Dɛn ne cathode active material?- Polinovel .

Cathode ade a ɛyɛ adwuma ne aduru a wɔde powder ayɛ a wɔde di dwuma wɔ positive electrode a ɛwɔ .Lithium ion batere .Ɛno de lithium ions sie na ɛma ɛgyae bere a ɛrebɔ ne nsu a ɛrepue no. Saa nneɛma yi, a mpɛn pii no ɛyɛ dade oxide a lithium wom a wɔde dade a ɛsakra te sɛ nickel, manganese, ne cobalt ka ho no, na ɛkyerɛ batere bi ahoɔden a ɛyɛ den, kyinhyia no nkwa, ne ahobammɔ su.

Cathode no yɛ 30-40% wɔ lib cell no ka nyinaa mu na egyina hɔ ma ade biako a ne bo yɛ den sen biara. Bere a batere no reyɛ adwuma no, lithium ions tu kɔ cathode no ne anode layers ntam-a ɛkɔ cathode no mu bere a wɔretu no na ama anyinam ahoɔden aba, afei ɛsan kɔ anode no mu bere a wɔrebɔ no.

Cathode active nneɛma no yɛ lithium a wɔde ka ho ne transition metal oxides wɔ crystalline structures a ɛma kwan ma reversible lithium-ion intercalation. Cathode nnuru atitiriw anum a ɛhyɛ gua no so no mu biara de adwumayɛ ho nsɛm a ɛda nsow ma.

Lithium nickel manganese cobalt oxide (NMC) no wɔ dadeɛ mmiɛnsa a ɛwɔ nsusuiɛ ahodoɔ mu-aduru a wɔtaa yɛ no bi ne NMC 111 (afã a ɛyɛ pɛ), NMC 622, ne NMC 811 (a ɛkorɔn-nickel). Nickel no ma ahoɔden a ɛkorɔn, manganese boa ma structure stability, na cobalt ma conductivity yɛ kɛse na ɛtrɛw cycle nkwa mu. NMC 811 de 180-200 MAH/G tumi a ahoɔden densities du 260 wh/kg ma, na ɛma ɛyɛ nea wɔpɛ ma anyinam ahoɔden kar a ɛkɔ akyirikyiri.

Lithium iron phosphate (LFP) de dade ne phosphate pii di dwuma sen sɛ wɔde cobalt ne nikel a ɛho yɛ na bedi dwuma. Formula LifePo4 no, saa chemistry yi yɛ adwuma wɔ ahoɔden a ɛba fam (3.2V nominal) nanso ɛkyɛn mu wɔ ɔhyew a ɛyɛ den ne ahobammɔ mu. LFP batere ahorow no gyina ahoɔden a ɛboro 2,000 ano na ɛmma oxygen nkɔ bere a ɔhyew no reguan no, na ɛtew ogya ho asiane so kɛse. Wɔ afe 2023 mu no, LFP kyeree wiase nyinaa cathode gua no 40%, a ɛnam nea wɔde di dwuma wɔ China EV ne ahoɔden a wɔkora so nhyehyɛe mu na ɛkanyan no.

Lithium cobalt oxide (LCO) na ɛyɛ mfitiase lithium-ion cathode nneɛma a Sony de dii gua wɔ 1991. Bere a ɛde ahoɔden a ɛkorɔn sen biara ma wɔ cathode ahorow mu no, LCO hu amane wɔ ɔhyew a entumi nnyina yiye wɔ tebea horow a ɛkorɔn ne kyinhyia nkwa a ɛwɔ anohyeto mu. Nea wɔde di dwuma no adan akɔ ɛlɛtrɔnik mfiri a wɔde di dwuma so kɛse te sɛ smartphone ne laptop, baabi a ahunmu a ɛnyɛ den no boro ɛka a wɔbɔ ho asɛm no so.

Lithium nickel cobalt aluminium oxide (NCA) taa kura nickel 80%, cobalt 15%, ne aluminium 5%. Tesla dii kan gyee NCA a wɔfaa no wɔ anyinam ahoɔden kar mu, a ɛde ne ahoɔden a ɛkɔ soro a ɛte sɛ NMC dii dwuma nanso ɛwɔ ɔhyew a ɛyɛ den sen nikel nnuru a ɛho tew. Nanso, NCA kyerɛ sɛ ɛresɛe ntɛmntɛm wɔ mmeae a ɛkorɔn, na ɛhwehwɛ sɛ wɔhwɛ batere so yiye.

