Isinyathelo sokugqibela kwimveliso yebhetri ye-lithium kukulinganisa kunye nokukhangela ibhetri ye-lithium ukuqinisekisa ukuhambelana kwemodyuli yebhetri kunye nokusebenza kakuhle kwemodyuli yebhetri. Njengoko kwaziwa kubo bonke, iimodyuli ezenziwe ngeebhetri ezinokuhambelana okuphezulu zinobomi obude benkonzo, ngelixa iimodyuli ezinokungahambi kakuhle zixhomekeke ekuhlawuleni ngokugqithiseleyo kunye nokukhutshwa ngokugqithiseleyo ngenxa yempembelelo yebhakethi, kunye nokunciphisa ubomi bebhetri yabo ngokukhawuleza. Umzekelo, amandla ohlukeneyo ebhetri anokubangela ukukhupha ubunzulu obuhlukeneyo bomtya ngamnye webhetri. Iibhetri ezinomthamo omncinci kunye nokusebenza kakubi kuya kufikelela kwisimo esipheleleyo sentlawulo kwangaphambili. Ngenxa yoko, iibhetri ezinomthamo omkhulu kunye nokusebenza kakuhle azikwazi ukufikelela kwixabiso elipheleleyo. Amandla ombane ebhetri angangqinelaniyo abangela ukuba ibhetri nganye ekwintambo enxuseneyo itshajelane. Ibhetri ene-voltage ephezulu ihlawulisa ibhetri ngombane osezantsi, okhawulezisa ukuthotywa kokusebenza kwebhetri kwaye isebenzise amandla omtya webhetri yonke. Ibhetri enezinga eliphezulu lokuzikhupha linokulahleka okukhulu kwamandla. Amazinga angahambelaniyo okuzikhupha abangela ukungafani kwimeko ehlawuliswayo kunye ne-voltage yeebhetri, ezichaphazela ukusebenza kweentambo zebhetri. Kwaye ke lo mahluko webhetri, ukusetyenziswa kwexesha elide kuya kuchaphazela ubomi bemodyuli yonke.

Umfanekiso

IKHIWANE. I-1.OCV- i-voltage yokusebenza – idayagram yombane we-polarization

Ukuhlelwa kwebhetri kunye nokuhlolwa kukuphepha ukukhutshwa kweebhetri ezingahambelaniyo ngexesha elifanayo. Ukuchasana kwangaphakathi kwebhetri kunye novavanyo lokuzikhupha luyimfuneko. Ngokuqhelekileyo, ukuchasana kwangaphakathi kwebhetri kwahlulwe kwi-ohm ukuchasana kwangaphakathi kunye ne-polarization yangaphakathi. I-Ohm ukuchasana kwangaphakathi kuqulethe izinto ze-electrode, i-electrolyte, ukuchasana kwe-diaphragm kunye nokuxhatshazwa koqhagamshelwano lwecandelo ngalinye, kubandakanywa i-impedance ye-elektroniki, i-ionic impedance kunye ne-impedance yoqhagamshelwano. Ukuchasana kwe-polarization yangaphakathi kubhekiselele ekuchaseni okubangelwa yi-polarization ngexesha lokuphendula kwe-electrochemical, kubandakanywa ne-electrochemical polarization ukumelana kwangaphakathi kunye nokugxilwa kwe-polarization yangaphakathi. Ukuxhatshazwa kwe-ohmic yebhetri kuchongwa yi-conductivity epheleleyo yebhetri, kwaye ukuchasana kwe-polarization kwebhetri kuchongwa yi-coefficient yesigaba esiqinileyo se-lithium ion kwizinto ezisebenzayo ze-electrode. Ngokuqhelekileyo, ukuchasana kwangaphakathi kweebhetri ze-lithium akunakwahlulwa kuyilo lwenkqubo, izinto ngokwazo, indawo engqongileyo kunye nezinye iinkalo, eziza kuhlalutywa kwaye zichazwe ngezantsi.

