Mariha matla a betri ea lithium-ion e tla fetoha e sa tsitsang, ke hobane&39;ng ha betri ea lithium ion e "tšaba" mocheso o tlase?

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Mpamatsy tobin-jiro portable

Ho tloha ha ba kena &39;marakeng, libeteri tsa lithium-ion li fumane lisebelisoa tse ngata tse nang le melemo ea bophelo bo bolelele, matla a maholo a khethehileng, ha ho na phello ea mohopolo. Mocheso o tlase oa betri ea lithium-ion o tlase, ho fokotseha ho matla, ts&39;ebetso e mpe ea ho holisa potoloho, ketsahalo e hlakileng ea lithium, ho se leka-lekane ha lithium, jj. Leha ho le joalo, ka ho atolosoa ho tsoelang pele ha kopo, thibelo ea ts&39;ebetso e tlaase ea mocheso oa libeteri tsa lithium-ion e totobetse haholoanyane.

Ho ea ka litlaleho, matla a ho ntša betri ea lithium-ion ke hoo e ka bang 31.5% feela mocheso oa kamore ho -20 ° C. Mocheso oa tloaelo oa betri ea lithium-ion o pakeng tsa -20 - + 55 ° C.

Empa masimong a sefofane, likoloi tsa motlakase, joalo-joalo, betri e ka sebetsa hantle ho -40 ° C. Ka hona, ho bohlokoa haholo ho ntlafatsa thepa ea mocheso o tlase oa libeteri tsa lithium ion.

Lintho tse thibelang betri ea lithium-ion ts&39;ebetso ea mocheso o tlase ● Libakeng tsa mocheso o tlase, viscosity ea electrolyte ea eketseha, esita le ho tiisa ka mokhoa o itseng, e leng se etsang hore motlakase o fokotsehe oa betri ea lithium ion. ● Tšebelisano pakeng tsa electrolyte le electrode e mpe le diaphragm e senyeha tlas&39;a tikoloho e tlaase ea mocheso. ● Electrode e mpe ea betri ea lithium-ion tlas&39;a maemo a tlaase a mocheso o fokotsehile haholo, &39;me lithium ea tšepe ea precipitated e itšoara ka electrolyte,&39; me tlhahiso ea sehlahisoa e fella ka ho eketseha ha botenya ba boemo bo tiileng ba "electrolyte" (SEI).

● Lithium ion betri tlas&39;a tikoloho ea mocheso o tlaase e theoleloa, &39;me phepelo ea phetiso ea tefiso (RCT) e eketseha haholo. Puisano ka lintlha tsa ts&39;ebetso ea mocheso o tlase o amang libeteri tsa lithium ion ● Maikutlo a setsebi 1: Tharollo ea electrolyne e na le tšusumetso ea bohlokoa ts&39;ebetsong ea mocheso o tlase oa libeteri tsa lithium ion, sebopeho le thepa ea thepa ea electrolyte e na le tšusumetso ea bohlokoa ho ts&39;ebetso ea mocheso o tlase oa betri. Bothata ka betri mocheso o tlase ke: viscosity ea electrolyte e tla ba kholo, lebelo la ion conduction le lieha, le fella ka lebelo la ho falla ha elektronike ea potoloho ea ka ntle, kahoo betri e polarized haholo, &39;me tefiso le bokhoni ba ho lahla bo na le ho fokotseha ho hoholo.

Haholo-holo ha ho tjhaja mocheso o tlase, li-ion tsa lithium li ka etsa habonolo lithium delegranes holim&39;a eleketrode e mpe, e bakang ho hloleha ha betri. Ts&39;ebetso ea mocheso o tlase oa electrolyte e amana haufi-ufi le boholo ba conductivity ea electrolyte ka boeona, ion ea phetisetso ea motlakase oa motlakase e potlakile, &39;me matla a mangata a ka hlahisoa ka mocheso o tlaase. Ha letsoai la lithium le ntse le eketseha ka electrolyte, palo ea ho falla e ntse e eketseha, e phahamisa conductivity.

