Electric car is slowing down? Cambridge University gives a new treatment method

Umbhali :Iflowpower-UMboneleli weSikhululo saMandla esiphathwayo

Xa kuthelekiswa ne-mileage yobomi bebhetri, abantu banenkxalabo malunga nexesha lokuhlawula izithuthi zombane, nangona izithuthi ezininzi zombane eziqaliswe kwiminyaka yamuva zixhase i-30-40 min intlawulo ekhawulezayo (i-80% umthamo), kodwa ayikwazi ukuhlangabezana nokulindela kwabantu. Okwangoku, ibhetri ye-lithium ion yamandla esetyenziswa kwizithuthi zombane yibhetri ye-lithium ion, kwaye umda wokutshaja wesantya sebhetri ye-lithium ion ukwindibano engalunganga kwi-electrode engalunganga. Ngethuba lenkqubo yokutshaja, i-Li + ikhutshwe kwi-electrode efanelekileyo, i-solvent ixazululwe kwi-electrolyte, emva koko isasazwe kumphezulu we-electrode engalunganga, kunye nesakhiwo sekristal ye-electrode engalunganga yegraphite efakwe emva kwe-solvate.

Ngexesha lokusabela okupheleleyo, ukusasazwa kwe-solventization kunye ne-Li + kumasuntswana egraphite sisithintelo sekhonkco lesantya sokuphendula. Xa isantya sokutshaja sikhawuleza kakhulu, i-polarization yongezwa, kwaye i-metal Li iyancipha kumphezulu we-graphite negative electrode. Indlela eqhelekileyo yokuphucula i-electrode engafanelekanga i-nanofed, iphucula indawo yoqhagamshelwano yesixhobo esisebenzayo kunye ne-electrolyte, ukunciphisa umgama wokusasazwa phakathi kwe-Li + kwinto esebenzayo, kodwa oku kukwazisa uthotho lweengxaki, ezinje nge. I-nanoforming Ukuxinana kwe-compact kuyancipha, kunye nemiphumo emibi ebangelwa ubuninzi bendawo ethile.

Kentj.griffith (umbhali wokuqala) kunye noClarep.grey weYunivesithi yaseCambridge, eBritish Cambridge, baphule imida yokucinga kwendabuko, ukuqala kwisakhiwo sekristale, bafumanisa ukuba i-Ni kunye ne-W metal oxides isetyenziselwa ukwakha ezintathu ezifanelekileyo. -Isakhiwo sekristale esine-dimensional, inokuba kwii-microns Iimpawu eziphezulu zokukhulisa zifezekiswa kwinqanaba lobungakanani, kunye noxinzelelo oluphezulu lwe-high-pressure kunye neempawu eziphezulu zokukhulisa ngaxeshanye.

Kuvavanyo, i-Kentj.griffith isebenzisa i-NB kunye ne-W's oxide ukuze idibanise i-NB16W555 (njengoko kubonisiwe kwi-Fig. AC) kunye ne-Nb18W16O93 (njengoko kuboniswe kuMfanekiso we-DF oboniswe kuMfanekiso we-DF), apho i-Nb16W5O55 yinkqubo ye-crystalline edibeneyo enye, kunye ne-crystalline system. yenziwe nge-engile eqhelekileyo.

, Yenza iyunithi yesakhiwo kwi-4x5 octahedral nganye, njengoko kubonisiwe kwi-Fig.

Izinto ezimbini ziboniswa kumzobo ongezantsi, kwaye kukho iinkqubo ezintathu zokuphendula phakathi kwe-2.5-1.0V, kunye neqonga lombane malunga ne-1.

I-55V, kunye neqonga le-voltage malunga ne-1.55V, kunye ne-Li4TI5O12 impahla (1.55 V) ngokusondeleyo, kodwa amandla okubuyisela umva we-NB16W5O55 yezinto eziphathekayo ziphezulu kakhulu kunezinto ze-LTO, ezifikelela kwi-225 mAh / g kwi-C / 5 ratio, kunye nesixhobo se-NB16W5O55 sikwabonisa ukusebenza kakuhle kokukhulisa, ukonyusa ukhuliso lokutshaja ukuya kwi-5C.

(12min ukuxoka) usenako ukufikelela 171 mAh / g, nkqu ekwandiseni eliphezulu 20c (3min) nangoku ukuya 148mAh / g. Izinto eziphathekayo ze-NB16W5O55 azikho kuphela kwintsebenzo yokwandisa, kwaye kukho amandla aqinileyo ekusebenzeni komjikelo. Emva kwemijikelezo ye-250 yezinga le-10C, amandla okubuyisela umva afikelela kwi-95%, kwaye emva koko ukukhuliswa kwe-20C ngamaxesha angama-750, ibhetri iyabuyiswa.