Okokuqala, uyilo lwenkqubo

(1) Ukuqulunqwa kwe-electrode efanelekileyo kunye nengalunganga kunomxholo ophantsi we-ejenti eqhubayo, okubangela ukuba kubekho impedance enkulu yokuhanjiswa kwe-elektroniki phakathi kwezinto kunye nomqokeleli, oko kukuthi, i-impedance ephezulu ye-elektroniki. Iibhetri zeLithium zifudumeza ngokukhawuleza. Nangona kunjalo, oku kuchongwa ngokuyila ibhetri, umzekelo, ibhetri yamandla ukuba ithathele ingqalelo ukusebenza kwezinga, idinga umlinganiselo ophezulu we-agent eqhubayo, efanelekileyo kwintlawulo enkulu kunye nokukhutshwa. Ibhetri yomthamo ngumthamo othe chatha, ubungakanani bezinto ezilungileyo kunye nezingalunganga ziya kuba phezulu kancinci. Ezi zigqibo zenziwa ekuqaleni koyilo lwebhetri kwaye azinakuguqulwa lula.

(2) kukho i-binder eninzi kakhulu kwifomula ye-electrode efanelekileyo kunye nengalunganga. Isibophelelo ngokuqhelekileyo sisixhobo sepolymer (PVDF, SBR, CMC, njl.) kunye nokusebenza okuqinileyo kokugquma. Nangona umlinganiselo ophezulu we-binder kumlinganiselo wokuqala uluncedo ekuphuculeni amandla okuhluthwa kweepali, akubikho ukuchasana kwangaphakathi. Kuyilo lwebhetri ukulungelelanisa ubudlelwane phakathi kwe-binder kunye ne-binder dosage, eya kugxila ekusasazweni kwe-binder, oko kukuthi, inkqubo yokulungiswa kwe-slurry, kangangoko kunokwenzeka ukuqinisekisa ukusasazwa kwe-binder.

(3) Izithako azihlakazwanga ngokulinganayo, i-agent ye-conductive ayichithwanga ngokupheleleyo, kwaye isakhiwo sothungelwano esilungileyo asikwenziwanga. Njengoko kubonisiwe kwi-Figure 2, i-A yimeko yokusasazwa kakubi kwe-agent eqhubayo, kwaye i-B yimeko yokusasazwa kakuhle. Xa isixa se-agent conductive siyafana, utshintsho lwenkqubo yokuvuselela luya kuchaphazela ukusabalalisa kwe-agent edibeneyo kunye nokuchasana kwangaphakathi kwebhetri.

Umzobo 2. Ukusasazwa okulambathayo kwe-arhente eqhubayo (A) Ukusasazwa okulinganayo kwe-arhente yokuqhuba (B)

(4) I-binder ayinyibiliki ngokupheleleyo, kwaye kukho amasuntswana e-micelle, okukhokelela ekuchaseni okuphezulu kwangaphakathi kwebhetri. Kungakhathaliseki ukuba ukuxuba okomileyo, ukuxutywa kwe-semi-dry okanye inkqubo yokuxuba okumanzi, kuyafuneka ukuba i-powder binder ichithwe ngokupheleleyo. Asikwazi ukulandela ukusebenza kakuhle kakhulu kwaye singayihoyi imfuno yenjongo yokuba isibophelelo sidinga ixesha elithile ukuze sichithwa ngokupheleleyo.

(5) I-electrode compaction density iya kuchaphazela ukuchasana kwangaphakathi kwebhetri. Ubuninzi be-compact yeplate ye-electrode buncinci, kwaye i-porosity phakathi kweengqungquthela ngaphakathi kwepleyiti ye-electrode iphezulu, engafanelekanga ukuhanjiswa kwee-electron, kwaye ukuchasana kwangaphakathi kwebhetri kuphezulu. Xa ishidi le-electrode lidityaniswe kakhulu, i-electrode powder particles inokuthi igqitywe, kwaye indlela yokuhanjiswa kwe-electron iba yinde emva kokutyumza, okungekho kulungelelaniso kunye nokukhupha ukusebenza kwebhetri. Kubalulekile ukukhetha ukuxinana okuchanekileyo.

(6) I-welding embi phakathi kwe-electrode lug efanelekileyo kunye ne-negative kunye nomqokeleli we-fluid, i-welding ebonakalayo, ukuxhathisa ibhetri ephezulu. Iiparamitha ezifanelekileyo ze-welding kufuneka zikhethwe ngexesha le-welding, kunye ne-welding parameters ezifana namandla welding, amplitude kunye nexesha kufuneka liphuculwe nge-DOE, kwaye umgangatho we-welding kufuneka ugwetywe ngamandla welding kunye nokubonakala.