Motlakase o phahameng, ho potlakisa ha ion, ho fokotseha ha polarization, ho ntlafatsa ts&39;ebetso ea betri ka mocheso o tlase. Ka hona, conductivity e phahameng ke boemo bo hlokahalang bakeng sa ho finyella tshebetso e ntle ea mocheso o tlase oa libeteri tsa lithium ion. Motlakase oa motlakase oa electrolyte o amana le sebopeho sa electrolyte, &39;me viscosity ea solvent ke ho ntlafatsa tsela ea motlakase oa motlakase oa electrolyte.

The fluidity ea solvent e ntle ka mocheso o tlaase oa solvent ke tiiso ea lipalangoang tsa ion, &39;me lera le tiileng la electrolyte le entsoeng ke electrolyte ka mocheso o tlaase oa electrolyte e boetse e le senotlolo sa ho tsamaisa lithium ion,&39; me RSEI ke eona e ka sehloohong e thibelang betri ea lithium ion sebakeng se tlaase sa mocheso. ● Maikutlo a setsebi 2: Lebelo la lithium-ion betri e fokolang mocheso oa mocheso o tlaase ke keketseho e matla ea LI + ho senya impedance tlas&39;a mocheso o tlaase, empa eseng filimi ea SEI. Litšobotsi tse tlase tsa mocheso oa thepa e ntle ea electrode ea betri ea lithium ion ● 1, mocheso o tlase oa sebopeho sa lera la sebopeho se nang le lisebelisoa tse ntle tsa electrode li na le mocha o le mong oa lithium ion diffusion channel, &39;me o na le botsitso ba sebopeho sa mocha oa mahlakoreng a mararo, e leng khoebo ea pele ea khoebo.

Lintho tse ntle tsa betri ea lithium ion. Lintho tsa eona tse emetseng li kenyelletsa LiCoO2, Li (CO1-XNIX) O2 le Li (Ni, Co, Mn) O2, joalo-joalo. Xie Xiaohua, joalo-joalo.

sebelisa LiCoo2 / MCMB joalo ka lintho tsa ho etsa lipatlisiso, ho leka litšobotsi tsa eona tsa mocheso o tlase. Liphetho li bonts&39;a hore ha mocheso o ntse o fokotseha, sethala sa ho lahla se theoha ho tloha ho 3.762V (0 ° C) ho isa ho 3.

207V (-30 ° C); palo ea betri ea eona e boetse e fokotsehile ho tloha ho 78.98mA · h (0 ° C) ho ea ho 68.55mA · h (-30 ° C).

● 2, tšobotsi e tlaase ea mocheso oa thepa e ntle ea sebopeho sa spinel spinel LiMn2O4 lisebelisoa tse ntle, hobane ha ho na Co element, ho na le melemo e theko e tlaase, e se nang chefo. Leha ho le joalo, lisebelisoa tsa Mn valence le phello ea JaHN-Teller ea Mn3 +, e bakang mathata a kang liphapang tse sa tsitsang le tse ka khutlisetsoang morao. Peng Zhengshun, e bonts&39;ang hore ts&39;ebetso ea electrochemical ea lisebelisoa tsa electrode tse ntle tsa LiMn2O4 li kholo, &39;me RCT e sebelisoa e le mohlala: RCT ea LIMN2O4 e entsoeng ka mocheso o phahameng oa mocheso o tiileng o phahame haholo ho feta mokhoa oa sol gel,&39; me ketsahalo ena e ka lithium ion E kentsoeng ho li-coefficients tsa diffusion.

Lebaka ke haholo-holo ka lebaka la mekhoa e fapaneng ea maiketsetso bakeng sa crystallinity le morphology ea sehlahisoa. ● 3, litšobotsi tse tlaase tsa mocheso oa phosphate system positive electrode material LIFEPO4 ke &39;mele o ka sehloohong oa lisebelisoa tse ntle tsa betri ea hona joale ka lebaka la botsitso bo botle ba molumo le polokeho, ka thepa ea ternary. Mocheso o fokolang oa mocheso oa phosphate oa tšepe ke haholo-holo hobane thepa ka boeona ke insulator, conductivity ea elektronike e tlaase, lithium ion diffusion e futsanehile, e le hore ho hanyetsa ka hare ho betri ho eketsehe, polarization e phahame, tefiso ea betri le ho tsoa li koetsoe, kahoo mocheso o tlase Ts&39;ebetso ha e ntle.

