Ngaba ubomi bebhetri ye-lithium ion bunokwandiswa ukongeza into ye-hydrogen?

作者：Iflowpower – Kaasaskantava elektrijaama tarnija

Abaphandi beRaunns Rifo Moore National Laboratory (LLNL) bafumanisa ukuba amandla ebhetri anokuphuculwa kakhulu nje ngokuba i-hydrogen element yongezwa kwi-electrodes yebhetri ye-lithium-ion, eya kwandisa ixesha lokusebenza kunye nokukhawulezisa imisebenzi yokuhambisa. Ibhetri ye-lithium ion luhlobo lwebhetri ehlaziywayo, kwaye i-ion ye-lithium isuswa kwibhetri ukuya kwi-electrode efanelekileyo ngexesha lokukhutshwa, kwaye i-lithium ion ye-electrode efanelekileyo ibuyiselwa kwi-electrode engafanelekanga ngexesha lokutshaja. Ibhetri ye-lithium ion luhlobo lwebhetri ehlaziywayo, kwaye i-ion ye-lithium isuswa kwibhetri ukuya kwi-electrode efanelekileyo ngexesha lokukhutshwa, kwaye i-lithium ion ye-electrode efanelekileyo ibuyiselwa kwi-electrode engafanelekanga ngexesha lokutshaja.

Iibhetri ze-ion zeLithium zineempawu ezininzi eziphambili, i-voltage, kunye noxinano lwamandla, ukusebenza kwezi mpawu ekugqibeleni kugqitywe ngokudityaniswa kwee-ion ze-lithium kunye nezixhobo ze-electrode. Kwisakhiwo se-electrode, utshintsho olufihlakeleyo kwimichiza kunye neemilo zinokuchaphazela kakhulu indlela i-lithium ion eqinile ngayo kwi-bonding yabo eqinile. Ngokusebenzisa imifuniselo kunye nokubala, abaqulunqi bophando beLivermore National Lab bafumanisa ukuba kwibhetri ye-lithium-ion, i-hydrogen-treated graphene foam electrode ibonisa umthamo ophezulu kunye nomthamo wokuhambisa ngokukhawuleza.

"Ezi ziphumo zibonelela ngohlalutyo lomgangatho, olunceda ukuyila ii-electrode ezinamandla kakhulu ezisekwe kwizinto zegraphene," utshilo usosayensi weLLNL uMorriswang. Ukwangomnye wababhali bale nto ipapashwe kwiNgxelo yeNzululwazi yezeNdalo (NatureScientificReports Journal). Izinto zeGallene ekusetyenzisweni kwezorhwebo zezinto zokugcina amandla, kubandakanywa iibhetri ze-lithium-ion kunye ne-supercapacitors, ezichaphazela kakhulu amandla ayo okuvelisa le nto ngexabiso eliphantsi.

Indlela yokudibanisa imichiza esetyenziswa ngokuqhelekileyo ekugqibeleni iya kushiya inani elikhulu le-athomu ye-hydrogen, enzima ukumisela imiphumo yokusebenza kwe-electrochemical performance yegraphene. Iimvavanyo kwi-Livermore Lab abaphandi bafumanise ukuba into ye-hydrogen iphucula ngabom isiseko sonyango lobushushu begraphene etyebileyo, enokuphucula umthamo wesantya. Emva kweziphene ze-hydrogen element kunye neziphene kwigraphene, i-pore encinci iyavulwa, enokukhuthaza i-lithium ion lula ukungena, ngaloo ndlela iphucula izinga lokudluliselwa.

Umthamo othe kratya we-cyclicable unokubonelelwa nge-lithium ion edityaniswe kumda omtsha (okunokwenzeka kakhulu ukubambelela kwinto ye-hydrogen). "Ukuphuculwa kwentsebenzo ye-electrode yinto ebalulekileyo, enokuthi ivule izicelo zehlabathi zangempela," watsho umphandi we-postdoctoral we-Livermore Laboratory Materials Science kunye nombhali obalulekileyo wamaphepha ophando. Ukuze kufakwe isicelo sokusetyenziswa kwe-hydrogenation kunye ne-hydrogenation defects kwi-lithium ion yokugcina iipropati ze-graphene, abaphandi basebenzise iimeko ezahlukeneyo zokunyanga ukushisa ezivezwe yinto ebophelelayo ye-hydrogen, egxininisa kwiipropati ze-electrochemical ze-3D zayo ze-graphene nanofoam (GNF).

Yenziwe ngegraphene enesiphene. Abaphandi basebenzisa i-3D ye-graphite nano foam kuba ineendlela ezahlukeneyo zokusebenzisa, kubandakanywa ukugcinwa kwe-hydrogen, i-catalysis, i-filtration, i-insulation, i-energy absorption, i-capacitance desal, i-supercapacitors kunye neebhetri ze-lithium-ion, njl. Iimpawu zegraphene 3D foam non-adhesive adhesive ayinakuba nzima ngakumbi kuba isongezelelo sinzima ngakumbi, kwaye ke sinokusetyenziswa njengolona khetho lufanelekileyo lophando lwendlela.

"Sifumene ukuba emva kokunyangwa kwe-hydrogen element, i-graphite olee foam electrode inenkqubela phambili ebalulekileyo. Ngokudityaniswa kolu vavanyo, siya kulandelela ukusebenzisana okufihlakeleyo kunye nenkqubela phambili phakathi kweziphene kunye nezisombululo ze-hydrogen. Ukuphendula kwiziphumo zolunye utshintsho oluncinci kwi-graphene chemistry kunye ne-morphology, kunokwenzeka ukuzisa imiphumo ebalulekileyo emangalisayo ekusebenzeni, "abaphandi be-LLNL nabo banomnye umbhali wale sifundo" uBrandonwood.

Ngokwalolu phononongo, olu nyango lulawulwayo lwe-hydrogen element lunokusetyenziswa kwezinye izinto ze-anode ezisekelwe kwigraphene ukuze kuphunyezwe ukuhanjiswa kwe-lithium ion kunye nezicelo zokugcinwa ezinokuphinda zisetyenziswe.