Mphamvu ndiye chinthu choyamba cha batri,lithiamu batire maselomphamvu otsika ndi vuto kawirikawiri anakumana zitsanzo, kupanga misa, momwe mwamsanga kusanthula zimayambitsa mavuto otsika mphamvu anakumana, lero kukudziwitsani zimene zimayambitsa otsika mphamvu maselo batire lifiyamu?
Kufanana kwa zinthu, makamaka pakati pa cathode ndi electrolyte, kumakhudza kwambiri mphamvu ya selo.Kwa cathode yatsopano kapena electrolyte yatsopano, ngati mayesero obwerezabwereza amawulula mphamvu ya lithiamu mpweya wochepa nthawi iliyonse yomwe selo iyesedwa, ndiye kuti ndizotheka kuti zipangizozo sizikugwirizana.Kusagwirizanaku kumatha kukhala chifukwa cha filimu ya SEI yomwe idapangidwa panthawi yomwe idapangidwa kuti ikhale yosakhala wandiweyani mokwanira, wandiweyani kwambiri kapena wosakhazikika, kapena PC yomwe ili mu electrolyte ikupanga graphite wosanjikiza, kapena kapangidwe ka selo losatha kutengera mtengo waukulu / kutulutsa kwamadzi chifukwa cha kukanika kwambiri kwapamadzi.
Ma diaphragms ndi chinthu chochititsa chidwi chomwe chingayambitse kuchepa kwa mphamvu.Tapeza kuti dzanja bala diaphragms kutulutsa makwinya mu kotenga mbali malangizo pakati pa aliyense wosanjikiza, kumene lifiyamu si mokwanira ophatikizidwa mu elekitirodi zoipa motero amakhudza mphamvu selo ndi kuzungulira 3%.Ngakhale kuti mitundu iwiriyi imagwiritsa ntchito mapindikidwe a theka-otomatiki pomwe makwinya a diaphragm ndi ocheperako ndipo mphamvu yake ndi 1% yokha, sichifukwa chosiyira kugwiritsa ntchito diaphragm.
Kusakwanira kwa mapangidwe a m'mphepete kungayambitsenso kuchepa kwa mphamvu.Chifukwa cha mphamvu ya zokutira zabwino ndi zoipa ma elekitirodi, kulakwitsa kwa mphamvu divider ndi zotsatira za zomatira pa mphamvu, m'pofunika kulola kuchuluka kwa mphamvu malire pokonza.Popanga malire a mphamvu, ndizotheka kusiya zotsalira pambuyo powerengera mphamvu yapachimake ndi njira zonse zomwe zili pakati pa mzere wapakati, kapena kuwerengera zowonjezera pambuyo pa zinthu zonse zomwe zimakhudza mphamvu zomwe zakhala zikuchitika pamtunda wotsika.Kwa zipangizo zatsopano, kuyesa kolondola kwa gram play ya cathode mu dongosolo limenelo ndikofunika.Kuchulutsa pang'ono, kuchuluka kwa ma charger, chochulukitsira / kutulutsa, mtundu wa electrolyte, ndi zina zambiri, zonse zimakhudza kasewero ka cathode gram.Ngati mtengo wapangidwe wa ntchito yabwino ya gramu ndi yapamwamba kwambiri kuti akwaniritse cholinga chomwe akufuna, izi zimagwirizananso ndi luso losakwanira lokonzekera.Palibe cholakwika ndi mawonekedwe a selo, kapena palibe cholakwika ndi deta yonse ya ndondomeko, koma mphamvu ya selo ndi yochepa.Choncho, zipangizo zatsopano ziyenera kuyesedwa kuti zikhale zolondola, chifukwa cathode yomweyi idzakhala ndi galamala yofanana ndi cathode kapena electrolyte.
Elekitirodi yoyipa kwambiri imathanso kukhudza momwe ma elekitirodi abwino amagwirira ntchito pamlingo wina, motero zimakhudza mphamvu ya selo.Kuchulukira koyipa sikuli "malinga ngati kulibe mvula ya lithiamu".Ngati kuchulukitsitsa koyipa kukuchulukirachulukira mpaka kutsika kwa mpweya wosakhala wa lithiamu, padzakhala kuwonjezeka kwa 1% mpaka 2% pakuchita bwino kwa gramu, koma ngakhale kuchulukitsidwa, kuchulukira koyipa kumakhalabe kokwanira kuwonetsetsa kuti mphamvu zotulutsa ndizokwera momwe zingathere.Pamene owonjezera zoipa elekitirodi ndi okwera kwambiri, ndi elekitirodi zabwino adzakhala ndi gawo m'munsi chifukwa kwambiri zosasinthika lifiyamu chofunika umagwirira, koma ndithudi Mwina izi zikuchitika pafupifupi palibe.
