How to say about the power lithium battery technology improvement, listen to Wu Feng and other four academicians

Umbhali :Iflowpower-UMboneleli weSikhululo saMandla esiphathwayo

NgoDisemba, inkomfa yesixhenxe yezenzululwazi kunye neteknoloji entsha yeGuoxuan High-Tech yabanjwa eHefei. Iindlela zeteknoloji yebhetri, iindlela zokusetyenziswa kwebhetri ephezulu, njl., njl.

I-Academician Wu Feng: Ibhetri eNtsha yeSekondari kunye neZixhobo zayo eziPhambili Inkqubela phambili yoPhando lwelizwe lam i-Academician, iYunivesithi yaseBeijing yeSayensi kunye neTekhnoloji yeemfuno zesicelo sikaNjingalwazi uWu Feng buninzi, ngoko ke ukuphuhlisa ukusebenza okuphezulu kokucoca iibhetri zasesekondari kuba yimvumelwano yabantu. Ngokuphuculwa okuqhubekayo kobomi besithuthi sombane, kuthenjwa ukuba uxinzelelo lubekwe kumzimba webhetri ye-lithium-ion ngexesha elifanayo, ngelixa libona ukubaluleka kwebhetri ye-lithium-ion, ikwaqwalaselwa izalathi zoshishino. indlela.

Ngokukodwa, njengoxinano lwamandla ebhetri lwezalathi eziphambili, indlela yokuthathela ingqalelo ukhuseleko, umjikelo, kunye nokwandiswa, njl. I-973 Research Project inezigaba ezithathu ukususela ngo-2002, kwaye iprojekthi yagqitywa ngo-2017.

Kulindeleke ukuba kwandiswe kwi-2019. Le projekthi ibalulekile ukufunda iinkqubo ezichanekileyo, ukuqala "kwizinto ezikhanyayo, i-multi-electronic response" izinto eziphathekayo, ezidibaniswe nemiphumo ye-polyionic, ukuphuhlisa izinto eziphezulu ze-electrode, kunye nokwakha i-high-specific. iibhetri zesibini; okwesibini, uxinaniso lwamandla aphezulu Inkqubo yamandla aphezulu, ayisebenzi kuphela kwiimoto zokuqhuba zombane zelizwe lam, kodwa ingasetyenziswa kwikhompyuter, ke iqela le-R & D linethemba lokufumana amandla aphezulu kunye noxinzelelo lwamandla aphezulu ebhetri ngolawulo lwe. multi-dimensional multi-scale multi-scale imisebenzi yojongano electrode. Kwakhona, iteknoloji yokhuseleko, iqela le-R & D liqala ukusuka kwinqanaba eliphambili lokulungelelanisa kunye nokusika i-electrode reaction, ukwandisa ukhuseleko lwebhetri yeseli, ngokujonga umda wokhuseleko webhetri, iphucula ukhuseleko lwebhetri. inkqubo, ngolungiselelo oluphambili lwekhemikhali, Uphuculo oluhle lwenkqubo kunye nezixhobo, ukuphucula ukhuseleko lokwenziwa nokusetyenziswa kwebhetri; ekugqibeleni ukunciphisa ubomi bebhetri, uhlaziyo, ukuvuselelwa kwezixhobo, ukuvuselelwa kwezibonelelo, kunye nokuhlaziywa kwemithombo, kunye nokusetyenziswa ngokutsha kwemithombo yokubuyisela uhlaza, ukuhlaziywa kwemithombo, kunye nokuhlaziywa kwezixhobo, kunye nokuhlaziywa kwezixhobo, kunye nokuhlaziywa kwemithombo, kunye nokusetyenziswa ngokutsha kwezixhobo eziluhlaza. ukubuyiswa, ukuveliswa ngokutsha kwezibonelelo, kunye nokuhlaziywa kwezibonelelo, kunye nokuhlaziywa kwezibonelelo.

Sebenzisa iindleko. Ngokubhekiselele kwibhetri ye-lithium-ion ephezulu kunye nezinto ezinxulumene nazo, kuyimfuneko ukuphucula ubuninzi bamandla ebhetri. Izinto eziphathekayo kufuneka zibe yinyathelo lokuqala, ziphuhlise izinto eziphezulu eziphezulu zezakhiwo ezitsha ze-heterogeneous, kunye nokwakha kunye nezinto ze-lithium ngokusebenzisa i-spinel skin layers.

Ukuphuculwa kabini kumthamo othile kunye nokwandiswa emva kwekhava ye-nanocrystalline; Inkunkuma yombane engalunganga yimathiriyeli ekrwada kwinkunkuma yamashishini kwinkqubo yokuvelisa i-silicone ion, kunye ne-silicon nano ion kunye nombane oqhutywayo ziphunyezwa ngepolymer eqhubayo. Indibano eguquguqukayo. Ngokucebisa ukucinga kwezemfundo kwamandla ebhetri, i-multi-electronic, i-multi-ion reactivity, ukwaphula ukusebenza kokubonakaliswa kwe-electron enye, ukuvula umbono wophando wezinto zebhetri, ngokusebenzisa i-synergies ye-multivariate, ukuqonda ukuxinana kwamandla Amanyathelo amathathu.

