Monga chomangira chachikulu chamagetsi opangira madzi opangira ma electrode, zinthu za CMC zimagwiritsidwa ntchito kwambiri ndi opanga mabatire apanyumba ndi akunja. Kuchuluka koyenera kwa binder kumatha kupeza mphamvu ya batri yayikulu, moyo wautali komanso kukana kwamkati.
Binder ndi imodzi mwazinthu zofunikira zothandizira mu mabatire a lithiamu-ion. Ndilo gwero lalikulu lazinthu zamakina a elekitirodi yonse ndipo zimakhudza kwambiri pakupanga ma elekitirodi ndi magwiridwe antchito amagetsi a batri. Binder yokha ilibe mphamvu ndipo imakhala ndi gawo laling'ono kwambiri mu batri.
Kuphatikiza pa zomatira za omangira ambiri, zida za lithiamu-ion batire electrode binder zimafunikanso kupirira kutupa ndi dzimbiri la electrolyte, komanso kupirira dzimbiri la electrochemical pakuwongolera ndi kutulutsa. Imakhalabe yokhazikika pamagetsi ogwira ntchito, kotero palibe zida zambiri za polima zomwe zingagwiritsidwe ntchito ngati zomangira ma elekitirodi kwa mabatire a lithiamu-ion.
Pali mitundu itatu ikuluikulu ya ma batire a lithiamu-ion omwe amagwiritsidwa ntchito kwambiri pakali pano: polyvinylidene fluoride (PVDF), styrene-butadiene rabara (SBR) emulsion ndi carboxymethyl cellulose (CMC). Kuphatikiza apo, polyacrylic acid (PAA), zomangira madzi okhala ndi polyacrylonitrile (PAN) ndi polyacrylate monga zigawo zazikuluzikulu zimagwiranso ntchito pamsika wina.
Makhalidwe anayi a CMC ya mulingo wa batri
Chifukwa cha kusasungunuka kwamadzi kwa asidi a carboxymethyl cellulose, kuti agwiritse ntchito bwino, CMC ndi chinthu chomwe chimagwiritsidwa ntchito kwambiri popanga batire.
Monga chomangira chachikulu chamagetsi opangira madzi opangira ma electrode, zinthu za CMC zimagwiritsidwa ntchito kwambiri ndi opanga mabatire apanyumba ndi akunja. Kuchuluka koyenera kwa binder kumatha kupeza mphamvu ya batri yayikulu, moyo wautali komanso kukana kwamkati.
Makhalidwe anayi a CMC ndi:
Choyamba, CMC akhoza kupanga mankhwala hydrophilic ndi sungunuka, kwathunthu sungunuka m'madzi, popanda ulusi ufulu ndi zosafunika.
Chachiwiri, mlingo wolowa m'malo ndi yunifolomu ndipo mamasukidwe ake ndi okhazikika, omwe angapereke kukhuthala kokhazikika ndi kumamatira.
Chachitatu, pangani mankhwala oyeretsedwa kwambiri okhala ndi ayoni otsika achitsulo.
Chachinayi, mankhwalawa amagwirizana bwino ndi SBR latex ndi zipangizo zina.
CMC sodium carboxymethyl cellulose yomwe imagwiritsidwa ntchito mu batire yasintha bwino momwe imagwiritsidwira ntchito, ndipo nthawi yomweyo imapereka magwiridwe antchito abwino, ndikugwiritsa ntchito pano.
Udindo wa CMC mu mabatire
CMC ndi carboxymethylated yochokera ku cellulose, yomwe nthawi zambiri imakonzedwa pochita ma cellulose achilengedwe ndi caustic alkali ndi monochloroacetic acid, ndipo kulemera kwake kwa ma cell kumayambira masauzande ambiri mpaka mamiliyoni.
CMC ndi ufa woyera mpaka kuwala wachikasu, granular kapena fibrous substance, yomwe imakhala ndi hygroscopicity yamphamvu ndipo imasungunuka mosavuta m'madzi. Ikakhala yopanda ndale kapena yamchere, yankho lake ndimadzimadzi owoneka bwino kwambiri. Ngati yatenthedwa pamwamba pa 80 ℃ kwa nthawi yayitali, kukhuthala kumachepa ndipo sikudzasungunuka m'madzi. Imasanduka bulauni ikatenthedwa kufika 190-205°C, ndipo imatulutsa carbonize ikatenthedwa kufika 235-248°C.
Chifukwa CMC ali ndi ntchito za thickening, kugwirizana, kasungidwe madzi, emulsification ndi kuyimitsidwa mu njira amadzimadzi, ndi chimagwiritsidwa ntchito m'minda za ceramics, chakudya, zodzoladzola, kusindikiza ndi utoto, papermaking, nsalu, zokutira, zomatira ndi mankhwala, mkulu- mapeto a ceramics ndi mabatire a lithiamu The field account for about 7%, yomwe imadziwika kuti "industrial monosodium glutamate".
MwachindunjiCMCmu batri, ntchito za CMC ndi: kubalalitsa zoipa elekitirodi yogwira zinthu ndi conductive wothandizira; thickening ndi odana ndi sedimentation zotsatira zoipa elekitirodi slurry; chithandizo cha kugwirizana; kukhazikika kwa magwiridwe antchito a electrode ndikuthandizira kuwongolera magwiridwe antchito a batri; onjezerani mphamvu ya peel ya chidutswa cha pole, etc.
