Ƙarfin batirin lithium-ion na hunturu zai zama rashin jin daɗi, me yasa batirin lithium ion "tsora" ƙananan zafin jiki yake?

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Προμηθευτής φορητών σταθμών παραγωγής ενέργειας

Tun lokacin da aka shiga kasuwa, batir lithium-ion sun sami nau&39;ikan aikace-aikace masu yawa tare da fa&39;idodin rayuwa mai tsayi, ƙayyadaddun iya aiki, babu tasirin ƙwaƙwalwar ajiya. Ƙananan zafin baturi na lithium-ion yana da ƙasa, raguwa mai tsanani, rashin aikin haɓakar sake zagayowar, bayyanannen yanayin lithium, rashin daidaituwa na lithium, da dai sauransu. Koyaya, tare da ci gaba da faɗaɗa aikace-aikacen, ƙuntatawar ƙarancin zafin aikin batirin lithium-ion ya fi bayyane.

A cewar rahotanni, ƙarfin fitarwa na baturin lithium-ion kusan 31.5% ne kawai a cikin zafin jiki a -20 ° C. Batirin lithium-ion na gargajiya yana aiki da zafin jiki tsakanin -20 - + 55 ° C.

Amma a fagen sararin samaniya, motocin lantarki, da sauransu, baturin zai iya aiki yadda ya kamata a -40 ° C. Sabili da haka, yana da mahimmanci don inganta ƙarancin zafin jiki na batirin lithium ion.

Abubuwan da suka takura batir lithium-ion ƙananan zafin aiki ● A cikin ƙananan yanayin zafi, dankowar electrolyte yana ƙaruwa, ko da wani ɓangare yana ƙarfafawa, yana haifar da ƙarancin ƙarfin lantarki na baturin lithium ion. ● Daidaituwa tsakanin electrolyte da mummunan lantarki da diaphragm yana lalacewa a ƙarƙashin ƙananan yanayin zafi. ● Rashin wutar lantarki na baturin lithium-ion a ƙarƙashin ƙananan yanayin zafi yana haɗe sosai, kuma ana ɗaukar nauyin lithium ɗin ƙarfe da aka haɗe tare da electrolyte, kuma jigon samfurin yana haifar da ƙaƙƙarfan ƙaƙƙarfan yanayin yanayin lantarki (SEI).

● An saukar da baturin lithium ion a ƙarƙashin ƙananan yanayin zafi, kuma ƙarfin canja wurin caji (RCT) yana ƙaruwa sosai. Tattaunawa game da abubuwan da ke haifar da ƙananan zafin jiki da ke shafar baturan lithium ion ● Mahimman hangen nesa 1: Maganin Electrolyne yana da tasiri mai mahimmanci akan ƙananan zafin jiki na batirin lithium ion, abun da ke ciki da kayan kayan aiki na electrolyte yana da tasiri mai mahimmanci akan baturi mai ƙananan zafin jiki. Matsalolin da ke cikin ƙananan zafin baturi shine: dankowar electrolyte zai zama babba, saurin tafiyar da ion yana jinkirin, yana haifar da gudun hijirar electron na kewayen waje, don haka baturin ya zama polarized sosai, kuma caji da fitarwa yana da raguwa sosai.

Musamman lokacin caji mara ƙarancin zafi, lithium ions na iya ƙirƙirar lithium delegranes cikin sauƙi a saman ƙarancin lantarki, wanda ke haifar da gazawar baturi. Ƙarƙashin yanayin zafi na electrolyte yana da alaƙa da girman girman kansa na lantarki, watsawar ion na lantarki yana da sauri, kuma ana iya yin ƙarin iya aiki a ƙananan yanayin zafi. Yawancin gishirin lithium a cikin electrolyte, yawan adadin ƙaura, mafi girma da haɓakawa.

Babban ƙarfin wutar lantarki, mafi saurin ion conductivity, ƙarami polarization, mafi kyawun aikin baturi a ƙananan zafin jiki. Sabili da haka, haɓaka aiki mafi girma shine yanayin da ya zama dole don samun kyakkyawan aikin ƙarancin zafin jiki na batir lithium ion. Ƙwararren wutar lantarki na lantarki yana da alaƙa da abun da ke cikin electrolyte, kuma danko na sauran ƙarfi shine inganta hanyar lantarki.

