Lithium-ion battery te hi eng ang chiah nge an nih?
Lithium-ION Battery hmanrua te hi a capacity leh electromotive force a ni.
Charge-discharge reaction of lithium-ion battery te hian positive leh negative electrode te active materials chauh lithium-ion intercalation/deintercalation reaction an tawk a, electrolyte leh thil dang te chu an ei lo thung. Chuvangin, positive leh negative electrode materials te hian lithium ion te chu reversibly intercalate/deinteratercalate in battery a circuit voltage a hriat theih dan leh lithium ions intercalating/deinintercalating a awm zat hian active material capacity a tichiang a ni. Global lithium-ion battery siamtu leh lithium-ion battery supplier tam tak chuan heng material characteristics te hi an rinchhan a, chu chuan mass production nghet tak leh product performance mumal tak a nei thei a ni.
Negative electrode tan chuan reaction chu equation (1.2) angin a thleng thin. Carbon mole khatah (12g), lithium ion tam ber 1/6 mol chu intercalated theih a ni. Chuvangin, carbon negative electrode material-a theoretical specific capacity chu .
1/6(Mol)×96485(Faraday Constant,C/Mol)/12(g){{4}C/G=372(Ma·H/G) (1.5)
Nitin hmannaah, adsorption avanga lithium hloh leh solid electrolyte interphase (SEI) film siam dan ngaihtuah chuan, carbon materials-a specific capacity tihhlawhtlin theih tak tak chu 300–345 ma·h/g a ni. Leading Lithium-ion Battery Pack supplier te hian optimized graphite formulation leh coating process dik tak hmangin he level hi an thleng thei a ni.
Positive electrode material atan chuan a capacity chu lithium ion lakchhuah/inser theih zat a zirin a innghat a ni. LICOO2 hi entirnan la ila, lithium ion mol 1 thleng LICOO2 mole khatah hian reaction-ah hian a tel thei a ni. Chuvangin, LICOO2 hian theoretical specific capacity a nei a (relative molecular mass 97.86) chu .
1(Mol)×96485(C/MOL)/97.86(g){{3}C/G{4}}(Ma·H/G) (1.6) (1.6)
A taka hman chuan LICOO2 thila crystal stability vawng reng tur chuan a tlangpuiin lithium ion 30%–60% chauhvin reaction-ah hian an tel thin. Chuvangin, LICOO2 material-in a theihna bik (actual specific capacity) chu 137–164 ma·h/g a ni. Major lithium-ion Battery OEM siamtute chuan advanced BMS kaltlangin charge thukzia leh discharge an control a, cycle life a tipung thei a, chutih rualin himna an enfiah bawk.
Lithium iron phosphate atan chuan lithium iron phosphate mole khatah lithium ion 1 mol 1 chuan a reaction-ah hian a tel kim thei a ni. Chuvangin, lithium iron phosphate material (relative molecular mass 157.8) chu theoretical leh actual specific capacity a ni.
1(Mol)×96485(C/Mol)/157.8(g){{3}C/G{4}(Ma·H/G) (1.7) (1.7)
Nature-ah chuan Li/li⁺-a standard redox potential chu a hniam ber a, -3.04 V (vs. standard hydrogen electrode) a thleng. Carbon negative electrode materials atan chuan lithium-ion lakchhuah leh insertion theihna chu Li/li⁺ equilibrium potential hnaih ber a ni. Electrochemical theory ang chuan room temperature-ah chuan carbon negative electrode-a electrode potential E chu 100 a ni.
e=E℃+ 0.02567 · Ln[C(li⁺)/c(li,c₆)] (1.8)
khawnge
e℃- standard electrode theihna;
c(li5) - electrolyte solution-a lithium ion awm zat;
C(li,c₆) - Negative electrode carbon-a lithium ion awm zat.
Solution leh negative electrode carbon-a lithium ion concentration a hnaih chuan negative electrode-a electrode potential chu standard reduction potential E℃nen a inang a ni. A tlangpuiin electrolyte-a lithium ion concentration chu a fix a, chuvangin negative electrode carbon-a lithium ion concentration inthlak danglamna chuan negative electrode potential-ah danglamna a thlen ang. Tunah hian X value hrang hrang hmanga LI/C3-a equilibrium potential dik tak chhut theihna tur universal method a awm lo. A tlangpuiin experimental-a tihfel a ni. Experiment-ah chuan graphite-based materials delithiation potential chu a tlangpuiin 0–0.4 V (vs. li/li⁺) inkar a danglam tlangpui tih hmuhchhuah a ni a, chu chuan an hmanna tur negative electrode materials a tling tawk lo hle. Figure 1.2-ah hian graphite negative electrode-a charge-discharge characteristic curve tlangpui tarlan a ni.
