Lan mooy electrolyte bi ci batëri lithium?

Lan mooy electrolyte bi ci batëri lithium?

electrolyte

Electrolyte bi ci biir lithium- ion mooy porte ion yi ci biir batëri bi. Dafay faral di boole xorom litium, solvant organik, ak yokk, ni ñu ko wane ci nataal 7{3} 4. Elektrolyte amna solo bu am solo ci amal ay ion yu am solo diggante electrode positif ak negatif ci batëri litium {5} ion, ngir mëna am njariñam lu melni voltage bu kawe ak energie bu bari. Electrolyte yi dañu leen di faral di defaree ci anam wu amul benn werante, ak ci anam yu bari yu bawoo ci solvant organik yu kawe, xorom litium, ak yokk ci yokk. Doonte jumtukaayi electrode yi ñooy wane ni batëri bi di doxee, electrolyte bi dafay wane ni àdduna bi di doxee, tàngoor wu bari ak tàngoor wu woyof, ak kaaraange. composition bu njëkk bi ci electrolyte bi mingi wéy di nekk; innovation dafay gëna bari ci defar ay xorom ak ay yokk ci lithium ak ay yokk-xol, ak itam xam-xam bu gëna xóot ci anam yi ñuy doxalee ci wàllu chimik ak mekaniism yi ci biir batëri lithium-ion.

Barina xeeti xorom yu bari, ni ñu ko wane ci nataal 7{1}} 5, waaye ñu néew lañu jëfandikoo ci batëri litium-ion yi ñuy jaay. Benn xorom bu baax ci litium bi dafa wara am màndarga yii:

1) Diplôme association bu suufe, di seey ci solvant organik yi, loolu mooy tax electrolyte bi di am doole bu bari.

2) Anion yu am antioxydant ak wàññi; produit yu wàññeeku yi dañuy yombal sos filmu SEI bu dëgër, bu woyof, bu woyof.

3).

4) Liggéeyu waajal bu yomb, njëg bu yomb, amul-y ak polusioŋ- amul.

LiPF6 mooy xorom lithium biñ gëna jëfandikoo. Doonte màndarga yi mu am ci benn-benn nekku ñu ci li gëna fës, waaye dafay wane performance bu baax ci electrolyte yu am carbonate. LiPF6 amna njariñ yu am solo yii:

1) Solubilite buy yàgg ak yoon ionic bu kawe ci biir solvant yu amul-aqueous.

2) Mën na nekk filmu passivation bu dëgër ci kaw suuf si ciy dajale ay foil aluminium.

3) Dafay defar benn filmu SEI bu dëgër ci kaw surfaasu electrode grafite ak solvant carbonate.

Waaye, LiPF6 amna stabilite termik bu baaxul, te mën nañu ko dindi. Produit yi mën nañu yàq filmu SEI ci kaw surfaasu electrode bi, di dindi komponent electrode positif yi, ba noppi di indi yàqu-yàqu ci diiru cyclage bi.

LiBF itam xoromu xorom la bu ñuy jëfandikoo. Buñu ko méngale ak LiPF6, LiBF amna tàngoor wu gëna yaatu ci liggéey bi, gëna kawe- température bu gëna kawe, ak gëna kawe- température. LiBF dafa am yoon wu rëy, palanteer bu yaatu ci electrochimique, ak stabilite termik bu baax. Njariñam bi gëna mag mingi ci filmam- yi, ndax mën na bokk ci sos filmu SEI.

Ci anam wu jaar yoon, LiDFOB dafa am genn-wàll {- molecules yu LiBOB ak LiBF, boole ci njariñu filmu bu baax- di forme ay màndarga LiBOB ak ngërëm bu baax bi ci LiBOB. Buñu ko méngale ak LiBOB, LiDFOB moo gëna am solvant ci solvant carbonate lineaire ak doxalinu electrolyte bu gëna rëy. - température ak- température moo gëna baax LiPF4, te amna lëkkaloo bu baax ak kathode batëri bi, di defar filmu passivation ci kaw surface aluminium ak di tere oxidation electrolyte.

