Kuongorora iyo lithium plating phenomenon mumabhatiri e lithium: kiyi yekuchengetedza bhatiri kuchengetedza uye kuita.

Hei, shamwari! Unoziva here kuti musimboti wesimba sosi chii mumidziyo yemagetsi yatisingakwanise kurarama tisina mazuva ese, senge mbozhanhare nemalaptop? Ndizvozvo, iri lithium mabhatiri. Asi iwe unonzwisisa chimwe chinonetsa chiitiko mumabhatiri e lithium - lithium plating? Nhasi, ngationgororei zvakadzama nezve lithium plating phenomenon mumabhatiri e lithium, tinzwisise zvazvinoreva zvese, zvinokonzeresa sei, uye kuti tingaite sei nazvo.

I. Chii chinonzi lithium plating mumabhatiri e lithium?

Lithium plating mumabhatiri e lithium yakafanana ne "tsaona diki" munyika yebhatiri. Zvichitaurwa zviri nyore, pasi pemamiriro ezvinhu chaiwo, lithium ions mubhatiri inofanira kugadzikana zvakanaka pamagetsi asina kunaka, asi panzvimbo pezvo, inonaya zvisizvo pamusoro peiyo negative electrode uye inoshanduka kuita metallic lithium, kungofanana nekukura matavi madiki. Isu tinodaidza iyi lithium dendrite. Chiitiko ichi chinowanzoitika munzvimbo dzepasi-tembiricha kana bhatiri rinodzokororwa kuchaja uye kuburitswa. Nokuti panguva ino, iyo lithium ions inobuda kubva kune electrode yakanaka haigoni kuiswa mumagetsi asina kunaka uye inogona "kumisa musasa" pamusoro pe electrode yakaipa.

II. Sei lithium plating ichiitika?

Iyo lithium plating phenomenon hairatidzike pasina chikonzero. Zvinokonzerwa nezvinhu zvakawanda zvinoshanda pamwechete.

Chokutanga, kana "imba duku" ye electrode yakaipa isina kukura zvakakwana, kureva kuti, simba re electrode risina kukwana harina kukwana kugadzirisa zvose lithium ions dzinomhanya kubva kune electrode yakanaka, ipapo iyo yakawandisa lithium ions inogona kungodonha pamusoro pemvura. iyo negative electrode.

Chechipiri, chenjerera paunenge uchichaja! Kana uchichaja pane tembiricha yakaderera, iine ikozvino hombe, kana kuti yakawandisa, zvakafanana nekuve nevaenzi vakawandisa vachiuya ku "small house" yeelectrode yakaipa zvese kamwechete. Haikwanise kuibata, uye iyo lithium ions haigone kuiswa munguva, saka iyo lithium plating phenomenon inoitika.

Zvakare, kana chimiro chemukati chebhatiri chisina kugadzirwa zvine musoro, sekunge kune wrinkles muparadzanisa kana bhatiri sero rakaremara, zvinokanganisa nzira yekumba yelithium ion uye kuita kuti vasakwanise kuwana nzira kwayo, inogona kutungamira nyore kune lithium plating.

Mukuwedzera, iyo electrolyte yakafanana ne "diki gwara" re lithium ions. Kana huwandu hwe electrolyte husina kukwana kana mahwendefa e electrode asina kunyatsopinzwa, iyo lithium ion inorasika, uye lithium plating ichatevera.

Pakupedzisira, iyo SEI firimu pamusoro peiyo yakaipa electrode yakakoshawo! Kana ikanyanya kukora kana kukuvadzwa, iyo lithium ion haigone kupinda muiyo yakaipa electrode, uye iyo lithium plating phenomenon ichaonekwa.

III. Tingagadzirisa sei lithium plating?

Usanetseke, isu tine nzira dzekubata ne lithium plating.

Isu tinokwanisa kukwenenzvera chimiro chebhatiri. Semuenzaniso, gadzira bhatiri zvine musoro, kuderedza nzvimbo inonzi Overhang, shandisa multi-tab dhizaini, uye gadzirisa chiyero cheN / P kubvumira lithium ions kuyerera zvakanyanya.

Kudzora mabhatiri ekuchaja uye kuburitsa mamiriro kwakakosha zvakare. Zvakafanana nekuronga "mitemo yemigwagwa" yakakodzera ye lithium ions. Dzora kubhadharisa uye kuburitsa voltage, ikozvino, uye tembiricha kuitira kuti lithium plating reaction isanyanya kuitika.

Kuvandudza kuumbwa kwe electrolyte zvakare kwakanaka. Tinogona kuwedzera lithium munyu, additives, kana co-solvents kuita kuti electrolyte ive nani. Haikwanise kungodzivirira kuparara kwe electrolyte asiwo kudzivirira iyo lithium plating reaction.