Lithium manganese oxide (LMO) yɛ abiɛsa-afã a ɛwɔ akyi a ɛma ahoɔden a ɛkɔ soro ne ahobammɔ a ɛkyɛn so. Ɛmfa ho sɛ ahoɔden a ɛwɔ mu no sua sen nickel-based cathodes no, LMO no ɔhyew a ɛyɛ den ne ne bo a ɛba fam no ma ɛfata ma nnwinnade a ɛma ahoɔden ne nnuruyɛ mfiri a ɛhwehwɛ sɛ wɔde nsu a ɛkɔ mu kɛse di dwuma.

cathode active material

Cathode active material production fa multi-stage high-temperature solid-State reaction process a ɛhwehwɛ sɛ wɔhwɛ so pɛpɛɛpɛ wɔ composition, particle size, ne crystalline structure so.

Adeyɛ no fi ase denam precursor cathode active material (PCAM) a wɔyɛ so. Wɔ NMC cathodes fam no, wɔde dade sulfates a ɛyɛ nickel, manganese, ne cobalt no gu solution mu na CO-precipitated sɛ mixed metal hydroxides wɔ stirred reactors mu. pH control wɔ saa crystallization anammɔn yi mu no yɛ ade titiriw-Shift a ɛyɛ 0.1 pH pɛ no betumi asesa particle morphology ne size distribution kɛse. Wɔde hydroxide a ɛtɔ gu fam no yiyi mu, hohoro mu, na wɔma ɛyow ma ɛyɛ PCAM powder no.

Afei wɔde saa precursor yi fra lithium hydroxide anaa lithium carbonate wɔ ratios a ɛyɛ pɛpɛɛpɛ mu na ɛyɛ hyew ma ɛyɛ 700-900℃wɔ oxygen-a ɛma wim yɛ kɛse ma 12-24 nnɔnhwerew. Saa calcination step yi ma efĩ fi adi na ɛyɛ metal-oxide crystals a ɛne ne ho hyia ne layered structure a ɛho hia ma lithium-ion intercalation no. Sintering temperature, wim tebea, ne ɔhyew bere tenten na ɛkyerɛ ade a etwa to no electrochemical su ne ɔhyew a ɛyɛ den.

Wɔ sintering akyi no, cathode ade no fa crushing ne classification mu de nya target particle size distribution-a mpɛn pii no ɛyɛ 5-20 micrometers. Wɔn a wɔyɛ no yɛ nneɛma nketenkete ahorow a ɛsono sɛnea ɛbɛyɛ a nneɛma a ɛyɛ adwuma a wɔde akata cathode current collectors so no yɛ kɛse. Nneɛma bi a wɔde yɛ no nya nneɛma foforo a wɔde kata so anaasɛ dopants a ɛbɛma conductivity ne cycle life ayɛ kɛse.

Nnansa yi nneɛma foforo a wɔayɛ no ama saa adeyɛ a ɛyɛ den yi ayɛ mmerɛw. Novonix yɛɛ All-Dry, Zero-nwura a wɔde yɛ nneɛma a ɛma ɛyɛ mmerɛw a ɛma anammɔn a edi kan no fi hɔ koraa, na ɛdan dade a wɔde yɛ aduan a wɔmfa nhyehyɛ mu no tẽẽ ma ɛbɛyɛ NMC cathodes a wɔawie. Saa nhyehyeɛ a wɔagye ho tumi krataa yi ma sika kɛseɛ ho ka so tew bɛyɛ 30% na ɛka ho ka bɛyɛ 50% berɛ a ɛgye ahoɔden a ɛsua 27% sene akwan a wɔtaa fa so no.

Anamɔn a etwa to no ma cathode slurry denam ade a ɛyɛ adwuma powder no a wɔde conductive additives (a ɛtaa yɛ carbon black), binders (mpɛn pii no polyvinylidene fluoride anaa PVDF), ne solvents (N{0}}methyl-2-pyrrolidone anaa NMP) fra mu. Wɔde saa aduru yi kata aluminum foil current collectors so, wɔde gu fononoo mu de yi nnuru a wɔde yɛ aduru no fi hɔ, na wɔde kalender fa rollers so ma ɛyɛ pɛpɛɛpɛ a ɛyɛ den-a ɛte saa ara 70 micrometers a nneɛma a ɛyɛ adwuma 15 mg/cm2 wom.

