Cov roj teeb lithium-ion hu ua “rocking Chair-type” roj teeb. Charged ions txav ntawm qhov zoo thiab qhov tsis zoo electrodes kom paub txog kev hloov pauv thiab muab lub zog rau cov khoom siv hluav taws xob sab nraud lossis them los ntawm lub zog sab nraud.

Thaum lub sijhawm them nyiaj tshwj xeeb, qhov hluav taws xob sab nraud yog siv rau ob tug ncej ntawm lub roj teeb, thiab cov lithium ions raug rho tawm los ntawm cov khoom siv hluav taws xob zoo thiab nkag mus rau electrolyte. Nyob rau tib lub sijhawm, cov khoom siv hluav taws xob ntau dhau dhau los ntawm cov khoom zoo tam sim no thiab txav mus rau qhov tsis zoo electrode los ntawm sab nraud Circuit Court; cov lithium ions yog nyob rau hauv cov electrolyte. Nws txav los ntawm qhov zoo electrode mus rau qhov tsis zoo electrode, dhau los ntawm lub diaphragm mus rau qhov tsis zoo electrode; SEI zaj duab xis dhau los ntawm qhov chaw ntawm qhov tsis zoo electrode yog embedded nyob rau hauv graphite txheej txheej txheem ntawm cov electrode tsis zoo thiab ua ke nrog electrons.

Thoob plaws hauv kev ua haujlwm ntawm ions thiab electrons, cov qauv roj teeb uas cuam tshuam rau kev hloov pauv, txawm tias electrochemical lossis lub cev, yuav cuam tshuam rau kev them nyiaj ceev.

Cov kev xav tau ntawm kev them nyiaj ceev rau txhua qhov chaw ntawm lub roj teeb

Hais txog cov roj teeb, yog tias koj xav txhim kho lub zog ua haujlwm, koj yuav tsum ua haujlwm hnyav rau txhua yam ntawm lub roj teeb, suav nrog cov khoom siv hluav taws xob zoo, cov hluav taws xob tsis zoo, cov electrolyte, cov khoom sib cais, thiab cov qauv tsim.

zoo electrode

Qhov tseeb, yuav luag txhua yam khoom siv cathode tuaj yeem siv los ua cov roj teeb ceev ceev. Cov khoom tseem ceeb uas yuav tsum tau lees paub muaj xws li conductivity (txo qis hauv kev tiv thaiv), diffusion (kom paub meej cov tshuaj tiv thaiv kinetics), lub neej (tsis piav qhia), thiab kev nyab xeeb (tsis piav qhia), kev ua haujlwm zoo (qhov tshwj xeeb ntawm thaj chaw yuav tsum tsis txhob dhau. loj los txo cov kev tawm tsam sab nraud thiab pab kev nyab xeeb).

Tau kawg, cov teeb meem yuav daws tau rau txhua yam khoom siv yuav txawv, tab sis peb cov khoom siv cathode tuaj yeem ua tau raws li cov kev cai no los ntawm kev ua kom zoo dua qub, tab sis cov ntaub ntawv sib txawv kuj txawv:

A. Lithium hlau phosphate tej zaum yuav tsom mus rau kev daws teeb meem ntawm conductivity thiab kub tsawg. Nqa tawm cov pa roj carbon txheej, nruab nrab nanoization (nco ntsoov tias nws yog nruab nrab, nws tsis yog ib qho yooj yim logic uas lub finer qhov zoo dua), thiab tsim ion conductors nyob rau saum npoo ntawm cov hais yog cov feem ntau cov tswv yim.

