwm Zoo Dua thiab Kev Tsim SEI Sib Xws

Kev coj hluav taws xob yog qhov tseem ceeb rau kev ua haujlwm ntawm lub roj teeb. Nano graphene hmoov yog ib qho khoom siv hluav taws xob muaj zog. Nws muaj thaj chaw loj. Thaum koj ntxiv nws rau hauv cov electrodes roj teeb, nws ua rau kev coj hluav taws xob zoo dua yam tsis tas yuav muaj cov pa roj carbon ntau. Koj tuaj yeem ntxiv graphene rau hauv anode kom siv nws cov kev coj hluav taws xob thiab thaj chaw loj rau kev ua kom zoo dua qub thiab kev txhim kho kev ua haujlwm.

Nov yog nws ua haujlwm li cas:

• Kev tsim cov network conductiveHauv cov tshuab hluav taws xob qhuav, graphene ua haujlwm ua lub network conductive uas tsis hnyav thiab ua haujlwm tau zoo. Nws txhim kho lub peev xwm, kev ua haujlwm C-rate, thiab kev khaws cia peev xwm.
• Kev hloov pauv dub carbonKoj tuaj yeem siv graphene ncaj qha rau hauv kev tsim khoom siv slurry. Nws hloov lossis txo cov pa roj carbon dub. Qhov no txhim kho lub peev xwm, C-rate peev xwm, thiab kev khaws cia lub peev xwm yam tsis cuam tshuam rau cov txheej txheem uas twb muaj lawm.
• Cov khoom siv txheej txheemKev siv graphene los pleev cov khoom siv nquag pab kom them thiab tso tawm sai dua. Nws muab kev ua hluav taws xob zoo. Nws kuj ua haujlwm ua ib qho kev thaiv uas ruaj khov rau cov tshuaj lom neeg. Qhov kev thaiv no txwv tsis pub muaj SEI tsim. Nws txhawb nqa lub roj teeb ntev dua.

Lub network graphene sib xws pab kom txheej SEI sib npaug. Ib txheej SEI ruaj khov siv lithium tsawg dua. Nws kuj tiv thaiv cov electrolyte kom tsis txhob lwj ntxiv. Koj lub roj teeb khaws tau ntau lub peev xwm dhau sijhawm.

Kev txo qis ntawm Lithium Dendrites

Cov roj teeb lithium dendrites yog qhov txaus ntshai rau kev nyab xeeb thiab lub neej ntev ntawm lub roj teeb. Nano graphene hmoov tsim ib qho kev thaiv lub cev uas tiv thaiv kev loj hlob ntawm dendrite. Cov ntawv graphene tsim ib lub network ntom ntom, conductive ntawm qhov chaw anode. Lub network no thaiv kev tsim cov qauv lithium zoo li koob.

Lub network graphene kuj faib cov hluav taws xob sib npaug. Lub teb sib npaug no tiv thaiv qhov kev sib sau ua ke ntawm cov lithium ions hauv zos. Yog tsis muaj cov hotspots no, cov dendrites yuav tsis tuaj yeem pib loj hlob. Koj tau txais lub roj teeb muaj kev nyab xeeb dua nrog lub neej voj voog ntev dua.

Yog xav paub txog qhov zoo ntawm lub roj teeb, xav txogNano Graphene Hmoov CAS 1034343-98-0 Hoobkas Nqe Rau Roj Teeb QibCov khoom no muaj qhov huv siab thiab kev ua tau zoo uas koj xav tau rau cov roj teeb txhim khu kev qha.

Kev Ua Tau Zoo thiab Kev Koom Tes Hauv Lub Ntiaj Teb Tiag

Tej zaum koj yuav xav tsis thoob tias nano graphene hmoov ua haujlwm li cas sab nraum chav kuaj. Kev tsim roj teeb hauv ntiaj teb tiag tiag muaj cov teeb meem tshwj xeeb. Kev nkag siab txog cov teeb meem no pab koj soj ntsuam seb cov khoom siv no puas haum rau koj cov kev xav tau ntau lawm.

Kev Sib Piv Nrog Cov Khoom Siv Carbon Ib Txwm Muaj

Cov roj teeb ib txwm siv cov pa roj carbon dub lossis graphite ua cov khoom siv hluav taws xob. Cov ntaub ntawv no ua haujlwm tab sis muaj kev txwv. Cov pa roj carbon dub xav tau kev thauj khoom siab kom ua tiav kev hluav taws xob txaus. Cov khoom siv ntxiv no siv qhov chaw uas tuaj yeem tuav cov khoom siv nquag. Graphite muaj kev hluav taws xob zoo dua tab sis tsis muaj cov khoom siv txhawb nqa zoo li graphene.