CF₃SO₂ kuréel yi ci structure LiTFSI amna electron bu dëgër {0} efekt buy gëna yokk, biy gëna yokk delocalisation bi ci charge negatif bi ba noppi wàññi boole ion yi, mu jur solubilite bu bari ci xorom si. Rax ci dolli, LiTFSI amna yoonale kuuraŋ bu bari, tàngoor wu bari ci tàngoor wi, te du yomb hydrolyse; waaye, dina am courant aluminium bu dëgër ci voltage yi ëpp 3.7V.

Atom fluore yi ci molecule LiFSI amna electron - di am màndarga yi, loolu mooy tax charge negatif bi ci N, mu jur association ion bu néew doole ak dissociation bu yomb ci Li+, loolu mooy waral ñu koy def.

LiPO2F2 dafay wane performance bu woyof {- te itam dafay gëna yokk- température bi ci electrolyte bi. Ci yokk, mën na nekk filmu SEI bu am LixPOyFz ak LiF ci kaw surfaasu electrode bu baaxul bi, loolu dafay wàññi impedance interfacial bi ci batëri bi ak gëna mëna liggéey ci batëri. Waaye, LiPO2F2 itam dafay am lu melni lu woyof.

Li gëna am solo cielectrolyte liquidmooy solvant organik, biy séddale xorom litium yi, ba noppi di joxe porte ion litium. Benn solvant organik bu baax ngir lithium- elektrolyte batëri bi dafa wara méngoo ak anam yii:

1) Dielectric bu bari mën na nekk lu am solo te dëgër ci xorom lithium.

2) Punt bu woyof ak point de chauffage bu kawe, mën nañu nekk ci biir ndox ci kaw tàngoor wu yaatu.

3) Viscosité bu woyof, yombal lithium-ion.

4).

5) Point flash bu kawe, kaaraange gu baax, njëg bu yomb, non-pot ak non-pol.

Soldaari organik yu bari yi ñuy jëfandikoo ci lithium- elektrolytes batëri dañu leen di xaaj ci solvant yu am carbonate ak solvant ether organique, ni ñu ko wane ci nataal 7{2} 6. Ngir am electrolyte batëri lithium-ion bu kawe, solvant bu am ñaari wala lu ëpp solvant organik lañuy faral di jëfandikoo, loolu mooy tax ñu mëna mottali seen biir, ba noppi ñu mëna def seen liggéey bu gëna baax. Màndarga yiñ gëna xam ci wàllu physique ci solvant yu am carbonate yu ñu bokk ñu ngi ko wane ci Tableau 7-1.

Tablo 7-1 Moomel yu am solo ci wàllu solvent yu mag

Soldaar yi ci wàllu ether organik ñooy gëna am ay ether yu melni 1,2{4}}dimethoxypropane (DMP), dimethoxymethane (DMM), ak ether glycol ci ether (DME), ak ethers cyclic lu melni tetrahydrofuran (THF) ak 2{6) ak 2{6) ak 2 {6-THF). Ci wàllu solvant ether, lu chaîne karbon bi di gëna gudd, gëna dëgëral stabilite chimique bi, waaye lu viskosite bi di gëna bari, ak limu lithium-ion di dem. Ethylene glycol ether ether ether mën na nekk chelate bu dëgër (LiPF6DME) ak hexifluorophosphate litium, di wane doole bu dëgër ci xorom litium, te mu jur yoon electrolyte bu bari. Waaye, DME amna stabilite chimique bu baaxul te mënul nekk filmu passivation bu dëgër ci kaw macceer electrode negatif bi.

