Ukuqhubela phambili kuphando malunga nokulahleka kwe-thermal yokutshaja ibhetri ye-lithium

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Ushwankathelo: Isishwankathelo senkqubela phambili yamva nje kunye nethemba lophuhliso lokhuseleko oluphezulu lophando lwebhetri ye-lithium-ion. Okubalulekileyo ekuzinzeni kobushushu obuphezulu be-electrolytes kunye ne-electrodes, izizathu zokungazinzi kwe-thermal ye-lithium ion iibhetri kunye neendlela zabo ziye zacacisa ukuba inkqubo yebhetri ye-lithium-ion ekhoyo yorhwebo ayinakwanela kumaqondo okushisa aphezulu, iphakamisa ukuphuhlisa i-electrolyte yobushushu obuphezulu, ukuguqulwa okulungileyo kunye nokubi kunye nolawulo lwangaphandle lwebhetri, njl. ukuyila iibhetri ze-lithium-ion zokhuseleko oluphezulu.

Umbono kuphuhliso lwethemba lobugcisa lophuhliso lweebhetri ze-lithium-ion zokhuseleko. 0 Intshayelelo Iibhetri ze-lithium ion ziba ngummeli oqhelekileyo wohlobo olutsha lwamandla ngenxa yeendleko eziphantsi, ukusebenza okuphezulu, amandla aphezulu, kunye nokusingqongileyo okuluhlaza, esetyenziswa ngokubanzi kwiimveliso zedijithali ze-3C, amandla eselula kunye nezixhobo zombane. Kwiminyaka yakutshanje, ngenxa yokuqina kongcoliseko lokusingqongileyo kunye nesikhokelo somgaqo-nkqubo wesizwe, imarike yemoto yombane esekwe kwisithuthi sombane iye yandisa imfuno yeebhetri ze-lithium-ion, kwinkqubo yophuhliso lweenkqubo zebhetri ze-lithium-ion eziphezulu zamandla, imiba yokhuseleko lwebhetri itsale ingqalelo enkulu , Iingxaki ezikhoyo zifuna ukusombulula ngakumbi.

Ukutshintsha kweqondo lokushisa kwenkqubo yebhetri kuchongwa ngokuvela kobushushu kunye nokusabalalisa izinto ezimbini. Ukwenzeka kobushushu bebhetri ye-lithium ion kubalulekile kubangelwa ukusabela phakathi kokubola kwe-thermal kunye nezinto zebhetri. Ukunciphisa ukushisa kwenkqubo yebhetri kunye nokuphucula inkqubo yokusebenza kweqondo lokushisa eliphezulu, inkqubo yebhetri ikhuselekile.

Kwaye izixhobo eziphathwayo ezincinci ezifana neefowuni eziphathwayo, umthamo webhetri yelaptop ngokubanzi ungaphantsi kwe-2AH, kwaye amandla ohlobo lwebhetri ye-lithium-ion asetyenziswa kwizithuthi zombane ngokubanzi angaphezulu kwe-10ah, kwaye ubushushu bendawo buhlala bungaphezulu kwama-55 ° C ngexesha lomsebenzi oqhelekileyo, kwaye ubushushu bangaphakathi buza kufikelela kuma-300 ° C, Phantsi kobushushu obuphezulu okanye intlawulo yexabiso elikhulu kunye neemeko zokukhuphela, ubushushu becala liya kunyuka kuluhlu lobushushu kunye nokukhutshwa kwemeko, ekugqibeleni ubushushu bunokubangela ubushushu obuphezulu kunye neemeko zokukhuphela. ekhokelela ekuphumeni kwe-thermal ekulawuleni kunye nokutsha kwebhetri okanye ukuqhuma [3]. Ukongeza kwizinto zayo zokuphendula iikhemikhali, abanye abantu banesiphaluka esifutshane esibangelwa kukufudumala, ukugqithiswa, kunye nefuthe lomatshini, ezinye izinto ezenziweyo zinokukhokelela ekubeni kwenzeke ibhetri ye-lithium-ion ukubangela iingozi zokhuseleko. Ngoko ke, kubalulekile ukufunda kunye nokuphucula ukusebenza kokushisa okuphezulu kweebhetri ze-lithium-ion.

