Nyob rau hauv lub nthwv dej ntawm lub zog kiv puag ncig, roj teeb technology, raws li lub hauv paus ntsiab lus ntawm lub zog cia thiab hloov dua siab tshiab, tab tom mus rau unprecedented transformation. Los ntawm cov roj teeb qhuav hauv lub teeb nyem mus rau lithium roj teeb hauv lub tsheb hluav taws xob, thiab tom qab ntawd mus rau cov roj hlwb hauv hydrogen- lub tsheb uas siv hluav taws xob, peb txoj kev siv tshuab tau sib tw hnyav heev ntawm lub zog ceev, nqi, kev phooj ywg ib puag ncig, thiab lwm yam. Txawm li cas los xij, qhov kev sib tw no tsis yog ib qho yooj yim ntawm "kev muaj sia nyob ntawm qhov fittest" tab sis yog qhov tshwm sim ntawm qhov sib sib zog nqus sib txuas ntawm cov yam ntxwv sib txawv thiab kev xav tau ntawm kev lag luam.
I. Cov Ntsiab Cai Txuj Ci: Peb lub ntsiab lus ntawm cov tshuaj lom neeg
Cov roj teeb qhuav, raws li cov khoom siv hluav taws xob qub tshaj plaws, yog qhov tseem ceeb "cov khoom siv hluav taws xob pov tseg pov tseg." Noj cov zinc zoo-manganese qhuav roj teeb ua piv txwv, zinc lub tog raj kheej ua haujlwm tsis zoo electrode thiab yog oxidized, thaum manganese dioxide ua raws li cov electrode zoo thiab txo. Cov ammonium ions hauv cov tshuaj electrolyte tau koom nrog hauv cov tshuaj tiv thaiv, thaum kawg hloov cov tshuaj siv hluav taws xob rau hauv hluav taws xob hluav taws xob. Cov tshuaj tiv thaiv tsis tuaj yeem thim rov qab no txiav txim siab txog qhov txwv ntawm lub roj teeb qhuav lub neej ntev -ib zaug cov khoom siv tas mus li, lub roj teeb yuav siv tsis tau.
Lithium roj teeb, ntawm qhov tod tes, ua tiav cov nqi them - tawm mus los ntawm kev tsiv teb tsaws ntawm lithium ions ntawm qhov zoo thiab tsis zoo electrodes. Siv ternary lithium roj teeb ua piv txwv, thaum them nyiaj, lithium ions yog deintercalated los ntawm qhov zoo electrode (nickel{2}}cobalt-}manganese oxide), dhau los ntawm electrolyte, thiab intercalated rau hauv graphite tsis zoo electrode. Thaum tso tawm, cov txheej txheem thim rov qab. Qhov "pob zeb- lub rooj zaum" no ua rau cov roj teeb lithium thim rov qab cov khoom siv hluav taws xob nrog cov theoretical voj voog nyob mus txog ntau txhiab zaus.
Roj hlwbtag nrho overturn lub kaw qauv ntawm cov tsoos roj teeb. Siv cov khoom siv hluav taws xob hloov pauv hluav taws xob ua piv txwv, hydrogen yog decomposed rau hauv protons thiab electrons ntawm anode. Cov electrons ntws los ntawm ib qho hluav taws xob sab nraud los tsim cov hluav taws xob tam sim no, thaum cov protons dhau los ntawm electrolyte daim nyias nyias thiab ua ke nrog oxygen ntawm cathode los ua dej. Qhov "sab nraud pub, tsim hluav taws xob sab hauv" hom no ua rau cov roj hlwb hloov hluav taws xob ntau dua li lub zog cia khoom siv. Raws li txoj cai, tsuav yog hydrogen txuas ntxiv mus, lawv tuaj yeem tsim hluav taws xob tsis tu ncua.
