Mu mawonekedwe a kristalo a Lifepo4, atomu ya okosijeni imayikidwa mwamphamvu m'magulu asanu ndi limodzi.PO43-tetraonal ndi FEO6 octopus amapanga mafupa ozungulira a kristalo.LI ndi Fe amatenga kusiyana pakati pa octopus, ndipo P amatenga kusiyana kwa tetraonal.FE imakhala pamalo omwe amapezeka pakona ya octopus, ndipo li amakhala mbali ya octopus.Octopus ya FEO6 imalumikizidwa wina ndi mnzake pa BC pamwamba pa kristalo, ndipo mawonekedwe a octopus a Li6 pa B -axis malangizo amalumikizidwa ndi unyolo.1 Feo6 octopus ndi 2 LiO6 octopus ndi 1 PO43-tetraonal co-edge.
Chifukwa cha kusagwirizana kwa netiweki ya FEO6 co-edge octopus, madutsidwe amagetsi sangathe kupangidwa;panthawi imodzimodziyo, PO43-tetraon imangokhala ndi kusintha kwa voliyumu ya lattice, yomwe imakhudza kutaya madzi m'thupi ndi kufalikira kwamagetsi kwa LI +, zomwe zimatsogolera kumagetsi amagetsi ndi kufalikira kwa ion kwa LIFEPO4 zabwino zakuthupi ndi kufalikira kwa ion.Kuchita bwino ndikotsika kwambiri.
The theoretical kuposa batire ya Lifepo4 ndi yapamwamba (pafupifupi 170mAh/g), ndipo nsanja yotulutsa ndi 3.4V.LI+ Retinate mphamvu pakati pa zabwino ndi zoipa bipolar kukhazikitsa kulipiritsa ndi kukhetsa, ndipo makutidwe ndi okosijeni zimachitika pa kulipiritsa.Li + amachoka pamtengo wabwino, wophatikizidwa mumtengo woipa kudzera mu electrolyte, ndipo chitsulo chinasintha kuchokera ku Fe2 + kupita ku Fe3 +, ndipo kukhudzidwa kwa okosijeni kunachitika.
Mbali yakumanzere ya batri ya lithiamu iron phosphate ndi electrode positive yopangidwa ndi lifpo4 material ya olive structure, yomwe imalumikizidwa ndi electrode positive ya batire yokhala ndi zojambulazo za aluminiyamu.Kumanja ndi electrode negative wa batire wopangidwa ndi carbon (graphite), amene olumikizidwa kwa elekitirodi negative wa zojambulazo mkuwa ndi batire.Pakatikati pali diaphragm ya polima, yomwe imalekanitsa electrode yabwino ndi electrode yolakwika.Ma ion a lithiamu amatha kukhala ma elekitironi kudzera pa diaphragm ndipo sangathe kudutsa diaphragm.Batire imayendetsedwa ndi electrolytes, ndipo batire imatsekedwa ndi chipolopolo chachitsulo.
Kuyankha ndi kutulutsa kwa mabatire a lithiamu iron phosphate kuli pakati pa Lifepo4 ndi FEPO4.Panthawi yolipira, LIFEPO4 pang'onopang'ono inalekanitsidwa ndi lithiamu ion kupanga FEPO4.Pa ndondomeko kumaliseche, ndi lithiamu ion ophatikizidwa FEPO4 kupanga LIFEPO4.
Pakutha kwa batri, ma ion a lithiamu amasamuka kuchokera ku makristasi achitsulo a phosphate kupita pamwamba pa kristalo.Mchikakamizo cha munda magetsi, kulowa electrolyte, ndiye kudutsa diaphragm, ndiyeno kusamukira pamwamba pa kristalo graphite mwa electrolyte, ndiyeno ophatikizidwa mu graphite lattice.
Pa nthawi yomweyo, zamagetsi conductive zotayidwa zojambulazo elekitirodi umayenda kwa elekitirodi zabwino, ndi mkuwa zojambulazo wokhometsa ukuyenda mwa mzati khutu, batire zabwino ndime, dera kunja, negative elekitirodi ndime, ndi makutu zoipa batire negative elekitirodi, ndi ndiye amayenderera kwa litteria negative elekitirodi , Pangani negative elekitirodi mlandu kuti bwino.Lithiamu ayoni amasandulika kukhala chitsulo phosphate pambuyo pa lithiamu iron phosphate dehydrated.
Batire ikatulutsidwa, ayoni a lithiamu amachotsedwa mu kristalo wa graphite, kulowa mu electrolyte, kenako ndikudutsa pa diaphragm, amasamukira pamwamba pa lithiamu iron phosphate kudzera mu electrolyte, kenako ndikuyiyikanso mu latch ya lithiamu. iron phosphate.
Panthawi imodzimodziyo, chojambulira chamkuwa chimadutsa kumagetsi olakwika a meridian yamagetsi, kupyolera muzitsulo zotayidwa zotayidwa za aluminiyamu zojambulazo za khutu la polar, ndime yolakwika ya batri, dera lakunja, ndime yabwino, ndi khutu labwino la polar ku batri.Mitengo ya lithiamu imapangitsa kuti mtengowo ukhale wabwino.Lithium ions amalowetsedwa pambuyo pa makristasi a iron phosphate, ndipo iron phosphate imasinthidwa kukhala lithiamu iron phosphate.
Nthawi yotumiza: Aug-07-2023