Sengoliloeng sena se hlahlobiloe ho latela mekhoa le maano a bohlophisi ba Science X. Bahlophisi ba totobalitse litšoaneleho tse latelang ha ba ntse ba netefatsa botšepehi ba litaba:
Libetri tsa lithium-ion tse litšila tse tsoang mehalang ea cellular, lilaptop le palo e ntseng e eketseha ea likoloi tsa motlakase lia bokellana, empa likhetho tsa ho li sebelisa li ntse li lekanyelitsoe ho chesoa kapa ho qhala libeteri tse hlolehileng ka lik'hemik'hale. Mekhoa ea hona joale e ka baka mathata a tikoloho 'me ho thata ho hlahisa moruo ka tekanyo ea indasteri.
Mekhoa ea setso e sebelisa hape lisebelisoa tse ling tsa betri 'me e itšetleha ka li-alkali tsa caustic, li-inorganic acid le lik'hemik'hale tse kotsi tse ka hlahisang litšila. Ho ntša litšepe tsa bohlokoa ho boetse ho hloka karohano e rarahaneng le pula. Leha ho le joalo, ho nchafatsa litšepe tse kang cobalt le lithium ho ka fokotsa tšilafalo, ho itšetleha ka mehloli ea kantle le ho koala liketane tsa phepelo.
Bafuputsi Lefapheng la Matla la United States la Oak Ridge National Laboratory ba ntlafalitse mokhoa oa ho qhibiliha ha libeteri ka mokelikeli oa metsi ho fokotsa bongata ba lik'hemik'hale tse kotsi tse sebelisoang ts'ebetsong. Lipatlisiso tsa bona li ile tsa hatisoa koranteng ea Energy Storage Materials.
Tharollo e bonolo, e sebetsang le e baballang tikoloho e ntlafalitsoeng ke bafuputsi ba ORNL e hlola litšitiso tse kholo tse kopaneng le mekhoa e fetileng.
Libetri tse sebelisitsoeng li kolobisoa ka motsoako oa organic citric acid (ka tlhaho e fumanoang litholoana tsa citrus) e qhibilihisitsoeng ka har'a ethylene glycol, antifreeze e sebelisoang hangata lihlahisoa tsa bareki tse kang lipente le litlolo. Citric acid e tsoa mehloling e tsitsitseng mme e bolokehile ho sebetsana le li-inorganic acid. Tharollo ena e baballang tikoloho e fana ka ts'ebetso e matla haholo ea ho arola le ho e sebelisa hape ka har'a eleketrode e nang le tjhaji e ntle ea betri, e bitsoang cathode.
"Hobane cathode e na le lisebelisoa tsa bohlokoa, ke karolo e theko e boima ka ho fetisisa ea betri leha e le efe, e ikarabellang ho feta karolo ea 30 lekholong ea litšenyehelo tsa eona," ho boletse Yaokai Bai, setho sa sehlopha sa lipatlisiso tsa betri ea ORNL. "Mokhoa oa rona o ka fokotsa litšenyehelo tsa betri ha nako e ntse e ea." Boithuto bona bo entsoe setsing sa tlhahiso ea betri ea Oak Ridge National Laboratory, e leng setsi se seholo ka ho fetisisa sa lipatlisiso le nts'etsopele ea libeteri tse bulehileng United States.
Theknoloji ea ts'ebetso e entsoeng moo e lumella hoo e ka bang 100% ea cobalt le lithium hore e tlosoe ka har'a cathode ntle le ho kenya litšila tsamaisong. E boetse e khona ho arola ka katleho tharollo ea tšepe ho tloha masala a mang. Habohlokoa le ho feta, mosebetsi oa eona oa bobeli ke ho hlaphoheloa ho feta 96% ea cobalt nakong ea lihora tse 'maloa ntle le ho eketsa lik'hemik'hale tse eketsehileng, tseo hangata e leng mokhoa o rarahaneng oa ho leka-lekanya maemo a acid.
"Lena ke lekhetlo la pele hore tsamaiso e le 'ngoe ea tharollo e akaretsa mesebetsi ea ho leaching le ho e lokisa," ho boletse mofuputsi ea ka sehloohong Lu Yu. "Ho ne ho thahasellisa ho fumana hore cobalt e ile ea lla 'me ea lula ntle le tšitiso e 'ngoe. Re ne re sa lebella sena."
Ho felisa tlhokahalo ea lik'hemik'hale tse eketsehileng ho fokotsa litšenyehelo le ho qoba tlhahiso ea lihlahisoa kapa litšila tsa bobeli. "Re thabile hore ebe ts'ebetso ena ea ho nchafatsa lintho e entsoeng ke bo-ramahlale ba rona e ka bula tsela ea ho sebelisoa hape ha lisebelisoa tsa bohlokoa tsa betri," ho boletse Ilyas Belharouaq, mofuputsi oa likhoebo le motsamaisi oa Karolo ea Motlakase ho Oak Ridge National Laboratory.
Bai o re thepa ea leaching ea citric acid le ethylene glycol e kile ea ithutoa pele, empa mokhoa ona o sebelisitse acid e ngata le mocheso o tlaase 'me o ne o sa sebetse hantle.
Bai o itse: "Re ile ra makatsoa ke hore na e ile ea tsoa tharollong kapele hakae. Ka li-organic acid hangata ho nka lihora tse 10 ho isa ho tse 12, empa sena se nka hora feela. Litharollo tsa setso tse sebelisang li-inorganic acid le tsona li lieha hobane li na le metsi, ao ntlha ea eona e belang e thibelang mocheso oa ho arabela.
Lintlha tse ling: Lu Yu et al., Karohano e sebetsang hantle le pula e kopanetsoeng bakeng sa ho sebelisa li-cathode tse nolofalitsoeng, Lisebelisoa tsa Polokelo ea Matla (2023). DOI: 10.1016/j.ensm.2023.103025
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