B. Cov khoom siv ternary nws tus kheej muaj cov khoom siv hluav taws xob zoo, tab sis nws cov reactivity siab dhau lawm, yog li cov ntaub ntawv ternary tsis tshua muaj kev ua haujlwm nano-scale (nano-ization tsis yog panacea-zoo li tshuaj tiv thaiv rau kev txhim kho cov khoom ua tau zoo, tshwj xeeb tshaj yog nyob rau hauv cov khoom siv ternary. teb cov roj teeb Muaj qee zaum muaj ntau yam kev siv tshuaj tiv thaiv hauv Suav teb), thiab kev saib xyuas ntau dua yog them nyiaj rau kev nyab xeeb thiab kev tiv thaiv sab nraud (nrog rau electrolyte). Tom qab tag nrho, tam sim no lub neej ntawm ternary cov ntaub ntawv nyob rau hauv kev nyab xeeb, thiab tsis ntev los no lub roj teeb kev nyab xeeb xwm txheej kuj tshwm sim ntau zaus. Muab cov kev xav tau siab dua.

C. Lithium manganate tseem ceeb dua nyob rau hauv cov nqe lus ntawm kev pab cuam lub neej. Kuj tseem muaj ntau lub lithium manganate-raws li cov roj teeb ceev ceev ntawm lub khw.

tsis zoo electrode

Thaum lub roj teeb lithium-ion raug them, lithium tsiv mus rau qhov tsis zoo electrode. Qhov muaj peev xwm ntau dhau los ntawm kev them nyiaj ceev thiab tam sim no loj yuav ua rau qhov tsis zoo electrode muaj peev xwm ua rau tsis zoo. Nyob rau lub sijhawm no, lub siab ntawm qhov tsis zoo electrode kom sai sai txais lithium yuav nce, thiab cov nyiam tsim cov lithium dendrites yuav nce. Yog li ntawd, qhov tsis zoo electrode yuav tsum tsis tsuas yog txaus siab rau lithium diffusion thaum them ceev. Cov kev cai kinetics ntawm lithium ion roj teeb yuav tsum tau daws qhov teeb meem kev nyab xeeb los ntawm kev nce siab ntawm lithium dendrites. Yog li ntawd, qhov teeb meem tseem ceeb ntawm kev them nyiaj ceev ceev yog qhov ntxig ntawm lithium ions hauv qhov tsis zoo electrode.

A. Tam sim no, cov khoom siv tsis zoo electrode nyob rau hauv kev ua lag luam tseem yog graphite (suav txog li 90% ntawm cov khoom lag luam). Qhov laj thawj tseem ceeb yog pheej yig, thiab kev ua tiav kev ua tau zoo thiab lub zog ntom ntom ntawm graphite kuj zoo, nrog qee qhov tsis txaus. . Tau kawg, tseem muaj teeb meem nrog graphite tsis zoo electrode. Qhov saum npoo yog rhiab heev rau cov electrolyte, thiab lithium intercalation cov tshuaj tiv thaiv muaj zog directionality. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum tau ua hauj lwm hnyav los txhim kho cov qauv kev ruaj ntseg ntawm cov graphite nto thiab txhawb cov diffusion ntawm lithium ions ntawm lub substrate. kev taw qhia.

B. Cov ntaub ntawv nyuaj carbon thiab mos cov ntaub ntawv kuj tau pom ntau txoj kev loj hlob nyob rau hauv xyoo tas los no: cov ntaub ntawv nyuaj carbon muaj lithium insertion muaj peev xwm thiab muaj micropores hauv cov ntaub ntawv, yog li cov tshuaj tiv thaiv kinetics zoo; thiab cov ntaub ntawv mos carbon muaj kev sib raug zoo nrog electrolyte, MCMB Cov ntaub ntawv kuj yog cov neeg sawv cev, tab sis cov ntaub ntawv nyuaj thiab cov pa roj carbon monoxide feem ntau tsis tshua muaj txiaj ntsig thiab tus nqi siab (thiab xav tias graphite yog tib yam pheej yig, kuv ntshai tias nws tsis yog. cia siab los ntawm ib qho kev pom ntawm kev lag luam), yog li kev noj tam sim no tsawg dua graphite, thiab siv ntau dua hauv qee qhov tshwj xeeb ntawm lub roj teeb.

