Kutheni ibhetri ye-lithium iya kwenzeka, yintoni imbangela yedrum yebhetri ye-lithium?

2022/04/08

Umbhali :Iflowpower-UMboneleli weSikhululo saMandla esiphathwayo

I. Isizathu sebhetri ye-lithium-ion sisizathu sesizathu sesizathu se-lithium ion ibhetri. Uhlobo lokuqala: inkqubo yokuvelisa umenzi Ingxaki ibangelwa kubakhiqizi abaninzi, abaninzi abavelisi baneendleko ezifanelekileyo, ukwenzela ukuba indawo yokuvelisa imveliso imbi, ukusetyenziswa kuya kupheliswa umatshini wezixhobo Linda, ukwenzela ukuba ukugquma kwebhetri kungalingani, kunye namasuntswana othuli. zixutywe kwi-electrolyte.

Ezi kusenokwenzeka ukuba zenze iipakethi zebhetri ye-lithium-ion kusetyenziso lwabasebenzisi, nokuba yingozi ngakumbi. Okwesibini: Uhlobo lwesibini lwemikhwa yokusetyenziswa kwansuku zonke kukuba umsebenzisi ngokwakhe, ukuba umsebenzisi usebenzisa ukusetyenziswa okungafanelekanga xa esebenzisa iimveliso zebhetri ze-lithium-ion, ezifana nokugqithiswa kwentlawulo phezu kokukhutshwa, okanye ukusetyenziswa okuqhubekayo kwindawo enzima kakhulu, kunokwenzeka ukuba yenza kube nokwenzeka ukwenza ibhegi yobukho bebhetri yeLithium-ion. Okwesithathu: Ikhefu lemveliso yexesha elide elingenamsebenzi kwaye lingafanelekanga, ukusebenza kwasekuqaleni kuya kuwa, ibhetri ayisetyenziswanga ixesha elide, kwaye ke akukho nkqubo yokulondoloza engcono.

Xa ingasetyenziswa emoyeni exposure elide, kwaye amandla igcwele. Ekubeni umoya uqhuba umbane, ixesha lide kakhulu, lilingana nokudibanisa ngqo kunye ne-electrode efanelekileyo kunye ne-negative yebhetri, kwaye isiphaluka esifutshane esingapheliyo senziwe. Nje ukuba isekethe emfutshane iya kufudumala, ukubola kwe-electrolyte kuye kufakwe igesi, okukhokelela kwingxowa yegubu.

Izinto eziphathekayo ze-electrode zinomlinganiselo omkhulu (ngokubanzi kwi-70% ukuya kwi-80%), kuba ukusebenza kwezinto ezintle ze-electrode kuchaphazela ngokuthe ngqo ukusebenza kwebhetri ye-lithium ion, kwaye iindleko ziphantsi ngokuthe ngqo. Izinto ezilungileyo ze-electrode zibalwa kwi-30% ukuya kwi-40% yebhetri ye-lithium ion, kwaye iphinda ichaphazele ngokuthe ngqo ubuninzi bamandla kunye nokusebenza kwebhetri ye-lithium ion. Isixhobo esibi se-electrode siqulunqwe yinto ehambelana ne-electrode ephantsi, kwaye inomthamo ophezulu ophezulu kunye nentlawulo engcono kunye nokukhutshwa, ngaloo ndlela igcina ubungakanani obuhle kunye nokuzinza komatshini ngexesha le-lithium ye-cell (akukho deformation enzima).

Izinto ezimbi ze-electrode zibalulekile ukuchaphazela ukusebenza kakuhle kwebhetri ye-lithium-ion, kunye nokusebenza kwezinto ezimbi ze-electrode nazo zichaphazela ngokuthe ngqo ukusebenza kwebhetri ye-lithium-ion. Izinto eziphathekayo ze-electrode zibandakanya malunga ne-10 ukuya kwi-20% yeendleko ezipheleleyo zebhetri ye-lithium ion. Kwinqanaba le-electrode engalunganga, kubandakanywa nenkqubo ye-carbon, i-electrode engekho-carbon-based negative.

Ulwelo lwe-electrolyte lusebenza ekuthuthweni kwentlawulo phakathi kwe-electrode elungileyo kunye ne-electrode engalunganga (efana nomthwali kunomathotholo), inomgangatho ophezulu we-ionic conductivity, ngokubanzi kufuneka ifikelele kwi-1x10-3 ~ 2x10-2s / cm. Ichaphazela ubuninzi bamandla, ukusetyenziswa kweqondo lokushisa elibanzi, ubomi bomjikelezo, ubuninzi bamandla, ukusebenza kokhuseleko kunye nezinye izinto ze-lithium-ion battery packs. I-diaphragm diaphragm inomlinganiselo othile wepore kunye ne-porosity, iqinisekisa ukuxhathisa okuphantsi kunye ne-ion conductivity ephezulu, inokungena kakuhle kwi-lithium ion, ukungena kakuhle kwe-electrolyte kwaye inamandla okwaneleyo okuthambisa, kunye nokubamba i-ion.

