Dɛn ne akwan a wɔfa so kata so?- Polinovel .

Dɛn ne akwan a wɔfa so kata so?

Akwan pii wɔ hɔ a wɔfa so kata so. Dip coating akwan no bi ne dip coating, roll coating, blade coating, ne wire-wound rod coating, etc. Nneɛma a wɔde kata so a wɔahyɛ da ayɛ no bi ne slide coating, slot-die coating, extrusion coating, ne curtain coating, ne nea ɛkeka ho Yɛaka akwan pii a wɔfa so kata so ho asɛm dedaw wɔ nsɛm a ɛkɔ akyiri wɔ atifi hɔ. Wɔ ase ha no yɛde akwan foforo a wɔfa so kata so no ba tiawa.

Dip coating yɛ coating kwan a wɛb no kɔ so de hyɛ mu na wɔtwe fi slurry tank no mu, na slurry a ɛboro so no san kɔ tank no mu, sɛnea wɔakyerɛ wɔ Mfonini 5-89 mu no. Dip coating taa yɛ mmɔho-afã a wɔde kata so, enti mpɛn pii no, wɛb no twetwe kwan no gyina nsu no ani so de hwɛ hu sɛ ade a wɔde kata so no mu duru a ɛwɔ wɛbsaet no afã abien no nyinaa yɛ pɛpɛɛpɛ. Mpɛn pii no, ade a wɔde kata so no mu duru gyina ntini a ɛyɛ den, ntini a ɛyɛ den, nhama no ahoɔhare, ne nea ɛtwetwe no so. Slurry coating thickness a ɛwɔ wɛb no so no bɛyɛ kɛse bere a slurry viscosity ne coating speed no kɔ soro no. Nokwarem no, dip coating nso fata ma adwumayɛ a ɛyɛ den a wɔde di dwuma bere ne bere mu, nanso sɛ solvent volatilization rate no yɛ ntɛmntɛm a, flow bɛba.

Fig 5-89 Dip Coating Method

Blade Coating yɛ ɔkwan a wɔfa so kata so a wɔde agyan di dwuma de tew slurry coating thickness so wɔ coating roll anaa web no so ma ɛyɛ thickness a wɔakyerɛ no, sɛnea wɔakyerɛ wɔ Mfonini 5{1}}90 mu no. Wɔn mu no, mframa a wɔde kata so ne nea wɔde kata so no mu duru-knife coating gyina mframa so-knife nhyɛso ne mframa jet velocity, na ɛfata titiriw ma coating a ɛba fam-Vosity anaa Medium-low-Viscosity Water Water a egyina Surries so. Sɛ wode organic solvent-based slurries redi dwuma a, ɛsɛ sɛ wohwɛ yiye na woakwati sɛ wobɛhyehyɛ nneɛma a ɛpae a efi mframa pii mu ne nsu a ɛyɛ hyew a ɛtumi hyew.

Fig 5-90 Blade Coating

Curtain coating yɛ ɔkwan a wɔfa so kata so a wɔde slurry no fi slot mu na ɛhwe ase tẽẽ kɔ running web no so wɔ curtain a ɛyɛ nsu mu. Ɛyɛ ɔkwan a wɔahyɛ da ayɛ a wɔde kata so no dea, sɛnea wɔakyerɛ wɔ Mfonini 5-91 mu no. Esiane sɛ ɔkwan a ɛda extrusion die lip ne web ntam no yɛ kɛse na mframa biara nni ntama no so nti, ɛwɔ mfaso horow a ɛda nsow wɔ sintɔ ahorow te sɛ nhama ne nsensanee a woyi fi hɔ no mu. Esiane sɛ ntama no ahoɔden a ɛkɔ so no yɛ kɛse nti, ɛboa ma meniscus no gyina, enti wobetumi ayɛ ade a wɔde kata so ntɛmntɛm. Ntrɛwmu ahoɔhare no betumi adu bɛboro 100 m/min na wɔregye atom kɛse wɔ battery coating solutions a ɛyɛ pɛpɛɛpɛ kɛse mu.

Figure 5-91 Falling curtain coating; Figure 5-92 Wire rod coating

Wire-wound rod coating yɛ ɔkwan a wɔfa so kata so a ɛde waya-wound metering rod di dwuma de kata nsuo so pɛpɛɛpɛ wɔ wɛb a ɛyɛ mmerɛw so, sɛnea wɔakyerɛ wɔ mfonini 5-92 mu no. Wire-akuru poma no yɛ nea wɔde dade a ɛnyɛ den a ɛyɛ den a ɛyɛ winding a ɛyɛ winding a ɛyɛ den a atwa core rod ho ahyia na ɛyɛ. Wɔsan frɛ waya-akuru poma no sɛ coating rod anaa doctor rod. Sɛ winding wire no yɛ teateaa paa a, coating thickness pɛpɛɛpɛyɛ no betumi adu microns kakraa bi mu. Esiane sɛ ɛnyɛ den sɛ-Viscosity nsu no sen fa kuru no dade hama no so nti, ɛfata sɛ wɔde kata nsu a ɛba fam a ɛwɔ viscosity so. Sɛ wɔde abaa soronko a wɔde kata so di dwuma a, ade a wɔde kata so no betumi ayɛ kɛse, na nea wɔde kata so no mu duru betumi adu 225 μm. Mpɛn pii no, wɔde rod coating speed no anohyeto yɛ 304 m/min.