C. Yuav ua li cas txog lithium titanate? Yuav kom muab tso rau nws luv luv: qhov zoo ntawm lithium titanate muaj hwj chim ceev, kev ruaj ntseg, thiab cuab disadvantages. Lub zog ceev yog tsawg heev, thiab tus nqi siab thaum xam los ntawm Wh. Yog li ntawd, qhov kev xav ntawm lithium titanate roj teeb yog cov cuab yeej siv tau zoo nrog rau qhov zoo ntawm lub sijhawm tshwj xeeb, tab sis nws tsis haum rau ntau lub sijhawm uas yuav tsum tau them nqi siab thiab caij nkoj.

D. Silicon anode cov ntaub ntawv yog ib qho tseem ceeb ntawm txoj kev loj hlob, thiab Panasonic tus tshiab 18650 roj teeb tau pib ua lag luam txheej txheem ntawm cov ntaub ntawv no. Txawm li cas los xij, yuav ua li cas kom ua tiav qhov sib npaug ntawm kev ua tiav ntawm nanometer kev ua tau zoo thiab cov kev xav tau ntawm micron-theem ntawm cov khoom siv roj teeb hauv kev lag luam tseem yog ib txoj haujlwm nyuaj dua.

Diaphragm

Hais txog lub hwj chim-hom roj teeb, kev ua haujlwm siab tam sim no tsim cov kev xav tau siab dua ntawm lawv txoj kev nyab xeeb thiab kev ua neej. Diaphragm txheej tshuab tsis tuaj yeem hla. Ceramic coated diaphragms tau raug thawb tawm sai sai vim tias lawv muaj kev nyab xeeb siab thiab muaj peev xwm haus cov impurities hauv electrolyte. Tshwj xeeb, cov txiaj ntsig ntawm kev txhim kho kev nyab xeeb ntawm ternary roj teeb yog qhov tseem ceeb.

Qhov tseem ceeb tshaj plaws tam sim no siv rau cov diaphragms ceramic yog los npog cov alumina hais rau ntawm qhov chaw ntawm cov diaphragms. Ib txoj hauv kev tshiab yog los npog cov khoom electrolyte fibers ntawm lub diaphragm. Cov diaphragms zoo li no muaj kev tiv thaiv sab hauv, thiab cov cuab yeej txhawb nqa ntawm fiber ntau diaphragms zoo dua. Zoo heev, thiab nws muaj qhov qis dua los thaiv cov diaphragm pores thaum ua haujlwm.

Tom qab txheej, lub diaphragm muaj kev ruaj ntseg zoo. Txawm hais tias qhov kub thiab txias, nws tsis yooj yim rau shrink thiab deform thiab ua rau luv luv Circuit Court. Jiangsu Qingtao Energy Co., Ltd. txhawb nqa kev txhawb nqa ntawm Nan Cewen tshawb fawb pab pawg ntawm Tsev Kawm Ntawv ntawm Cov Khoom Siv thiab Khoom Siv ntawm Tsinghua University muaj qee tus neeg sawv cev hauv qhov no. Ua haujlwm, lub diaphragm yog qhia hauv daim duab hauv qab no.

Kev xuas hluav taws xob

Cov electrolyte muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm cov roj teeb lithium-ion ceev ceev. Txhawm rau kom muaj kev ruaj ntseg thiab kev nyab xeeb ntawm lub roj teeb nyob rau hauv kev them nyiaj ceev thiab siab tam sim no, cov electrolyte yuav tsum ua raws li cov yam ntxwv hauv qab no: A) tsis tuaj yeem decomposed, B) siab conductivity, thiab C) inert rau cov khoom zoo thiab tsis zoo. React los yog yaj.