I-1 i-thermal out-of-control cause analysis of thermal out of control of lithium-ion battery ibalulekile kuba ukushisa kwangaphakathi kwebhetri kuphakama. Okwangoku, inkqubo ye-electrolyte esetyenziswa kakhulu kwiibhetri ze-lithium-ion zorhwebo yisisombululo esixubileyo se-carbonate ye-LiPF6. I-solvent enjalo ine-volatility ephezulu, i-flash point ephantsi, kulula kakhulu ukutshisa.

Xa isiphaluka esifutshane sangaphakathi esibangelwa ukungqubana okanye ukukhubazeka, intlawulo yezinga elikhulu kunye nokukhutshwa kunye nokudlula, kuya kubakho ubushushu obuninzi, okubangela ukunyusa izinga lokushisa kwebhetri. Xa ufikelela kubushushu obuthile, uthotho lweempendulo zokubola ziya kubangela ukuba ibhalansi ye-thermal yebhetri itshatyalaliswe. Xa ubushushu obukhutshiweyo ngolu hlobo lweekhemikhali alukwazi ukukhutshwa ngexesha, luya kwandisa ukuqhubela phambili kokusabela, kwaye kubangele uchungechunge lweempendulo zecala lokuzifudumeza.

Ubushushu bebhetri bukhuphuka ngokukhawuleza, oko kukuthi, "i-thermal ngaphandle kolawulo", ekugqibeleni ikhokelela ekutshisweni kwebhetri, kwaye ukuqhuma kwenzeka ngokukrakra. Ngokuqhelekileyo, imbangela ye-thermal ngaphandle kolawulo lwebhetri ye-lithium-ion ibalulekile ekungazinzini kwe-thermal ye-electrolyte, kunye nokungazinzi kwe-thermal ye-electrolyte kunye ne-electrode efanelekileyo kunye ne-negative coexistence. Okwangoku, ukusuka kwinkalo enkulu, ukhuseleko lweebhetri ze-lithium-ion lubalulekile kulawulo lwangaphandle kunye noyilo lwangaphakathi ukulawula ukushisa kwangaphakathi, i-voltage kunye noxinzelelo lomoya ukufezekisa iinjongo zokhuseleko.

2 Ukusombulula isicwangciso se-thermal esiphume kulawulo 2. Ulawulo lwangaphandle 1) icandelo le-PTC (i-coefficient yeqondo lokushisa elilungileyo): Faka icandelo le-PTC kwibhetri ye-ion ye-lithium, eqwalasela uxinzelelo kunye nobushushu ngaphakathi kwebhetri, kwaye xa ibhetri ifudunyezwa ngokugqithiswa, ibhetri yi-10 Ukuxhathisa kwandisa ukukhawulela okwangoku, kwaye umbane phakathi kweepali ezilungileyo kunye nezibi uyancitshiswa ukuya kumbane okhuselekileyo ukuqonda umsebenzi wokukhusela ngokuzenzekelayo webhetri. I-2) I-valve yobungqina bokuqhuma: Xa ibhetri inkulu kakhulu ngenxa yokungaqhelekanga, i-valve-proof proof is deformed, eya kufakwa ngaphakathi kwebhetri ukuba idibaniswe, ukuyeka ukutshaja.

I-3) I-Electronics: I-2 ~ 4 iipakethi zebhetri zinokufakela i-electronic circuit design i-lithium ion umkhuseli, ukuthintela ukugqithiswa kunye nokukhutshwa ngokugqithiseleyo, ukukhusela izingozi zokhuseleko, ukwandisa ubomi bebhetri. Ngokuqinisekileyo, ezi ndlela zokulawula zangaphandle zinempembelelo ethile, kodwa ezi zixhobo ezongezelelweyo zongeze ubunzima kunye neendleko zokuvelisa ibhetri, kwaye azikwazi ukusombulula ngokupheleleyo ingxaki yokhuseleko lwebhetri. Ngoko ke, kuyimfuneko ukuseka indlela yokhuseleko lwangaphakathi.

2.2 Ukuphucula i-electrolyte electrolyte electrolyte njengebhetri ye-lithium ion, ubume be-electrolyte bumisela ngokuthe ngqo ukusebenza kwebhetri, umthamo webhetri, ubushushu bokusebenza, ukusebenza komjikelo kunye nokusebenza kokhuseleko kubalulekile. Okwangoku, iinkqubo zesisombululo se-lithium-ion ibhetri ye-electrolytic, eyona nto isetyenziswa kakhulu yi-LIPF6, i-vinyl carbonate kunye ne-linear carbonate.