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(8) I-electrolyte yebhetri ayingenwanga ngokupheleleyo kwii-electrode ezilungileyo kunye ne-negative kunye ne-diaphragm, kwaye isibonelelo soyilo lwe-electrolyte ayanelanga, nto leyo eya kukhokelela kwi-ionic impedance enkulu yebhetri.

(9) Inkqubo yokwakheka ihlwempuzekileyo, i-graphite anode surface SEI ayizinzile, ichaphazela ukuchasana kwangaphakathi kwebhetri.

(10) Abanye, njengokupakishwa okungalunganga, i-welding engafanelekanga yeendlebe ze-pole, ukuvuza kwebhetri kunye nomxholo ophezulu womswakama, kunempembelelo enkulu ekuchaseni kwangaphakathi kweebhetri ze-lithium.

Okwesibini, izixhobo

(1) Ukuchasana kwe-anode kunye ne-anode kukhulu.

(2) Impembelelo ye-diaphragm material. Njengobunzima be-diaphragm, ubungakanani be-porosity, ubungakanani bepore njalo njalo. Ukutyeba kuhambelana nokuchasana kwangaphakathi, ukunyanzeliswa kwangaphakathi kuncinci, ukuze kufezekiswe intlawulo yamandla aphezulu kunye nokukhutshwa. Incinci kangangoko phantsi kwamandla athile omatshini, okukhona amandla okugqobhoza angcono. Ubungakanani bepore kunye nobukhulu bepore be-diaphragm bunxulumene nokuphazamiseka kokuthuthwa kwe-ion. Ukuba ubungakanani bepore buncinci kakhulu, buya kwandisa i-ion impedance. Ukuba ubungakanani bepore bukhulu kakhulu, bungenakukwazi ukuhlukanisa ngokupheleleyo umgubo ococekileyo kunye nombi, oya kukhokelela ngokulula kwisiphaluka esifutshane okanye ukuhlatywa yi-lithium dendrite.

(3) Impembelelo yezinto ze-electrolyte. I-ionic conductivity kunye ne-viscosity ye-electrolyte inxulumene ne-ionic impedance. Okukhona i-ionic transfer impedance, kokukhona ukuxhathisa okukhulu kwangaphakathi kwebhetri, kwaye kokukhona kubi kakhulu i-polarization kwinkqubo yokutshaja kunye nokukhupha.

(4) Impembelelo yezinto eziphathekayo zePVDF. Umlinganiselo ophezulu wePVDF okanye ubunzima obuphezulu be-molecular uya kukhokelela ekuchaseni okuphezulu kwangaphakathi kwebhetri ye-lithium.

(5) Impembelelo yezinto ezilungileyo zokuqhuba. Ukukhethwa kohlobo lwe-agent ye-conductive nayo ingundoqo, njenge-SP, i-KS, i-graphite eqhubayo, i-CNT, i-graphene, njl., ngenxa ye-morphology eyahlukileyo, ukusebenza kwe-conductivity yebhetri ye-lithium yahluke kakhulu, kubaluleke kakhulu ukukhetha. i-agent eqhubayo ene-conductivity ephezulu kwaye ilungele ukusetyenziswa.

(6) impembelelo yezinto ezintle kunye ezimbi ze-pole ear. Ubunzima bendlebe yesibonda buncinci, i-conductivity ihlwempuzekile, ukucoceka kwezinto ezisetyenzisiweyo akuphezulu, i-conductivity iyancipha, kwaye ukuchasana kwangaphakathi kwebhetri kuphezulu.

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Umfanekiso

Eminye imiba

(1) Ukutenxa isixhobo sovavanyo lwangaphakathi. Isixhobo kufuneka sihlolwe rhoqo ukuze kuthintelwe iziphumo zovavanyo ezingachanekanga ezibangelwa sisixhobo esingachanekanga.

(2) Ukuchasana kwebhetri okungaqhelekanga okubangelwa kukusebenza okungafanelekanga.

(3) Imekobume yemveliso engalunganga, njengokulawula uthuli kunye nokufuma. Uthuli lweworkshop lugqithisa umgangatho, luya kukhokelela ekwandeni kokuchasana kwangaphakathi kwebhetri, ukuzikhupha ngokwazo kuyingozi. Ukufuma kweworkshop kuphezulu, kuya kuba yingozi ekusebenzeni kwebhetri ye-lithium.