Ruwan daɗaɗɗen kaushi yana da kyau a ƙananan zafin jiki na kaushi shine garantin jigilar ion, kuma ƙaƙƙarfan membrane na electrolyte da aka kafa ta hanyar electrolyte a cikin ƙananan zafin jiki na electrolyte shi ma maɓalli ne ga jagorancin lithium ion conduction, kuma RSEI shine babban abin ƙyama na baturin lithium ion a cikin ƙananan yanayin zafi. ● Ra&39;ayi na ƙwararru 2: Ƙarfin batirin lithium-ion ƙarancin zafin aiki shine haɓakar haɓakar haɓakar LI + a ƙarƙashin ƙarancin zafin jiki, amma ba fim ɗin SEI ba. Halayen ƙananan zafin jiki na ingantaccen kayan lantarki na batirin lithium ion baturi ● 1, ƙananan yanayin yanayin yanayin yanayin Layer na tsarin mai laushi mai kyau kayan lantarki yana da tashar watsawar lithium ion mai girma guda ɗaya, kuma yana da kwanciyar hankali na tsarin tashar tashar mai girma uku, wanda shine farkon kasuwanci na kasuwanci.

Lithium ion baturi tabbatacce abu. Abubuwan wakilcinsa sun haɗa da LiCoO2, Li (CO1-XNIX) O2 da Li (Ni, Co, Mn) O2, da sauransu. Xie Xiaohua, da dai sauransu.

Yi amfani da LiCoo2 / MCMB azaman abubuwan bincike, gwada ƙarancin cajin yanayin zafi. Sakamakon ya nuna cewa yayin da zafin jiki ya ragu, dandamalin fitarwa yana raguwa daga 3.762V (0 ° C) zuwa 3.

207V (-30 ° C); Jimlar ƙarfin batirinsa kuma an rage shi daga 78.98mA · h (0 ° C) zuwa 68.55mA · h (-30 ° C).

● 2, da ƙananan zafin jiki halayyar ingancin abu na kashin baya tsarin spinel tsarin LiMn2O4 tabbatacce abu, saboda babu wani Co element, akwai wani low cost, mara guba abũbuwan amfãni. Koyaya, kayan aikin Mn valence da tasirin JaHN-Teller na Mn3 +, yana haifar da matsaloli kamar rashin daidaituwar tsari da bambance-bambance masu iya juyawa. Peng Zhenghun, yana nuna cewa aikin lantarki na LiMn2O4 tabbataccen kayan lantarki yana da girma, kuma ana amfani da RCT a matsayin misali: RCT na LIMN2O4 da aka haɗa ta hanyar ingantaccen yanayin zafin jiki yana da girma fiye da hanyar sol gel, kuma wannan lamari yana cikin ion lithium da aka dasa akan coefficients masu yaduwa.

Dalilin shine yafi saboda hanyoyi daban-daban na roba don crystallinity da ilimin halittar jiki na samfur. ● 3, ƙananan yanayin zafin jiki na tsarin phosphate tabbatacce kayan lantarki LIFEPO4 shine babban jikin batirin baturi mai kyau saboda kyakkyawan kwanciyar hankali da aminci, tare da kayan aiki na ternary. Rashin ƙarancin zafin jiki na baƙin ƙarfe phosphate shine yafi saboda kayan da kansa shine insulator, ƙarfin lantarki yana da ƙasa, yaduwar lithium ion ba shi da kyau, don haka juriya na ciki na baturi ya karu, polarization yana da girma, cajin baturi da fitarwa yana toshewa, don haka ƙananan zafin jiki ba shi da kyau.

Valley Yidi, da dai sauransu, lokacin nazarin halin caji da fitarwa na LifePO4 a ƙananan yanayin zafi, ƙimar Kulen shine 64% a 96% da -20 ° C a 55 ° C zuwa 0 ° C, kuma ƙarfin fitarwa yana daga 55 ° C 3.11V.

2.62V na isarwa zuwa -20 ° C. XING et al, ganowa, bayan haɓaka nanocarbon conductive jamiái, da electrochemical Properties na LiFePO4 rage, da kuma low zafin jiki yi da aka inganta; wutar lantarki fitarwa na LiFePO4 bayan gyara 3.

40 V ya fadi zuwa 3.09V a -25 ° C, raguwar kawai 9.12% ne; kuma ingancin batirinsa ya kai 57.

3%, sama da 53.4% ​​na wakilin lantarki mara nanocarbon a -25 ° C. Kwanan nan, LIMNPO4 ya jawo sha&39;awar mutane.

Binciken ya gano cewa LIMNPO4 yana da babban iko (4.1V), babu gurɓatacce, ƙarancin farashi, babban takamaiman iya aiki (170mAh / g), da sauransu. Koyaya, saboda ƙarancin ion conductivity na LIMNPO4 fiye da LiFePO4, galibi ana amfani dashi don maye gurbin Mn don samar da LiMn0.