Valley Yidi, joalo-joalo, ha u ithuta ho qosa le ho ntša boitšoaro ba LifePO4 ka mocheso o tlaase, ho sebetsa hantle ha Kulen ke 64% ho 96% le -20 ° C ho 55 ° C ho ea ho 0 ° C, &39;me motlakase oa ho ntša o tsoa ho 55 ° C 3.11V.

2.62V ea ho tsamaisa ho -20 ° C. XING et al, ho sibolloa, ka mor&39;a ho eketsoa ha lisebelisoa tsa nanocarbon conductive, thepa ea electrochemical ea LiFePO4 e fokotsehile, &39;me ts&39;ebetso e tlaase ea mocheso e ntlafatsoa; matla a ho ntša metsi a LiFePO4 ka mor&39;a phetoho ea 3.

40 V e ile ea oela ho 3.09V ho -25 ° C, ho fokotseha ho ne ho le 9,12% feela; &39;me katleho ea eona ea betri e ne e le 57.

3%, e phahameng ho feta 53.4% ​​ea sesebelisoa sa motlakase se seng nanocarbon ho -25 ° C. Haufinyane, LIMNPO4 e hohetse lithahasello tsa batho.

Phuputso e fumane hore LIMNPO4 e na le menyetla e phahameng (4.1V), ha e na tšilafalo, theko e tlaase, matla a maholo a khethehileng (170mAh / g), joalo-joalo. Leha ho le joalo, ka lebaka la conductivity e tlaase ea ion ea LIMNPO4 ho feta LiFePO4, hangata e sebelisoa ho nkela Mn sebaka ho theha LiMn0.

8Fe0.2PO4 tharollo e tiileng ts&39;ebelisong ea &39;nete ea karolo ea FE. Litšobotsi tsa mocheso o tlase oa lisebelisoa tse mpe tsa elektrode tsa betri ea lithium-ion li tebile haholoanyane ha li bapisoa le lisebelisoa tse ntle tsa elektrode, &39;me mocheso o tlase oa betri ea lithium ion o matla le ho feta, haholo-holo mabaka a mararo: ● Tefiso e tlase ea mocheso o phahameng le ho tsoa, ​​polarization ea betri e matla, tšepe e mpe Lithium e kentsoe haholo, mme sehlahisoa sa karabelo sa lithium ea tšepe ha e na motlakase ka kakaretso; ha e na motlakase ka kakaretso. Angoa ke mocheso o tlase;.

Boithuto ba tharollo ea mocheso o tlase oa electrolytic bo etsa phello ea ho fetisetsa Li + ka betri ea lithium ion, mme conductivity ea eona ea ionic le ts&39;ebetso ea sebopeho sa filimi ea SEI e na le phello e kholo ts&39;ebetsong ea mocheso o tlase oa betri. Ho khethiloe hore mocheso o tlase oa tharollo ea electrolytic o ikhethile haholo, ho na le matšoao a mararo a mantlha: conductivity ea ionic, lifensetere tsa electrochemical, le electrode reactivity. Boemo ba matšoao ana a mararo bo itšetlehile haholo ka thepa ea eona ea ho kopanya: solvent, electrolyte (lithium letsoai), addititive.

Ka hona, thuto ea ts&39;ebetso ea mocheso o tlase oa karolo ka &39;ngoe ea electrolyte, e bohlokoa haholo bakeng sa ho utloisisa le ho ntlafatsa ts&39;ebetso ea mocheso o tlase oa betri. ● EC-based electrolyte litšobotsi tse tlaase tsa mocheso ha li bapisoa le ketane ea carbonate, mohaho oa cyclic carbonate o haufi, o matla, o na le ntlha e phahameng ea ho qhibiliha le viscosity. Leha ho le joalo, polarity e kholo ea sebopeho sa annular e etsa hore hangata e be le kamehla e kholo ea dielectric.