II. Performance Showdown: Daim duab peb sab Game of Energy Density, Nqi, thiab Lifespan
Zog ceevyog lub cim qhia tseem ceeb rau kev ntsuas roj teeb kev ua haujlwm. Dry batteries generally have an energy density below 200 Wh/kg, making it difficult for them to support high-power-consumption devices. Cov roj teeb lithium tau dhau 300 Wh / kg los ntawm cov khoom siv tshiab (xws li silicon-carbon anodes thiab siab-nickel cathodes), ua qhov kev xaiv tseem ceeb rau tsheb fais fab. Roj hlwb, nrog lub zog ceev ntawm ntau dua 400 Wh / kg, tuav txoj haujlwm tseem ceeb hauv kev thauj mus los hnyav. Hydrogen- cov tsheb thauj khoom muaj peev xwm taug kev ntau dua 1,000 mais ntawm ib qho kev refueling, ua kom pom lawv qhov txiaj ntsig zoo hauv cheeb tsam no.
Nqiyog ib qho tseem ceeb txwv tsis pub muaj kev tshaj tawm ntawm cov thev naus laus zis. Cov roj teeb qhuav, nrog lawv cov txheej txheem tsim khoom, tuaj yeem raug nqi tsawg li 0.5 yuan ib chav tsev. Txawm li cas los xij, lawv qhov xwm txheej pov tseg tau ua rau cov nqi hluav taws xob siab. Los ntawm loj- teev ntau lawm, lithium roj teeb tau txo lawv cov nqi ib kilowatt- teev kom qis dua 0.6 yuan. Txawm li cas los xij, tus nqi hloov pauv ntawm cov khoom siv tseem ceeb xws li lithium thiab cobalt tseem ua rau muaj kev pheej hmoo. Roj hlwb ntsib teeb meem ntawm kev ua "noble" technologies, nrog platinum catalysts accounting rau 40% ntawm tus nqi ntawm cov roj cell pawg. Qhov no ua rau hydrogen{11}} lub zog tsheb ob mus rau peb npaug kim dua li lawv cov roj av - powered counterparts.
Nyob rau hauv cov nqe lus ntawmlub neej, cov tshuaj degradation ntawm cov roj teeb qhuav yog irreversible, thiab lawv feem ntau dhau los lawm tom qab ntau pua siv. Cov roj teeb lithium tuaj yeem muaj lub neej voj voog ntau dua 2,000 zaug, tab sis qhov kub thiab txias, overcharging, thiab lwm yam kev ua haujlwm tuaj yeem ua kom muaj peev xwm degradation. Txawm hais tias cov khoom siv hluav taws xob hauv cov roj hlwb tsis koom nrog cov tshuaj tiv thaiv, cov teeb meem xws li degradation ntawm proton exchange membrane thiab catalyst lom tseem txwv lawv lub neej rau 5,000-8,000 teev, sib npaug rau ib feem peb ntawm cov roj av xyaw.
III. Daim Ntawv Thov Scenarios: Cov yam ntxwv thev naus laus zis txiav txim siab ua lag luam ciam teb
Cov roj teeb qhuavnyob twj ywm indispensable nyob rau hauv tsawg- hwj chim-siv thiab portable scenarios. Cov khoom siv xws li cov chaw taws teeb tswj, cov khoom ua si, thiab teeb pom kev zoo muaj qhov xav tau ntawm lub zog ceev tab sis xav tau qhov yooj yim ntawm kev npaj siv yam tsis muaj kev saib xyuas. Cov ntaub ntawv qhia tau hais tias lub ntiaj teb qhuav roj teeb lag luam tseem mus txog $ 12 nphom hauv 2024, nrog cov roj teeb alkaline suav txog ntau dua 60% ntawm kev lag luam. Ua tsaug rau lawv qhov tsis tu ncua 1.5V qhov hluav taws xob thiab tsib- xyoo khaws cia, lawv tuav txoj haujlwm ruaj khov hauv chaw xa hluav taws xob thaum muaj xwm txheej ceev.
