Ibhetri yeLithium ubushushu obuphezulu buchaphazela, ubushushu obuphezulu bubangelwa yimibhobho yebhetri ye-lithium?

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Ibhetri ye-lithium-ion ifuthe lobushushu obuphezulu, ubushushu obuphezulu ngunobangela weegubhu zebhetri ze-lithium-ion? Ibhetri ye-lithium-ion ineenzuzo ze-voltage ephezulu yokusebenza, i-low-discipline, akukho mphumo yememori, akukho ngcoliseko, inethemba malunga ne-lithium iron phosphate ion ibhetri kwishishini elitsha lamandla, esetyenziswa ngokubanzi kwintsimi yamandla ebhetri ye-lithium kunye nokugcinwa kwamandla. Nangona kunjalo, isantya sokunyuswa kunye nesicelo sibanzi, kodwa ubunzulu abunelisi, izinto ezithintela ukunyuswa kwazo ngokukhawuleza Ukongeza kwixabiso le-batch consistency ebangelwa yimpahla yebhetri, ukusebenza kwayo kweqondo lokushisa yinto ebalulekileyo. Ibhetri ye-lithium-ion ifuthe eliphezulu lobushushu Kuyo yonke imiba yokusingqongileyo, iqondo lobushushu lichaphazela intlawulo kunye nokukhupha ukusebenza kwebhetri, ukusabela kwe-electrochemical kwi-electrode / electrolyte interface inxulumene nobushushu be-ambient, kunye nokunyuka kwamaqondo obushushu, i-lithium ion ibhetri yokuphuma kwamandla iya kunyuka.

Iqondo lokushisa lichaphazela isantya sothumelo lwe-electrolytic liquid, kwaye ukunyuka kweqondo lokushisa kuyakhawuleza, ubushushu bokudlulisa buyancipha, ukuhanjiswa kuhamba kancane, kwaye intlawulo yebhetri kunye nokusebenza kokukhutshwa kuya kuchaphazeleka. Nangona kunjalo, iqondo lokushisa liphezulu kakhulu ngaphezu kwe-45 ¡ã C ukutshabalalisa ibhalansi yeekhemikhali kwibhetri, okukhokelela ekuphenduleni kwecala. Umphumo weqondo lokushisa ekusebenzeni kokukhupha uphendula ngokuthe ngqo kumthamo wokukhupha kunye nokukhupha i-voltage.

Ubushushu buyancipha, ukuchasana kwangaphakathi kwanda, izinga lokuphendula kwe-electrochemical licotha, ukuchasana kwangaphakathi kwe-polarization kwanda, umthamo wokukhupha ibhetri kunye neqonga lokukhupha liyathotywa, lichaphazela ukuveliswa kwamandla ebhetri kunye namandla. Ukuhla kwebhetri ye-lithium-ion kunomphumo we-polarization yebhetri, oko kukuthi, i-lithium ion diffusion velocity ayikho kwisantya sokudlulisa i-electrons, ukwenzela ukuba i-ion ze-lithium ezihlaliswe yibhetri zincinci kwaye zincinci. Le nkqubo ye-polarization iqhubela phambili kwiqondo lokushisa eliphezulu le-60 ¡ã C, eyona nto ibangela ukuba i-lithium ion ibhetri ye-capacity attenuation.

Indlela yokungaphumeleli kobushushu obuphezulu beebhetri ze-lithium-ion inzima kakhulu kunangaphambili, kwaye kunzima ukuhlukanisa phakathi kokulahleka kwe-lithium esebenzayo kunye nokulahlekelwa kwezinto ezisebenzayo kuphando lwangempela. Kukho isigaba se-lithium ye-iron phosphate apho i-lithium phosphate impahla i-lithium phosphate ihlukaniswe kwi-channel conductive ye-electron eyenziwa yi-stress yangaphakathi, ukwenzela ukuba ukulahlekelwa kokukhumbula i-lithium akukwazi ukuguqulwa. Ubushushu obuphezulu bungunobangela weegubhu zebhetri ze-lithium-ion? 1 Ibonakaliswa njengembumbulu yeseli, ngoko ke ibhetri ziibhanti ikwasisilumkiso kwangethuba sokuba ibhetri yonakele okanye inokuba nemiba yokhuseleko.

I-2, ibhetri ichaphazeleka kubushushu obuphezulu, ixesha elininzi iiseli zigcinwa ixesha elide, kwaye iqondo lobushushu liya kukhawulezisa ukusabela kweekhemikhali kwiseli yebhetri ukwenza igesi, ngakumbi ukuba ibhetri igcwele okanye ihlawulwe kancinci. Imiphumo yokugcinwa kweqondo lokushisa eliphezulu kule nto ibonakala ngakumbi, ngoko kufuneka ikhuselwe ukuba igcinwe kwiqondo lokushisa eliphezulu. 3.

Ngethuba le nkqubo, i-lithium ion ye-electrode engathandekiyo iyanda, kwaye ukuqokelela ngokugqithiseleyo kuvumela i-athomu ye-lithium ukuba ibe yikristali, ukwenzela ukuba ibhetri iqhube. I-4, ifilimu ye-SEI iya kuthintela 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 ngokubuyisela umva ukuphula i-ring, kunye nokutshatyalaliswa kwe-SEI yezinto ezimbi ze-electrode kwenza ukuba izinto ezingalunganga ze-electrode ziwa, ngaloo ndlela zenze into eninzi. I-chemistry kunye ne-electrochemical reaction yeebhetri ze-lithium-ion kumaqondo aphezulu anzima kakhulu, ukufunda indlela esebenzayo phakathi kokubunjwa kwangaphakathi kwebhetri, kunye nokuphucula ukuvela kweentlobo ezahlukeneyo zokuphendula okugqithisileyo, ukuphucula ukusebenza kokhuseleko phantsi kokusetyenziswa kakubi kwebhetri kubalulekile. Iibhetri ze-lithium-ion zichaphazeleka ngubushushu, ngokwemiqathango yeendawo zokusebenza kwintsimi kunye nobushushu bebhetri ye-lithium yamandla, ukuphucula ukusebenza kwebhetri, ukwandisa ubomi benkonzo yebhetri.