Mune yazvino yekushambadzira lithium-ion bhatiri system, iyo inomisa chinhu inonyanya kuita magetsi conductivity.Kunyanya, iyo isina kukwana conductivity yezvakanaka electrode zvinhu zvinogadzirisa zvakananga basa re electrochemical reaction.Izvo zvinodikanwa kuti uwedzere yakakodzera conductive mumiriri kuti uwedzere kufambiswa kwezvinhu uye kuvaka iyo conductive network kuti ipe inokurumidza chiteshi chekutakura maelectron uye ive nechokwadi chekuti chinhu chinoshanda chinoshandiswa zvizere.Naizvozvo, iyo conductive mumiriri zvakare chinhu chakakosha mubhatiri ye lithium ion inoenderana neiyo inoshanda zvinhu.

Kuitwa kweanoitisa agent kunoenderana zvakanyanya nechimiro chemidziyo uye maitiro ayo ari kusangana neanoshanda zvinhu.Inowanzo shandiswa lithium ion bhatiri conductive agents vane zvinotevera maitiro:

(1) Carbon dema: Chimiro chekabhoni nhema chinoratidzwa nechiyero chekuunganidzwa kwekabhoni nhema zvidimbu mucheni kana chimiro chemuzambiringa.Izvo zvimedu zvakanaka, iyo yakawanda yakarongedzerwa netiweki cheni, yakakura chaiyo nzvimbo, uye unit mass, izvo zvinobatsira kuumba cheni conductive chimiro mu electrode.Semumiriri wechinyakare conductive agents, kabhoni nhema parizvino ndiyo inonyanya kushandiswa conductive agent.Izvo zvisingabatsiri ndezvokuti mutengo wakakwirira uye zvakaoma kupararira.

(2)Graphite: Conductive graphite inoratidzwa nehukuru hwechidimbu huri pedyo neiyo yezvinhu zvakanaka uye zvisina kunaka zvinoshanda, nzvimbo yakadzikama yakananga, uye magetsi akanaka.Inoshanda se node ye conductive network mubhatiri, uye mu electrode yakaipa, haigoni kungovandudza conductivity , asiwo kukwanisa.

3Iyo yakaipa ndeyokuti yakaoma kupararira.

(4)Carbon nanotubes(CNTs): CNTs ma conductive agents akabuda mumakore achangopfuura.Ivo kazhinji vane dhayamita ingangoita 5nm uye kureba kwe10-20um.Ivo havangogone kuita se "waya" mune conductive network, asi zvakare vane kaviri electrode layer mhedzisiro yekupa kutamba kune yakakwirira-chiyero maitiro e supercapacitors.Yayo yakanaka yekupisa conductivity inobatsirawo pakupisa kupisa panguva yekuchaja bhatiri uye kubuda, kuderedza bhatiri polarization, kunatsiridza bhatiri yakakwirira uye yakaderera tembiricha kuita, uye kuwedzera hupenyu hwebhatiri.

Semunhu anoitisa, CNTs inogona kushandiswa pamwe chete neyakasiyana-siyana yakanaka electrode zvinhu kuvandudza kugona, chiyero, uye kutenderera kuita kwezvinhu / bhatiri.Iyo yakanaka electrode zvinhu zvinogona kushandiswa zvinosanganisira: LiCoO2, LiMn2O4, LiFePO4, polymer positive electrode, Li3V2(PO4)3, manganese oxide, nezvimwe zvakadaro.

Kuenzaniswa nemamwe akajairika conductive agents, kabhoni nanotubes ine akawanda mabhenefiti seakanaka uye asina kunaka conductive agents emabhatiri e lithium ion.Carbon nanotubes ane high magetsi conductivity.Pamusoro pezvo, maCNT ane chiyero chakakura, uye huwandu hwekuwedzera hunogona kuwana percolation pachikumbaridzo chakafanana nezvimwe zvinowedzera (kuchengetedza chinhambwe chemaerekitironi mukomboni kana kutama kwenzvimbo).Sezvo kabhoni nanotubes inogona kuumba yakanyatso shanda electron transport network, conductivity value yakafanana neye spherical particle additive inogona kuwanikwa ne 0.2 wt% chete yeSWCNTs.

(5)Graphenerudzi rutsva rwemaviri-dimensional flexible planar carbon material ine yakanakisa magetsi uye inopisa conductivity.Chimiro chinobvumira graphene sheet layer kuti ibatire kune inoshanda zvinhu zvimedu, uye inopa huwandu hukuru hwemaitirwo ekusangana masaiti ezvakanaka uye zvisina kunaka electrode inoshanda zvinhu zvimedu, kuitira kuti maerekitironi agone kuitwa munzvimbo ine mativi maviri kuti aumbe yakakura-nzvimbo conductive network.Saka inoonekwa seyakanakira conductive mumiriri parizvino.

Iyo kabhoni dema uye inoshanda zvinhu zviri padanho rekubatana, uye inogona kupinda mukati mezvikamu zvezvinhu zvinoshanda kuti iwedzere zvizere chiyero chekushandiswa kwezvinhu zvinoshanda.Iyo kabhoni nanotubes iri mumutsara wekusangana, uye inogona kupindirana pakati pezvinhu zvinoshanda kuti igadzire network chimiro, iyo isingango wedzera conductivity, Panguva imwecheteyo, inogona zvakare kuita sechikamu chekubatanidza mumiriri, uye nzira yekubata yegraphene. is point-to-face contact, iyo inogona kubatanidza pamusoro pezvinhu zvinoshanda kuti iite yakakura-nzvimbo conductive network semuviri mukuru, asi zvakaoma kuvhara zvachose zvinhu zvinoshanda.Kunyange kana huwandu hwegraphene hwakawedzerwa hukaramba huchiwedzerwa, zvakaoma kushandisa zvachose zvinhu zvinoshanda, uye kuparadzira Li ions uye kukanganisa kushanda kwe electrode.Naizvozvo, zvinhu zvitatu izvi zvine maitiro akanaka ekuwedzera.Kusanganisa kabhoni dema kana kabhoni nanotubes negraphene kuti ivake yakawedzera kukwana conductive network inogona kuwedzera kuvandudza kushanda kwese kwe electrode.

Pamusoro pezvo, kubva pamaonero egraphene, kuita kwegraphene kunosiyana kubva kune dzakasiyana nzira dzekugadzirira, padanho rekudzikisa, saizi yebepa uye chiyero checarbon dema, dispersibility, uye ukobvu hwemagetsi zvese zvinokanganisa zvisikwa. ye conductive agents zvakanyanya.Pakati pavo, sezvo basa reiyo conductive agent ndeyekuvaka conductive network yekutakura erekitironi, kana iyo conductive mumiriri pachayo isina kupararira zvakanaka, zvakaoma kuvaka network inoshanda conductive.Kana ichienzaniswa neyechinyakare kabhoni dema conductive agent, graphene ine yakanyanya-yakakwirira chaiyo nzvimbo, uye iyo π-π conjugate mhedzisiro inoita kuti zvive nyore kuunganidza mune inoshanda maapplication.Naizvozvo, kugadzira graphene kuumba yakanaka dispersion system uye kushandisa zvizere kuita kwayo kwakanakisa idambudziko rakakosha rinoda kugadziriswa mukushandiswa kwakapararira kwegraphene.