Lithium roj teebtau tswj hwm cov neeg siv khoom siv hluav taws xob thiab lub teeb -cov haujlwm thauj mus los. Cov khoom siv xws li smartphones thiab laptops muaj ob qhov kev xav tau rau lub zog ceev thiab lub voj voog lub neej, ua rau cov roj teeb lithium nkaus xwb. Hauv kev lag luam tsheb hluav taws xob, cov roj teeb lithium tau tsim kom muaj txiaj ntsig zoo nrog 95% kev lag luam. Lub 21700 roj teeb pob hauv Tesla Model 3 muaj lub zog ceev ntawm 260 Wh / kg thiab txhawb nqa NEDC ntau ntawm 605 mais. Tsis tas li ntawd, cov roj teeb lithium tau nkag mus rau hauv lub zog cia kev lag luam sai, suav txog ntau dua 90% ntawm lub ntiaj teb electrochemical zog cia kev teeb tsa hauv 2024 thiab dhau los ua ib qho kev txhawb nqa tseem ceeb rau kev sib koom ua ke ntawm lub zog tauj dua tshiab rau hauv daim phiaj.
Roj hlwbqhia tau tias muaj peev xwm nyob rau hauv thaj tsam hnyav - lub luag haujlwm thauj mus los thiab kev tsim hluav taws xob nyob ruaj khov. Hydrogen- cov tsheb thauj khoom muaj peev xwm tuaj yeem rov qab tau tsuas yog 3-5 feeb thiab muaj ntau tshaj li 1,000 mais, hais txog "kev ntxhov siab ntau" cuam tshuam nrog lithium roj teeb. Toyota's Mirai roj cell tsheb tau ua lag luam hauv California, Nyiv, thiab lwm thaj chaw, suav nrog ntau tshaj 100 lab mais ntawm kev tsav tsheb. Hauv kev tsim hluav taws xob nyob ruaj ruaj, cov yam ntxwv pib nres ceev ceev ntawm cov roj hlwb ua rau lawv nyiam lub zog thaub qab rau cov chaw tseem ceeb xws li cov chaw zov me nyuam cov ntaub ntawv thiab tsev kho mob. Bloom Energy cov khoom siv hluav taws xob oxide roj tau muab lub zog ruaj khov rau ntau dua 500 lub tuam txhab thoob ntiaj teb.
IV. Environmental Paradox: Tus nqi ib puag ncig tom qab huv zog
Cov roj teeb qhuavua rau muaj teeb meem loj ib puag ncig. Cov roj teeb uas muaj mercury thiab cadmium yog qhov nyuaj rau degrade nyob rau hauv ib puag ncig ntuj, nrog ib lub pob ntawm tes roj teeb uas muaj peev xwm ua paug 600 tons ntawm dej. Txawm hais tias lub teb chaws tau qhia txog kev txwv mercury, ntau dua 3 billion hnyav- hlau- muaj roj teeb tseem nkag mus rau ib puag ncig thoob ntiaj teb hauv xyoo 2024, nrog tus nqi rov ua dua tsawg dua 20%.
Ib puag ncig kev tsis sib haum xeeb nyob ib puag nciglithium roj teebchaw rau kev tsim khoom thiab rov ua dua tshiab. Lithium mining siv cov dej ntau, nrog rau kev tsim ib tuj ntawm lithium carbonate yuav tsum tau evaporation ntawm 2,000 tons ntawm brine, ua rau ecological degradation nyob ib ncig ntawm Salar de Atacama hauv Chile. Hais txog kev rov ua dua tshiab, txawm hais tias lub cev disassembly thiab hydrometallurgical cov txheej txheem tau ua tiav cov hlau rov qab ntawm ntau dua 95%, lub ntiaj teb rov ua dua tus nqi ntawm lithium roj teeb tseem qis dua 30% hauv xyoo 2024. Muaj ntau cov roj teeb siv tau ntws mus rau hauv cov channel tsis raug, ua rau muaj kev pheej hmoo ntawm cov pa phem thib ob.
Roj hlwbmuaj ob qho tib si ib puag ncig zoo thiab kev sib tw. Cov khoom combustion ntawm hydrogen yog dej xwb, tab sis tam sim no, 96% ntawm hydrogen yog tsim los ntawm fossil roj hloov, nrog rau txhua kilogram ntawm grey hydrogen tsim 10 kilograms ntawm carbon dioxide emissions. Yog tias siv cov dej electrolytic (ntsuab hydrogen) siv, nws yuav tsum tau siv hluav taws xob 48 kWh, thiab nws cov pa roj carbon emissions ntawm lub neej nyob ntawm qhov sib koom ntawm lub zog tauj dua tshiab. Tsis tas li ntawd, kev siv thev naus laus zis rau platinum catalysts hauv cov roj hlwb tseem tsis paub qab hau, thiab ua tiav lub voj kaw rau cov hlau muaj txiaj ntsig tseem yog qhov teeb meem tsis tau daws.