EC solvent e na le dielectric e kholo kamehla, e phahameng ea ion conductivity, ts&39;ebetso e phethahetseng ea ho etsa filimi, e thibela ka katleho molek&39;hule ea solvent hore e se ke ea kenngoa, e le hore e be sebaka sa bohlokoa, e le hore boholo ba lisebelisoa tsa tharollo ea mocheso o tlaase oa electrolytic li be kholo, ebe li tsoakane le ntlha e tlaase ea ho qhibiliha ha molek&39;hule e nyenyane. ● Letsoai la lithium ke motsoako oa bohlokoa oa electrolyte. Letsoai la lithium ha le khone feela ho ntlafatsa conductivity ea ionic ea tharollo, empa hape le fokotsa sebaka sa ho arohana ha Li + ka tharollo.

Ka kakaretso, e kholoanyane ea Li + concentration ka tharollo, e kholoanyane ea conductivity ea ion. Leha ho le joalo, mahloriso a lithium ion concentration ka electrolyte ha e amane ka ho toba, empa ke mohala oa parabolic. Lebaka ke hore, motsoako oa lithium ion ka har&39;a motsoako o itšetlehile ka ho arohana ha letsoai la lithium ka har&39;a motsoako le matla a mokhatlo.

Boithuto ba mocheso o tlase oa electrolyte ntle le hore betri e entsoe ka boeona, &39;me lintlha tsa ts&39;ebetso ts&39;ebetsong ea sebele le tsona li tla ba le tšusumetso e kholo ts&39;ebetsong ea betri. ● (1) Tshebetso ea Boitokisetso YAQUB et al, phello ea mojaro oa electrode le botenya ba ho roala holim&39;a LINI0.6CO 0.

2 mn0.2O2 / graphite betri tshebetso e tlaase ea mocheso e senotse hore moroalo o monyenyane oa elektrode o monyenyane, lera le fokolang la ho roala le le lesesaane Ho molemo ho sebetsa ha mocheso o tlaase. ● (2) Boemo ba tefiso le ho lahla Petzl et al, phello ea boemo bo tlaase ba mocheso oa mocheso oa mocheso o fokolang bophelong ba potoloho ea betri e fumane hore ha botebo ba ho tsoa bo ka baka tahlehelo e kholo ea bokhoni, le ho fokotsa bophelo ba potoloho.

(3) Sebaka se ka holim&39;a metsi, sekoti, sekhahla sa electrode, ho koloba ha electrode le tharollo ea electrolytic, le tse ling tse joalo, tse amang mocheso o tlaase oa betri ea lithium ion. Ho phaella moo, phello ea mefokolo ea lisebelisoa le mekhoa ea ts&39;ebetso ea mocheso o tlaase oa betri e ke ke ea hlokomolohuoa. Ka hona, e le ho netefatsa ts&39;ebetso e tlaase ea mocheso oa betri ea lithium-ion, ho hlokahala hore u etse se latelang: ● (1) ho etsa filimi e tšesaane le e teteaneng ea SEI; ● (2) e tiisa hore Li + e na le coefficient e kholo ea ho jala ntho e sebetsang; ● (3) ) Electrolyte e na le conductivity e phahameng ea ion ka mocheso o tlaase.

Ho phaella moo, thuto e ka boela ea nka mokhoa o mong, &39;me leihlo le fetoleloa ho mofuta o mong oa betri ea lithium-ion - betri e tiileng ea lithium ion. Ha ho bapisoa le libeteri tse tloaelehileng tsa lithium-ion, libeteri tsohle tsa lithium ion tse tiileng, haholo-holo li-betri tsa lithium ion tse tletseng filimi, li lebeletsoe hore li rarolle ka ho feletseng bothata ba ho fokotsa matla le mathata a tšireletso a potoloho a sebelisoang mocheso o tlaase oa betri. Joale u tšoara libeteri tsa lithium joang mariha? 1.

