Mainjiniya paYunivhesiti yeCalifornia San Diego vakagadzira mabhatiri e-lithium-ion anoita zvakanaka pakutonhora kwechando uye kupisa kunopisa, uku achirongedza simba rakawanda.Vatsvakurudzi vakazadzisa izvi kuburikidza nekugadzira electrolyte iyo isingangoiti zvinhu zvakasiyana-siyana uye yakasimba mukati mehupamhi hwekushisa, asiwo inoenderana nepamusoro pesimba anode uye cathode.
Mabhatiri anoshingirira tembirichazvinotsanangurwa mubepa rakaburitswa svondo raChikunguru 4 muProceedings of the National Academy of Sciences (PNAS).
Mabhatiri akadaro aigona kubvumira motokari dzemagetsi munzvimbo dzinotonhora kuti dziende kure nechaji imwe chete;vanokwanisawo kuderedza kudiwa kwemasisitimu ekutonhodza kuchengetedza mabhatiri emotokari kubva pakupisa mumamiriro ekunze anopisa, akadaro Zheng Chen, purofesa we nanoengineering paUC San Diego Jacobs Chikoro cheUinjiniya uye munyori mukuru wechidzidzo ichi.
“Unoda kuvhiyiwa kwekushisa kwakanyanya munzvimbo dzine tembiricha inogona kusvika manhamba matatu uye migwagwa inotowedzera kupisa.Mumotokari dzemagetsi, mabhatiri anotakura anowanzo ari pasi pevhu, padyo nemigwagwa iyi inopisa,” akatsanangura kudaro Chen, uyo ari nhengo yedare reUC San Diego Sustainable Power and Energy Center."Uyezve, mabhatiri anodziya kubva paanenge achimhanya panguva yekushanda.Kana mabhatiri asingakwanisi kushivirira uku kudziya kwakanyanya, kuita kwavo kunokurumidza kuderera. "
Mukuedzwa, mabhatiri ehumbowo-ye-pfungwa akachengeta 87.5% uye 115.9% yesimba rawo pa -40 uye 50 C (-40 uye 122 F), zvichiteerana.Vaivewo nepamusoro peCoulombic efficiency ye98.2% uye 98.7% patembiricha idzi, zvichiteerana, zvichireva kuti mabhatiri anogona kubhadhariswa zvakanyanya uye kuburitsa madhizaini asati amira kushanda.
Mabhatiri akagadzirwa naChen nevamwe vaaishanda navo ese anotonhora uye anoshivirira kupisa nekuda kwe electrolyte yavo.Inogadzirwa nemhinduro yemvura ye dibutyl ether yakasanganiswa ne lithium munyu.Chinhu chakakosha nezve dibutyl ether ndechekuti mamorekuru ayo anosunga zvisina simba kune lithium ions.Mune mamwe mazwi, mamorekuru e electrolyte anogona kuregedza nyore lithium ions sezvo bhatiri rinomhanya.Uku kupindirana kwema molecular, nevaongorori vakawana muchidzidzo chakapfuura, kunovandudza mashandiro ebhatiri pane tembiricha yepasi-zero.Uyezve, dibutyl ether inogona kutora kupisa zviri nyore nekuti inogara iri mvura patembiricha yakakwira (ine kuvira kwe141 C, kana 286 F).
Kudzikamisa lithium-sarufa chemistries
Chakanyanya kukosha pa electrolyte iyi ndechekuti inofambirana ne lithium-sulphur bhatiri, inova imhando yebhatiri rechargeable rine anode yakagadzirwa nelithium metal uye cathode yakagadzirwa nesarufa.Lithium-sarufa mabhatiri chikamu chakakosha chechizvarwa chinotevera bhatiri tekinoroji nekuti anovimbisa yakakwira simba density uye mutengo wakaderera.Vanogona kuchengeta simba rakapetwa kaviri pakirogiramu kupfuura mabhatiri e-lithium-ion anhasi - izvi zvinogona kuita kaviri huwandu hwemotokari dzemagetsi pasina kuwedzera huremu hwebhatiri pack.Zvakare, sarufa yakawanda uye haina kunetsa kunobva pane iyo cobalt inoshandiswa mune yechinyakare lithium-ion bhatiri cathodes.
Asi kune matambudziko ne lithium-sarufa mabhatiri.Ose ari maviri cathode uye anode ari super reactive.Sulfur cathodes inoshanda zvekuti inonyungudika panguva yekushanda kwebhatiri.Nyaya iyi inowedzera pakupisa kwakanyanya.Uye lithium simbi anode inokasira kugadzira tsono-sezvimiro zvinonzi madendrites anogona kubaya zvikamu zvebhatiri, zvichiita kuti iite pfupi-dunhu.Nekuda kweizvozvo, mabhatiri e-lithium-sarufa anongogara kusvika kumakumi ematenderera.
"Kana iwe uchida bhatiri rine simba rakawanda, iwe unofanirwa kushandisa hutsinye, chemistry yakaoma," akadaro Chen."Kuwanda kwesimba kunoreva kuti mamwe maitiro ari kuitika, zvinoreva kushoma kugadzikana, kuderera kwakawanda.Kugadzira bhatiri rine simba guru rakagadzikana ibasa rakaoma pacharo - kuedza kuita izvi kuburikidza nehupamhi hwekushisa kunotonyanya kunetsa. "
Iyo dibutyl ether electrolyte yakagadziridzwa neUC San Diego timu inodzivirira nyaya idzi, kunyangwe pakupisa uye kwakaderera.Mabhatiri avakaedza aive nehupenyu hurefu hwekuchovha bhasikoro pane rakajairwa lithium-sarufa bhatiri."Electrolyte yedu inobatsira kuvandudza zvose zviri zviviri cathode side uye anode side apo ichipa yakakwirira conductivity uye interfacial kugadzikana," akadaro Chen.
Chikwata chakagadzirawo sulfur cathode kuti inyatsogadzikana nekuibatanidza nepolymer.Izvi zvinodzivirira sarufa yakawanda kubva mukunyungudika mu electrolyte.
Matanho anotevera anosanganisira kukwidziridza bhatiri kemikari, kuigadzirisa kuti ishande pane tembiricha yakanyanya uye nekuwedzera hupenyu hwekutenderera.
Pepa: "Solvent yekusarudza nzira yekushisa-inogadzirisa lithium-sarufa mabhatiri."Vamwe vanyori vanosanganisira Guorui Cai, John Holoubek, Mingqian Li, Hongpeng Gao, Yijie Yin, Sicen Yu, Haodong Liu, Tod A. Pascal naPing Liu, vose vari kuUC San Diego.
Iri basa rakatsigirwa nerubatsiro rweEarly Career Faculty kubva kuNASA's Space Technology Research Grants Program (ECF 80NSSC18K1512), National Science Foundation kuburikidza neUC San Diego Materials Research Science and Engineering Center (MRSEC, kupa DMR-2011924), uye Hofisi ye Vehicle Technologies yeDhipatimendi reMagetsi reUS kuburikidza neAdvanced Battery Materials Research Program (Battery500 Consortium, kondirakiti DE-EE0007764).Basa iri rakaitwa muchikamu kuSan Diego Nanotechnology Infrastructure (SDNI) kuUC San Diego, nhengo yeNational Nanotechnology Coordinated Infrastructure, iyo inotsigirwa neNational Science Foundation (kupa ECCS-1542148).
Nguva yekutumira: Aug-10-2022