Hōʻuluʻulu manaʻo o ke kaʻina hana hoʻoulu o ka slurry electrode maikaʻi a maikaʻi ʻole o ka pākahiko lithium ion

ʻO ka mea mua, ke kumumanaʻo o ka hoʻohuihui ʻana
Ma ka hoʻoulu ʻana i nā pahi a me ke kiʻikuhi wili e hoʻohuli kekahi i kekahi, hoʻoulu ʻia a mālama ʻia ka hoʻokuʻu mechanical, a hoʻonui ʻia ka hoʻoili nui ma waena o nā pae wai a me nā pae paʻa. Hoʻokaʻawale pinepine ʻia ka hoʻoulu ʻana o ka wai paʻa i nā ʻāpana penei: (1) ka hoʻokuʻu ʻana o nā ʻāpana paʻa; (2) ka hoʻokuʻu hou ʻana o nā ʻāpana i hoʻopaʻa ʻia; (3) ke komo ʻana o nā ʻāpana i hoʻokuʻu ʻia i loko o ka wai; (4) ka hoʻohana ʻana ma waena o nā ʻāpana a ma waena o nā ʻāpana a me nā hoe. ʻO ka ikaika ke kumu o ka hoʻopuehu ʻana o nā ʻāpana a i ʻole ka hoʻomalu ʻana i ka nui o ka ʻāpana; (5) ka hoʻoili nui ma waena o ka wai a me ka paʻa.

ʻO ka lua, ka hopena hoʻoulu

Hoʻohuihui maoli ke kaʻina hana hoʻohuihui i nā ʻāpana like ʻole i loko o ka slurry i kahi lakio maʻamau e hoʻomākaukau i kahi slurry e hoʻomaʻamaʻa i ka uhi like a hōʻoia i ke kūlike o nā ʻāpana pou. ʻO ka laulā o nā mea hoʻohui he ʻelima mau kaʻina hana, ʻo ia hoʻi: pretreatment, blending, wetting, dispersion a me flocculation o nā mea maka.

ʻO ke kolu, nā ʻōkuhi slurry

1, mānoanoa:

Ua wehewehe ʻia ke kūʻē ʻana o kahi wai i ke kahe ʻana ʻo ia ka nui o ke koʻikoʻi shear e pono ai no kēlā me kēia mokulele 25 px 2 ke kahe nei ka wai ma ka wikiwiki o 25 px/s, i kapa ʻia ʻo ka kinematic viscosity, ma Pa.s.
ʻO ka viscosity kahi waiwai o nā wai. Ke kahe ka wai i loko o ka pipeline, aia ʻekolu mau kūlana o ke kahe laminar, ke kahe transitional, a me ke kahe turbulent. Aia pū kēia mau kūlana kahe ʻekolu i loko o nā lako hoʻoulu, a ʻo kekahi o nā palena nui e hoʻoholo ai i kēia mau kūlana ʻo ia ka viscosity o ka wai.
I ka wā o ke kaʻina hana hoʻowali, ua manaʻo nui ʻia ʻo ka viscosity ma lalo o 5 Pa.s he wai viscosity haʻahaʻa, e like me: ka wai, ka ʻaila castor, ke kō, ka jam, ka meli, ka ʻaila lubricating, ka emulsion viscosity haʻahaʻa, a pēlā aku; ʻO 5-50 Pas he wai viscosity waena No ka laʻana: ka ʻīnika, ka toothpaste, a pēlā aku; ʻO 50-500 Pas he mau wai viscosity kiʻekiʻe, e like me ka chewing gum, plastisol, wahie paʻa, a pēlā aku; ʻoi aku ma mua o 500 Pas he mau wai viscosity kiʻekiʻe loa e like me: nā hui rubber, nā mea hoʻoheheʻe plastic, ka Silicon organik a pēlā aku.

2, ka nui o ka ʻāpana D50:

ʻO ka nui o ka nui o ka ʻāpana he 50% ma ka nui o nā ʻāpana i loko o ka slurry

3, ʻike paʻa:

ʻO ka pakeneka o ka mea paʻa i loko o ka slurry, ʻo ka lakio theoretical o ka ʻike paʻa he emi ia ma mua o ka ʻike paʻa o ka ukana

ʻO ka hā, ke ana o nā hopena i hui pū ʻia

ʻO ke ʻano hana no ka ʻike ʻana i ke ʻano like o ka hui ʻana a me ka hui ʻana o kahi ʻōnaehana hoʻokuʻu wai-paʻa:

1, ana pololei

1) Ke ʻano viscosity: ka laʻana ʻana mai nā kūlana like ʻole o ka ʻōnaehana, ke ana ʻana i ka viscosity o ka slurry me ka viscometer; ʻo ka liʻiliʻi o ka deviation, ʻoi aku ka like o ka hui ʻana;