Kuchita ndi kusankha kwa CMC
Kuwonjezera CMC pamene kupanga elekitirodi slurry akhoza kuonjezera mamasukidwe akayendedwe a slurry ndi kuteteza slurry kukhazikika. CMC idzawola ayoni a sodium ndi anions mu njira yamadzimadzi, ndipo kukhuthala kwa guluu wa CMC kudzachepa ndi kuwonjezeka kwa kutentha, komwe kumakhala kosavuta kuyamwa chinyezi ndipo kumakhala kosavuta.
CMC akhoza kutenga mbali yabwino kwambiri mu kubalalitsidwa zoipa elekitirodi graphite. Pamene kuchuluka kwa CMC ukuwonjezeka, mankhwala ake kuwonongeka adzakhala kutsatira pamwamba pa particles graphite, ndi tinthu tating'onoting'ono graphite kuthamangitsa wina ndi mzake chifukwa cha mphamvu electrostatic, kukwaniritsa wabwino kubalalitsidwa kwenikweni.
Choyipa chodziwikiratu cha CMC ndikuti ndizovuta. Ngati CMC yonse ikugwiritsidwa ntchito ngati chomangira, ma elekitirodi a graphite negative adzagwa panthawi ya kukanikiza ndi kudula kwa chidutswa cha mzati, zomwe zidzawononge kwambiri ufa. Panthawi imodzimodziyo, CMC imakhudzidwa kwambiri ndi chiŵerengero cha zipangizo zamagetsi ndi pH mtengo, ndipo pepala la electrode likhoza kusweka panthawi yolipiritsa ndi kutulutsa, zomwe zimakhudza mwachindunji chitetezo cha batri.
Poyambirira, chomangira chomwe chimagwiritsidwa ntchito poyambitsa ma elekitirodi olakwika chinali PVDF ndi zomangira zina zozikidwa pamafuta, koma poganizira zachitetezo cha chilengedwe ndi zinthu zina, zakhala zofala kugwiritsa ntchito zomangira zamadzi pama electrode olakwika.
Binder wangwiro kulibe, yesetsani kusankha binder yomwe imakwaniritsa zofunikira zakuthupi ndi electrochemical. Ndi chitukuko cha teknoloji ya batri ya lithiamu, komanso mtengo ndi chitetezo cha chilengedwe, zomangira madzi zidzalowa m'malo mwa zomangira mafuta.
CMC njira ziwiri zazikulu zopangira
Malinga ndi ma media osiyanasiyana etherification, kupanga mafakitale a CMC kumatha kugawidwa m'magulu awiri: njira yopangira madzi ndi njira yosungunulira. Njira yogwiritsira ntchito madzi monga njira yochitiramo imatchedwa njira yamadzi sing'anga, yomwe imagwiritsidwa ntchito popanga zamchere zamchere ndi CMC yapakatikati. Njira yogwiritsira ntchito zosungunulira organic monga sing'anga anachita amatchedwa zosungunulira njira, amene ali oyenera kupanga sing'anga ndi mkulu-kalasi CMC. Zochita ziwirizi zimachitika mu kneader, yomwe ndi njira yokanda ndipo ndiyo njira yayikulu yopangira CMC.
Njira yapakatikati yamadzi: njira yopangira mafakitale kale, njirayo ndikuchitapo kanthu pa cellulose yamchere ndi etherification wothandizira pansi pazikhalidwe za alkali yaulere ndi madzi, yomwe imagwiritsidwa ntchito pokonzekera zinthu zapakatikati ndi zotsika za CMC, monga zotsukira ndi zopangira nsalu Dikirani. . Ubwino wa njira yapakati pamadzi ndikuti zofunikira za zida ndizosavuta komanso mtengo wake ndi wotsika; kuipa ndi chifukwa chosowa kuchuluka kwa madzi sing'anga, kutentha kwaiye ndi zimene kumawonjezera kutentha ndi Iyamba Kuthamanga liwiro la mbali zimachitikira, chifukwa otsika etherification dzuwa ndi osauka mankhwala khalidwe.
Njira yosungunulira; amadziwikanso kuti organic zosungunulira njira, iwo anawagawa mu ukakanda njira ndi slurry njira malinga ndi kuchuluka anachita diluent. Mbali yake yayikulu ndi yakuti alkalization ndi etherification zimachitikira pansi pa chikhalidwe cha zosungunulira organic monga anachita sing'anga (diluent) wa. Monga momwe zimachitikira njira yamadzi, njira yosungunulira ilinso ndi magawo awiri a alkalization ndi etherification, koma sing'anga yamagawo awiriwa ndi yosiyana. Ubwino wa njira zosungunulira ndikuti zimasiya njira zowukira zamchere, kukanikiza, kuphwanya, ndi kukalamba komwe kumachitika munjira yamadzi, ndipo alkalization ndi etherification zonse zimachitika mu kneader; choyipa ndi chakuti kutentha kwa kutentha kumakhala kocheperako, ndipo zofunikira za malo ndizochepa. , mtengo wapamwamba.
Nthawi yotumiza: Jan-05-2023