Nge-2020 ibhetri yenkunkuma iya kufikelela kwiitoni ze-1.70,000, eyenza ibhetri ye-lithium-ion ibhetri ibe ngumsebenzi osondeleyo. Isixhobo sebhetri esifunyenweyo sinokuphinda sihlaziywe.

Kwiminyaka emibini edlulileyo, indlela eluhlaza yokubuyisela ukusebenza kakuhle kwe-asidi yendalo ye-succinic iyaphuhliswa. Uphononongo lokusetyenziswa kwe-carbon adsorbents ekusebenziseni inkunkuma ye-lithium-ion iibhetri, kunye nesixa se-phosphorus adsorption siphezulu njenge-588μg / g, okwangoku ephezulu. Enye ye-carbon adsorbents, kunye ne-adsorbent emva kokunyanga kwe-lindle ingasetyenziswa njengesichumiso sokukhululwa esizinzileyo somhlaba, ngoko kunentsingiselo enkulu ukuhlola ukubuyiswa kwamandla ebhetri ye-lithium-ion kule miba.

Isifundiswa sentlanganiso: igraphene kwindawo yokugcina amandla e-electrochemical yelizwe lam iAkhademi yeSayensi, iAkhademi yaseTshayina yeSayensi iqhube kakuhle kakhulu, ngoko ke igraphene ithathwa njengelunge kakhulu kwiinkalo ezininzi. isicelo. Kodwa ukufumana isicelo esilungileyo, eyona nto ibalulekileyo kukufumana umgangatho ophezulu wegraphene kwimeko yexabiso eliphantsi.

Ukulungiswa kwegraphene kuneendlela ezintlanu ezibalulekileyo, kunye nokuhluthwa kweekhemikhali kunye neendlela zokubeka umphunga wekhemikhali ukulawula isixa esipheleleyo, kwaye iindleko zinokugcinwa. Ngenxa yeempawu zesakhiwo se-dimensional-dimensional, iimpawu ze-ultra-thin, conductivity ephezulu, ukusebenza kweemolekyuli eziphezulu, indawo enkulu yendawo ethile, umsebenzi olula, ukuzinza, njl., Inokufumaneka kwiibhetri okanye ezinye izixhobo.

Ukusetyenziswa kwayo kubandakanya izinto ezisebenzayo, uthungelwano oluqhubayo, i-catalysts, i-interface materials, izinto ze-matrix, kunye nezinto ezinjalo, azikhawulelwanga kwiibhetri zetsimbi ezifana neebhetri ze-lithium ion, kubandakanywa izixhobo zokugcina amandla ezidlula i-capacitors okanye nokuba ziguquguqukayo. Oku kulandelayo ngenye yenkqubela phambili yophando lwangoku lwegraphene, engekasetyenziswa kwisicelo: okokuqala, kwibhetri ye-lithium ion kunye ne-supercapacitor. Okokuqala, igraphene ingasetyenziselwa njengento yokugquma i-metal agglomeration, kwaye ingasetyenziselwa njenge-additive conductive.

Ukongeza, igraphite inokuba negative, ngaba igraphene? Emva kophononongo, igraphene ibinomthamo ophezulu, kodwa amandla angenakuguqulwa nawo aphezulu kakhulu, ukusebenza kakuhle kwesicelo kuphantsi kakhulu, ngoko ke kunzima ukusebenzisa igraphene ukwenza izibonda ezingezizo. Nangona kunjalo, i-graphene iphezulu-specific, isityebi kumaqela asebenzayo ingaphinda isetyenziswe njengenye isicelo, edibeneyo okanye i-hybrid enezixhobo eziphezulu. Kwinqanaba lokuqala, ndacinga ukuba iya kuba yi-graphene edibeneyo kunye nee-oxides ukusebenzisa igraphene.

Ukuthintela i-agglomeration, utshintsho lwevolyum, kunye ne-stack yegraphene, ngelixa igraphene nayo yenza inethiwekhi elungileyo eguqukayo. Ekubeni i-graphene ineziphene ezininzi, i-oxide yenziwe lula ukwenza i-particle oxide particles ngasentla, ngaloo ndlela iphucula ukusebenza kunye nomthamo. Ubume bayo besakhiwo kwakhona luhlobo lwe-synthesis.

