M'dongosolo lamakono la batri la lithiamu-ion, zomwe zimalepheretsa zimakhala makamaka magetsi.Makamaka, osakwanira madutsidwe wa zinthu zabwino elekitirodi mwachindunji malire ntchito ya electrochemical anachita.Ndikofunikira kuwonjezera chowongolera choyenera kuti chithandizire kuwongolera kwazinthuzo ndikupanga netiweki ya conductive kuti ipereke njira yofulumira yonyamulira ma elekitironi ndikuwonetsetsa kuti zinthuzo zikugwiritsidwa ntchito mokwanira.Choncho, wothandizila conductive ndi zinthu zofunika kwambiri mu batire lifiyamu ion wachibale zinthu yogwira.

Kuchita kwa conductive wothandizira kumadalira kwambiri pa kapangidwe kazinthu ndi machitidwe omwe amakhudzana ndi zinthu zogwira ntchito.Nthawi zambiri lifiyamu ion batire conductive wothandizira ali ndi izi:

(1) Mpweya wakuda: Mapangidwe a mpweya wakuda amawonetsedwa ndi kuchuluka kwa kuphatikizika kwa tinthu ta kaboni wakuda mu unyolo kapena mawonekedwe amphesa.Tinthu tating'onoting'ono tating'onoting'ono, unyolo wodzaza kwambiri ndi maukonde, malo akulu enieni padziko lapansi, ndi ma unit misa, omwe amapindulitsa kupanga unyolo wowongolera mu elekitirodi.Monga nthumwi ya ma conductive achikhalidwe, kaboni wakuda ndiye yemwe amagwiritsidwa ntchito kwambiri.Choyipa chake ndikuti mtengo wake ndi wokwera ndipo ndizovuta kubalalika.

(2)Graphite: Conductive graphite amakhala ndi tinthu kukula pafupi ndi zabwino ndi zoipa yogwira zipangizo, zolimbitsa enieni pamwamba m'dera, ndi madutsidwe wabwino magetsi.Zimakhala ngati mfundo ya maukonde conductive mu batire, ndi elekitirodi zoipa, izo sizingakhoze kusintha madutsidwe , komanso mphamvu.

(3) P-Li: Super P-Li yodziwika ndi yaing'ono tinthu kukula, ofanana conductive mpweya wakuda, koma zolimbitsa enieni padziko m'dera, makamaka mu mawonekedwe a nthambi mu batire, amene n'kopindulitsa kwambiri kupanga maukonde conductive.Choyipa chake ndikuti ndizovuta kubalalika.

(4)Mpweya nanotubes (CNTs): CNTs ndi othandizira omwe atuluka m'zaka zaposachedwa.Nthawi zambiri amakhala ndi mainchesi pafupifupi 5nm ndi kutalika kwa 10-20um.Sangangokhala ngati "mawaya" mumanetiweki owongolera, komanso amakhala ndi ma elekitirodi awiri osanjikiza mphamvu kuti apereke kusewera kwapamwamba kwambiri kwa ma supercapacitor.Kutentha kwake kwabwino kumathandizanso kuti kutentha kwapakati pa batire kulipirire ndikutulutsa, kuchepetsa kufalikira kwa batri, kupititsa patsogolo magwiridwe antchito a batri komanso kutentha pang'ono, ndikuwonjezera moyo wa batri.

Monga conductive wothandizira, CNTs angagwiritsidwe ntchito osakaniza zosiyanasiyana zabwino elekitirodi zipangizo kusintha mphamvu, mlingo, ndi mkombero ntchito zakuthupi / batire.Zida zabwino zama elekitirodi zomwe zingagwiritsidwe ntchito zikuphatikizapo: LiCoO2, LiMn2O4, LiFePO4, electrode polima polima, Li3V2(PO4)3, manganese oxide, ndi zina zotero.