Soldaari karbonaat yi ñooy karbonate cyclic yu melni carbonate propylene (PC) ak karbonate etilene (EC), ak karbonate chaîne yu melni karbonate dimethyl (DMC), ak karbonaat ethyl (EMC). Carbonates cyclic dañu am constant dielectric bu rëy, gëna yombal xorom lithium, waaye amna ñu itam viscosité bu bari, loolu moo jur limu lithium {1}rime migraasioŋ. Carbonates chain yi dañu am solubilité u kalime bu woyof te néew doole, waaye viskosite bu néew ak debit bu baax, di yombal lithium {3} ion.

Xeetu xal-retardant yi ngir lithium-ion electrolytes ñu ngi ko wane ci nataal 7{3} 7. Inditif yi, ñu koy jëfandikoo ci limu bari, amna njeexital yu am solo, te nekk na anam wu yomb te baax ngir gëna mëna liggéey lithium {5}oon. Soo yokke benn dose bu ndaw ci limuy yokk ci electrolyte ci batëri lithium {(6}}on, yenn màndarga yi ñuy def ci batëri mën nañu ko gëna baaxal, lu ci melni kàttanu reeverse, electrode/electrolyte mën nañu ko jëfandikoo, performance cycle, tolluwaayu liggéey, def liggéey bu am solo ci lithium {8}on batëri. Lithium-ion bi gëna baax ci electrolyte bi dafa wara am ñeenti màndarga yii:

1) solubilite bu rëy ci biir solvant organik yi.

2) Benn xaalis bu ndaw mën na yokk bu baax benn wala lu ëpp ci màndarga yi.

3) Amul benn reaction bu mëna lore ak yeneen composant batëri yuy indi jafe-jafe ci batëri bi.

4) Njëg bu wàññeeku, amul- toxisite wala toxisite bu néew.

Buñu sukkandikoo ci seen fonction, mën nañu leen xaaj yokk ci ay yokk-yoon, yokk aar ci aar, yokk SEI, filmu SEI, filmu SEI- di jëfandikoo ay yokk ci katod, kaaraange katode, LiPF6 stabilizers, ak yeneen mbir yu ñuy jëfandikoo.

Yokkateg yokkute ci liggéey dafay gëna yombal limu lithium {- batiir yi ci lëkkaloo ak ion electrolyte, gëna dooleel dissolution xorom lithium, ak yokk doxalinu electrolyte. Ndax li ñuy yokk ci yoon yi dafay liggéey ci reaction coordination, ñu ngi leen di woowe itam ligand, ñu xaaj ko ci ligand anionic, ligand sitionic, ak ligand yu amul benn werante ci ion yiy jaxasoo.

Yokkateg aaru aar ci overcharge dafay joxe aar bu ëpp solo wala yokk tolerans bu ëpp. Dañu leen di xaaj ci anam wu ñuy yokk ci redox ak ay yokk monomer. Fi ñu tolli nii, redox yi dañuy gëna bari ay anisole, ñu am potëlu redox yu bari ak solubilite bu baax. Yokkateg monomer dafay def reaction polymerisation ci biir voltage bu kawe, dindi gaz yi, ak polymer yi dañuy muur surface katod bi, dagg charge bi. Yokkateg monomer dafay gëna am ay composé aromatic yu melni xylene ak phenylcyclohexane.

Flame retardant yi ñuy yokk dañuy doxal ci yokk point ignition bu electrolyte bi wala ñu dindi reaction radical radical bi di tere lakk. Seen xeetu nit ñu ngi feeñ ci nataal 7{2} 8. Yokk retardant xal yi bokk na ci anam yi gëna am solo ngir wàññi tàngooru electrolyte bi, yaatal tàngooru liggéey bi ci batëri litium-ion, ba noppi gëna baaxal seen liggéey. Xeetu jëfu jëf yu retardant yiy yokk ci xal yi dañu gëna am solo:

1) Soo defaree benn layer buy isoler diggante fasu gaz bi ak fase condensé bi, dañuy tere lakk ci fase condensed ak gaz.

2) Dañuy jàpp radical yi ci jamonoy reaction combustion, di jeexal reaction radical radical biy tere reaction combustion bi am ci diggante fase gaz yi.