Isu tinogona zvakare kugadzirisa iyo negative electrode zvinhu. Zvakafanana nekuisa "chipfeko chekudzivirira" pane electrode yakaipa. Kuburikidza nenzira dzakadai seyepamusoro pekuvhara, doping, kana alloying, tinogona kuvandudza kugadzikana uye anti-lithium plating kugona kweiyo yakaipa electrode.

Ehe, iyo bhatiri manejimendi system yakakoshawo. Zvakafanana ne "butter" rakangwara rinotarisa uye nehungwaru kutonga kubhadharisa uye kuburitsa maitiro munguva chaiyo kuona kuti bhatiri rinoshanda pasi pemamiriro akachengeteka, kudzivirira kuwandisa uye kuburitsa, uye kuderedza njodzi ye lithium plating.

IV. Ndeapi maitiro ane lithium plating pamabhatiri?

Lithium plating hachisi chinhu chakanaka! Ichaita kuti lithium dendrites ikure mukati mebhatiri. Aya ma lithium dendrites akafanana nevadiki vanonetsa. Vanogona kupinda muparadzi uye kukonzera mukati mapfupi dunhu, izvo zvine njodzi. Zvichida zvichatokonzera kutiza kwemhepo uye njodzi dzekuchengeteka. Zvakare, panguva yelithium plating process, huwandu hwelithium ion hunodzikira, uye huwandu hwebhatiri huchadzikirawo, hupfupisa hupenyu hwesevhisi yebhatiri.

V. Ndeupi hukama pakati penzvimbo dzepasi-tembiricha uye lithium plating?

Munzvimbo dzakaderera-tembiricha, iyo electrolyte inonamira. Lithium kunaya paiyo yakaipa electrode ichave yakanyanya kuomarara, iyo yekuchaja yekufambisa impedance ichawedzera, uye mamiriro ekinetic achawedzerawo. Zvinhu izvi zvakabatanidzwa zvakafanana nekuwedzera mafuta kune lithiamu plating phenomenon, zvichiita kuti mabhatiri e lithium awedzere kune lithium plating munzvimbo dzakadzika-tembiricha uye kukanganisa kushanda kwekukurumidza uye hutano hwenguva refu hwebhatiri.

VI. Iyo bhatiri manejimendi system inogona sei kuderedza lithium plating?

Iyo bhatiri manejimendi system ine simba kwazvo! Iyo inogona kutarisa bhatiri paramita munguva chaiyo, kungofanana nemeso akajeka, inogara ichitarisa mamiriro ebhatiri. Wobva wagadzirisa nzira yekuchaja zvinoenderana nedata kuita kuti lithium ions iteerere.

Inogona zvakare kuona shanduko dzisina kujairika mubhatiri yekuchaja curve. Semutikitivha akangwara, inogona kufanotaura chiitiko che lithium plating pachine uye nekuchidzivirira.

Thermal management yakakoshawo! Iyo bhatiri manejimendi system inogona kupisa kana kutonhodza bhatiri kudzora tembiricha yekushanda uye kubvumira lithium ions kufamba patembiricha yakakodzera kuderedza njodzi ye lithium plating.

Kuchajisa zvine mwero kunokoshawo. Inogona kuve nechokwadi chekuti bhatiri rimwe nerimwe mubhatiri pack rinochajwa zvakaenzana, sekubvumidza yega lithium ion kuwana yayo "kamuri diki".

Uyezve, kuburikidza nekufambira mberi kwesainzi yemidziyo, tinogona zvakare kukwidziridza iyo yakaipa electrode zvinhu uye dhizaini yebhatiri kuita kuti bhatiri risimbe.

Chekupedzisira, kugadzirisa chiyero chekuchaja uye kugovera kwazvino kwakakosha zvakare. Dzivisa kuwandisa kwenzvimbo yazvino uye isa inonzwisisika yekuchaja yekucheka-kubvisa voltage kuti ubvumire lithium ion kuti iiswe zvakachengetedzeka mugerodhi isina kunaka.

Mukupedzisa, kunyange zvazvo lithium plating phenomenon mumabhatiri e-lithium iri kunetsa zvishoma, chero bedzi isu tichinyatsonzwisisa zvikonzero zvayo uye kutora matanho anobudirira ekudzivirira nekudzivirira, tinogona kuita kuti mabhatiri e lithium akachengeteka, ave nekushanda zviri nani, uye ave nehupenyu hurefu hwebasa. Ngatishandei pamwechete kuchengetedza mabhatiri edu e-lithium!