Ɔkwan a wɔfa so kata so no yɛ adwuma a wɔayɛ no nhyehyɛe a nneɛma pii wɔ hɔ a ɛsɛ sɛ wosusuw ho. Nea edidi so yi ne nneɛma atitiriw a ɛsɛ sɛ wosusuw ho bere a worepaw ɔkwan a wɔfa so kata so no:

Akwan dodow no ara a wɔfa so kata so no fata sɛ wɔde kata ade biako so bere koro mu, na wɔde ade foforo kata so bere a wɔde ade a atwam no ayow awie no. Akwan bi betumi akata ntoatoaso pii so bere koro mu, te sɛ slide coating, a anyɛ yiye koraa no ebetumi akata ntoatoaso 9 so bere koro mu wɔ kɔla film coating mu. Ntama a wɔde kata so no ti a wɔde kata so no yɛ ti a wɔde kata so, na ade a wɔde kata so no nso sen kɔ fam wɔ anoano, enti wobetumi ayɛ nneɛma pii a wɔde kata so nso. Slot-Die coating ne extrusion coating taa yɛ biako-layer coating, nanso wobetumi nso anya extrusion slots abien anaa abiɛsa a wɔde bɛkata so wɔ ntoatoaso multilayer a lithium-Ion battery manufacturers hwehwɛ kɛse.

waya-wound rod coating no fata ma teateaa-layer coating; Extrusion coating, reverse roll coating, ne curtain coating no fata ma coating a ɛyɛ den, a ebetumi adu 400–750 μm. Sɛ yɛbɛka no ɔkwan biara so a, dodow a ade a wɔde kata so no yɛ mmerɛw no, dodow no ara na ɛyɛ den ma ade a wɔde kata so no kɛse. Ɛsɛ sɛ yɛhyɛ no nsow sɛ ne kɛse a wɔaka ho asɛm wɔ ha no yɛ nsu a wɔde kata so no mu duru, na nsonsonoe a ɛda ade a wɔde kata so a ɛyɛ dry ne nsu a wɔde kata so ntam no sõ yiye.

Viscosity ne viscoelasticity yɛ honam fam dodow a ɛda rheological su adi. Ɔkwan biara a wɔfa so kata so no wɔ nsu a ɛfata ne shear rate a ɛfata. Slurry viscosity no yɛ nea eye sen biara a wɔpaw no sɛnea viscosity a wɔsusuw wɔ coating shear rate no te, efisɛ viscosity no sesa ne shear rate no. Wɔ lithium battery slurry formulation a lithium-ion battery nneɛma a wɔde ma a edi kan no de ma no fam no, pɛpɛɛpɛ a ɛyɛ viscosity control abɛyɛ ade titiriw a ɛma adeyɛ no gyina pintinn. Nanso, wɔ preset quantity coating process no mu no, shear rate a slurry no taa de hyɛ mu no yɛ kɛse dodo, ma enti ɛyɛ den sɛ wobenya shear rate a ɛkorɔn saa ne mprempren nnwinnade no, enti viscosity estimation no yɛ rough, na awiei koraa no, nea efi sɔhwɛ mu ba no bedi nkonim. Ɛwom sɛ viscoelasticity ho hia yiye de, nanso ɛyɛ den sɛ wobɛka ho asɛm. Viscoelasticity bi boa ma nneɛma bi a wɔde kata so no yɛ adwuma yiye, nanso viscoelasticity a ɛkɔ soro no betumi ama twetwe sintɔ akyɛ.

Precision slot-die coating, slide coating, ne curtain coating wɔ coating pɛpɛɛpɛ a ɛkorɔn, bere a pɛpɛɛpɛ a wɔde kata so akwan afoforo no gyina nsu su, roller geometry, rotation speed, ne nneɛma afoforo so. Ɔkwan biara a wɔfa so kata so no wɔ ade a wɔde kata so kɛse, a egyina sɛnea wɔde ade a wɔde kata so no yɛ adwuma ne sɛnea ɛyɛ adwuma no so. Ɛdenam battery electrode coating mfiri a ɛyɛ fɛ yiye so nkutoo na wobetumi anya coating a eye.

