Ingabe impilo yebhethri ye-lithium ion inganwetshwa ukuze kwengezwe isici se-hydrogen?

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Lieferant von tragbaren Kraftwerken

Abacwaningi beRaunns Rifo Moore National Laboratory (LLNL) bathole ukuthi umthamo webhethri ungathuthukiswa kakhulu inqobo nje uma i-hydrogen element yengezwa kuma-electrode ebhethri ye-lithium-ion, ezonweba isikhathi sokusebenza futhi isheshise imisebenzi yokudlulisela. Ibhethri ye-lithium ion iwuhlobo lwebhethri elishajekayo, futhi i-ion ye-lithium iyasuswa isuka ebhethrini iye ku-electrode ephozithivu ngesikhathi ikhishwa, futhi i-ion ye-lithium ye-electrode ephozithivu ibuyiselwa emuva ku-electrode eyinegethivu ngesikhathi sokushaja. Ibhethri ye-lithium ion iwuhlobo lwebhethri elishajekayo, futhi i-ion ye-lithium iyasuswa isuka ebhethrini iye ku-electrode ephozithivu ngesikhathi ikhishwa, futhi i-ion ye-lithium ye-electrode ephozithivu ibuyiselwa emuva ku-electrode eyinegethivu ngesikhathi sokushaja.

Amabhethri e-lithium ion anezici ezimbalwa ezibalulekile, i-voltage, kanye nokuminyana kwamandla, ukusebenza kwalezi zici ekugcineni kunqunywa inhlanganisela ye-lithium ion nezinto ze-electrode. Ekwakhekeni kwe-electrode, izinguquko ezicashile kukhemistri kanye nokuma zingase zibe nomthelela omkhulu ekutheni ama-ion e-lithium axhumene kangakanani nokubopha kwawo okuqinile. Ngokuhlolwa nokubala, abasunguli bocwaningo be-Livermore National Lab bathola ukuthi ebhethrini le-lithium-ion, i-electrode ye-graphene foam ephathwa nge-hydrogen ibonisa umthamo ophakeme namandla okudlulisela ngokushesha.

"Lokhu okutholiwe kunikeza ukuhlaziywa kwekhwalithi, okusiza ukuklama ama-electrode anamandla amakhulu asekelwe ezintweni ze-graphene," kusho usosayensi wezinto ezibonakalayo we-LLNL uMorriswang. Ungomunye wababhali balokhu okushicilelwe kuMbiko Wesayensi Yemvelo (NatureScientificReports Journal). Izinto ze-Gallene ekusetshenzisweni kwezentengiselwano kwezinto zokugcina amandla, okuhlanganisa amabhethri e-lithium-ion nama-supercapacitor, athinta kakhulu amandla ayo okukhiqiza le nto ngezindleko eziphansi.

Indlela yokuhlanganisa amakhemikhali evame ukusetshenziswa ekugcineni izoshiya inani elikhulu lama-athomu e-hydrogen, okunzima ukunquma imiphumela yokusebenza kwe-electrochemical ye-graphene. Ukuhlola kubacwaningi be-Livermore Lab bathole ukuthi i-hydrogen element ithuthukisa ngamabomu ukwelashwa okuyisisekelo kwe-graphene enothe okusanhlamvu, okungase empeleni kuthuthukise umthamo wesilinganiso. Ngemuva kokukhubazeka kwesici se-hydrogen kanye nokukhubazeka kwe-graphene, i-pore encane iyavuleka, engakhuthaza i-lithium ion ukuthi ingene kalula, ngaleyo ndlela ithuthukise izinga lokudlulisela.

Umthamo owengeziwe wama-cyclicable ungahlinzekwa nge-ion ye-lithium enamathiselwe onqenqemeni olusha (okungenzeka ukuthi ibambelele kusici se-hydrogen). "Ukuthuthukiswa kokusebenza kwe-electrode kuyimpumelelo ebalulekile, engavula izinhlelo zokusebenza eziningi zomhlaba wangempela," kusho umcwaningi we-postdoctoral we-Livermore Laboratory Materials Science kanye nomlobi obalulekile wamaphepha ocwaningo. Ukuze kufakwe isicelo sokusebenzisa ukukhubazeka kwe-hydrogenation kanye ne-hydrogenation ezindaweni zokugcina i-lithium ion ze-graphene, abacwaningi basebenzise izimo zokwelashwa ezihlukene zokushisa ezivezwe isici se-hydrogen esibophayo, sigxile ezintweni ze-electrochemical ze-3D graphene nanofoam (GNF) yayo.

Ihlanganiswe ne-graphene engasebenzi kahle. Abacwaningi basebenzisa i-3D graphite nano foam ngoba inezinhlobonhlobo zezinhlelo zokusebenza ezingase zibe khona, okuhlanganisa isitoreji se-hydrogen, i-catalysis, i-filtration, i-insulation, ukumuncwa kwamandla, i-capacitance desal, i-supercapacitors namabhethri e-lithium-ion, njll. Izici ze-graphene 3D foam non-adhesive adhesive ayikwazi ukuba inkimbinkimbi ngoba okungeziwe kuyinkimbinkimbi kakhulu, futhi ngaleyo ndlela ingasetshenziswa njengendlela ekahle yocwaningo lwemishini.

"Sithole ukuthi ngemuva kokwelashwa kwe-hydrogen element, i-graphite olee foam electrode inenqubekelaphambili ebalulekile. Ngokuhlanganiswa kwalokhu kuhlolwa, sizolandelela ukusebenzisana okucashile nenqubekelaphambili phakathi kokukhubazeka nezixazululo ze-hydrogen. Ekuphenduleni imiphumela yezinye izinguquko ezincane ku-graphene chemistry kanye ne-morphology, kungenzeka ukuletha imiphumela emangalisayo ephawulekayo ekusebenzeni, "Abacwaningi be-LLNL nabo banomunye umbhali walolu cwaningo" i-Brandonwood.

Ngokwalolu cwaningo, lokhu kwelashwa kwe-hydrogen element elawulwayo kungasetshenziswa futhi kwezinye izinto ze-anode ezisekelwe ku-graphene ukuze kuzuzwe ukuhanjiswa kwe-lithium ion okulungiselelwe kanye nezinhlelo zokugcina ezigaywa kabusha.