Yog tias koj xav ua kom tau raws li cov cai no, tus yuam sij yog siv cov khoom siv ntxiv thiab cov khoom siv electrolytes. Piv txwv li, kev nyab xeeb ntawm ternary fast-them roj teeb muaj kev cuam tshuam zoo heev los ntawm nws, thiab nws yog ib qho tsim nyog yuav tsum tau ntxiv ntau yam kev tiv thaiv-siab kub, nplaim taws-retardant, thiab anti-overcharge additives rau lawv los txhim kho nws txoj kev nyab xeeb rau qee yam. Cov teeb meem qub thiab nyuaj ntawm lithium titanate roj teeb, kub-kub flatulence, kuj yuav tsum tau txhim kho los ntawm high-temperature functional electrolyte.

Roj teeb qauv tsim

Ib qho kev ua kom zoo tshaj plaws yog cov txheej txheem VS winding. Cov electrodes ntawm cov roj teeb stacked yog sib npaug rau cov kev sib raug zoo ntawm kev sib txuas, thiab hom winding yog sib npaug rau kev sib txuas ua ke. Yog li ntawd, lub internal kuj ntawm lub qub yog ntau me me thiab nws yog ntau haum rau lub hwj chim hom. sijhawm.

Tsis tas li ntawd, kev siv zog tuaj yeem ua rau tus naj npawb ntawm cov tabs los daws cov teeb meem ntawm kev ua haujlwm sab hauv thiab cov cua sov dissipation. Tsis tas li ntawd, siv cov khoom siv hluav taws xob hluav taws xob siab, siv cov khoom siv hluav taws xob ntau dua, thiab txheej txheej nyias nyias electrodes kuj yog cov tswv yim uas tuaj yeem xav txog.

Nyob rau hauv luv luv, cov yam uas cuam tshuam rau cov nqi zog nyob rau hauv lub roj teeb thiab tus nqi ntawm insertion ntawm electrode qhov yuav cuam tshuam lub ceev ceev them peev xwm ntawm lithium-ion roj teeb.

Txheej txheem cej luam ntawm fast charging technology txoj kev rau mainstream manufacturers

Ningde era

Hais txog qhov zoo electrode, CATL tau tsim “super electronic network” thev naus laus zis, uas ua rau lithium hlau phosphate muaj hluav taws xob zoo heev; Nyob rau ntawm qhov tsis zoo electrode graphite nto, “ceev ion nplhaib” thev naus laus zis yog siv los hloov cov graphite, thiab hloov graphite yuav siv sij hawm rau hauv tus account ob qho tib si super ceev them thiab siab nrog cov yam ntxwv ntawm lub zog ceev, qhov tsis zoo electrode tsis muaj ntau dhau los ntawm- cov khoom thaum lub sij hawm them ceev, kom nws muaj 4-5C ceev them lub peev xwm, paub txog 10-15 feeb ceev them thiab them, thiab tuaj yeem ua kom lub zog ntom ntom ntawm cov txheej txheem siab tshaj 70wh / kg, ua tiav 10,000 Lub neej voj voog.

Nyob rau hauv cov nqe lus ntawm kev tswj thermal, nws lub thermal tswj system tau lees paub “kev noj qab haus huv lub sijhawm” ntawm cov tshuaj ruaj khov ntawm qhov sib txawv ntawm qhov kub thiab txias SOCs, uas ua rau kev ua haujlwm kub ntawm lithium-ion roj teeb.

Waterma

Waterma tsis zoo li yav dhau los, cia peb tham txog thev naus laus zis. Waterma siv lithium hlau phosphate nrog me me particle loj. Tam sim no, cov lithium hlau phosphate feem ntau nyob rau hauv kev ua lag luam muaj qhov loj me ntawm 300 thiab 600 nm, thaum Waterma tsuas yog siv 100 mus rau 300 nm lithium hlau phosphate, yog li lithium ions yuav muaj qhov ceev ntawm kev tsiv teb tsaws, qhov loj dua tam sim no. raug them thiab tso tawm. Rau cov tshuab uas tsis yog cov roj teeb, ntxiv dag zog rau kev tsim cov txheej txheem thermal tswj thiab kev ruaj ntseg system.