Umphambili sisithako esiyimfuneko, kwaye ukusetyenziswa kwabo kunemida ethile malunga nokusebenza kwebhetri. Ngelo xesha, inani elikhulu lokubilisa okuphantsi, indawo ephantsi ye-flash ye-carbonate solvent isetyenziswe kwi-electrolyte, eya kuba ngamaqondo aphantsi. Flash, kukho ingozi enkulu yokhuseleko.

Ngoko ke, abaphandi abaninzi bazama ukuphucula inkqubo ye-electrolyte ukuphucula ukusebenza kokhuseleko lwe-electrolytes. Kwimeko apho izinto eziphambili zomzimba webhetri (kubandakanya izinto ze-electrode, izinto ze-diaphragm, izinto ze-electrolyte) azitshintshi ngexesha elifutshane, ukuzinza kwe-electrolyte yindlela ebalulekileyo yokuphucula ukhuseleko lweebhetri ze-lithium ion. 2.

2.1 Izongezo ezisebenzayo zokongeza zinedosi encinci, into ekujoliswe kuyo. Oko kukuthi, inokuphucula kakhulu ukusebenza kwebhetri ethile enkulu ngaphandle kokutshintsha inkqubo yemveliso ngaphandle kokutshintsha okanye akukho xabiso litsha lebhetri.

Ngoko ke, izongezelelo zokusebenza ziye zaba yindawo eshushu kwibhetri ye-lithium-ion yanamhlanje, enye yezona ndlela zithembisayo okwangoku ziyisisombululo esithembisayo se-pathogenic ye-lithium-ion battery electrolyte. Ukusetyenziswa okusisiseko kwesongezo kukuthintela ubushushu bebhetri ukuba bube phezulu kakhulu kwaye amandla ombane ebhetri anqunyelwe kuluhlu lolawulo. Ngoko ke, ukuyila kwesongezo kuqwalaselwa kwakhona kwimbono yeqondo lokushisa kunye nokutshaja.

Idibansi ebuyisela idangatya: Isidibanisi esibuyisela idangatye sinokwahlulwa ngokwendalo ephilayo phosphorus idangatye longezo, initrogen equlathe ikhompawundi edityaniswe nedangatye edityanisiweyo, isidibanisi esibuyisela idangatye esisekwe kwisilicon, kunye nesidibanisi esidityanisiweyo sedangatye. Iindidi ezi-5 ezibalulekileyo. Organic phosphorescell-flame retardant: Okubalulekileyo kubandakanya ialkyl phosphate, alkyl phosphite, fluorinated phosphate, kunye nephosphate nitrile compounds.

Indlela yokubuyiswa komlilo ibalulekile kwitsheyina leemolekyuli ezibuyisela idangatye eziphazamisana neeradicals zasimahla zehydrogen, ezaziwa ngokuba yinkqubo yokubamba iradical free. Ukubola kwe-gasification eyongeziweyo kukhupha i-phosphorus-equlethe i-radicals yasimahla, ukukwazi kweeradicals zasimahla ukuphelisa ukusabela kwekhonkco. I-Phosphate flame retardant: I-phosphate ebalulekileyo, i-triethyl phosphate (TEP), i-tributyl phosphate (TBP), njl.

I-Phosphate nitrile ikhompawundi efana ne-hexamethyl phosphazene (HMPN), i-alkyl phosphite efana ne-trimethyl phosphite (TMPI), ezintathu - (2,2,2-trifluoroethyl), i-phosphite (TT- FP), i-fluorinated acid ester, njenge-three-(2,2,2-trifluoroethyl) i-trifluoroethyl) i-difluoroethyl 2, i-2 fluoroethyl) i-phosphate (BMP) , (2,2,2-trifluoroethyl) - i-diethyl phosphate (TDP), i-phenylphosphate (DPOF), njl. sisidibanisi esibuyisela idangatye elungileyo. I-phosphate idla ngokuba ne-viscosity enkulu ngokwentelekiso, uzinzo olulambathayo lwe-electrochemical, kwaye ukongezwa kwe-flame retardant nako kunefuthe elibi kwi-ionic conductivity ye-electrolyte kunye nokubuyela umva kokujikeleza kwe-electrolyte ngelixa unyusa ukugqama kwe-electrolyte.

