Kūlana paʻanā pākahi lithium haʻahaʻa haʻahaʻahōʻike haʻahaʻa electrochemical hana ma haʻahaʻa wela.ʻO ka hoʻopiʻi ʻana i ka pākaukau lithium-ion ma ka wela haʻahaʻa e hoʻoulu i ka wela i ka hopena kemika o nā electrodes maikaʻi a maikaʻi ʻole, ka hopena i ka wela o ka electrode.Ma muli o ka paʻa ʻole o nā electrodes maikaʻi a maikaʻi ʻole i nā haʻahaʻa haʻahaʻa, maʻalahi ka hoʻoulu ʻana i ka hopena electrolyte e hoʻohua i nā ea a me ka ua lithium, no laila e luku ai i ka hana electrochemical.No laila, ʻo ka haʻahaʻa haʻahaʻa kahi hana inevitable i ka wā kahiko o ka pākaukau.
Ua haʻahaʻa loa ka mahana o Lithium-ion i ka mahana haʻahaʻa ma ka mahana haʻahaʻa, e hanaʻino i nā mea kūpono a maikaʻiʻole.Ke emi iho ka mahana o ka hoʻolima ʻana o ka pākaukau ma mua o ka wela o ka lumi, e hoʻohuli ka electrode maikaʻi o ka pākaukau a me ka wela, a ʻo ke kinoea a me ka wela i hana ʻia e hōʻiliʻili i ke kinoea i hoʻokumu ʻia i loko o ka electrode maikaʻi, e hoʻonui ai ke kelepona.Inā haʻahaʻa loa ka mahana i ka wā o ka hoʻokuʻu ʻana, e lilo nā pou i paʻa ʻole.I mea e mālama ai i ka hana o ka electrode maikaʻi ʻole a me ka electrode maikaʻi, pono e hoʻopiʻi mau ʻia ka pākaukau, no laila, pono e mālama ʻia ka mea hana electrode maikaʻi i kahi kūlana e like me ka hiki ke hoʻopiʻi.
E pohō wikiwiki ana ka mana o ka pākaukau i ke kaʻa uila haʻahaʻa a he hopena koʻikoʻi i ke ola pākaukau.ʻO ka haʻahaʻa haʻahaʻa haʻahaʻa e alakaʻi i ka hoʻololi nui o ka leo i nā electrodes maikaʻi a maikaʻi ʻole, a laila e alakaʻi i ka hoʻokumu ʻana o nā lithium dendrites a pēlā e hoʻopili ai i ka hana pākaukau.ʻO ka nalo ʻana o ka mana a me ka hoʻohaʻahaʻa ʻana i ka hiki i ka wā o ka hoʻoiho / hoʻokuʻu ʻana he kumu nui ia e pili ana i ke ola pākaukau, a ʻo ka decomposition o LiCoSiO 2 cathode a me LiCoSiO 2 cathode i nā wela kiʻekiʻe e hoʻohua ai i ke kinoea a me nā ʻōpū me ka electrolyte paʻa, e pili ana i ka ola pākaukau.ʻO ka pane ʻana o nā electrodes maikaʻi a maikaʻi ʻole me ka electrolyte i ka haʻahaʻa haʻahaʻa e hoʻohua ai i nā ʻōpū e hoʻopau i nā electrodes maikaʻi a maikaʻi ʻole i ka wā o ka pōʻai pākaukau, no laila e pohō koke ai ka mana o ka pākaukau.
ʻO ka hoʻolōʻihi ʻia o ke ola e pili ana i ke kūlana i hoʻokuʻu ʻia o ka pākaukau a me ka neʻe ʻana o ka lithium ion i ka wā e hoʻouka ai.ʻO ke kiʻekiʻe o ka lithium ion e kaohi i ka hana paikikala o ka pākaukau, aʻo ka haʻahaʻa lithium haʻahaʻa e keʻakeʻa i ka hana paikikala o ka pā.E like me ka hoʻopiʻi ʻana i ka haʻahaʻa haʻahaʻa e hana ikaika ai ka electrolyte, no laila e hoʻopilikia i ka hopena electrode maikaʻi a maikaʻi ʻole, ka mea e hoʻoulu ai i ka pilina ma waena o nā mea hana electrode maikaʻi a maikaʻi ʻole e hoʻoulu ai i ka electrode maikaʻi ʻole a hana i ka nui o ke kinoea. wai, pēlā e hoʻonui ai i ka wela o ka pākaukau.Ke emi iho ka nui o ka lithium ion ma mua o 0.05%, ʻo ke ola pōʻaiapili he 2 mau manawa / lā wale nō;i ka wā i ʻoi aku ka kiʻekiʻe o ka manawa o ka pākaukau ma mua o 0.2 A / C, hiki i ka ʻōnaehana pōʻai ke mālama i nā manawa 8-10 / lā, ʻoiai i ka haʻahaʻa haʻahaʻa o ka lithium dendrite ma mua o 0.05%, hiki i ka ʻōnaehana pōʻai ke mālama i nā manawa 6-7 / lā. .
I ka haʻahaʻa haʻahaʻa, e loaʻa ka wai i loko o ka electrode maikaʻi ʻole a me ka diaphragm o ka pākaukau Li-ion, kahi e alakaʻi ai i ka emi ʻana o ka hana pōʻaiapuni a me ka hiki ke hoʻopiʻi o ka pā;ʻO ka polarization o ka mea electrode maikaʻi e hoʻopōʻino i ka deformation brittle o ka mea electrode maikaʻi ʻole, ka hopena o ka lattice instability a me ke ʻano o ka hoʻoili kālā;ʻO ka evaporation, volatilization, desorption, emulsification a me ka ua o ka electrolyte e alakaʻi pū i ka emi ʻana o ka hana pōʻai o ka pā.I loko o nā pākiki LFP, e emi mālie ana ka mea hana ma ka ʻili o ka pākaukau e like me ka piʻi ʻana o ka helu o ka uku a me ka hoʻokuʻu ʻana, a ʻo ka hōʻemi ʻana o nā mea hana e alakaʻi i ka emi ʻana o ka hiki ke pā;i ka wā o ka hoʻopiʻi a me ka hoʻokuʻu ʻana, e like me ka piʻi ʻana o ka nui o ka hoʻopiʻi a me ka hoʻokuʻu ʻana, hoʻohui hou ka mea hana ma ka interface i kahi ʻano paʻa paʻa a hilinaʻi hoʻi, ʻoi aku ka lōʻihi o ka pākaukau a palekana.
Ka manawa hoʻouna: Nov-15-2022