Wɛb no betumi ayɛ nea ɛnyɛ{0}}a ɛtumi fa mu anaasɛ ɛtumi fa mu. Wɔ wɛb a ɛtumi fa mu no ho no, wobetumi asiw ntini no ano ansa na wɔakata so. Ɛho hia nso sɛ wosusuw roughness ne surface tension a ɛwɔ wɛb no so no ho. Ɛsɛ sɛ slurry no ani nhyɛso no ba fam sen nea ɛwɔ wɛb no mu no.

Coating speed no fa production efficiency ho. Sɛ ɛbɛyɛ yiye a, dodow a ade a wɔde kata so no yɛ ntɛmntɛm no, dodow no ara na eye. Akwan a wɔfa so kata so nyinaa wɔ ahoɔhare anohyeto a wɔde kata so, nanso akwan bi wɔ hɔ a eye sen biara wɔ soro-akata so. Curtain coating hwehwɛ sɛ nsuo a ɛsene no sua koraa na ama wɔahwɛ sɛ curtain no ntetew, enti wontumi nyɛ ahoɔhare a ɛkɔ soro-akatasoɔ no bere a layer no yɛ teateaa no. Wɔ slide coating mu no, sɛ coating layer no yɛ teateaa paa a, coating layer no rentumi nnyina. Ahoɔhare a ɛkorɔn ne ade a wɔde kata ade so a ɛyɛ den no boa ma wɔkwati sɛ ɛbɛkata so a entumi nnyina. Saa ara nso na smooth ne non-tumi a ɛyɛ adwuma wɔ wɛb so no betumi akata so wɔ ahoɔhare a ɛkorɔn mu. Ahoɔhare a wɔde kata ade so no nso fa ɔfã a ɛyow no tenten ho. Dodow a ɔfã a ɛma ɛyow no kyɛ no, dodow no ara na ɛyɛ papa sɛ ɛbɛma nsu a ɛyow no akɔ soro.

Akwan a wɔfa so kata so ne wɔn kwan a wɔfa so yɛ adwuma no wɔ Table 5-6.

Ɔfa	Ɔkwan a wɔfa so kata so .	Shear rate /s⁻1 .	Viscosity /pa·s .	Nsuo a ɛyɛ nsuo /μm .	Coating pɛpɛɛpɛ /% .	Ahoɔhare a ɛsen biara /(m/min) .	Nkɛntɛnso a ɛwɔ wɛb roughness so .
Leveling .	Leveling .	0.01-0.10	-	-	-	-	-
	Mframa sekan .	-	0.005-0.5	2-40	5	500	Soro
	Wire-wound poma a wɔde kata so .	-	0.02-1	5-50	10	250	Soro
layer a ɛyɛ biako .	Nkrantɛ a wɔde kata so .	1000-10000	0.5-40	1-30	-	1500	Soro
		20-40000
	Reverse roll a wɔde kata so .	100-10000	0.1-50	5-400	5	300	Kakraa bi .
		1000-100000
	Slot-die a wɔde kata so .	3000-100000	0.005-20	15-250	2	400	Kakraa bi .
	Extrusion a wɔde kata so .	-	50-5000	15-750	5	700	-
Multilayer .	Slide a wɔde kata so .	1000-10000	0.005-0.5	15-250	2	300	Kakraa bi .
		3000-12000
	Ntama a wɔde kata ntama so .	1000-10000	0.005-0.5	2-500	2	300	Kakraa bi .

Akwan a wɔfa so kata lithium-ion battery electrode sheets so titiriw ne roll coating ne extrusion coating. Reverse roll coating hwehwɛ sɛ shear rate a ɛkorɔn, ɛfata ma slurry a ɛwɔ viscosity a ɛkorɔn kakra, ɛnya coating film a ɛyɛ den ne coating quality pa, na mprempren ɛyɛ ɔkwan a wɔtaa fa so kata lithium-ion battery so. Extrusion coating gyina hɔ ma coating mfiridwuma a ɛkɔ anim kakra wɔ adwuma no mu. Wɔde nhyɛso pɔtee bi ba slurry no so bere a wɔde rekata so no, a wobetumi de adi dwuma de akata viscosity slurry a ɛkorɔn so. Electrode krataa a wonya no wɔ pɛpɛɛpɛyɛ a ɛkorɔn ne ahoɔhare a wɔde kata so ntɛmntɛm. Lithium battery mfiridwuma a ɛkɔ so no ne ahwehwɛde a ɛkɔ soro fi lithium{7}}ion battery manufacturers ma ahoɔden density a ɛkorɔn ne consistency, extrusion coating, a tebea-of-The-adwinni battery electrode coating nnwinnade ne high-precision battery coating ano aduru, bɛyɛ nea wɔde di dwuma kɛse wɔ akyi{12}.