Kwinkqubo yebhetri ye-lithium-ion yangoku yorhwebo, into ethintelayo ngokuyintloko yi-conductivity yombane.Ngokukodwa, i-conductivity eyaneleyo yezinto ezilungileyo ze-electrode zithintela ngokuthe ngqo umsebenzi we-electrochemical reaction.Kuyimfuneko ukongeza i-agent esebenzayo efanelekileyo yokuphucula ukuqhutyelwa kwezinto kunye nokwakha inethiwekhi yokuqhuba ukubonelela umjelo okhawulezayo wokuthutha i-electron kunye nokuqinisekisa ukuba izinto ezisebenzayo zisetyenziswe ngokupheleleyo.Ke ngoko, iarhente eqhubayo ikwayinto eyimfuneko kwibhetri ye-lithium ion ngokunxulumene nezinto ezisebenzayo.

Ukusebenza kwe-agent eqhubayo kuxhomekeke kumlinganiselo omkhulu kwisakhiwo sezinto eziphathekayo kunye neendlela ezidibana ngayo nezinto ezisebenzayo.Isetyenziswa ngokuqhelekileyo i-lithium ion ibhetri ye-conductive agents zinezi mpawu zilandelayo:

(1) Ikhabhoni emnyama: Ubume bekhabhoni emnyama bubonakaliswa yinqanaba lokudityaniswa kwamasuntswana amnyama ekhabhoni kwitsheyini okanye ukumila komdiliya.Amasuntswana amahle, ikhonkco lothungelwano oluxineneyo, indawo enkulu yendawo ethile, kunye nobunzima beyunithi, eziluncedo ukwenza ikhonkco le-conductive structure kwi-electrode.Njengommeli we-conductive agents, i-carbon black okwangoku isetyenziswa kakhulu kwi-agent conductive.Ukungalungi kukuba ixabiso liphezulu kwaye kunzima ukusabalalisa.

(2)Igraphite: I-graphite ye-conductive ibonakaliswe ngobungakanani be-particle kufuphi neyona nto isebenzayo kunye ne-negative esebenzayo, indawo ethile ephakathi, kunye nokuhanjiswa kombane.Isebenza njenge-node yenethiwekhi ye-conductive kwibhetri, kwaye kwi-electrode engafanelekanga, ayikwazi nje ukuphucula i-conductivity , kodwa kunye nomthamo.

(3) I-P-Li: I-Super P-Li ibonakaliswe ngobungakanani bamasuntswana amancinci, afana nekhabhoni eqhubayo emnyama, kodwa indawo ethile ephakathi, ngokukodwa ngendlela yamasebe ebhetri, enenzuzo kakhulu ekwenzeni inethiwekhi ye-conductive.Ububi kukuba kunzima ukusabalalisa.

(4)Iinanotube zeCarbon(CNTs): I-CNTs zii-agent eziqhubayo eziye zavela kwiminyaka yamuva.Ngokuqhelekileyo banobubanzi obumalunga ne-5nm kunye nobude be-10-20um.Abakwazi nje ukwenza "njengeingcingo" kuthungelwano oluqhubayo, kodwa baphinde babe nefuthe le-electrode ephindwe kabini ukunika umdlalo kwiimpawu eziphezulu ze-supercapacitors.Ukuqhuba kakuhle kwe-thermal kukwanceda ukutshatyalaliswa kobushushu ngexesha lokutshaja kwebhetri kunye nokukhupha, ukunciphisa i-polarization yebhetri, ukuphucula ukusebenza kwebhetri ephezulu kunye neqondo eliphantsi, kunye nokwandisa ubomi bebhetri.

Njenge-agent eqhubayo, ii-CNTs zingasetyenziswa ngokudityaniswa nezinto ezahlukeneyo ze-electrode ezilungileyo ukuphucula umthamo, izinga, kunye nokusebenza komjikelo wezinto / ibhetri.Izinto eziphathekayo ze-electrode ezinokuthi zisetyenziswe ziquka: i-LiCoO2, i-LiMn2O4, i-LiFePO4, i-polymer positive electrode, i-Li3V2 (PO4) 3, i-manganese oxide, kunye nokunye okunjalo.

