ʻO nā ʻōhua Li-ion kokoke i nā wahi āpau.Hoʻohana ʻia lākou i nā noi mai nā kelepona kelepona a me nā kamepiula i nā kaʻa hybrid a me ka uila.Hoʻonui nui ʻia nā pākahi Lithium-ion i nā noi nui e like me Uninterruptible Power Supplies (UPSs) a me nā Pūnaehana Pūnaewele Pūnaewele Pūnaewele (BESSs).
ʻO ka pākaukau kahi mea i loaʻa i hoʻokahi a ʻoi aʻe paha nā kelepona electrochemical me nā pili waho no ka hoʻoikaika ʻana i nā mea uila.Ke hāʻawi ʻia nei ka mana uila, ʻo kāna pahu maikaʻi ʻo ka cathode, a ʻo kāna kumu ʻino ka anode.ʻO ka pahu i hōʻailona ʻole ʻia ke kumu o nā electrons e kahe ana ma kahi kaapuni uila waho a i ka terminal maikaʻi.
Ke hoʻopili ʻia kahi pākaukau i kahi haʻahaʻa uila waho, hoʻololi ka hopena redox (reduction-oxidation) i nā reactants kiʻekiʻe i ka ikehu haʻahaʻa, a hāʻawi ʻia ka ʻokoʻa manuahi i ka kaapuni waho e like me ka ikehu uila.Ma ka mōʻaukala, ʻo ka huaʻōlelo "battery" i kuhikuhi pono ʻia i kahi mea i haku ʻia me nā cell he nui;akā naʻe, ua ulu ka hoʻohana ʻana e hoʻokomo i nā mea i haku ʻia i hoʻokahi kelepona.
Pehea e hana ai ka pākaukau lithium-ion?
ʻO ka hapa nui o nā pākahi Li-ion kaʻana like me ka metala oxide positive electrode (cathode) i uhi ʻia ma luna o kahi ʻohi alumini o kēia manawa, kahi electrode maikaʻi ʻole (anode) i hana ʻia mai ke kalapona/graphite i uhi ʻia ma kahi ʻohi keleawe o kēia manawa, kahi mea hoʻokaʻawale a me nā electrolyte i hana ʻia ka paʻakai lithium i loko o kahi mea hoʻoheheʻe organik.
ʻOiai e hoʻokuʻu ana ka pākaukau a hāʻawi i kahi au uila, lawe ka electrolyte i nā ion lithium i hoʻopiʻi maikaʻi ʻia mai ka anode a hiki i ka cathode a me ka hope ma o ka mea hoʻokaʻawale.ʻO ka neʻe ʻana o nā ion lithium e hana i nā electrons manuahi i loko o ka anode e hana i ka uku ma ka ʻohi ʻohi maikaʻi.A laila, kahe ke au uila mai ka ʻohi o kēia manawa ma o kahi mea hana e hoʻohana ʻia (kelepona, kamepiula, a me nā mea ʻē aʻe) i ka ʻohi o kēia manawa ʻino.Hoʻopaʻa ka mea hoʻokaʻawale i ke kahe o nā electrons i loko o ka pākaukau.
I ka wā o ka hoʻouka ʻana, hoʻohana ʻia kahi kumu mana uila waho (ke kaapuni hoʻopiʻi) i ka over-voltage (ʻoi aku ka nui o ka volta ma mua o ka hana ʻana o ka pākaukau, o ka polarity hoʻokahi), e koi ana i kahi au e hoʻouka ai e kahe i loko o ka pā mai ka maikaʻi a i ka electrode maikaʻi ʻole. ʻo ia hoʻi ma ka ʻaoʻao ʻē aʻe o kahi au i hoʻokuʻu ʻia ma lalo o nā kūlana maʻamau.A laila neʻe ka lithium ion mai ka maikaʻi i ka electrode maikaʻi ʻole, kahi i hoʻokomo ʻia i loko o ka mea electrode porous i kahi kaʻina i kapa ʻia ʻo inter-calation.
Ka manawa hoʻouna: Iune-26-2022