Nangona kunjalo, u-Xiaobian ulapha ukuthetha ukuba umbhali ulapha, isicatshulwa esincinci, ekubhaqweni kwentsebenzo yokwandisa, kunye nenkqubo yokutshaja i-voltage eqhubekayo yongezwa ngexesha lenkqubo yokutshaja, kwaye ababhali ekubhaqweni komjikelo baya kuthi. yehlisa inkqubo yokutshaja ombane rhoqo. Sonke siyaqonda ukuba ukutshaja koxinzelelo rhoqo kuhambelana nomthamo wokutshaja iibhetri ezintsha, ngakumbi kumaxabiso aphezulu entlawulo, kubaluleke kakhulu, ke ababhali banokugqwesa kakhulu, kwaye umjikelo ususiwe kumjikelo ulingana nokunciphisa ubume beSOC. ibhetri iluncedo ekuphuculeni ukusebenza komjikelo. Kubonakala ngathi abantu basemzini baya kulumka! Iprobe ye-electrochemical ye-NB18W16O93 yezinto nayo ilungile kakhulu, kwaye iqonga layo lombane li-1.

I-67V, ku-C / 5 kunye namaxesha e-1C, ekubeni ubunzima be-mole ye-Nb18W16O93 bukhulu kakhulu, igram kufuneka ibe yi-20 mAh / g ngaphantsi kwe-NB16W5O55 impahla, kodwa ingaphezulu Kwi-magnification ephezulu, i-NB18W16O93 imathiriyeli igqwesileyo ekusebenzeni, kwaye umthamo obuyiselwayo ufikelela kwi-150 mAh / g phantsi kwe-20C, enokufikelela kwi-105 kunye ne-70 mAh / g kwi-60C kunye ne-100C yokukhulisa, ngokukhethekileyo ukusuka kwi-NB16W5O55 impahla. Ukusebenza okugqwesileyo kokukhulisa akuvumelekanga ukusuka kwi-coefficient ephezulu ye-Li + yokusasazwa kwezi zinto zimbini. Ukusuka kwitheyibhile engezantsi, kuyenzeka ukubona ukuba i-coefficient yokusasazwa kwezi zinto zimbini imalunga ne-10-12-10-13m2 / s, engaphezulu nangaphezu kokutshaja ngokukhawuleza kwe-titanate eqinile (10-16-10-15) ixesha elaneleyo ngokupheleleyo ukugqiba ukusasazwa ngaphakathi kwamasuntswana e-10um ububanzi, le nkcazo, nokuba izinto ezimbini kwisayizi ye-micrometer zisenakho ukufikelela kwisantya esiphezulu sokutshaja.

Ngelixa kuthelekiswa nezixhobo zegraphite zemveli, i-NB16W55 kunye ne-NB18W16O93 izixhobo ezimbini azinanzuzo kumthamo wegram kunye neqonga lombane, ukuba siqwalasela ukuxinana koxinzelelo, siya kufumanisa ukuba izinto ezimbini zingaphezulu Uxinzelelo oluphezulu oluphezulu ngoko lunenzuzo enkulu kakhulu. (njengoko kubonisiwe kumzobo ongezantsi) kumthamo weyunithi (eboniswe ngezantsi), kwi-1C yokukhulisa, i-NB16W5O55 umthamo weyunithi yezinto eziphathekayo inokufikelela kwi-550ah / L, nakwi-20C yokukhulisa Inokufikelela kwi-350AH / L, kunye ne-NB18W16O93 impahla inokufikelela. I-500ah / L kwi-1C yokwandisa, kusekho ukuya kwi-400ah / L kwi-20C yokwandisa, kunye nomthamo weyunithi yesixhobo segraphite kuphela i-100ah / L kuphela i-100AH ​​/ L Ekhohlo nasekunene, akukho phantse akukho mthamo kwi-20C yokwandisa. Le nkcazo ye-NB16W5O55 kunye ne-NB18W16O93 izinto ezimbini azikwazi ukuhambelana nezinto eziqhelekileyo zegraphite kubunzima bamandla obunzima, kodwa kumthamo wamandla omthamo, unenzuzo enkulu, ngakumbi ekukhuliseni okuphezulu, kwaye inzuzo iphantse ibe namandla. Kentj.

UGriffith uphuhlise i-NB16W5O55 kunye ne-NB18W16O93 izixhobo ezimbini zinee-coefficients ze-Li + eziphezulu kakhulu, ukwenzela ukuba ukusebenza okugqwesileyo kokukhulisa kunokufezekiswa kubungakanani bemicrometer, nangona ezi zixhobo zimbini azilungile njengemveli kubunzima xa kuthelekiswa namaqonga ombane. Izinto zegraphite, kodwa iimpawu zoxinaniso oluphezulu loxinzelelo lwenyani zenza ezi zinto zimbini zibonakaliswe inzuzo enkulu yezinto zegraphite kumthamo wamandla omthamo, kwaye loo nto inamathemba abanzi kwixesha elizayo. Okufunekayo kukwehla kweendleko).

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