Lub Hwj Chim Me Me

Thaum ntxov, Weihong Fais Fab xaiv lithium titanate + ntxeem tau cov pa roj carbon monoxide nrog cov qauv spinel uas tuaj yeem tiv taus kev them nyiaj ceev thiab siab tam sim no raws li cov khoom tsis zoo electrode; Txhawm rau tiv thaiv kev hem thawj ntawm lub zog hluav taws xob tam sim no rau lub roj teeb kev nyab xeeb thaum them nyiaj ceev, Weihong Lub Hwj Huam Sib Txuas Cov Hluav Taws Xob Tsis Siv Hluav Taws Xob, cov porosity thiab high-permeability diaphragm technology thiab STL ntse thermal tswj kua tshuab, nws tuaj yeem ua kom muaj kev nyab xeeb ntawm lub roj teeb. thaum lub roj teeb tau them sai sai.

Xyoo 2017, nws tau tshaj tawm cov tiam tshiab ntawm cov roj teeb uas muaj zog ceev, siv lub peev xwm siab thiab lub zog loj lithium manganate cathode cov ntaub ntawv, nrog tib lub zog ceev ntawm 170wh / kg, thiab ua tiav 15-feeb them ceev. Lub hom phiaj yog coj mus rau hauv tus account lub neej thiab kev nyab xeeb teeb meem.

Zhuhai Yinlong

Lithium titanate anode paub txog nws qhov kev khiav hauj lwm kub ntau thiab tus nqi them nqi loj. Tsis muaj cov ntaub ntawv meej meej ntawm cov txheej txheem tshwj xeeb. Tham nrog cov neeg ua haujlwm ntawm lub rooj nthuav qhia, nws tau hais tias nws cov nqi nrawm tuaj yeem ua tiav 10C thiab lub neej ntev yog 20,000 zaug.

Lub neej yav tom ntej ntawm kev them nyiaj ceev ceev

Txawm hais tias lub tshuab hluav taws xob ceev ceev ntawm lub tsheb hluav taws xob yog qhov kev taw qhia keeb kwm lossis qhov tshwm sim luv luv, qhov tseeb, muaj kev xav sib txawv tam sim no, thiab tsis muaj qhov xaus. Raws li lwm txoj hauv kev los daws qhov kev ntxhov siab me me, nws raug txiav txim siab ntawm tib lub platform nrog roj teeb lub zog ceev thiab tag nrho cov nqi tsheb.

Zog ceev thiab ceev ceev xwb kev ua tau zoo, nyob rau hauv tib lub roj teeb, yuav hais tias yuav tsum ob incompatible qhia thiab yuav tsis tau tiav nyob rau tib lub sij hawm. Kev nrhiav roj teeb lub zog ceev yog tam sim no lub ntsiab. Thaum lub zog ceev yog siab txaus thiab lub roj teeb peev xwm ntawm ib lub tsheb yog loj txaus los mus tiv thaiv qhov thiaj li hu ua “ntau kev ntxhov siab vim”, qhov kev thov rau roj teeb tus nqi them kev kawm yuav raug txo kom tsawg; Nyob rau tib lub sijhawm, yog tias lub roj teeb lub zog loj, yog tias lub roj teeb nqi ib kilowatt-teev tsis txaus, nws puas tsim nyog? Ding Kemao qhov kev yuav hluav taws xob txaus rau “tsis muaj kev ntxhov siab” xav kom cov neeg siv khoom xaiv. Yog tias koj xav txog nws, them sai sai muaj nqis. Lwm qhov kev xav yog tus nqi them ceev ceev, uas yog ib feem ntawm tus nqi ntawm tag nrho cov zej zog los txhawb kev siv hluav taws xob.

Seb ceev them technology yuav tau nce nyob rau hauv ib tug loj scale, lub zog ceev thiab ceev ceev them technology uas muaj ceev ceev, thiab tus ob technologies uas txiav nqi down, tej zaum ua si ib decisive luag hauj lwm nyob rau hauv nws yav tom ntej.