Xa kuthelekiswa nezinye ii-conductive agents eziqhelekileyo, i-carbon nanotubes ineenzuzo ezininzi njenge-positive kunye ne-negative conductive agents kwiibhetri ze-lithium ion.Iinanotubes zekhabhoni zine-conductivity ephezulu yombane.Ukongeza, ii-CNTs zinomlinganiselo omkhulu we-aspect ratio, kwaye isixa esisezantsi sokongeza sinokufikelela kwi-percolation threshold efana nezinye izongezo (ukugcina umgama wee-electron kwi-compound okanye ukufuduka kwendawo).Ekubeni i-carbon nanotubes inokwenza inethiwekhi yezothutho ye-electron esebenza kakhulu, ixabiso le-conductivity elifana nelo le-spherical particle additive linokufezekiswa kuphela nge-0.2 wt% ye-SWCNTs.

(5)Igrapheneluhlobo olutsha lwe-two-dimensional flexible planar carbon material kunye nombane obalaseleyo kunye ne-thermal conductivity.Ulwakhiwo luvumela i-graphene sheet layer ukuba ibambelele kumasuntswana asebenzayo, kwaye ibonelele ngenani elikhulu leendawo zoqhagamshelwano eziqhubayo ze-electrode esebenzayo kunye ne-negative particles esebenzayo, ukwenzela ukuba ii-electron ziqhutywe kwisithuba se-dimensional-dimensional . indawo enkulu yothungelwano.Ke ngoko ithathwa njengeyona arhente isebenzayo ngoku.

Ikhabhoni emnyama kunye nezinto ezisebenzayo zihambelana nenqaku, kwaye zinokungena kwiinqununu zezinto ezisebenzayo ukuze zikhulise ngokupheleleyo umlinganiselo wokusetyenziswa kwezinto ezisebenzayo.I-carbon nanotubes ikwi-point line yoqhagamshelwano, kwaye inokudityaniswa phakathi kwezinto ezisebenzayo ukwenza isakhiwo sothungelwano, esingagcini nje ukwandisa i-conductivity, Ngelo xesha, inokuthi isebenze njenge-arhente yokudibanisa inxalenye, kunye nemodi yoqhagamshelwano yegraphene. lunxibelelwano lwe-point-to-face, olunokuthi ludibanise umphezulu wezinto ezisebenzayo ukwenza inethiwekhi ye-conductive yendawo enkulu njengomzimba oyintloko, kodwa kunzima ukugubungela ngokupheleleyo izinto ezisebenzayo.Nokuba isixa segraphene esongeziweyo sonyuka ngokuqhubekayo, kunzima ukusebenzisa ngokupheleleyo izinto ezisebenzayo, kunye nokusasaza ii-ion zeLi kunye nokuwohloka kokusebenza kwe-electrode.Ke ngoko, ezi zixhobo zithathu zinendlela efanelekileyo yokuhambelana.Ukudibanisa i-carbon black okanye i-carbon nanotubes kunye ne-graphene ukwakha inethiwekhi ye-conductive epheleleyo kunokuphucula ngakumbi ukusebenza ngokubanzi kwe-electrode.

Ukongeza, ngokwembono yegraphene, ukusebenza kwegraphene kuyahluka kwiindlela ezahlukeneyo zokulungiselela, kwinqanaba lokunciphisa, ubungakanani beshiti kunye nomlinganiselo wekhabhoni emnyama, ukusasazeka, kunye nobukhulu be-electrode zonke zichaphazela indalo. ye-conductive agents kakhulu.Phakathi kwabo, ekubeni umsebenzi we-agent agent kukwakha inethiwekhi ye-conductive yokuthutha i-electron, ukuba i-agent conductive ngokwayo ayisasazwanga kakuhle, kunzima ukwakha inethiwekhi esebenzayo.Xa kuthelekiswa ne-agent ye-carbon black conductive yemveli, igraphene inomphezulu ophakamileyo wendawo ethile, kwaye isiphumo se-π-π senza kube lula ukudityaniswa kwi-agglomerate kwizicelo ezisebenzayo.Ngoko ke, indlela yokwenza i-graphene ibe yinkqubo yokusasazwa kakuhle kwaye isebenzise ngokupheleleyo ukusebenza kwayo okugqwesileyo yingxaki ephambili ekufuneka isonjululwe ekusetyenzisweni okubanzi kwegraphene.