Lan mooy LiFePO4 ci batëri litium?
Duggal ci litium Iron matterals
Fosphate fer lithium (formule molekulaar LiFePOPO) phosphate fer litium, LFP, ñu xamee ko ci phosphate fer lithium wala phosphate litium) muy lu ñuy jëfandikoo ci litium-on. Màndarga yi ci nekk mooy amul ay mbir yu am solo yu melni cobalt wala nickel, njëgu macceer bu bees bi daa tuuti; ak karbon, litium, ak wen bari nañu ci crust suuf si, te loolu mën na jàppale marse bi lu ëpp benn milioŋ ci ton ci at mi. Ci wàllu cathode, fosfat fer litium amna voltage buy liggéey bu yam (3.2 V), kàttan gu bari (170 mAhh/g), doole decharge bu kawe, kàttan sarse bu gaaw, ak dundu gu gudd, ak stabilite bu baax ci kawe {5} tampo ak kawe {6} } } Ñàkka am ci environmaa yi.
Kristal phosphate fer litium bi bokk na ci benn xeetu oliwil. Ci mineroo, ñu tuddee ko ñatti yoon, mu joge ci baat bu Grek bi ak lylon. Ci ores, melo bi mën na nekk gray, xonk-br, maron, wala ñuul, waaye produit yi dañu ñuul wala gray {3}black. Yenn jumtukaayi mineraal yi dañuy am phosphate fer litium, waaye grade bi daa wàññeeku te yeggul ci ni ñuy jëfandikoo. Fosphate fer lithium bokk na ci kategori phosphate composite, te formula chimique bi gëna mag dafa wara nekk LiMPPO₄, fu M mën nekk metal bu am njariñ, boole ci Fe, Co, T, ak ñoom seen liggéeyukaay Lithium fer bu am litium, nit ñi dañu nekk ci defar phosphate fer litium bi ni benn phosphate fer jumtukaay. Waaye, ci composé yi am structure oliveine, fosfat fer litium du benn bi ñu mëna jëfandikoo ci katode ci litium-ion. Sunu sukkandikoo ci xam-xam bi am ci jamono jii, amna LiMnPO₄, LiMnFePO₄, LiVPO₄, LiCoPO₄, LiCoPO₄, ak yeneen mbir yu bari.
Lithium bi cosaanoo mën nañu ko topp ci 1996, bi sosiete telekomunications ci Japon NTT njëkka gis ni AMPfo€ (A mooy alkali metal, M mooy Co wala Fe) ak structure olivine, ci boole LiFeCoPO€, mën nañu ko jëfandikoo ni litium {1}i batëri kato. Ginaaw loolu, kuréel gi yor gëstu ci Goodenough ci Massachusetts Institute of Technology ci Etats Unis, bi ñuy jàngat composé yi, ni macceer phosphate fer lithium amna moomeel buñ mëna delloo lithium {3}ion (Li⁺) intercalation ak deintercalation. Bisu 23 awril, 1997, Universite bu Texas ci Austin dafa def benn patent bu tuddu "Cathode ay mbir yuñ mëna sarse ngir sarse ci ñaareelu batëri litium (WO1997010541), di màndargaal ndoortelu monopole ci wàllu phosphate fer.
Li ñuy siiwal ci wàllu ilineur { 0}} phosphate (LiMPPO₄) ci Etats Unis ak Japon, dafa jël gëstu bu xóot, ba noppi gëna gaaw ci liggéey bi. Buñu ko méngale ak litium -ion batëri cathode-spel-spalel- oxide litium manganese oxide (LiMn oxide (LiMn €) ak {LiCO€ oxide cobalt cobalt (LiCoO€) Ci anam wu gëna mag, kaaraange dafa gëna baax, muy gëna am solo ci gëstukat yi ak ci liggéey bi.
Gëstu yiñ amal ci at yii weesu, lithium fer phosphate fer amna ngëneel { Écours-crystallized structure oliveine, ak lithium-ion chaine diffusion yi wuute nañu ak yi ci macceer katod yi. Macceer cathode yu cosaan yi dañu am ay xeeti ion yu lalu ci lithium, loolu mooy tax ion litium yi mëna dem fu gaaw ci diggante couche yi wala ci chaine yu gëna mag, loolu mooy tax macceer yi di mëna def ci decharge bu baax. Waaye lithium -ion chaine diffusion ci litium phosphate phosphate phosphate fer ñooy benn {5}dimensional, loolu dafay tekki ni ci biir kristal bi amna "tunnel" rek ci litium {6 }oon diffusion, kon lithium-on migraasioŋ dafay yeex te diffusion diffusion bi daa gàtt. Rawatina ci anam yu bari- ions de décharge, ion litium yi ci biir mënu ñu dem ci jamono, loolu mooy jur polarisasioŋ electrochimique bu am solo.
Batëri yi mën nañu leen defar ci jëfandikoo materiel phosphate fer litium bu sell ngir firndeel li ñu wax ci kaw. Jàngat yi dañu wane ni kàttan gi ñuy jëfandikoo ci kàttanu phosphate fer fer bu sell bi dafa wàññeeku lool, te batëri bi dafay gaawa yàqu ci diiru cyclage bi. Figure 2.1 dafay wane ni ñuy defee welo ci lithium- milioŋ ci selul bi bindkat bi defar, jëfandikoo fosfor fer bu am litium bu sell (te amul coating karbon). Mën nañu gis ni ginaaw lu tollu ci 15 charge–dicharge, kàttanu batëri bi dafa yàqu lu ëpp 20%. Kon, materiel fosfi fer fer bu sell bi mënul nekk lithium- system batëri.
Ci atum 2000, Hydro- Québec (H{2}Q), njariñu réew mi ci Canada, mooy ki njëkka def ay brevet ci phosphate fer litium ak ay mbir yu ñuy jëfandikoo, lu ci melni jëfandikoo coating karbon ci phosphate fer litium. Lithium bi moo may phosphate fer fer ngir mëna am kàttan gu bari, ba noppi yokk dundu cycle bi ba ëpp 2000 cycle. Loolu mooy ndoorte li ci liggéey bi ci phosphate fer litium ci wàllu cathode.