2) ʻAno hana ʻāpana:

ʻO A, ka laʻana mai nā kūlana like ʻole o ka ʻōnaehana, me ka hoʻohana ʻana i kahi scraper nui o ka ʻāpana e nānā i ka nui o ka ʻāpana o ka slurry; ʻo ka kokoke o ka nui o ka ʻāpana i ka nui o ka pauka mea maka, ʻoi aku ka like o ka hui ʻana;

B, ka laʻana ʻana mai nā kūlana like ʻole o ka ʻōnaehana, me ka hoʻohana ʻana i kahi mea hoʻāʻo nui o ka ʻāpana diffraction laser e nānā i ka nui o ka ʻāpana o ka slurry; ʻo ka maʻamau o ka hoʻolaha nui o ka ʻāpana, ʻo ka liʻiliʻi o nā ʻāpana nui, ʻoi aku ka like o ka hui ʻana;

3) Ke ʻano koʻikoʻi kikoʻī: laʻana mai nā kūlana like ʻole o ka ʻōnaehana, ke ana ʻana i ka nui o ka slurry, ʻo ka liʻiliʻi o ka ʻokoʻa, ʻoi aku ka like o ka hui ʻana

2. Ana pololei ʻole

1) Ke ʻano hana paʻa (macroscopic): Ke kau ʻana i nā laʻana mai nā kūlana like ʻole o ka ʻōnaehana, ma hope o ka mahana kūpono a me ka manawa hoʻomoʻa, ke ana ʻana i ke kaumaha o ka ʻāpana paʻa, ʻo ka liʻiliʻi o ka ʻokoʻa, ʻoi aku ka like o ka hui ʻana;

2) SEM/EPMA (microscopic): hāpana mai nā wahi like ʻole o ka ʻōnaehana, e hoʻopili i ka substrate, hoʻomaloʻo, a nānā i nā ʻāpana a i ʻole nā ​​​​mea i loko o ka ʻiliʻili ma hope o ka hoʻomaloʻo ʻana i ka slurry e ka SEM (electron microscope) / EPMA (electron probe) Distribution; (ʻo nā mea paʻa o ka ʻōnaehana he mau mea alakaʻi maʻamau)

ʻElima, kaʻina hana hoʻoulu ʻanode

ʻEleʻele kalapona alakaʻi: Hoʻohana ʻia ma ke ʻano he mea alakaʻi. Hana: Hoʻohui i nā ʻāpana mea hana nui e hoʻomaikaʻi i ka conductivity.

ʻO ka latex Copolymer — SBR (styrene butadiene rubber): hoʻohana ʻia ma ke ʻano he mea hoʻopaʻa. Inoa kemika: Styrene-Butadiene copolymer latex (polystyrene butadiene latex), latex wai-hoʻoheheʻe ʻia, ʻike paʻa 48 ~ 50%, PH 4 ~ 7, kiko hau -5 ~ 0 °C, kiko paila ma kahi o 100 °C, mahana mālama 5 ~ 35 ° C. ʻO SBR kahi polymer dispersion anionic me ka paʻa mechanical maikaʻi a me ka hana, a he ikaika hoʻopaʻa kiʻekiʻe.

ʻO Sodium carboxymethyl cellulose (CMC) - (carboxymethyl cellulose sodium): hoʻohana ʻia ma ke ʻano he mea hoʻomānoanoa a me ka mea hoʻopaʻa. ʻO ke ʻano he pauka fiber floc keʻokeʻo a melemele paha a i ʻole ka pauka keʻokeʻo, ʻaʻohe ʻala, ʻono ʻole, ʻaʻohe mea ʻawahia; hoʻoheheʻe ʻia i ka wai anuanu a i ʻole ka wai wela, e hana ana i kahi gel, he kūlike ʻole ka hopena a i ʻole he alkaline iki, ʻaʻole hoʻoheheʻe ʻia i ka ethanol, ether, ʻO kahi mea hoʻoheheʻe organik e like me ka isopropyl alcohol a i ʻole acetone e hoʻoheheʻe ʻia i loko o kahi hopena wai 60% o ka ethanol a i ʻole acetone. He hygroscopic ia, paʻa i ka mālamalama a me ka wela, emi ka viscosity me ka hoʻonui ʻana i ka mahana, paʻa ka hopena ma ka pH 2 a 10, ʻoi aku ka haʻahaʻa o ka PH ma mua o 2, ua hoʻoheheʻe ʻia nā mea paʻa, a ʻoi aku ka kiʻekiʻe o ka pH ma mua o 10. ʻO ka mahana hoʻololi kala he 227 ° C, ʻo ka mahana carbonization he 252 ° C, a ʻo ka ʻili o ka hopena wai 2% he 71 nm/n.

