Ma ke ʻano he mea hoʻopaʻa nui o nā mea electrode maikaʻi ʻole i ka wai, hoʻohana nui ʻia nā huahana CMC e nā mea hana pākaukau kūloko a me nā haole. Hiki ke loaʻa i ka nui o ka binder ka nui o ka mana pākaukau, ke ola pōʻai lōʻihi a me ke kūpaʻa haʻahaʻa o loko.
ʻO Binder kekahi o nā mea hana kōkua koʻikoʻi i nā pākahi lithium-ion. ʻO ia ke kumu nui o nā waiwai mechanical o ka electrode holoʻokoʻa a he hopena koʻikoʻi i ke kaʻina hana o ka electrode a me ka hana electrochemical o ka pā. ʻAʻole hiki i ka mea hoʻopili ponoʻī a noho i kahi hapa liʻiliʻi loa i loko o ka pākaukau.
Ma waho aʻe o nā waiwai adhesive o nā mea hoʻopili maʻamau, pono nō hoʻi ka lithium-ion battery electrode binder material e hiki ke kū i ka pehu a me ka corrosion o ka electrolyte, a me ka pale ʻana i ka corrosion electrochemical i ka wā o ka hoʻouka ʻana a me ka hoʻokuʻu ʻana. Noho paʻa ia i ka laina voli hana, no laila ʻaʻole nui nā mea polymer i hiki ke hoʻohana ʻia e like me nā mea hoʻopili electrode no nā pā lithium-ion.
ʻEkolu mau ʻano nui o nā mea hoʻopaʻa pākahi lithium-ion i hoʻohana nui ʻia i kēia manawa: polyvinylidene fluoride (PVDF), styrene-butadiene rubber (SBR) emulsion a me carboxymethyl cellulose (CMC). Eia kekahi, ʻo ka polyacrylic acid (PAA), nā mea hoʻopili wai me ka polyacrylonitrile (PAN) a me ka polyacrylate e like me nā mea nui e noho ana i kekahi mākeke.
ʻEhā mau hiʻohiʻona o ka CMC pae pākaukau
Ma muli o ka maikaʻi ʻole o ka hoʻoheheʻe wai o ke ʻano waika o carboxymethyl cellulose, i mea e hoʻopili maikaʻi ai, ʻo CMC kahi mea i hoʻohana nui ʻia i ka hana pākaukau.
Ma ke ʻano he mea hoʻopaʻa nui o nā mea electrode maikaʻi ʻole i ka wai, hoʻohana nui ʻia nā huahana CMC e nā mea hana pākaukau kūloko a me nā haole. Hiki ke loaʻa i ka nui o ka binder ka nui o ka mana pākaukau, ke ola pōʻai lōʻihi a me ke kūpaʻa haʻahaʻa o loko.
ʻO nā hiʻohiʻona ʻehā o CMC:
ʻO ka mea mua, hiki i ka CMC ke hana i ka huahana hydrophilic a hiki ke hoʻoheheʻe ʻia, hiki ke hoʻoheheʻe ʻia i ka wai, me ka ʻole o nā pulupulu manuahi a me nā haumia.
ʻO ka lua, ʻo ke ʻano o ka hoʻololi ʻana he kūlike a paʻa ka viscosity, hiki ke hāʻawi i ka viscosity paʻa a me ka adhesion.
ʻO ke kolu, e hana i nā huahana maʻemaʻe kiʻekiʻe me ka haʻahaʻa haʻahaʻa.
ʻO ka hā, ua kūpono ka huahana me ka SBR latex a me nā mea ʻē aʻe.
ʻO ka CMC sodium carboxymethyl cellulose i hoʻohana ʻia i loko o ka pākaukau ua hoʻomaikaʻi maikaʻi ʻia kona hopena hoʻohana, a ma ka manawa like e hāʻawi iā ia i ka hana hoʻohana maikaʻi, me ka hopena hoʻohana o kēia manawa.
ʻO ke kuleana o CMC i nā pihi
CMC mea he carboxymethylated derivative o cellulose, ka mea maʻamau i hoomakaukauia ma ka reacting maoli cellulose me ka caustic alkali a me ka monochloroacetic waika, a me kona molekala kaumaha pae mai na tausani a i miliona.