Pamene voliyumu ya jakisoni yamadzimadzi itsika, voliyumu yosungira madzi yofananira idzakhalanso yotsika.Pamene madzi posungira buku la selo ndi otsika, ndiye zotsatira za lithiamu ion embedding ndi de-embedding mu zabwino ndi zoipa maelekitirodi adzakhudzidwa, motero kuyambitsa otsika mphamvu.Ngakhale padzakhala kupanikizika kochepa pamitengo ndi njira zokhala ndi voliyumu yotsika ya jakisoni, lingaliro lotsitsa voliyumu ya jekeseni liyenera kukhala kuti silikhudza magwiridwe antchito a cell.Zachidziwikire, kutsitsa kuchuluka kwa kudzaza kumangowonjezera mwayi wocheperako chifukwa cha kuchepa kwamadzi mu cell, koma sichotsatira chosapeŵeka.Panthawi imodzimodziyo, pamene kumakhala kovuta kwambiri kuyamwa madzi, m'pamenenso ma electrolyte ochulukirapo ayenera kukhala kuti awonetsetse kukhudzana bwino ndi electrode panthawi yonyowetsa electrolyte.Kusakwanira kwa ma cell kumapangitsa kuti ma elekitirodi abwino ndi oipa akhale owuma komanso mpweya wochepa kwambiri wa lithiamu pamwamba pa electrode yoipa, yomwe ingakhale chifukwa cha kuchepa kwa mphamvu chifukwa cha kusungidwa bwino.
Ma elekitirodi owoneka bwino kapena oyipa angayambitse kutsika kwapakati.Elekitirodi yabwino itakutidwa pang'ono, mawonekedwe a pachimake chodzaza kwathunthu sangakhale achilendo.The elekitirodi negative, monga wolandira lifiyamu ayoni, ayenera kupereka chiwerengero chachikulu cha ophatikizidwa lifiyamu malo kuposa chiwerengero cha lithiamu magwero operekedwa ndi elekitirodi zabwino, apo ayi owonjezera lithiamu adzakhala precipitate pamwamba pa elekitirodi zoipa, chifukwa mu woonda wosanjikiza. za mvula yambiri ya lithiamu.Monga tanena kale, chifukwa cholemetsa choyipa cha elekitirodi sichingatengedwe mwachindunji kuchokera ku kulemera kwa kuphika kwa ma cores, kotero munthu akhoza kupanga kuyesera kwina kuti apeze kuchuluka kwa kulemera kwa ma elekitirodi kuti azindikire kulemera kwa ❖ kuyanika kwa mphira. ma electrode cores.Ngati ma elekitirodi olakwika apakati otsika ali ndi mpweya wochepa kwambiri wa lithiamu, kuthekera kwa electrode yosakwanira ndiyokwera kwambiri.Komanso, cathode kapena zoipa elekitirodi ❖ kuyanika mbali cathode kungachititsenso mphamvu otsika, ndi zoipa elekitirodi limodzi mbali ❖ kuyanika makamaka kuwala, chifukwa ngakhale zabwino elekitirodi ❖ kuyanika kulemera, ngakhale gilamu sewero lidzachepetsedwa, koma mphamvu okwana adzakhala. sizingachedwe, koma zikhoza kuwonjezeka.Ngati ma elekitirodi olakwika atakutidwa pamalo olakwika, kufananiza kwachibale kulemera kwake kwa mbali imodzi ndi iwiri mutatha kuphika, malinga ngati deta ili yofanana ndi mbali ya A ndi 6% yopepuka kuposa ❖ kuyanika mbali B. makamaka kudziwa vuto, ndithudi, ngati vuto la mphamvu otsika ndi lalikulu kwambiri, m'pofunika kupititsa patsogolo kachulukidwe weniweni padziko A/B mbali.Ngati vuto la kutsika kwapang'onopang'ono liri lalikulu, m'pofunika kupititsa patsogolo kachulukidwe weniweni wa mbali ya A / B.Kugudubuza kumawononga kapangidwe kazinthu, komwe kumakhudzanso mphamvu.The maselo kapena atomiki dongosolo la zinthu ndi chifukwa chachikulu chimene ali katundu monga mphamvu, voteji, etc. Pamene kachulukidwe a ma elekitirodi zabwino masikono kuposa ndondomeko mtengo, ndi elekitirodi zabwino adzakhala owala kwambiri pamene pachimake ndi dismantled.Ngati mpweya wabwino wa elekitirodi compaction ndi waukulu kwambiri, chinthu chabwino elekitirodi chidutswa n'zosavuta kusweka pambuyo mapiringidzo, amenenso kuchititsa otsika mphamvu.Komabe, monga kuphatikizika kwa elekitirodi kumapangitsa kuti chidutswacho chisweke chikangopindika, makina osindikizira a electrode odzigudubuza okha amafunikira kupanikizika kwambiri, motero pafupipafupi kukumana ndi kuphatikizika kwa electrode kumakhala kotsika kwambiri kuposa kuphatikizika kwa electrode.Pamene elekitirodi zoipa ndi tikaumbike, Mzere kapena chipika wa lifiyamu mpweya adzapanga pamwamba pa elekitirodi negative, ndipo kuchuluka kwa madzi zosungidwa pachimake adzakhala kwambiri yafupika.
Kuchepa mphamvu kungayambitsidwenso ndi madzi ochulukirapo.Low capacitance ndi zotheka pamene madzi ali electrode pamaso kudzaza, mame mfundo bokosi magolovesi pamaso kudzaza, madzi opezeka electrolyte kuposa muyezo, kapena pamene chinyezi anayambitsa mu de-aerated chisindikizo chachiwiri.Kufufuza kuchuluka kwa madzi kumafunika kupanga pachimake, koma madzi akamaposa mtengo wina, madzi owonjezera amawononga filimu ya SEI ndikudya mchere wa lifiyamu mu electrolyte, motero kuchepetsa mphamvu ya pachimake.The madzi okhutira kuposa muyezo wa selo zonse mlandu zoipa Inde kachidutswa kakang'ono bulauni.
Nthawi yotumiza: Aug-16-2022