Hmoov graphene Nano ua tau zoo dua ob qho kev xaiv hauv ntau txoj kev. Nws cov qauv ob-seem muab thaj chaw loj dua rau ib chav tsev. Koj xav tau graphene tsawg dua kom ua tiav tib theem conductivity. Qhov kev ua tau zoo no txhais tau tias muaj chaw ntau dua rau cov khoom siv nquag hauv koj lub electrode. Cov ntsiab lus ntawm cov khoom siv nquag ntau dua txhais tau tias muaj zog ntau dua rau koj lub roj teeb.

Cov khoom siv kho tshuab kuj txawv ntau heev. Cov pa roj carbon dub tsis txhawb cov qauv electrode. Lawv tsuas yog sau cov qhov sib txawv ntawm cov khoom siv nquag. Txawm li cas los xij, cov ntawv graphene qhwv ib puag ncig thiab txuas cov khoom me me. Lub network no tuav txhua yam ua ke thaum lub sijhawm them thiab tso tawm. Koj lub electrode tswj nws qhov kev ncaj ncees ntev dua li cov khoom siv ntxiv ib txwm muaj.

Cov teeb meem kev koom ua ke no tseem ceeb rau koj qhov kev txiav txim siab. Koj yuav tsum ntsuas qhov txiaj ntsig ntawm kev ua tau zoo piv rau qhov kev hloov kho hauv kev tsim khoom. Ntau tus neeg tsim khoom pom tias qhov kev sib pauv no tsim nyog. Kev txhim kho kev khaws cia peev xwm ua pov thawj rau qhov kev hloov pauv thawj zaug ntawm kev tsim khoom.

Nano Graphene Hmoov CAS 1034343-98-0 Hoobkas Nqe Rau Roj Teeb Qib

Koj xav tau ib qho chaw ntseeg tau raucov khoom siv roj teeb. Nano Graphene Hmoov CAS 1034343-98-0 Lub Hoobkas Nqe Rau Roj Teeb Qib muab qhov sib xws uas koj cov khoom xav tau. Cov khoom no xa cov khoom huv siab nrog cov ntsiab lus carbon ntau dua 97%. Qhov loj me ntawm cov khoom me me uas tswj tau ua kom muaj kev sib kis zoo hauv koj cov electrode slurry.

Cov lus qhia txhawb kev sib koom ua ke tsis muaj teeb meem. Qhov ceev ntawm cov kais dej hauv qab 0.1 g / cm³ txhais tau tias cov hmoov tawg yooj yim. BET thaj chaw ntawm 180-280 m² / g rau cov qib txheem. Cov kev xaiv thaj chaw siab dua ncav cuag 720-900 m² / g rau cov ntawv thov uas xav tau thaj chaw sib cuag siab tshaj plaws. Koj tuaj yeem xaiv qib uas phim koj cov tshuaj lom neeg roj teeb tshwj xeeb.

Cov dej noo nyob qis dua 1.0% ntawm 105 ° C rau ob teev. Qhov dej noo qis no tiv thaiv cov tshuaj tiv thaiv tsis xav tau thaum lub sijhawm npaj electrode. Cov hmoov tawg ncaj qha rau hauv cov kua dej lossis cov kuab tshuaj. Koj tuaj yeem siv ultrasound kom ua tiav cov dej sib xws, ruaj khov. Qhov kev ywj pheej no ua rau koj cov txheej txheem tsim khoom yooj yim.

Nano Graphene Hmoov CAS 1034343-98-0 Lub Hoobkas Nqe Rau Roj Teeb Qib muaj nyob rau hauv cov kev xaiv ntim khoom los ntawm 10 grams mus rau 1 kilogram. Koj tuaj yeem ntsuas los ntawm kev sim tshawb fawb mus rau kev tsim khoom sim yam tsis hloov cov neeg muag khoom. Cov qauv nqi Hoobkas ua rau kev suav tus nqi yooj yim rau koj cov txheej txheem kev siv nyiaj.

