Zeziphi izizathu ezichaphazela iibhetri ze-iron phosphate ion ukusebenza kobushushu obuphantsi uyazi?

2022/04/08

Umbhali :Iflowpower-UMboneleli weSikhululo saMandla esiphathwayo

Ukuqhuba kakubi, isantya sokusasazwa kwe-lithium ion siyacotha. Xa ixabiso eliphezulu kunye nokukhutshwa, inani langempela liphantsi, le ngxaki yinto enzima ukukhawulela uphuhliso lwe-lithium iron phosphate industry. I-lithium iron phosphate ayinalo uluhlu olubanzi lwezicelo kade, lo ngumba obalulekileyo.

Nangona kunjalo, ukuqhuba kakubi okwangoku sisisombululo esifanelekileyo: yongeza i-C okanye enye i-agent eqhubayo. Okwangoku, kwinkqubo yokuvelisa yokwenene, phucula ukuhanjiswa kwezinto ngokudibanisa imithombo ye-carbon ephilayo kunye ne-ion zetsimbi ezinexabiso eliphezulu kwimveliso yangempela (i-A123, i-Yantai XionGong isebenzisa le ndlela), uphando lubonisa ukuba abaqhubi be-lithium iron phosphate. Imiyalelo ye-7 yobukhulu, ukwenzela ukuba i-lithium iron phosphate inepropathi yokuqhuba efana ne-lithium cobalt acid. Ingxelo yaseLebhu Xa 0.

I-1c intlawulo kunye nokukhutshwa, umthamo othile we-165mAh / g ufikeleleke, kunye nokufikelela kwangempela kwe-135-145mAh / g, eyona nto isondele kwi-lithium cobaltate; nangona kunjalo, ingxaki yesantya esicothayo sokuchithwa kwesantya asisekho isisombululo esihle, isisombululo esikhoyo sibalulekile ukuba sibe neenkozo ze-nanochemical LiFePO4, ngaloo ndlela ukunciphisa umgama wokusabalalisa i-ion ze-lithium kwiinkozo, kwaye emva koko, i-doped ukuphucula i-diffusion channel ye-lithium. ions, kwaye le ndlela yokugqibela ayibonakali ijongeka. ngokucacileyo. I-Nano inophando oluninzi, kodwa kunzima ukufaka isicelo kwimveliso yangempela yemizi-mveliso, kwaye yi-A123 kuphela eye yabanga ukuba iyinkosi yeteknoloji ye-nanochemical ye-LifePo4.

Uxinzelelo lokungcangcazela okusezantsi. Ngokubanzi kuphela 0.8-1.

I-3, ukuxinana kwe-vibration ephantsi kunokuthiwa yintsilelo kakhulu ye-lithium iron phosphate. Zonke izinto ezilungileyo ze-lithium iron phosphate zigqiba ukuba azinanzuzo kwiibhetri ezincinci ezifana neebhetri zeselfowuni, ngoko ke ububanzi bokusetyenziswa bulinganiselwe ngomlinganiselo othile. Nangona ixabiso layo liphantsi, ukhuseleko oluhle, ukuzinza okulungileyo, umjikelezo ophezulu, kodwa ukuba ubungakanani bukhulu kakhulu, kuphela ixabiso elincinci le-lithium.

Kodwa le ntsilelo ayiyi kuphuma kwibhetri ye-lithium yamandla. Ngoko ke, i-lithium iron phosphate ibalulekile ekwenzeni iibhetri ze-lithium zamandla. Nangona abantu baye badlula iindlela ezahlukeneyo (ezifana ne-lithium-bit, i-iron bit, kunye ne-phosphoric acid-based doping ukuphucula i-ion kunye ne-electron conductive properties, ngokuphucula ubungakanani bamasuntswana kunye ne-morphology yamasuntswana aphambili okanye okwesibini, ngokongeza i-conductive entsha ye-electron conductivity. , njl.

Ngokubanzi, malunga nebhetri enye (inqaku lelinye kuphela endaweni yebhetri yepakethe, umlinganiselo wokusebenza kobushushu obuphantsi unokuba phezulu kancinane, oku kunxulumene neemeko zokulahla ubushushu), kunye nomthamo kwi-0 ¡ã C uhleli. 60 ~ 70%, - 10 ¡ã C ngama-40 ~ 55%, kunye nama-20 ukuya kuma-40% kwi-20 ¡ã C. Ukusebenza okunjalo kobushushu obuphantsi ngokucacileyo akuhlangabezani neemfuno zobonelelo lwamandla. Abanye abavelisi baye baphucula ukusebenza kobushushu obuphantsi be-lithium iron phosphate ngokuphucula inkqubo yesisombululo se-electrolytic, ukuphucula iresiphi efanelekileyo, ukuphucula ukusebenza kwezinto kunye nokuphucula ukuyila kwebhetri, njl.

, kodwa ayikhange ihlangabezane nemfuneko. Ingxaki yokungaguquguquki kwebhetri. Ubomi bebhetri ye-lithium phosphate ion okwangoku bungaphezu kwamaxesha angama-2,000, kodwa ubomi bebhetri buya kuncitshiswa kakhulu, kunokwenzeka ukuba ngamaxesha angama-500.

Ngenxa yokuba ipakethe yebhetri yenziwe ngenani elikhulu leentambo zebhetri ze-monomer, imeko esebenzayo ingcono kuneqela labantu ukuba baqhube kunye nentambo, nokuba wonke umntu uqhuba okufutshane, ukuba ukuhambelana kwentshukumo yomntu wonke akuphezulu, iqela liphezulu. ayibaleki, iyonke Isantya sicotha ngakumbi kunoyena mdlali ucothayo omnye obalekayo. Ipakethi yebhetri inengqiqo, kuphela xa ibhetri iphezulu, ubomi bunokusondela kwinqanaba lebhetri elilodwa. Ngaphantsi kweemeko ezikhoyo, ngenxa yezizathu ezahlukeneyo, ukuveliswa kokuhambelana kwebhetri akubi, nto leyo echaphazela ukusebenza kunye nobomi bebhetri ngokubanzi, ngoko kukho umqobo othile kwi-vehic yamandla.

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