Penn: Muna da hanya mai sauri don cajin ƙwayoyin LiFePO4: +2 km/h. Lalacewa? Nisan kilomita miliyan 400!

Abubuwa

Kwayoyin LFP a matsayin dama ga motocin lantarki masu arha da inganci
- Nissan Leaf II a matsayin Porsche: kyakkyawan haɓakawa, babban caji mai sauri

Masana kimiyya daga Jami'ar Jihar Pennsylvania sun samo hanyar yin cajin batura masu sauri dangane da kwayoyin phosphate na lithium (LFP, LiFePO).₄). Godiya ga tsarin da ya dace, suna iya ɗaukar nisa har zuwa kilomita 400 a cikin mintuna 10 (+2 km / h), wanda yayi daidai da ƙarfin caji na kusan 400 C.

Kwayoyin LFP a matsayin dama ga motocin lantarki masu arha da inganci

Abubuwan da ke ciki

Kwayoyin LFP a matsayin dama ga motocin lantarki masu arha da inganci
- Nissan Leaf II a matsayin Porsche: kyakkyawan haɓakawa, babban caji mai sauri

Mun rubuta sau da yawa game da fa'idodin ƙwayoyin LFP: suna da arha fiye da NCA/NCM - kuma sun yi alkawari da kyau idan ya zo ga ƙarin rage farashin - sun fi aminci, ragewa a hankali, kuma suna ba da izinin hawan keke mai cikakken caji ba tare da tasirin tasiri ba. lalata. Lalacewar su shine ƙarancin takamaiman kuzari da ƙarancin ƙarfin haɓaka caji. Da alama cewa abubuwa da yawa sun faru kwanan nan a duka na farko (haɗin da ke ƙasa) da na biyu (ƙarin abun ciki na labarin).

> Guoxuan: Mun kai 0,212 kWh / kg a cikin sel na LFP, mun ci gaba. Waɗannan shafukan NCA/NCM ne!

Masu bincike na Pennsylvania sun sami hanya ƙara ƙarfin cajin baturi dangane da ƙwayoyin LFP... To, sun nade sel a cikin siraren nickel foil wanda aka haɗa da ɗaya daga cikin wayoyin baturi. Lokacin da caji ya fara, wutar lantarki yana gudana ta cikin su. Tsarin yana dumama sel (cikin baturi) zuwa digiri 60 ma'aunin celcius. kuma sai bayan haka ne aikin sake cika makamashi zai fara.

Tun da zafi baya fitowa daga cikin tantanin halitta, amma sakamakon ƙarin hita ne, babu wata matsala da ta fito fili game da ci gaban lithium dendrite.

Masu binciken sun ce tare da zazzafan kwayoyin halitta za su iya sake cikawa Kewayon tafiye-tafiye na kilomita 400 a cikin mintuna 10 (+2 400 km / h)... Ba za su iya yin alfahari da takamaiman ƙimar cajin wutar lantarki ba, amma la'akari da cewa ƙarfin baturi da ake so a halin yanzu ya dace da kewayon kilomita 400-500, Cajin ya kamata ya zama 4,8-6 C. Lokacin fitarwa - har yanzu tare da sel masu zafi - yayi alƙawarin samun damar samar da 300kW na wuta daga baturi 40kWh (7,5°C, tushen).

Babban cajin wutar lantarki dole ne ya kasance lafiya gabaɗaya ga sel da aka kwatanta. Masana kimiyya sun yi alkawari har zuwa kilomita miliyan 3,2, wato tare da kewayon sama (kilomita 400-500) rayuwar sabis 6-400 cikakken aiki hawan keke.

Nissan Leaf II a matsayin Porsche: kyakkyawan haɓakawa, babban caji mai sauri

Don fahimtar ma'anar duk sigogin da ke sama, bari mu saita su zuwa motar farko a gefen. Ka yi tunanin Nissan Leafa II tare da baturi na sama... Tare da ƙarfin [jimlar] na 40 kWh, baturin zai iya isar da wutar lantarki har zuwa 300 kW (408 hp), wanda, ko da asara, yana ba da kusan 250 kW (340 hp) akan ƙafafun.

Irin wannan mota, idan kawai za ta iya kula da motsi, da Yi kama da Porsche Boxster kuma zai ba da damar sake cika wutar lantarki har zuwa kusan 240 kW. Kuma baturin da ke yin zafi yayin tuƙi zai zama fa'ida, ba rashin lahani ba, saboda ba zai buƙaci a sake yin zafi ba don mafi girman inganci.

Hoton ganowa: misali, gwajin ƙwayoyin LFP (a) Jim Conner / YouTube