Cov Kev Kawm Txog Cov Ntaub Ntawv: Cov Tsheb Fais Fab thiab Cov Khoom Siv Hluav Taws Xob Uas Nqa Tau

Cov roj teeb tsheb fais fab ntsib teeb meem nyuaj heev. Kev them sai sai ua rau muaj cua sov thiab kev ntxhov siab ntawm lub cev. Hmoov graphene nano daws tau ob qho teeb meem no tau zoo. Ib lub tuam txhab tsim khoom siv hluav taws xob tau muab graphene rau hauv lawv cov anode uas muaj silicon ntau. Lub network graphene tau pab txhawb nqa 300% ntawm cov khoom silicon uas nthuav dav. Tom qab 500 lub voj voog them, lub roj teeb khaws cia 87% ntawm nws lub peev xwm qub. Cov khoom siv carbon ib txwm muaj hauv tib daim ntawv thov khaws cia tsuas yog 62%.

Kev them ceev kuj tau zoo dua. Lub network graphene conductive txo qhov kev tiv thaiv sab hauv los ntawm 40%. Qhov kev txo qis no tso cai rau kev them nqi siab dua yam tsis muaj cua sov ntau dhau. Cov tsav tsheb tuaj yeem them lawv lub tsheb hauv 15 feeb es tsis yog 45 feeb. Lub roj teeb tswj tau qhov kub thiab txias kom zoo thoob plaws hauv cov txheej txheem.

Cov khoom siv hluav taws xob uas nqa tau muaj ntau yam kev xav tau sib txawv. Koj lub roj teeb ntawm koj lub xov tooj ntse yuav tsum muaj sia nyob tau ntau pua lub voj voog hauv qhov chaw me me. Kev txwv ntawm qhov chaw txhais tau tias txhua millimeter suav nrog. Kev ua haujlwm ntawm graphene ua cov khoom siv hluav taws xob ua rau muaj kev ywj pheej rau cov khoom siv nquag. Ib lub tuam txhab tsim khoom siv laptop tau nce lawv lub peev xwm roj teeb los ntawm 18% tsuas yog hloov ntawm carbon dub mus rau graphene.

Cov txiaj ntsig ntawm kev ruaj khov ntawm txheej SEI ua pov thawj tseem ceeb ib yam li ntawd hauv cov khoom siv nqa tau. Cov khoom siv no feem ntau tsis siv rau lub sijhawm ntev. Cov txheej SEI uas tsis ruaj khov yuav lwj txawm tias thaum lub cuab yeej kaw lawm. Cov electrodes uas muaj graphene txhawb nqa khaws cia lawv qhov SEI kom zoo thaum lub sijhawm khaws cia. Cov neeg siv khoom tshaj tawm tias muaj kev poob peev xwm tsawg dua thaum lub sijhawm khaws cia khoom siv mus sij hawm ntev.

Cov thev naus laus zis hnav tau sawv cev rau lwm qhov kev siv uas tab tom loj hlob tuaj. Cov khoom siv no xav tau cov roj teeb uas yoog tau uas khoov tau raws li lub cev tib neeg. Kev yoog tau ntawm graphene ua rau nws zoo tagnrho rau lub hom phiaj no. Lub network graphene tswj tau qhov conductivity txawm tias thaum lub roj teeb khoov tau ntau txhiab zaus. Cov pa roj carbon ib txwm muaj tawg thaum khoov ntau zaus, ua rau lub roj teeb tsis ua haujlwm tam sim ntawd.

Cov pov thawj los ntawm cov kev tshawb fawb no taw qhia rau qhov xaus lus meej. Nano graphene hmoov muab kev txhim kho ntsuas tau thoob plaws ntau yam kev siv. Txawm koj tsim cov roj teeb EV lossis cov khoom siv hluav taws xob me me, cov khoom siv no txhim kho koj cov khoom ua tau zoo. Muaj cov teeb meem kev koom ua ke, tab sis kev ua tau zoo nce ntxiv yog qhov tsim nyog rau kev siv zog.

Hmoov Nano graphene daws tau tag nrho peb qhov kev tua lub peev xwm: kev ntxhov siab ntawm lub tshuab, SEI tsis ruaj khov, thiab lithium plating. Koj tau txais lub network conductive ruaj khov uas khaws cia lub peev xwm rau ntau pua lub voj voog. Cov khoom siv no sawv cev rau kev hloov pauv tseem ceeb hauv kev tsim roj teeb, tsis yog qhov hloov me me. Nrog rau cov kev xaiv scalable xws li Nano Graphene Hmoov CAS 1034343-98-0 Lub Hoobkas Nqe Rau Qib Roj Teeb, kev saws txais yuav loj hlob sai. Cov roj teeb tiam tom ntej yuav suav nrog graphene ua tus qauv tivthaiv.

Cov Lus Nug Feem Ntau