Poyerekeza ndi ma conductive agents ena wamba, ma carbon nanotubes ali ndi zabwino zambiri monga zabwino komanso zoyipa zopangira mabatire a lithiamu ion.Mpweya wa carbon nanotubes uli ndi mphamvu zambiri zamagetsi.Komanso, CNTs ndi lalikulu mbali chiŵerengero, ndi m'munsi Kuwonjezera kuchuluka akhoza kukwaniritsa percolation pachimake ofanana zina zina (kusunga mtunda wa ma elekitironi mu pawiri kapena kusamuka m'deralo).Popeza carbon nanotubes akhoza kupanga kwambiri imayenera ma elekitironi zoyendera maukonde, madutsidwe mtengo wofanana ndi ozungulira tinthu zowonjezera akhoza kukwaniritsa ndi 0.2 wt% yokha ya SWCNTs.

(5)Graphenendi mtundu watsopano wa zinthu ziwiri-dimensional flexible planar carbon zinthu zabwino kwambiri zamagetsi ndi matenthedwe madutsidwe.kapangidwe amalola graphene pepala wosanjikiza kutsatira yogwira zinthu particles, ndi kupereka chiwerengero chachikulu cha conductive kukhudzana malo zabwino ndi zoipa elekitirodi yogwira zinthu particles, kotero kuti ma elekitironi akhoza kuchitikira mu awiri dimensional danga kupanga lalikulu-adera conductive network.Chifukwa chake imatengedwa ngati njira yabwino yoperekera pano.

Mpweya wakuda wakuda ndi zinthu zogwira ntchito ndizomwe zimagwirizanitsa, ndipo zimatha kulowa mu tinthu tating'onoting'ono tomwe timagwiritsa ntchito kuti tiwonjezere kuchuluka kwa kugwiritsidwa ntchito kwa zinthu zogwira ntchito.Mpweya nanotubes ali mu mfundo mzere kukhudzana, ndipo akhoza interspersed pakati pa zipangizo yogwira kupanga dongosolo maukonde, amene osati kumawonjezera madutsidwe, Pa nthawi yomweyo, akhoza kuchita ngati tsankho kugwirizana wothandizila, ndi kukhudzana akafuna graphene. ndi mfundo ndi maso kukhudzana, amene angathe kulumikiza pamwamba zinthu yogwira kupanga lalikulu-m`dera conductive maukonde monga thupi lalikulu, koma n`zovuta kuphimba kwathunthu zinthu yogwira.Ngakhale kuchuluka kwa graphene komwe kumawonjezeredwa kukuchulukirachulukira, kumakhala kovuta kugwiritsa ntchito zinthu zonse zogwira ntchito, ndikufalitsa ma ion a Li ndikuwononga ma elekitirodi.Chifukwa chake, zida zitatuzi zili ndi njira yabwino yothandizirana.Kusakaniza mpweya wakuda kapena carbon nanotubes ndi graphene kuti amange wathunthu conductive network akhoza kupititsa patsogolo ntchito yonse ya elekitirodi.

Kuphatikiza apo, malinga ndi graphene, magwiridwe antchito a graphene amasiyana mosiyanasiyana pokonzekera, pamlingo wa kuchepetsa, kukula kwa pepala ndi chiŵerengero cha mpweya wakuda, dispersibility, ndi makulidwe a elekitirodi zonse zimakhudza chilengedwe. ma conductive agents kwambiri.Pakati pawo, popeza ntchito ya conductive ndi kumanga maukonde conductive ma elekitironi zoyendera, ngati conductive wothandizira palokha si bwino omwazika, n'zovuta kumanga ogwira conductive maukonde.Poyerekeza ndi chikhalidwe chakuda cha carbon black conductive agent, graphene ili ndi malo okwera kwambiri, ndipo π-π conjugate effect imapangitsa kuti zikhale zosavuta kugwirizanitsa ntchito zothandiza.Choncho, momwe mungapangire graphene kukhala njira yabwino yobalalitsira ndikugwiritsa ntchito bwino ntchito yake yabwino kwambiri ndilo vuto lalikulu lomwe liyenera kuthetsedwa pakufalikira kwa graphene.

 


Nthawi yotumiza: Dec-18-2020

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