Se ke oa sebelisa mocheso oa betri ea lithium sebakeng sa mocheso o tlase bakeng sa phello ea betri ea lithium, ho theola mocheso oa betri ea lithium, ho fokotsa ts&39;ebetso ea betri ea lithium, e lebisang ka kotloloho ho phokotso e kholo ea tefiso le ts&39;ebetso ea ts&39;ebetso, eo ka kakaretso, mosebetsi oa libeteri tsa lithium Mocheso o pakeng tsa -20 degrees -60 degrees. Ha mocheso o ka tlase ho 0 ° C, ela hloko hore u se ke ua lefella ka ntle, u ka e lefella, re ka nka betri ka kamoreng (hlokomela, u lule hole le ho cha !!!), Ha mocheso o le ka tlase ho -20 At ° C, betri e tla kena sebakeng sa boroko ka boeona &39;me e ke ke ea sebelisoa ka mokhoa o tloaelehileng. Kahoo mosebelisi oa leboea o bata haholo.

Ha ho na boemo ba ho tjhaja ka tlung. Ho sebelisa betri e setseng ka botlalo, hang-hang tjhaja letsatsi ka mor&39;a ho paka, ho eketsa ho tjhaja, le ho qoba lithium. 2, nts&39;etsapele mariha a tloaelehileng a tsamaeang, ha betri e le tlase haholo, re tlameha ho tjhaja ka nako, ho hlaolela tloaelo e ntle ea ho tsamaea, hopola, le ka mohla u se ke ua latela betri e tloaelehileng ho khutlela matla a betri ea mariha.

Ts&39;ebetso ea betri ea lithium ea mariha ea fokotseha, ho bonolo haholo ho baka tefiso e feteletseng, e ama bophelo ba betri hanyane, mme e baka kotsi ea mollo. Ka hona, ela hloko ho tjhaja ka mokhoa o sa tebang haholo mariha. Haholo-holo ho hlokahala hore u hlahisoe, u se ke ua paka koloi nako e telele, qoba ho feta tefiso.

3, u se ke ua lula hole le hopola hore u se ke ua lefella nako e telele, u se ke ua etsa hore e be bonolo, beha koloi nako e telele sebakeng sa tefiso, &39;me u ka khona. Ha tikoloho ea ho tjhaja nakong ea mariha e ka tlase ho 0 ° C, ha u tjhaja, u se ke ua tloha hole haholo, ho thibela maemo a tšohanyetso, ho sebetsana le nako. 4.

Ha u tjhaja, sebelisa &39;maraka o khethehileng oa tjhaja ea lithium betri e tletseng tjhaja e tlase, ho sebelisa lijaja tse tlase, ho ka baka tšenyo ea betri, esita le ho baka mollo. U se ke ua reka lihlahisoa tse sa tiisetsoeng tsa theko e tlaase, u se ke ua sebelisa lishaja tsa libeteri tse nang le asiti ea loto; haeba tjhaja ea hau e sa khone ho e sebelisa, emisa ho e sebelisa, u se ke oa lahleheloa. 5, ela hloko bophelo ba betri, phetoho e nakong ea bophelo ba betri ea lithium, mefuta e fapaneng ea bophelo ba betri, hammoho le mokhoa oa letsatsi le letsatsi oa tšebeliso, bophelo ba betri ha bo lekane, haeba koloi e theoha kapa e sa feleng Nakoana, ka kopo ikopanye le basebetsi ba tlhokomelo ea betri ea lithium ho sebetsana le motho ea lokisang betri ea lithium nakong e khutšoanyane, ka kopo ikopanye le basebetsi ba tlhokomelo ea betri ea lithium.

6, ho na le motlakase o motle bakeng sa mariha, e le hore u sebelise koloi bohareng ba selemo, haeba u se na betri e telele nako e telele, u tla hopola ho tjhaja 50% - 80% ea betri, &39;me ue tlose koloing,&39; me u etse ho tjhaja kamehla, hoo e ka bang khoeli e le &39;ngoe Ho lefella. Ela hloko: Betri e bolokiloe sebakeng se omileng. 7.

Beha betri ka nepo Se ke oa qoelisa betri ka metsing, kapa ho etsa hore betri e be mongobo; u se ke ua bokella mekato e fetang 7, kapa ua khelosa tataiso ea betri, lithium.