Baenjineri ba thehile searohano se tiisang li-electrolyte tsa gaseous ho etsa hore libeteri tsa mocheso o tlase haholo li bolokehe.

Ho ea ka litlaleho tsa mecha ea litaba ea linaheng tse ling, baenjiniere ba nano Univesithing ea California San Diego ba thehile separator ea betri e ka sebetsang e le mokoallo pakeng tsa cathode le anode ho thibela electrolyte ea gaseous ka betri ho tloha mouoane. Diaphragm e ncha e thibela khatello ea ka hare ea sefefo ho bokellana, kahoo e thibela betri ho ruruha le ho phatloha.

Moetapele oa lipatlisiso, Zheng Chen, moprofesa oa nanoengineering Sekolong sa Jacobs sa Boenjiniere Univesithing ea California, San Diego, o itse: "Ka ho tšoasa limolek'hule tsa khase, lera le ka sebetsa e le mokhoa oa ho tsitsisa li-electrolyte tse sa tsitsang."

Karohano e ncha e ka ntlafatsa ts'ebetso ea betri ka mocheso o tlase haholo. Sele ea betri e sebelisang diaphragm e ka sebetsa ho minus 40 ° C, 'me matla a ka ba holimo ho lihora tse 500 milliampere ka gram, ha betri ea diaphragm ea khoebo e batla e le lefela tabeng ena. Bafuputsi ba re le haeba e ka tloheloa ka likhoeli tse peli e sa sebelisoe, matla a betri a ntse a le holimo. Tshebetso ena e bontša hore diaphragm e ka boela ea lelefatsa bophelo ba polokelo. Tšibollo ena e lumella bafuputsi ho finyella sepheo sa bona ho ea pele: ho hlahisa libeteri tse ka fanang ka motlakase bakeng sa likoloi tse sebakeng se leqhoa, tse kang lifofa-sebakeng, lisathelaete le likepe tse tebileng tsa leoatle.

Patlisiso ena e thehiloe phuputsong e entsoeng laboratoring ea Ying Shirley Meng, moprofesa oa nanoengineering Univesithing ea California, San Diego. Patlisiso ena e sebelisa electrolyte ea khase e nang le mokelikeli o itseng ho hlahisa beteri e ka bolokang ts'ebetso e ntle sebakeng se ka tlase ho 60°C lekgetlo la pele. Har'a tsona, electrolyte ea khase ea liquefied ke khase e qhibilihang ka ho sebelisa khatello 'me e hanyetsana le mocheso o tlase ho feta li-electrolyte tse tloaelehileng tsa mokelikeli.

Empa mofuta ona oa electrolyte o na le sekoli; ho bonolo ho fetoha ho tloha ho metsi ho ea ho khase. Chen o itse: "Bothata bona ke taba e kholo ka ho fetisisa ea tšireletso bakeng sa electrolyte ena." Khatello e hloka ho eketseha ho fokotsa limolek'hule tsa metsi le ho boloka electrolyte e le boemong ba mokelikeli ho sebelisa electrolyte.

Laboratori ea Chen e sebelisane le Meng le Tod Pascal, moprofesa oa nanoengineering Univesithing ea California, San Diego, ho rarolla bothata bona. Ka ho kopanya tsebo ea litsebi tsa k'homphieutha tse kang Pascal le bafuputsi ba kang Chen le Meng, ho entsoe mokhoa oa ho qhibilihisa electrolyte ea mouoane ntle le ho sebelisa khatello e ngata ka potlako. Basebetsi ba boletsoeng ka holimo ba ikopantseng le Setsi sa Patlisiso ea Boitsebiso le Setsi sa Boenjiniere (MRSEC) sa Univesithi ea California, San Diego.

Mokhoa ona o alima ketsahalong eo ho eona limolek'hule tsa khase li kopanang ka botsona ha li qabeletsoe libakeng tse nyane tsa nano-scale. Ketsahalo ena e bitsoa capillary condensation, e ka etsang hore khase e be metsi ka khatello e tlaase. Sehlopha sa lipatlisiso se sebelisitse ketsahalo ena ho theha sepharoli sa betri se khonang ho tsitsisa electrolyte ka libeteri tsa mocheso o tlase haholo, e leng electrolyte ea khase e entsoeng ka khase ea fluoromethane. Bafuputsi ba ile ba sebelisa thepa ea kristale e nang le porous e bitsoang metal-organic framework (MOF) ho etsa lera. Ntho e ikhethang ka MOF ke hore e tletse li-pores tse nyane, tse ka tšoasang limolek'hule tsa khase ea fluoromethane le ho li kopanya ka khatello e batlang e le tlase. Mohlala, fluoromethane hangata e honyela ho minus 30 ° C mme e na le matla a 118 psi; empa haeba MOF e sebelisoa, khatello ea condensation ea porous ka mocheso o tšoanang ke 11 psi feela.

Chen o itse: "MOF ena e fokotsa haholo khatello e hlokahalang hore electrolyte e sebetse. Ka hona, betri ea rona e ka fana ka matla a mangata ka mocheso o tlaase ntle le ho senyeha. " Bafuputsi ba ile ba leka karohano e thehiloeng ho MOF ka betri ea lithium-ion. . Betri ea lithium-ion e na le cathode ea fluorocarbon le anode ea tšepe ea lithium. E ka e tlatsa ka electrolyte ea gaseous fluoromethane ka khatello e ka hare ea 70 psi, e tlaase haholo ho feta khatello e hlokahalang bakeng sa ho qhibilihisa fluoromethane. Betri e ntse e ka boloka 57% ea mocheso oa kamore ea eona ka tlase ho 40°C. Ka lehlakoreng le leng, ka mocheso le khatello e tšoanang, matla a betri ea diaphragm ea khoebo e sebelisang electrolyte ea gaseous e nang le fluoromethane e batla e le zero.

Li-micropores tse thehiloeng ho karohano ea MOF ke tsona tsa bohlokoa hobane li-micropores tsena li ka boloka li-electrolyte tse ngata li phalla ka betri esita le tlas'a khatello e fokotsehileng. Diaphragm ea khoebo e na le li-pores tse kholo 'me ha e khone ho boloka limolek'hule tsa gaseous electrolyte tlas'a khatello e fokotsehileng. Empa microporosity hase lona feela lebaka la hore diaphragm e sebetse hantle tlas'a maemo ana. Diaphragm e entsoeng ke bafuputsi e boetse e lumella li-pores hore li thehe tsela e tsoelang pele ho tloha pheletsong e 'ngoe ho ea ho e' ngoe, kahoo ho etsa bonnete ba hore li-ion tsa lithium li ka phalla ka bolokolohi ka diaphragm. Tekong, conductivity ea ionic ea betri e sebelisang diaphragm e ncha ka ho tlosa 40 ° C ke makhetlo a leshome a betri e sebelisang diaphragm ea khoebo.

Sehlopha sa Chen hajoale se ntse se leka li-separators tse thehiloeng ho MOF ho li-electrolyte tse ling. Chen o itse: "Re bone liphello tse tšoanang. Ka ho sebelisa MOF ena e le stabilizer, limolek'hule tse sa tšoaneng tsa electrolyte li ka ba adsorbed ho ntlafatsa ts'ireletso ea betri, ho kenyelletsa le libeteri tsa setso tsa lithium tse nang le electrolyte tse sa tsitsang."