Licoo2 positive electrode material tan chuan lithium intercalation/deintercalation process hi{{0}phase reaction pakhat a ni. Positive electrode material-a lithium ion concentration a inthlak danglam chuan positive electrode-a potential pawh a danglam ve bawk. Electrolyte-a lithium ion concentration chu 1 mol/L a nih dan ngaihtuah chuan, equation (1.1-a reaction atan) positive electrode potential E chu .
e=E℃+ 0.02567 · Ln[c(li⁺,coo2)/c(lioo2)] (1.9)
khawnge
e℃- standard electrode theihna;
c(licoo3) - Positive electrode material-a LICOO2 awm zat;
c(li5,coo2) - Positive electrode material-a Li⁺ leh COO2 awm zat;
Lithium ions te lakchhuah a nih chuan positive electrode potential chuan hnuai lam hawia thil awm dan a lantir a ni.
Lithium iron phosphate material-a charge-discharge process chu delithiation hnua lithium iron phosphate atanga iron phosphate-a a chantir hi a ni.
Lithium iron phosphate electrode-a reaction awm chu .
A rilru a buai em em a, a rilru a hah em em bawk a.
A lithium-ion intercalation/deintercalation process chu two-phase reaction a ni. Chuvangin, positive electrode material-a lithium ion concentration inthlak danglamna hian positive electrode inthlak danglamna a nghawng lo. A equilibrium potential chu .
e=E℃+ 0.02567 · LN[C(Fepo₄)/C(Lifepo₄)] (1.11)
Pure solids concentration chu 1. A thermodynamic parameters atanga chhut chuan theoretical equilibrium potential chu 3.4 V a ni.
Lithium iron phosphate material-a charge-discharge characteristic curve tlangpui chu Figure 1.3-ah hian kan hmu a.
Lithium-ion battery te performance characteristics .
Battery dang nena khaikhin chuan lithium-ion battery hian a hnuaia characteristics te hi lithium-ion battery distributor leh industrial clients te hriat lar tak a nei a:
Energy density sang tak a nei bawk.Lithium{{0}ion battery te energy density chu 100 W·H/kg leh 200 W·H/L aia tam a thleng thei. Tun hnaia Ternary cathode lithium-ion battery te chuan mass specific energy 200 W·H/kg an nei thei a. High-Nickel silicon-based anode materials leh lithium-rich cathode materials hmangin mass specific energy chu 400 W·H/kg a nih beisei a ni a, volumetric energy density chu 900 W·H/L a ni ang a, traditional battery a pel hle ang. Chuvangin, lithium-ion battery hi portable electronic product leh electric vehicle-ah te hman a ni nasa hle.
High open-circuit voltage.Non-aqueous organic solvent hman a nih avangin single-cell voltage chu 3.6–3.8 V a thleng a, hei hi nickel-metal hydride emaw nickel-cadmium battery aiin a let 2–3 in a sang zawk a ni. High-voltage cathode materials te effective taka hman chuan cell pakhat operating voltage chu 4.5–5 V ah a tisang thei a, hei hi lithium-ion battery te energy density sang tak awm chhan pawimawh tak pakhat a ni.
High-rate charge leh discharge nei thei.Entirnan, all-Solid-State lithium-ion battery polymer electrolyte hmanga siam chuan himna tha tak nen discharge rate 10C aia sang a hmu thei a; Cathode angin lithium iron phosphate hmanga lithium-ion battery te chuan 100C discharge an hmu thei a ni.
Low self-discharge rate a ni.Room temperature-ah chuan thla tin self-discharge rate lithium-ion battery hi a tlangpuiin 10% aia tlem, nickel-metal hydride battery (15%) leh nickel{{5} cadmium battery aiin a chanve aia hniam a ni. Lithium iron phosphate battery-a self-discharge rate chu a tlangpuiin 3% aia tlem a ni.
boruak tichhe lo, .Lead, cadmium, mercury, leh thil dang hlauhawm tak tak a awm lo va, boruak a ti bawlhhlawh lo.
Memory effect a awm lo.Memory effect tih hian phenomenon a kawk a, chutah chuan battery capacity a tlahniam a, fully charged hmaa recharge emaw, fully charged hmaa hman emaw a nih chuan (memory effect is not capacity decay). Lithium-ion battery hian memory effect a nei lo.
Hriselna tha tak a ni.Lithium-ion battery hian carbon materials chu negative electrode atan an hmang tlangpui a, chu chuan metallic lithium nena inmil electrode potential a nei a ni. Lithium ion hian carbon-ah hian reversibly intercalate leh deintercalate a nei thei a, lithium metal deposition awm theihna a ti tlem hle a, battery himna nasa takin a tichangtlung thei bawk. Tun hnaiah flame-retardant additives, flame-retardant separator, PTC (positive temperature coefficient) device, explosion-proof valve, battery management system, leh technology dangte chuan lithium{{6}ion battery himna sang tak a thlen a ni.
Cycle nun rei tak.Lithium{{0}ion battery cycle life hi a tlangpuiin cycle 500 aia tam a ni. Lithium iron phosphate battery te cycle life hi a tlangpuiin 2000–3000 cycle a ni. Anode material systems with high cycle capability (lithium titanate ang chi) nena inmil chuan cycle 10,000 chuang a awm thei a ni. Hei hian lithium iron phosphate battery te chu energy storage battery system leh large-scale ESS project atan duhthlan tur tha ber a ni.