Ngokuqhelekileyo: 1 umxholo wekhabhoni wamaqela amatsha e-alkyl; Iqela eli-2 elinevumba elimnandi (phenyl) lemoiety endaweni yeqela lealkyl; I-3 yenza i-cyclic structure phosphate. Imathiriyeli ye-halogenated ye-organic (i-halogenated solvent): i-organic halogenic flame retardant ibalulekile kumkhuhlane womkhuhlane. Emva kokuba i-H ithathelwe indawo ngu-F, iipropati zayo ezibonakalayo zitshintshile, ezifana nokunciphisa indawo yokuncibilika, ukunciphisa i-viscosity, ukuphuculwa kweekhemikhali kunye nokuzinza kwe-electrochemical, njl.

I-organic halogenic flame retardant ibalulekile ukubandakanya i-fluorocyclic carbonates, i-fluoro-chain carbonates kunye ne-alkyl-perfluorodecane ether, njl. I-OHMI kunye nolunye uthelekiso lwe-ether ye-fluororethyl, iikhompawundi ezine-fluoride ezine-fluoride zibonise ukuba ukongezwa kwe-33.3% (iqhezu lomthamo) 0.

I-67 mol / lliclo4 / Ec + DEC + PC (i-volume ratio 1: 1: 1) i-electrolyte inomlinganiselo ophezulu we-flash point, amandla okunciphisa angaphezulu kwe-organic solvent EC, i-DEC kunye ne-PC, enokuthi ifake ngokukhawuleza ifilimu ye-SEI ebusweni begraphite yendalo, iphucule intlawulo yokuqala kunye nokukhutshwa komthamo weCullen kunye nokukhutshwa komthamo. I-fluoride ngokwayo ayinayo ukusetyenziswa komsebenzi we-radical wamahhala wokubamba i-flame retardant echazwe ngasentla, kuphela ukuhlambulula izinyibilikisi eziphezulu eziguquguqukayo nezinokutsha, ngoko kuphela umlinganiselo wevolumu kwi-electrolyte ubukhulu becala (70%) Xa i-electrolyte ayinakutsha. I-composite flame retardant: I-composite flame retardant esetyenziswa ngoku kwi-electrolyte ine-PF compound kunye ne-NP-class compound, izinto ezimele zine-hexamethylphosphoride ebalulekileyo (HMPA), i-fluorophosphate, njl.

Idangatye elibuyisela idangatye linesiphumo sokubuyiswa komlilo ngokusebenzisa intsebenziswano yezinto ezimbini ezibuyiswa ngamadangatye. FEI et al. Iphakamisa ezimbini ze-NP flame retardants MEEP kunye ne-MEE, kunye nefomula yayo ye-molecular iboniswe kuMfanekiso 1.

Licf3SO3 / MeEP :PC = 25:75, i-electrolyte inokunciphisa ukutsha kwe-90%, kunye ne-conductivity inokufikelela kwi-2.5 × 10-3S / cm. I-2) I-additive e-overcharged: Uluhlu lweempendulo zenzeke xa ibhetri ye-lithium-ion ihlawuliswa kakhulu.

I-electrolyte component (ibalulekile i-solvent) i-inveraffling ebusweni be-oxidative decomposition reactions kumphezulu we-electrode ephilileyo, igesi iveliswa kwaye ubuninzi bobushushu bukhutshwa, okubangela ukwanda koxinzelelo lwangaphakathi lwebhetri kunye nokunyuka kweqondo lokushisa, kwaye ukhuseleko lwebhetri luchaphazeleka kakhulu. Ukusuka kwindlela yenjongo, i-additive yokukhusela i-overchaul ibalulekile kwi-oxidative stripping power-type kunye neentlobo ezimbini ze-polymerization yombane. Ukusuka kuhlobo lwesongezo, lunokwahlulwa lube yi-lithium halide, i-metallocene compound.

Okwangoku, i-adaprase eyongezelelweyo eyongezelelweyo eyongezelelweyo (i-BP) kunye ne-cyclohexylbenzene (CHB) kwi-redox anti-overchard additives ngumgaqo xa i-voltage yokutshaja idlula i-voltage ye-cutoff eqhelekileyo, i-additive iqala kwi-electrode efanelekileyo. Ukusabela kwe-oxidation, imveliso ye-oxidation isasazeka kwi-electrode engalunganga, kwaye ukusabela kokunciphisa kwenzeka. I-oxidation ivaliwe phakathi kwezibonda ezilungileyo kunye nezibi, zifunxa intlawulo engaphezulu.