8Fe0.2PO4 ingantaccen bayani a cikin ainihin amfani da sashin FE. A low zafin jiki halaye na korau electrode abu na lithium-ion baturi sun fi tsanani dangane da tabbatacce electrode abu, da kuma low zafin jiki tabarbarewar na lithium ion baturi ne mafi tsanani, yafi uku dalilai: ● Low zafin jiki high magnification cajin da fitarwa, baturi polarization ne mai tsanani, korau surface karfe Lithium ne sun fi mayar ajiya, da kuma dauki samfurin na karfe lithium da wutar lantarki gaba daya ba shi da electroly conductivity. Ya shafi ƙananan zafin jiki;.

Nazarin ƙananan zafin jiki na electrolytic mafita yana aiwatar da tasirin canja wurin Li + a cikin baturin lithium ion, da ƙarfinsa na ionic da aikin samar da fina-finai na SEI yana da tasiri mai mahimmanci akan aikin ƙananan zafin jiki. An ƙaddara cewa ƙananan zafin jiki na electrolytic bayani ne na musamman, akwai manyan alamomi guda uku: ionic conductivity, electrochemical windows, da electrode reactivity. Matsayin waɗannan alamomi guda uku sun dogara ne akan kayan haɗin kai: ƙarfi, electrolyte (gishirin lithium), ƙari.

Sabili da haka, nazarin ƙarancin zafin jiki na kowane ɓangare na electrolyte, yana da mahimmanci ga fahimta da inganta ƙarancin zafin baturi. ● EC-based electrolyte low zafin halaye idan aka kwatanta da sarkar carbonate, da cyclic carbonate tsarin ne kusa, da karfi, yana da babban narkewa batu da danko. Duk da haka, babban polarity na tsarin annular ya sa sau da yawa yana da babban dielectric akai-akai.

EC sauran ƙarfi yana da babban dielectric akai-akai, high ion conductivity, cikakken fim samuwar yi, yadda ya kamata ya hana sauran ƙarfi kwayoyin daga kasancewa co-saka, sabõda haka, yana da wani makawa matsayi, sabõda haka, mafi yawan low zafin jiki electrolytic bayani tsarin ne manyan, sa&39;an nan gauraye Low narkewa batu na kananan kwayoyin sauran ƙarfi. Gishirin lithium shine muhimmin abun da ke cikin electrolyte. Gishiri na lithium ba zai iya inganta haɓakar ionic kawai na maganin ba, har ma ya rage nisan yaduwa na Li + a cikin maganin.

Gabaɗaya, mafi girman maida hankali na Li + a cikin maganin, mafi girman haɓakar ion. Duk da haka, maida hankali na lithium ion maida hankali a cikin electrolyte ba a haɗa shi da layi ba, amma layi ne na parabolic. Wannan shi ne saboda, ƙaddamar da ƙwayar lithium ion a cikin mai narkewa ya dogara ne akan rarrabuwar gishirin lithium a cikin ƙarfi da ƙarfin ƙungiyar.

Nazarin ƙananan zafin jiki na electrolyte sai dai baturin ya ƙunshi kanta, kuma abubuwan tsari a cikin ainihin aiki kuma za su yi tasiri sosai akan aikin baturi. ● (1) Tsari Tsari YAQUB et al, tasirin nauyin lantarki da kauri akan LINI0.6CO 0.

2 mn0.2O2 / graphite baturi low zafin jiki yi bayyana cewa karami da lantarki load ne karami, da kasa shafi Layer ne thinner Mafi ƙarancin zafin jiki yi. ● (2) Matsayin caji da fitarwa Petzl et al, tasirin yanayin cajin ƙananan zafin jiki akan yanayin sake zagayowar baturi ya gano cewa lokacin da zurfin zurfafawa zai iya haifar da hasara mai girma, kuma yana rage rayuwar jini.

(3) Wurin da ke sama, buɗaɗɗen buɗaɗɗen wutar lantarki, ƙarancin wutar lantarki, daɗaɗɗen wutar lantarki da maganin electrolytic, da makamantansu, waɗanda ke shafar ƙarancin zafin batirin lithium ion. Bugu da ƙari, tasirin lahani na kayan aiki da matakai akan ƙananan yanayin zafi na baturi ba za a iya watsi da su ba. Sabili da haka, don tabbatar da ƙarancin zafin jiki na baturin lithium-ion, wajibi ne a yi haka: ● (1) samar da fim din SEI na bakin ciki da mai yawa; ● (2) yana ba da garantin cewa Li + yana da babban adadin rarrabawa a cikin abu mai aiki; ● (3) ) Electrolyte yana da babban ƙarfin ion a cikin ƙananan yanayin zafi.

