Tam sim no, cov roj teeb lithium ion tau ua lub luag haujlwm tseem ceeb hauv tib neeg lub neej, tab sis tseem muaj qee qhov teeb meem hauv lithium roj teeb technology. Lub ntsiab yog vim li cas yog tias cov electrolyte siv nyob rau hauv lithium roj teeb yog lithium hexafluorophosphate, uas yog rhiab heev rau ya raws thiab muaj kub kub ua hauj lwm. Instability thiab decomposition khoom yog corrosive rau cov khoom siv electrode, ua rau tsis zoo kev nyab xeeb ntawm lithium roj teeb. Nyob rau tib lub sijhawm, LiPF6 kuj muaj teeb meem xws li kev solubility tsis zoo thiab tsis tshua muaj hluav taws xob nyob rau hauv qhov kub thiab txias, uas tsis tuaj yeem ua tau raws li kev siv cov roj teeb lithium. Yog li ntawd, nws yog ib qho tseem ceeb heev los tsim tshiab electrolyte lithium ntsev nrog kev ua tau zoo heev.
Txog tam sim no, cov koom haum tshawb fawb tau tsim ntau yam tshiab electrolyte lithium ntsev, ntau tus neeg sawv cev yog lithium tetrafluoroborate thiab lithium bis-oxalate borate. Ntawm lawv, lithium bis-oxalate borate tsis yooj yim rau decompose ntawm qhov kub thiab txias, insensitive rau ya raws, yooj yim synthesis txheej txheem, tsis muaj qhov zoo ntawm cov pa phem, electrochemical stability, dav qhov rais, thiab lub peev xwm los tsim ib tug zoo SEI zaj duab xis ntawm lub nto ntawm qhov tsis zoo electrode, tab sis tsis tshua muaj solubility ntawm cov electrolyte nyob rau hauv linear carbonate solvents ua rau nws tsis tshua muaj conductivity, tshwj xeeb tshaj yog nws tsis tshua muaj kub kev kawm. Tom qab kev tshawb fawb, nws tau pom tias lithium tetrafluoroborate muaj cov solubility loj hauv cov kuab tshuaj carbonate vim nws qhov me me molecular, uas tuaj yeem txhim kho qhov kub thiab txias ntawm lithium roj teeb, tab sis nws tsis tuaj yeem tsim SEI zaj duab xis rau ntawm qhov tsis zoo electrode. . Cov electrolyte lithium ntsev lithium difluorooxalate borate, raws li nws cov yam ntxwv ntawm cov yam ntxwv, lithium difluorooxalate borate combines qhov zoo ntawm lithium tetrafluoroborate thiab lithium bis-oxalate borate nyob rau hauv cov qauv thiab kev ua tau zoo, tsis tsuas yog nyob rau hauv linear carbonate solvents. Nyob rau tib lub sijhawm, nws tuaj yeem txo cov viscosity ntawm cov electrolyte thiab nce cov conductivity, yog li ntxiv kev txhim kho qhov kub thiab txias kev ua haujlwm ntawm lithium ion roj teeb. Lithium difluorooxalate borate kuj tuaj yeem tsim cov txheej txheem ntawm cov khoom siv rau ntawm qhov chaw tsis zoo electrode xws li lithium bisoxalate borate. Ib zaj duab xis zoo SEI loj dua.
Vinyl sulfate, lwm yam uas tsis yog-lithium ntsev additive, kuj yog ib tug SEI zaj duab xis-tsim additive, uas muaj peev xwm inhibit qhov txo qis ntawm thawj lub peev xwm ntawm lub roj teeb, ua rau kom muaj peev xwm pib tawm, txo cov expansion ntawm lub roj teeb tom qab muab tso rau ntawm qhov kub thiab txias. , thiab txhim kho cov nqi-tso kev ua tau zoo ntawm lub roj teeb, uas yog, tus naj npawb ntawm cov voj voog. . Li no ncua lub siab endurance ntawm lub roj teeb thiab prolonging lub neej kev pab cuam ntawm lub roj teeb. Yog li ntawd, txoj kev loj hlob zeem muag ntawm electrolyte additives tau txais ntau thiab ntau xim, thiab kev lag luam xav tau nce.
Raws li "Industrial Structure Adjustment Guidance Catalog (2019 Edition)," electrolyte additives ntawm qhov project no yog nyob rau hauv txoj kab nrog rau thawj feem ntawm kev txhawb zog qeb, Tshooj 5 (lub zog tshiab), taw tes 16 "txoj kev loj hlob thiab kev siv ntawm mobile tshiab zog. technology", Tshooj 11 (Petrochemical kev lag luam) taw tes 12 "hloov, dej-raws li adhesives thiab tshiab kub yaj adhesives, environmentally friendly water absorbents, water treatment agents, molecular sieve solid mercury, mercury-free and other new efficiency and environmentally friendly catalysts. thiab additives, nanomaterials, Kev loj hlob thiab zus tau tej cov ntaub ntawv membrane functional, ultra-huv thiab high-purity reagents, photoresists, hluav taws xob gases, high-performance kua siv lead ua cov ntaub ntawv thiab lwm yam tshiab zoo tshuaj; Raws li kev tshuaj xyuas thiab kev tshuaj xyuas ntawm cov ntaub ntawv kev lag luam hauv teb chaws thiab hauv cheeb tsam xws li "Daim Ntawv Ceeb Toom Txog Cov Ntawv Teev Npe Tsis Zoo rau Kev Txhim Kho Txoj Kev Siv Nyiaj Txiag (rau Kev Txiav Txim Siab)" (Changjiang Office Document No. 89), nws tau txiav txim siab tias qhov project no tsis yog. ib qho kev txwv lossis txwv txoj kev loj hlob.
Lub zog siv thaum lub phiaj xwm ncav cuag lub peev xwm tsim muaj xws li hluav taws xob, chav dej thiab dej. Tam sim no, qhov project tau txais kev lag luam thev naus laus zis ntau lawm thiab khoom siv, thiab siv ntau yam kev txuag hluav taws xob. Tom qab muab tso rau hauv kev siv, tag nrho cov ntsuas kev siv hluav taws xob tau mus txog qib siab hauv tib txoj kev lag luam hauv Suav teb, thiab tau ua raws li lub teb chaws thiab kev lag luam txuag hluav taws xob tsim tshwj xeeb, txuag hluav taws xob saib xyuas cov qauv thiab cov khoom siv. Kev lag luam kev lag luam tus qauv; tsuav yog qhov project siv ntau yam kev ntsuas kev siv hluav taws xob, cov khoom siv hluav taws xob siv hluav taws xob thiab ntsuas kev txuag hluav taws xob tau npaj tseg hauv daim ntawv tshaj tawm no thaum lub sij hawm tsim kho thiab tsim khoom, qhov project no muaj peev xwm ua tau los ntawm kev xav ntawm kev siv hluav taws xob zoo. Raws li qhov no, nws tau txiav txim siab tias qhov project tsis koom nrog kev siv cov peev txheej hauv online.
Cov qauv tsim ntawm qhov project yog: lithium difluorooxalate borate 200t / a, ntawm 200t / a lithium tetrafluoroborate yog siv los ua cov khoom siv raw rau lithium difluorooxalate borate cov khoom, tsis muaj kev ua haujlwm tom qab, tab sis nws kuj tuaj yeem tsim ua cov khoom tiav. cais raws li kev lag luam xav tau. Vinyl sulfate yog 1000t / a. Saib Table 1.1-1

Table 1.1-1 Daim ntawv teev cov khoom daws teeb meem