Okwesibini, i-graphene ekusebenziseni iibhetri ze-lithium sulfur, uphando lwangoku lusebenza kakhulu. Xa ujongene nengxaki yomxholo ophantsi kunye nomthwalo ophantsi wesulfure, i-graphene ingasetyenziselwa ukuphucula ibhetri yesulfure ye-lithium, njengokunciphisa okanye ukudibanisa kweekhemikhali, okanye ngokuzuza ilifa lesakhiwo se-electrode. Okwesithathu, ukusetyenziswa okunokwenzeka kwegraphene kwindawo yokugcina amandla.

Igraphite isetyenziswa kwiintlobo ngeentlobo zezixhobo zokugcina amandla, kodwa kunye nokusetyenziswa okwahlukileyo, kodwa uphando lwangoku lufumanisa ukuba akukho nokwenzeka ukubiza iwaka leekhilomitha lokutshaja imizuzu esibhozo. I-Academician ye-Sun Shigang: Uyilo lwesakhiwo, ukulawulwa kokusebenza kunye nenkqubo yokudibanisa ye-lithium-ion ibhetri ye-electrode materials, izifundiswa, ilizwe lam i-Academy of Sciences, iYunivesithi yaseXiamen, i-Sun Shigang, isithuthi sombane esikhula ngokukhawuleza kunye nokugcinwa kwamandla okulinganisa ukubeka phambili ngakumbi nangaphezulu. iimfuno ezifunayo, le nto ibaluleke kakhulu yi-catalyst ye-fuel power lithium ibhetri, enokuhlawula izinto zebhetri. Ngokubhekiselele kwisakhiwo sezinto zebhetri, i-ion ze-lithium zijikeleza, enye yinguquko, njenge-electrode yangoku ye-electrode i-graphite, umthamo weebhetri zentengiso akwanelanga, ukuba ibe yinto entsha, njenge-oxide yensimbi, i-Silicon. , njl.

, iingxaki eziziswa zezi zixhobo emva kokuba umthamo wongezwe, kwaye ezi zinto zinokwandiswa. Emva kokuba ukukhutshwa kukhutshwe, umthamo uya kuncipha, kwaye nayiphi na into iya kulimaza, eyona nto inzima. Ukuba umzimba unokusekwa kwimilo yoyilo lwezinto ezimbi ze-electrode, kukho ukusebenza okungcono, ukuzinza komjikelezo ongcono.

Emva kwe-loop ukuya kumaxesha angama-200, ayiyi kuphumelela, kodwa iya kwanda, oku kuhluke kwizinto eziqhelekileyo. Kukho iintlobo ezininzi zezinto ezintle ze-electrode, ukuba nomthamo olungileyo, ukusabela kwe-electron ezininzi, ukukhanya, kodwa eneneni, ukwandiswa kwezinto ezilungileyo ze-electrode nazo zibalulekile, kuba oku kuhambelana nokuhanjiswa kwe-lithium ion, i-channel yokuhambisa, njl.

Isakhiwo esivulekileyo, i-lithium ion kulula ukudlula kwesi sakhiwo, ukusuka kule ngqiqo, oku kuyimpembelelo enkulu ekuhanjisweni kwe-lithium ion. Ukongeza kwizinto eziphathekayo ze-electrode kunye ne-electrode engafanelekanga, ibhetri ye-lithium ion nayo ibalulekile. Ukusuka kwiindlela zemolekyuli ezithe tyaba kunye ne-microscopic ukuqonda ubume bojongano lwenguquko kunye nenkqubo yokusabela, uyilo olunengqiqo, kunye nolawulo lwezixhobo zamandla e-electrochemical, eziphuculwe kakhulu, ezibaluleke ngakumbi.

Isifundiswa saseZheng Mianping: Ukusetyenziswa ngokubanzi kwezixhobo zelithium ezizayo, izifundiswa zelizwe lam iAkhademi yobuNjineli, uZheng Mianping, uMlawuli weZiko leYanhu yelizwe lam, iTshayina, ilizwe lam, iTshayina, iTshayina, iTshayina, iQinghai, iTibet, iTibet 85 %. Kukho iimpawu ezininzi zezixhobo ze-lithium zelizwe lam: okokuqala, ugxininiso oluphezulu luphezulu; okwesibini, iindidi, okwesithathu, zonke idiphozithi edibeneyo yamacandelo amaninzi. Ke ngoko, nikela ingqalelo ekusetyenzisweni ngokupheleleyo.

Iingcebiso malunga nophuhliso kunye nokusetyenziswa kwe-lithium yelizwe lam: Eyokuqala kukuqinisa ngakumbi uphando lwezixhobo ze-lithium kunye nophando ngokwembono yendalo; okwesibini kukunyusa inkxaso yoshishino lwe-lithium; eyesithathu kukuphucula ngakumbi inkqubo; Okwesine kukuqinisa uphando nophuhliso lwenzululwazi nobuchwepheshe, ukusungula izinto ezintsha zokuqhuba iteknoloji kunye nokusetyenziswa okubanzi; eyesihlanu kukudibanisa izandla. .