Bugu da kari, binciken kuma zai iya daukar wata hanya, kuma ido yana juya zuwa wani nau&39;in batirin lithium-ion - cikakken batirin lithium ion baturi. Idan aka kwatanta da na al&39;ada lithium-ion baturi, duk m-state lithium ion baturi, musamman cikakken m bakin ciki film lithium ion baturi, ana sa ran gaba daya warware iya aiki attenuation matsalar da sake zagayowar aminci al&39;amurran da suka shafi amfani da baturi low yanayin zafi. To yaya kuke bi da batir lithium a cikin hunturu? 1.

Kada kayi amfani da zafin baturin lithium a cikin yanayin ƙananan zafin jiki don tasirin baturin lithium, ƙananan zafin baturin lithium, ƙananan aikin baturin lithium, wanda kai tsaye yana haifar da raguwa mai yawa a cikin caji da fitarwa, wanda shine gaba ɗaya, aikin baturan lithium zafin jiki yana tsakanin -20 digiri -60 digiri. Lokacin da zafin jiki ya kasa 0 ° C, yi hankali kada ku yi caji a waje, za ku iya cajin shi, za mu iya ɗaukar baturi a cikin ɗakin (bayanin kula, ku nisanta daga flammable !!!), Lokacin da zafin jiki ya kasa -20 A ° C, baturi zai shiga cikin yanayin barci ta atomatik kuma ba za a iya amfani dashi akai-akai ba. Don haka mai amfani da arewa yana da sanyi musamman.

Babu yanayin caji na cikin gida. Don yin cikakken amfani da sauran baturin, nan da nan yi cajin rana bayan yin parking, don ƙara caji, da guje wa lithium. 2, haɓaka yanayin hunturu na rakiyar, lokacin da baturin ya yi ƙasa sosai, dole ne mu yi caji akan lokaci, haɓaka kyawawan halaye na rakiyar, tuna, kar a taɓa bin baturi na yau da kullun don komawa zuwa ƙarfin baturi na hunturu.

Ayyukan batirin lithium na lokacin sanyi yana raguwa, mai sauqi don haifar da ƙarin caji, sauƙaƙan rinjayar rayuwar baturi, da kuma haifar da haɗarin konewa. Sabili da haka, kula da caji a cikin yanayin da ba shi da zurfi a cikin hunturu. Musamman bukatar a nuna, kar a ajiye abin hawa na dogon lokaci, guje wa cajin da ya wuce kima.

3, Kada ku nisanci tunawa da kada ku yi caji na dogon lokaci, kada ku sanya shi dacewa, sanya abin hawa na dogon lokaci a cikin halin caji, kuma kuna iya. Lokacin da yanayin caji a cikin hunturu bai wuce 0 ° C ba, lokacin da ake caji, kar a bar nisa sosai, don hana gaggawa, kulawa akan lokaci. 4.

Lokacin caji, yi amfani da kasuwar caja ta musamman na baturin lithium mai cike da caja mara kyau, ta yin amfani da ƙananan caja, na iya haifar da lalacewar baturi, har ma da haifar da wuta. Kada ku sayi samfuran masu rahusa waɗanda ba su da garanti, kar a yi amfani da cajar baturin gubar-acid; idan caja naka ba zai iya amfani da shi ba, daina amfani da shi, kar ka yi asara. 5, kula da rayuwar batir, canjin lokaci akan sabon batirin lithium, rayuwar baturi daban-daban, da yadda ake amfani da shi yau da kullun, rayuwar batirin ba daidai bane, idan motar tana da ƙarfi ko gajeriyar hanya, tuntuɓi ma&39;aikatan kula da batirin lithium don kula da mai gyaran baturin lithium a cikin ɗan gajeren lokaci, tuntuɓi ma&39;aikatan kula da batirin lithium.

6, akwai wutar lantarki mai kyau don lokacin sanyi, don yin amfani da abin hawa a tsakiyar bazara, idan ba ku da tsayin baturi, za ku tuna cewa kuna cajin 50% - 80% na baturin, sannan ku cire shi daga motar, kuma kuyi caji akai-akai, kimanin wata ɗaya Caji. Lura: Ana adana baturin a busasshen wuri. 7.

Sanya baturin daidai Kada a nutsar da baturin cikin ruwa, ko sanya baturin ya zama m; kar a tara sama da benaye 7, ko juya alkiblar baturi, lithium.