Cathode nneɛma gyina hɔ ma ade biako pɛ a ɛho ka yɛ kɛse wɔ batere a wɔyɛ mu. Wɔ afe 2024 mu no, NMC 811 cathode active material bo yɛ $109 kilowatt biara-dɔnhwerew, na ɛyɛ 53% wɔ cell nneɛma ho ka nyinaa mu ne 30% wɔ battery pack ho ka a edi mũ. LFP cathodes no bo so tew kɛse wɔ $21.90/kWh wɔ 2023 mu, a lithium carbonate gyina hɔ ma saa dodow no mu 90% wɔ $19.60/kWh.

Cathode Materials gua no duu dɔla ɔpepepem 55 wɔ afe 2024 mu a afe biara ahwehwɛde no boro kiloton 2,800. Guadiɛ ho nsusuiɛ kyerɛ sɛ ɛbɛnya nkɔsoɔ firi dɔla ɔpepepem 19.5 wɔ afe 2024 mu kɔsi dɔla ɔpepepem 52.4 wɔ afe 2034 mu, a ɛyɛ afe afe nkɔsoɔ a ɛyɛ afrafra a ɛyɛ 10.7%. Saa ntrɛwmu yi fi anyinam ahoɔden kar batere a wɔhwehwɛ, a ɛboro ɔpepem 14 a wɔtɔn wɔ wiase nyinaa wɔ afe 2023 mu no titiriw.

China di cathode a wɔyɛ so no so tumi a ɛboro 60% wɔ wiase nyinaa nneɛma a wɔyɛ mu, na South Korea ne Japan di akyi a sɛ wɔka bom a, ɛwɔ kyɛfa 25%. Nanso, tumi mu ntrɛwmu kɛse rekɔ so wɔ Europa ne Amerika Atifi fam. Basf’s Schwarzheide adwumayɛbea a ɛwɔ Germany no fii ase pre-Aguadi a wɔyɛ no kɛse-Nickel Cathode nneɛma wɔ 2023 mu, a wɔde wɔn ani sii kiloton 100 so afe biara wɔ 2025. Wɔ United States no, LG Chem ne General Motors’ Motors' Ultium Cam venture a wɔde 30-Kole 0-Kiloton 0-Kilon 1000000000000000000000000000 so no yɛ nea wɔde di dwuma wɔ 200000000000000000 so 000 Kilotons a ɛbɛba afe 2025 no.

Raw material bo nya cathode ka so nkɛntɛnso kɛse. Lithium carbonate bo akɔ soro kɛse-akɔ soro akɔ soro wɔ afe 2022 mu ansa na ɛrekɔ fam wɔ afe 2023-2024 mu bere a nneɛma foforo baa intanɛt so no. Cobalt ne nickel bo nso kyerɛ sɛ nneɛma a wɔde ma no yɛ kɛse, a nea ɛde ba a ɛde nneɛma a wɔde ma no mu ɔhaw ne amammuisɛm mu nneɛma ba. Democratic Republic of Congo de wiase nyinaa cobalt bɛboro 70% ma, bere a Indonesia ada ne ho adi sɛ obi a ɔyɛ nikel kɛse.

Saa bo a ɛkɔ soro ne nea wɔde ma yi ma nneɛma atitiriw abien a ɛkɔ so no yɛ ntɛmntɛm: nsakrae a ɛkɔ fam-ɛka a wɔbɔ wɔ LFP nnuruyɛ ne nkɔso a ɛba wɔ cobalt-akwan foforo a wɔfa so si ananmu ho. Wɔ afe 2024 mu no, nhwehwɛmufo a wɔwɔ Georgia Tech yɛɛ dade chloride cathode a ne bo yɛ 1-2% pɛ wɔ nneɛma a wɔde di dwuma daa mu bere a wɔde ahoɔden a ɛne no sɛ no sie no. Ɛwom sɛ na ɛda so ara yɛ sɔhwɛ de, nanso nkɔso a ɛte saa no betumi asan asiesie batere no sikasɛm titiriw.

Application ahorow hwehwɛ cathode adwumayɛ ho nsɛm ahorow. Electric kar ahorow di kan ahoɔden density ma karka kwan, consumer electronics bo yɛ compact size, na grid storage si cycle nkwa ne ahobammɔ so dua.

Ahoɔden a ɛyɛ den no gu ahorow kɛse wɔ nnuruyɛ mu. NMC 811 ne NCA de 200-270 WH/kg ma wɔ nkwammoaa no mu, na ɛma EV ahorow no tumi nya 300-400 miles of range. LFP ma ahoɔden density a ɛba fam wɔ 140-170 WH/kg nanso ɛde akatua ma a ɛkorɔn tenten-yɛ-yɛ te sɛ BYD anya akansi EV ranges denam cell-to-pack nkabom a eyi modules na ɛma volumetric efficiency.