V. Cov Kev Pom Zoo Yav Tom Ntej: Kev Sib Koom Tes thiab Kev Tsim Kho Scenario
Peb lub roj teeb thev naus laus zis tsis tau koom nrog xoom- suav nrog kev ua si tab sis nthuav tawm cov qauv ntawm "kev sib koom ua ke ntxiv." Hauv cov khoom siv hluav taws xob siv hluav taws xob, cov roj teeb lithium yuav txuas ntxiv ua lag luam, tab sis tom ntej no -thev naus laus zis xws li cov khoom siv- lub xeev cov roj teeb thiab lithium- cov roj teeb sulfur tuaj yeem tawg los ntawm 500 Wh / kg lub zog ntom ntom ntawm lub raj mis. Hauv qhov hnyav - lub luag haujlwm thauj mus los, "hluav taws xob- hluav taws xob hybrid" system sib txuas cov roj hlwb thiab cov roj teeb lithium tau tshwm sim. Kev sib koom tes ntawm Toyota thiab Kenworth tau qhia tias kev siv roj hlwb rau ntev -kev mus los deb thiab lithium roj teeb rau kev tsav tsheb hauv nroog tuaj yeem txo tag nrho lub zog siv hydrogen- cov tsheb thauj khoom los ntawm 15%. Nyob rau hauv qhov chaw ruaj khov ntawm lub zog cia, qhov ua tiav rau cov roj teeb qhuav{14}}sodium{15}}ion roj teeb- tau nce sai. Nrog rau tus nqi 30% qis dua li cov roj teeb lithium thiab cov khoom siv raw khoom ntau, lawv xav tias yuav ntes 20% ntawm lub ntiaj teb lub zog cia kev lag luam los ntawm 2030.
Cov kev taw qhia ntawm technological evolution yog ib txwm txhais los ntawm kev ua lag luam xav tau. Thaum cov roj teeb lithium mus txog lawv qhov kev txwv theoretical nyob rau hauv cov nqe lus ntawm lub zog ceev, qhov infinite ntau qhov zoo ntawm cov roj hlwb yuav ua kom muaj zog. Thaum tus nqi ntawm cov roj hlwb poob mus rau qib ntawm lithium roj teeb, lawv qhov xoom -emission yam ntxwv yuav ua rau muaj kev hloov pauv hauv kev thauj mus los. Lub caij no, cov roj teeb qhuav tuaj yeem pom lub neej tshiab hauv thaj chaw tshiab xws li Is Taws Nem ntawm Yam (IoT) cov cuab yeej siv thiab siv thev naus laus zis los ntawm cov thev naus laus zis hloov pauv thiab cov khoom siv me me.
Hauv no marathon ntawm lub zog thev naus laus zis, tsis muaj "cov vaj ntxwv nyob mus ib txhis," tsuas yog cov neeg tsim kho tshiab niaj hnub hloov mus rau qhov xwm txheej- raws li qhov xav tau. Kev sib tw ntawm cov roj teeb lithium, roj teeb qhuav, thiab roj hlwb yog qhov tseem ceeb, keeb kwm ntawm tib neeg txoj kev tshawb nrhiav ntawm thaj tsam ntawm lub zog cia thiab hloov dua siab tshiab. Nyob rau hauv lub neej yav tom ntej, nrog tus ntoo khaub lig- kev qhuab qhia kev koom ua ke ntawm cov ntaub ntawv science, electrochemistry, artificial txawj ntse, thiab lwm yam kev qhuab qhia, roj teeb technology yuav ua txhaum los ntawm cov uas twb muaj lawm paradigms thiab muab huv si, ntau npaum, thiab sustainable kev daws teeb meem rau lub ntiaj teb no lub zog hloov.