ʻO ka CMC he keʻokeʻo a ʻulaʻula melemele ka pauka, granular a fibrous waiwai, nona ka hygroscopicity ikaika a hiki ke hoʻoheheʻe ʻia i ka wai. Ke kū ʻole a alkaline paha, ʻo ka hopena he wai viscosity kiʻekiʻe. Inā hoʻomehana ʻia ma luna o 80 ℃ no ka manawa lōʻihi, e emi ana ka viscosity a ʻaʻole hiki ke hoʻoheheʻe ʻia i ka wai. Huli ʻeleʻele i ka wā i wela ai i 190-205°C, a i carbonize i ka wā i wela ai i 235-248°C.
Ma muli o ka CMC i nā hana o ka mānoanoa, hoʻopaʻa ʻana, paʻa wai, emulsification a me ka hoʻokuʻu ʻana i ka wai wai, ua hoʻohana nui ʻia ia i nā kula o nā ceramics, nā meaʻai, nā mea hoʻonaninani, ka paʻi ʻana a me ka waihoʻoluʻu, ka hana ʻana i ka pepa, nā textiles, nā uhi, adhesives a me nā lāʻau lapaʻau, kiʻekiʻe- hoʻopau i nā ceramics a me nā pā lithium E pili ana ka mahina ma kahi o 7%, i kapa ʻia ʻo "industrial monosodium glutamate".
KūkākūkāCMCi ka pākaukau, nā hana o ka CMC: ka hoʻopuehu ʻana i ka mea hana electrode maikaʻi ʻole a me ka mea hana conductive; ka mānoanoa a me ka anti-sedimentation hopena ma ka electrode slurry; kōkua i ka hoʻopaʻa ʻana; hoʻopaʻa i ka hana hana o ka electrode a me ke kōkua ʻana i ka hoʻomaikaʻi ʻana i ka pōʻaiapili pākaukau. hoʻomaikaʻi i ka ikaika peel o ka ʻāpana pole, etc.
Ka hana a me ke koho ʻana o CMC
ʻO ka hoʻohui ʻana i ka CMC i ka wā e hana ai i ka slurry electrode hiki ke hoʻonui i ka viscosity o ka slurry a pale i ka slurry mai ka hoʻopaʻa ʻana. E hoʻoheheʻe ʻo CMC i nā ion sodium a me nā anion i loko o ka wai wai, a e emi iho ka viscosity o ka CMC glue me ka piʻi ʻana o ka mahana, kahi maʻalahi e hoʻomoʻa i ka makū a me ka elasticity maikaʻi ʻole.
Hiki i ka CMC ke hana maikaʻi loa i ka hoʻopuehu ʻana o ka graphite electrode maikaʻi ʻole. Ke piʻi aʻe ka nui o ka CMC, e pili ana kāna mau huahana decomposition i ka ʻili o nā ʻāpana graphite, a e hoʻihoʻi nā ʻāpana graphite kekahi i kekahi ma muli o ka ikaika electrostatic, e loaʻa ana ka hopena dispersion maikaʻi.
ʻO ka hemahema o ka CMC ʻo ia ka palupalu. Inā hoʻohana ʻia nā CMC āpau e like me ka mea hoʻopili, e hāʻule ka graphite negative electrode i ka wā o ke kaomi ʻana a me ke ʻoki ʻana o ka ʻāpana pole, kahi e lilo ai ka pauda koʻikoʻi. I ka manawa like, pili nui ʻia ka CMC e ka ratio o nā mea electrode a me ka waiwai pH, a hiki i ka pepa electrode ke haki i ka wā o ka hoʻouka ʻana a me ka hoʻokuʻu ʻana, e pili pono ana i ka palekana o ka pā.
