Ma la kordhin karaa nolosha baytariga lithium ion si loogu daro curiyaha hydrogen?

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Cilmi-baarayaasha Raunns Rifo Moore National Laboratory (LLNL) waxay ogaadeen in awoodda baytariga si weyn loo hagaajin karo ilaa inta curiyaha hydrogen lagu daro electrodes ee baytariyada lithium-ion, taas oo kordhin doonta wakhtiga shaqada iyo dardargelinta hawlaha gudbinta. Baytariga lithium ion waa nooca baytari dib loo dallaci karo, ion lithium-ka ayaa laga raray baytariga una guurayaa electrode-ka togan inta lagu jiro dheecaanka Baytariga lithium ion waa nooca baytari dib loo dallaci karo, ion lithium-ka ayaa laga raray baytariga una guurayaa electrode-ka togan inta lagu jiro dheecaanka

Baytariyada lithium ion waxay leeyihiin dhowr astaamood oo muhiim ah, danab, iyo cufnaanta tamarta, waxqabadka sifooyinkan waxaa ugu dambeyntii lagu go&39;aamiyaa isku dhafka lithium ions iyo walxaha elektiroonigga ah. Qaab dhismeedka korantada, isbeddellada daahsoon ee kimisteriga iyo qaababka ayaa si weyn u saameyn kara sida ion lithium ay ugu xiran yihiin isku xirnaantooda adag. Tijaabooyin iyo xisaabin, cilmi-baarayaal cilmi-baadhiseed oo ka tirsan Shaybaadhka Qaranka ee Livermore waxay ogaadeen in baytari lithium-ion ah, korantada xumbo graphene ee lagu daaweeyay hydrogen-ka ay muujiso awood sare iyo awood gudbin degdeg ah.

"Natiijooyinkani waxay bixiyaan falanqaynta tayada, taas oo gacan ka geysanaysa naqshadaynta korantada tamarta sare leh ee ku salaysan walxaha graphene," saynisyahanka maadada LLNL Morriswang ayaa yidhi. Isagu sidoo kale waa mid ka mid ah qorayaasha tan lagu daabacay Warbixinta Sayniska Dabiiciga ah (NatureScientificReports Journal). Qalabka Gallene ee codsiga ganacsiga ee walxaha kaydinta tamarta, oo ay ku jiraan baytariyada lithium-ion iyo supercapacitors, si dhab ah u saameeya awoodda ay u leedahay in ay soo saaraan alaabtan qiimo jaban.

Habka isku-dhafka kiimikaad ee sida caadiga ah loo isticmaalo ayaa ugu dambeyntii ka tagi doona tiro badan oo atomyada hydrogen ah, taas oo ay adag tahay in la go&39;aamiyo saameynta waxqabadka korantada ee graphene. Tijaabooyinka cilmi-baarayaasha Livermore Lab waxay ogaadeen in curiyaha hydrogen uu si ula kac ah u wanaajiyo daaweynta heerkulka saldhigga ah ee graphene qani ku ah hadhuudh, taas oo dhab ahaantii hagaajin karta awoodda heerka. Ka dib cilladaha curiyaha hydrogen iyo cilladaha graphene, daloolka yar ayaa la furay, kaas oo kor u qaadi kara ion lithium si sahlan loo dhex galo, taas oo hagaajinaysa heerka gudbinta.

Awood badan oo wareeg ah ayaa lagu bixin karaa iyada oo loo marayo ion lithium oo ku dheggan cidhifka cusub (waxay u badan tahay inay ku dheggan tahay curiyaha hydrogen). "Hagaajinta waxqabadka korantada waa horumar muhiim ah, kaas oo furi kara codsiyo badan oo adduunka ah," ayuu yiri cilmi-baaraha postdoctoral ee Sayniska Qalabka Shaybaarka Livermore iyo qoraaga muhiimka ah ee waraaqaha cilmi-baarista. Si loo codsado isticmaalka hydrogenation-ka iyo cilladaha hydrogenation ee hantida kaydinta lithium ion ee graphene, cilmi-baarayaashu waxay codsadeen xaalado daaweyn kulayl oo kala duwan oo ay soo bandhigtay curiyaha hydrogen ee ku xiran, iyagoo diiradda saaraya sifooyinka korantada ee 3D graphene nanofoam (GNF).

Ka kooban graphene cilladaysan. Cilmi-baadhayaashu waxay isticmaalaan xumbo graphite nano 3D sababtoo ah waxay leedahay codsiyo kala duwan oo suurtagal ah, oo ay ku jiraan kaydinta hydrogen, catalysis, sifeynta, dahaarka, nuugista tamarta, desal capacitance, supercapacitors iyo baytariyada lithium-ion, iwm. Astaamaha xumbo 3D graphene ee koollada aan koollada ahayn ma noqon karaan kuwo aad u dhib badan sababtoo ah wax lagu daro ayaa aad u dhib badan, sidaas darteed waxaa loo isticmaali karaa doorasho ku habboon cilmi-baarista farsamada.

"Waxaan ogaanay in daaweynta curiyaha hydrogen ka dib, graphite olee xumbo electrode uu leeyahay horumar la taaban karo. Isku dhafka tijaabadan, waxaan la socon doonaa isdhexgalka khiyaanada leh iyo horumarka u dhexeeya cilladaha iyo xalalka hydrogen. Iyada oo laga jawaabayo natiijooyinka qaar ka mid ah isbeddellada yaryar ee kimistariga graphene iyo morphology, waxaa suurtagal ah in la keeno saameyn la yaab leh oo la yaab leh oo ku saabsan waxqabadka, "cilmi-baarayaasha LLNL sidoo kale waxay leeyihiin qoraa kale oo daraasaddan ah" Brandonwood.

Sida laga soo xigtay daraasaddan, daawaynta curiyaha hydrogen ee la kantaroolay ayaa sidoo kale loo isticmaali karaa agabyada anode-ga ee graphene-ku-salaysan si loo gaadho gudbinta lithium ion la hagaajiyay iyo codsiyada kaydinta dib loo warshadayn karo.