Izinto zayo ezimeleyo zine-ferrocene kunye ne-derivative yayo, i-ferrid 2,2-pyridine kunye ne-complex ye-1,10-edacent glenoline, i-thiol derivative. Ibhloko yePolymerization i-anti-filled additive. Izinto ezimele ziquka i-cyclohexylbenzene, i-biphenyl kunye nezinye izinto.

Xa i-biphenyl isetyenziswe njenge-additive pre-charged, xa i-voltage ifikelela kwi-4.5 ukuya kwi-4.7V, i-biphenyl eyongeziweyo i-electrochemically polymerized, yenza umaleko wefilimu eqhubayo kumphezulu we-electrode echanekileyo, ukwandisa ukuchasana kwangaphakathi kwebhetri, ngaloo ndlela inciphisa ibhetri yokukhusela ngoku.

2.2.2 I-ion liquid ion liquid electrolyte yenziwe ngokupheleleyo yi-yin kunye ne-cation.

Ekubeni i-interi ion okanye i-cationic volumes ibuthathaka, i-intermediate ibuthathaka, ukusabalalisa i-electron ayilingani, kwaye i-oan-censoon inokukhululeka ukuhamba kwiqondo lokushisa, elimanzi. Inokwahlulwa ibe imidazole, pyrazole, pyridine, quaternary ammonium ityuwa, njl. Xa kuthelekiswa ne-solvent eqhelekileyo yeebhetri ze-lithium ion, i-ionic liquids ineenzuzo ezi-5: 1 ukuzinza okuphezulu kwe-thermal, i-200 ° C ayikwazi ukubola; Uxinzelelo lomphunga olu-2 luphantse lube yi-0, musa ukuba nexhala malunga nebhetri; Ulwelo olu-3 lwe-ayoni alukho lula ukutsha Akukho kudleka; I-4 ine-conductivity ephezulu yombane; I-5 yekhemikhali okanye ukuzinza kwe-electrochemical kulungile.

I-AN okanye ifom efana ne-PP13TFSI kunye ne-1Mollipf6ec / Dec (1: 1) kwi-electrolyte, enokufikelela kwimiphumo engeyiyo i-fuel ngokupheleleyo, kwaye yongeze i-2 wt% ye-liboB yokongeza kule nkqubo ukuphucula kakhulu ukuhambelana kojongano. Ingxaki kuphela ekufuneka isonjululwe yi-conductivity ye-ion kwinkqubo ye-electrolyte. 2.

2.3 Ukukhetha ukuzinza kwe-thermal ye-lithium ityuwa ye-hexafluorophosphate (LiPF6) i-electrolyte ityuwa ye-lithium esetyenziswa ngokubanzi kwi-battery ye-lithium-ion yempahla. Nangona ubume bayo obunye abulunganga, ukusebenza kwayo iyonke yeyona inenzuzo.

Nangona kunjalo, i-LiPF6 nayo inobubi bayo, umzekelo, i-LiPF6 yikhemikhali kwaye i-thermodynamically ayizinzile, kwaye impendulo iyenzeka: LIPF (6S) → LIF (S) + PF (5G), i-reaction eyenziwa yi-PF5 kulula ukuhlasela i-solvent ye-organic kwi-athomu ye-oksijini I-Lonely to electrons, okukhokelela kwi-loop evulekileyo ye-polymerization ye-polymerization ye-polymerization ephezulu kunye ne-ether ephezulu yokushisa. Uphando lwangoku kwiqondo eliphezulu leetyuwa ze-electrolyte ligxininiswe kwiindawo zetyuwa ze-lithium eziphilayo. Izinto ezimele zibalulekile nge-boron-based salts, i-imine-based lithium salts.

I-LIB (C2O4) i-2 (i-liboB) ityuwa ye-electrolyte esanda kwenziwa kwiminyaka yamuva. Inezinto ezininzi ezintle kakhulu, ukubola kwamaqondo okushisa angama-302 ° C, kunokwenza ifilimu ye-SEI ezinzileyo kwi-electrode engalunganga. Ukuphucula ukusebenza kwegraphite kwi-PC esekelwe kwisisombululo se-electrolytic, kodwa i-viscosity yayo inkulu, i-impedance yefilimu ye-SEI eyenziwe [14].