I ka hoʻomaka ʻana, ʻo ka mea hoʻopili i hoʻohana ʻia no ka hoʻoulu ʻana i ka electrode maikaʻi ʻole ʻo PVDF a me nā mea hoʻopaʻa ʻaila ʻē aʻe, akā no ka noʻonoʻo ʻana i ka mālama ʻana i ke kaiapuni a me nā mea ʻē aʻe, ua lilo ia i mea maʻamau e hoʻohana i nā mea hoʻopili wai no nā electrodes maikaʻi ʻole.
ʻAʻole i loaʻa ka mea hoʻopili kūpono, e hoʻāʻo e koho i kahi binder e hoʻokō i ka hoʻoponopono kino a me nā koi electrochemical. Me ka hoʻomohala ʻana o ka ʻenehana ʻenehana lithium, a me nā kumu kūʻai a me nā pilikia palekana o ke kaiapuni, e hoʻololi hope nā mea hoʻopili wai i nā mea hoʻopaʻa ʻaila.
ʻO CMC ʻelua kaʻina hana nui
Wahi a nā media etherification ʻē aʻe, hiki ke hoʻokaʻawale ʻia ka hana ʻenehana o CMC i ʻelua mau ʻāpana: ke ʻano wai a me ke ʻano solvent. ʻO ke ʻano o ka hoʻohana ʻana i ka wai e like me ke ʻano o ka hopena i kapa ʻia ʻo ke ʻano ʻano wai, i hoʻohana ʻia e hana i ka medium alkaline a me ka CMC haʻahaʻa haʻahaʻa. ʻO ke ʻano o ka hoʻohana ʻana i ka mea hoʻoheheʻe organik e like me ke ʻano o ka hopena i kapa ʻia ke ʻano solvent, kūpono ia no ka hana ʻana o ka CMC kiʻekiʻe a me ke kiʻekiʻe. Lawe ʻia kēia mau ʻano ʻelua i loko o kahi kneader, nona ke kaʻina kneading a ʻo ia ke ala nui no ka hana ʻana i ka CMC.
ʻO ke kaʻina hana wai: kahi kaʻina hana ʻoihana mua, ʻo ke ʻano o ka hana ʻana i ka cellulose alkali a me ka etherification agent ma lalo o nā kūlana o ka alkali manuahi a me ka wai, kahi i hoʻohana ʻia e hoʻomākaukau ai i nā huahana CMC waena a me nā haʻahaʻa haʻahaʻa, e like me nā detergents a me ka textile sizing agents. . ʻO ka pōmaikaʻi o ke ʻano wai wai ʻo ia ka maʻalahi o nā pono o nā mea hana a he haʻahaʻa ke kumukūʻai; ʻO ka hemahema ma muli o ka nele o ka nui o ka wai, ʻo ka wela i hana ʻia e ka hopena e hoʻonui ai i ka mahana a hoʻonui i ka wikiwiki o nā hopena ʻaoʻao, e hopena i ka haʻahaʻa haʻahaʻa etherification a me ka maikaʻi ʻole o ka huahana.
ʻO keʻano solvent; ʻike pū ʻia ʻo ke ʻano solvent organik, ua māhele ʻia i ke ʻano kneading a me ke ʻano slurry e like me ka nui o ka hopena diluent. ʻO kāna hiʻohiʻona nui ʻo ia ka alkaliization a me ka etherification reactions i lawe ʻia ma lalo o ke ʻano o kahi mea hoʻoheheʻe organik e like me ke ʻano pane (diluent) o. E like me ke kaʻina hana o ke ʻano wai, ʻelua mau ʻanuʻu o ka alkalization a me ka etherification ke ʻano o ka solvent, akā ʻokoʻa ke ʻano o kēia mau pae ʻelua. ʻO ka pōmaikaʻi o ke ʻano solvent, ʻo ia ka haʻalele ʻana i nā kaʻina hana o ka soking alkali, kaomi ʻana, ʻokiʻoki, a me ka ʻelemakule i loko o ke ʻano wai, a ua lawe ʻia ka alkalization a me ka etherification i loko o ka kneader; ʻO ka hemahema, ʻo ka mālama ʻana i ka mahana he ʻilihune, a he ʻilihune nā koi o ka lumi. ,ʻoi aku ke kumu kūʻai.
Ka manawa hoʻouna: Jan-05-2023