I-Conductivity, ngelixa i-electron insulation, iqinisekisa ukuhlukaniswa komatshini kwezibonda ezilungileyo kunye nezibi, ngaphezu koko, kufuneka kubekho amandla okwaneleyo okubhoboza, iipropathi zomatshini ezifana nokuqina kokuqina kunye nokumelana nokubola kunye nokuzinza okwaneleyo kwe-electrochemical. Ibhetri ye-lithium enamandla ineemfuno eziphezulu ze-diaphragm, edla ngokusetyenziswa kwifilimu edibeneyo. Ibhetri ye-Lithium ion Umgaqo osebenzayo: Ibhetri ye-ion ye-lithium ibhetri etshajwayo, ebalulekileyo ukuthembela kwi-ejection embedding ejikelezayo kunye ne-deinterlating phakathi kwe-ion ze-lithium phakathi kwe-electrode efanelekileyo kunye ne-electrode engafanelekanga ukuphumeza ukugcinwa kwamandla kunye nokukhululwa.

Kukho iziganeko ezimbini kwinkqubo yokuhlawula kunye nokukhutshwa: enye. Ukutshaja ngokugqithiseleyo okubangelwa ukugqithiswa kwe-lithium kunokubangela ukuba zonke ii-athomu ze-lithium kwizinto eziphathekayo ze-electrode kwizinto ezimbi ze-electrode, okukhokelela ekutshintsheni kwegridi edibeneyo, ekwasisizathu esibalulekileyo sokuhla kwebhetri ye-lithium-ion. Ngethuba le nkqubo, i-lithium ion ye-electrode engathandekiyo iyanda, kwaye ukuqokelela ngokugqithiseleyo kuvumela i-athomu ye-lithium ukuba ibe yikristale, ukwenzela ukuba ibhetri iqhube.

Mbini. Kwintlawulo yokuqala kunye nenkqubo yokukhupha ibhetri ye-lithium ion, i-electrode material isabela kwi-slid-liquid phase interface kwi-lithium ion ibhetri ye-lithium, eyenza i-passivation layer egubungela umphezulu wezinto ze-electrode. Ifilimu eyenziweyo yomaleko we-passivation inokuthintela ngokufanelekileyo ukuhamba kwe-molecule ye-electrolyte, kodwa i-Li + inokufakwa ngokukhululekileyo kwaye ikhutshwe ngumaleko we-passivation, kwaye ineempawu ze-electrolyte eqinile, ngoko olu luhlu lwefilimu ye-passivation lubizwa ngokuba luqilima. I-electrolyte interface mask.

(SolideElectrolyteinterface), ekubhekiselwa kuyo njenge-SEI. Ifilimu ye-SEI iya kukhusela izinto ezingalunganga ze-electrode, ukwenzela ukuba isakhiwo sezinto eziphathekayo singabi lula ukuwa, kwaye ubomi bomjikelezo wezinto ze-electrode zinokongezwa. Ifilimu ye-SEI ayikho rhoqo, kuya kubakho utshintsho oluncinci ngexesha lokuhlawula kunye nenkqubo yokukhupha, kubalulekile ukuba enye into ephilayo iya kuguqulwa.

Emva kokuba ibhetri ikhutshwe ngokugqithiseleyo, ifilimu ye-SEI iyenzeka ukubuyisela umva ukuphula i-ring, kunye nokutshatyalaliswa kwe-SEI yezinto ezimbi ze-electrode kwenza ukuba izinto ezingalunganga ze-electrode ziwa, ngaloo ndlela zenze into eninzi.

QHAGAMSHELANA NATHI
Sixelele nje iimfuno zakho, singenza okungaphezulu koko unokucinga.
Thumela ingxelo yakho
Chat with Us

Thumela ingxelo yakho

Khetha ulwimi olwahlukileyo
English
العربية
Deutsch
Español
français
italiano
日本語
한국어
Português
русский
简体中文
繁體中文
Afrikaans
አማርኛ
Azərbaycan
Беларуская
български
বাংলা
Bosanski
Català
Sugbuanon
Corsu
čeština
Cymraeg
dansk
Ελληνικά
Esperanto
Eesti
Euskara
فارسی
Suomi
Frysk
Gaeilgenah
Gàidhlig
Galego
ગુજરાતી
Hausa
Ōlelo Hawaiʻi
हिन्दी
Hmong
Hrvatski
Kreyòl ayisyen
Magyar
հայերեն
bahasa Indonesia
Igbo
Íslenska
עִברִית
Basa Jawa
ქართველი
Қазақ Тілі
ខ្មែរ
ಕನ್ನಡ
Kurdî (Kurmancî)
Кыргызча
Latin
Lëtzebuergesch
ລາວ
lietuvių
latviešu valoda‎
Malagasy
Maori
Македонски
മലയാളം
Монгол
मराठी
Bahasa Melayu
Maltese
ဗမာ
नेपाली
Nederlands
norsk
Chicheŵa
ਪੰਜਾਬੀ
Polski
پښتو
Română
سنڌي
සිංහල
Slovenčina
Slovenščina
Faasamoa
Shona
Af Soomaali
Shqip
Српски
Sesotho
Sundanese
svenska
Kiswahili
தமிழ்
తెలుగు
Точики
ภาษาไทย
Pilipino
Türkçe
Українська
اردو
O'zbek
Tiếng Việt
Xhosa
יידיש
èdè Yorùbá
Zulu
Ulwimi lwangoku:Xhosa