ʻO ke kaʻina hana hoʻoulu a me ka uhi ʻana o ka anode penei:

 
ʻO ke ono, ke kaʻina hana hoʻoulu cathode

ʻEleʻele kalapona alakaʻi: Hoʻohana ʻia ma ke ʻano he mea alakaʻi. Hana: Hoʻohui i nā ʻāpana mea hana nui e hoʻomaikaʻi i ka conductivity.

NMP (N-methylpyrrolidone): hoʻohana ʻia ma ke ʻano he mea hoʻoheheʻe hoʻoulu. Inoa kemika: N-Methyl-2-polyrrolidone, ʻano molekala: C5H9NO. ʻO N-methylpyrrolidone kahi wai ʻala ammonia iki i hui pū ʻia me ka wai ma kekahi ʻano a ua aneane hui pū ʻia me nā mea hoʻoheheʻe āpau (ethanol, acetaldehyde, ketone, aromatic hydrocarbon, a pēlā aku). ʻO ke kiko paila o 204 ° C, kahi kiko flash o 95 ° C. ʻO NMP kahi mea hoʻoheheʻe aprotic polar me ka haʻahaʻa haʻahaʻa, ke kiko paila kiʻekiʻe, solubility maikaʻi loa, selectivity a me ke kūpaʻa. Hoʻohana nui ʻia i ka unuhi ʻala; hoʻomaʻemaʻe ʻana o ka acetylene, olefins, diolefins. ʻO ka mea hoʻoheheʻe i hoʻohana ʻia no ka polymer a me ke kikowaena no ka polymerization e hoʻohana ʻia nei i kā mākou hui no NMP-002-02, me ka maʻemaʻe o >99.8%, kahi kaumaha kikoʻī o 1.025 ~ 1.040, a me ka nui o ka wai o <0.005% (500ppm).

PVDF (polyvinylidene fluoride): hoʻohana ʻia ma ke ʻano he mea hoʻomānoanoa a me ka mea hoʻopaʻa. He polymer crystalline pauka keʻokeʻo me ka nui o 1.75 a 1.78. Loaʻa iā ia ke kūpaʻa UV maikaʻi loa a me ke kūpaʻa ʻana i ka wā, a ʻaʻole paʻakikī a nahā kona kiʻiʻoniʻoni ma hope o ke kau ʻia ʻana i waho no hoʻokahi a ʻelua paha mau makahiki. He kikoʻī nā waiwai dielectric o ka polyvinylidene fluoride, ʻo ke kūpaʻa dielectric he 6-8 (MHz ~ 60Hz), a he nui nō hoʻi ka tangent pohō dielectric, ma kahi o 0.02 ~ 0.2, a he haʻahaʻa iki ke kūpaʻa leo, ʻo ia hoʻi 2 × 1014ΩNaN. ʻO kona mahana hoʻohana lōʻihi he -40 ° C ~ +150 ° C, ma kēia pae mahana, he maikaʻi nā waiwai mechanical o ka polymer. Loaʻa iā ia ka mahana hoʻololi aniani o -39 ° C, kahi mahana embrittlement o -62 ° C a i ʻole ka liʻiliʻi, kahi kiko heheʻe kristal ma kahi o 170 ° C, a me ka mahana decomposition thermal o 316 ° C a i ʻole.

Ke kaʻina hana hoʻoulu a me ka uhi ʻana o ka Cathode:

7. Nā ʻano viscosity o ka slurry

1. Ka piʻo o ka mānoanoa slurry me ka manawa hoʻoulu

I ka hoʻolōʻihi ʻia ʻana o ka manawa hoʻoulu, ʻo ke ʻano o ka viscosity o ka slurry he waiwai paʻa me ka loli ʻole (hiki ke ʻōlelo ʻia ua hoʻopuehu like ʻia ka slurry).

2. Ka piʻo o ka mānoanoa slurry me ka mahana

ʻO ke kiʻekiʻe o ka mahana, ʻo ka haʻahaʻa o ka viscosity o ka slurry, a ʻo ka viscosity ke ʻano i kahi waiwai paʻa ke hiki i kahi mahana.

3. Ka piʻo o ka ʻike paʻa o ka slurry pahu hoʻoili me ka manawa

Ma hope o ka hoʻoulu ʻia ʻana o ka slurry, ua paipu ʻia i ka pahu hoʻoili no ka uhi ʻana o Coater. Hoʻoulu ʻia ka pahu hoʻoili e hoʻohuli: 25Hz (740RPM), hoʻohuli: 35Hz (35RPM) e hōʻoia i ka paʻa o nā palena o ka slurry a ʻaʻole e loli, me ka pulp. ʻO ka mahana o ka mea, ka mānoanoa a me ka ʻike paʻa e hōʻoia i ka like o ka uhi slurry.

4, ka mānoanoa o ka slurry me ka piʻo manawa