Ubushushu bokubola kwe-LIN (SO2CF3) 2 (Litfsi) yi-360 ° C, kunye ne-ion conductivity kubushushu obuqhelekileyo bungaphantsi kancinane kune-LiPF6. Ukuzinza kwe-electrochemical kulungile, kwaye amandla e-oxidation malunga ne-5.0V, eyona tyuwa ye-lithium ephilayo, kodwa i-Serious corrosion ye-Al base set fluid.

2.2.4 I-Polymer Electrolyte Iibhetri ezininzi ze-lithium ion zisebenzisa izinyibilikisi ezivuthayo kunye ne-volatile carbonate, ukuba ukuvuza kunokubangela umlilo.

Oku ngakumbi ibhetri ye-lithium-ion enamandla yomthamo ophezulu, ubuninzi bamandla aphezulu. Esikhundleni sokusebenzisa i-electrolyte ye-polymer engathembekanga endaweni ye-electrolyte engamanzi e-organic enokutsha, inokuphucula kakhulu ukhuseleko lweebhetri ze-lithium-ion. Uphando lwe-polymer electrolyte, ngakumbi i-gel-type polymer electrolyte yenze inkqubela phambili enkulu.

Okwangoku, isetyenziswe ngempumelelo kwiibhetri ze-lithium-ion zorhwebo. Ngokokuhlelwa komzimba wepolymer, i-gel polymer electrolyte ibalulekile ngezi ndidi zintathu zilandelayo: i-PAN-based polymer electrolyte, i-PMMA polymer electrolyte, i-PVDF-based polymer electrolyte. Nangona kunjalo, i-gel-uhlobo lwe-polymer electrolyte eneneni sisiphumo sokulungelelaniswa kwe-polymer electrolyte eyomileyo kunye ne-electrolyte compromise ye-liquid, kwaye iibhetri ze-polymer zohlobo lwe-gel zisenomsebenzi omninzi ekufuneka wenziwe.

2.3 Izinto eziphathekayo zinokugqiba ukuba izinto ezichanekileyo ze-electrode aziqinisekanga xa i-voltage ye-state yokutshaja ingaphezulu kwe-4V, kwaye kulula ukuvelisa ukushisa okuchithwe kumaqondo aphezulu okushisa ukubola i-oksijeni, i-oksijeni kunye ne-solvents eziphilayo ziqhubeka zisabela kwisixa esikhulu sobushushu kunye nezinye iigesi, ukunciphisa ukhuseleko lwebhetri [2, 17-19]. Ngoko ke, ukuphendulwa kwe-electrode efanelekileyo kunye ne-electrolyte kuthathwa njengento ebalulekileyo yokushisa.

Ngokubhekiselele kwizinto eziqhelekileyo, ukuphucula indlela eqhelekileyo yokhuseleko lwayo kukuguqulwa kwengubo. Ukugubungela umphezulu wezinto ezintle ze-electrode kunye ne-MgO, A12O3, SiO2, TiO2, ZnO, SnO2, ZrO2, njl., Inokunciphisa ukusabela kwe-Die +-rear positive kunye ne-electrolyte ngelixa unciphisa i-chromatography ye-electrode efanelekileyo, inqanda ukuguqulwa kwesigaba se-electrode positive substance.

Ukuphucula ukuzinza kwayo kwesakhiwo, ukunciphisa ukuxhathisa ukuphazamiseka kwe-cation kwi-lattice, ngokunciphisa ukusabela okwesibini kwenkqubo yokujikeleza. 2.4 Izinto zeCarbon okwangoku zisebenzisa indawo ephantsi yendawo ethile, iqonga eliphezulu lokutshaja kunye nokukhupha, iqonga elincinci lokutshaja kunye neqonga lokukhupha, ukuzinza okuphezulu kwe-thermal, imeko ye-thermal elungileyo, i-thermostability ephezulu, i-thermostability ephezulu, i-thermostability ephezulu.

Ezifana ne-intermediate phase carbon microspheres (MCMB), okanye i-Li9Ti5o12 yesakhiwo se-spinel, esingcono kunozinzo lwesakhiwo se-laminated graphite [20]. Indlela yokuphucula ngoku ukusebenza kwezinto zekhabhoni ibalulekile kunyango lwe-surface (i-oxidation yobuso, i-halogenation yomhlaba, i-carbon cladding, i-coating metal, i-oxide yensimbi, i-polymer coating) okanye ukwazisa i-doping yesinyithi okanye engeyiyo-metallic. 2.

I-5 I-diaphragm esetyenziswa ngoku kwiibhetri ze-lithium-ion zorhwebo iseyinto ye-polyolefin, kwaye ukungabikho kwayo okubalulekileyo kushushu kwaye ukungena kwe-electrolytic fluid kubi. Ukuze unqobe ezi ziphene, abaphandi baye bazama iindlela ezininzi, ezifana nokukhangela izinto zokuzinza kwe-thermal, okanye ukongeza inani elincinci le-Al2O3 okanye i-SiO2 nanopowdia, engenalo nje i-diaphragm eqhelekileyo, kodwa ibuye ibe ne-thermal stability yezinto ezilungileyo ze-electrode. sebenzisa.

I-MIAO et al, i-polyimide nano nonwoven fabrication eyenziwe ngendlela ye-electrostatic spinning. Iimpawu ze-DR kunye ne-TGA-ezifana ne-TGA zithetha ukuba azikwazi ukugcina ukuzinza kwe-thermal kuphela kwi-500 ° C, kodwa kunye nokungena kwe-electrolyte engcono ngokumalunga ne-diaphragm ye-CELGARD. I-WANG et al ilungiselelwe i-AL2O3-PVDF i-nanoscopic microporous membrane, ebonisa iimpawu ezintle ze-electrochemical kunye nokuzinza kwe-thermal, ukwanelisa ukusetyenziswa kwe-separators ye-lithium-ion battery.

I-3 Isishwankathelo kwaye sijonge phambili kwiibhetri ze-lithium-ion kwiimoto zombane kunye nokugcinwa kwamandla, okungaphezulu kakhulu kunezixhobo ezincinci ze-elektroniki, kwaye indawo yokusetyenziswa inzima kakhulu. Isishwankathelo, sinokubona ukuba ukhuseleko lwayo lukude nokusombulula, kwaye luye lwaba yi-bottleneck yobugcisa yangoku. Umsebenzi olandelayo kufuneka ube nzulu kwimpembelelo ye-thermal enokuthi ibhetri ibangele emva kokusebenza okungaqhelekanga, kwaye ufumane indlela efanelekileyo yokuphucula ukusebenza kokhuseleko lwebhetri ye-lithium ion.

Okwangoku, ukusetyenziswa kwe-fluorine-containing solvent kunye ne-flame retardant additints yindlela ebalulekileyo yokuphuhlisa ibhetri ye-lithium-ion yokhuseleko. Indlela yokulinganisa ukusebenza kwe-electrochemical kunye nokhuseleko oluphezulu lobushushu luya kuba lugxininiso lophando lwexesha elizayo. Ngokomzekelo, i-high-performance composite flame retardant integral integral isethi P, N, F, kunye ne-CL iphuhliswa, kunye ne-solvent ye-organic enendawo yokubilisa ephezulu, i-flash point iphuhlisiwe, kunye nesisombululo se-electrolytic sokusebenza okuphezulu kokhuseleko kuveliswa.

Iiretadants ezidityanisiweyo zomlilo, izongezo zemisebenzi emibini nazo ziya kuba ziindlela zophuhliso kwixesha elizayo. Ngokumalunga ne-lithium ion ibhetri ye-electrode impahla, iipropathi zekhemikhali zomphezulu zezinto zahlukile, inqanaba lobuzaza besixhobo se-electrode kwintlawulo kunye nokukhupha amandla akuhambisani, kwaye akunakwenzeka ukusebenzisa i-electrode / i-electrolyte / izongezelelo ezininzi kuzo zonke iziseko zoyilo lwebhetri. Ngoko ke, kwixesha elizayo, kufuneka sigxininise ekuphuhliseni iinkqubo ezahlukeneyo zebhetri kwizinto ezithile ze-electrode.

Kwangaxeshanye, ikwaphuhlisa inkqubo yebhetri ye-lithium-ion enokhuseleko oluphezulu okanye uphuhliso lwe-electrolyte eqinileyo ye-inorganic ene-cation conductive enye kunye nothutho lwe-ion olukhawulezayo kunye ne-thermostability ephezulu. Ukongeza, ukuphucula ukusebenza kolwelo lwe-ionic, ukuphuhlisa iinkqubo zokwenziwa ezilula nezingabizi kakhulu kukwayinxalenye ebalulekileyo yophando lwexesha elizayo.