Cycle life gyina hɔ ma charge dodow-yi cycles ansa na tumi no asɛe akɔ 80% wɔ original mu. LFP di mu wɔ ha a 2,000-4,000 kyinhyia, sɛ wɔde toto 1,000-2,000 ma NMC ne 500-1,000 ma LCO. Saa nkwa nna a wɔatrɛw mu yi ma LFP yɛ nea eye ma ahoɔden a wɔkora so a egyina hɔ, baabi a ebia batere bɛkyinkyin da biara da mfe 10-15. High-nickel NMC sɛe ntɛmntɛm esiane structure instability ne afã a ɛyɛ adwuma wɔ voltages a ɛkorɔn mu nti, ɛhwehwɛ sɛ wɔhwɛ ɔhyew so yiye.

Ahobammɔ su fi ɔhyew ne nnuru a ɛma ɛyɛ den no mu. LFP kyerɛ ahobammɔ soronko-ne P{2}}O nkitahodi a ɛyɛ den no siw oxygen a ɛba bere a nsɛm a ɛma ɔhyew ba no ano, na ade no nkɔ exothermic porɔwee mu kosi sɛ ɛboro 270℃. NMC ne NCA cathodes porɔw wɔ ɔhyew a ɛba fam (200-250℃) mu na ɛma oxygen a ebetumi ama ɔhyew a ɛwɔ hɔ no aguan no afi hɔ. Eyi kyerɛkyerɛ nea enti a LFP di China EV gua so, baabi a ɔhyew mu ahobammɔ nya mmara mu nhwehwɛmu kɛse no mu.

Tumi tumi gyina lithium-ion diffusion rates ne electronic conductivity so. LMO Three-dimensional spinel structure ma ɛyɛ ntɛm ion transport, ɛboa discharge rates a ɛkɔ 20C-a ɛkyerɛ sɛ battery no betumi ayɛ ne tumi nyinaa wɔ nsusuwii mu wɔ simma 3 pɛ mu. NMC ne NCA taa di 1-3C rates ho dwuma, bere a LFP di 1C a ɛkɔ so ne 5C peak a ɛpae bere a wɔayɛ no yiye no ho dwuma.

Ɔhyew a wɔde yɛ adwuma no nya adwumayɛ so nkɛntɛnso wɔ wim tebea a ano yɛ den mu. LFP hu amane wɔ tumi a ɛyera kɛse wɔ awɔw bere mu esiane lithium a ɛso atew-ion mobility wɔ ɔhyew a ɛba fam nti. NMC ne NCA ma awɔw no kɔ so yɛ papa-Weather adwumayɛ nanso ɛhwehwɛ sɛ wɔyɛ ɔhyew ho nhyehyɛe a ɛyɛ nnam na wɔasiw ɔhyew a ɛboro so wɔ wim tebea a ɛyɛ hyew mu ano. Mprempren wɔn a wɔyɛ nneɛma no binom de batere di dwuma ansa na wɔreyɛ adwuma no yiye na ama LFP ayɛ adwuma wɔ atifi fam gua so.

cathode active material

Bere a batere a wɔde di dwuma no rekɔ so ntɛmntɛm no, cathode nneɛma a wɔsan de di dwuma no abɛyɛ nea ɛho hia kɛse ma nneɛma a wɔde ma a ɛbɛkɔ so atra hɔ daa ne nneɛma a atwa yɛn ho ahyia ho asɛyɛde. Akwan titiriw abiɛsa a wɔfa so yɛ nneɛma foforo aba: hydrometallurgy, pyrometallurgy, ne regeneration tẽẽ.

Hydrometallurgical processes dissolve cathode materials wɔ acid solutions mu, afei ɛpaw sɛ ɛbɛma dade mmiako mmiako no ayɛ mmerɛw na wɔatew ho. Saa kwan yi san nya lithium, nickel, cobalt, ne manganese wɔ 95-99% efficiency nanso ɛma nsuo fĩ ne nnuru a ɛho hia a ɛyɛ fĩ ba. Ascend Elements' patented hydro-to-cathode® process no tu mpɔn wɔ atetesɛm hydrometallurgy so denam ntamgyinafo anammɔn a ɛkɔ soro kodu 15 a woyi fi hɔ na ɛtew mframa bɔne a wɔtow gu so no so 49% bere a wɔde toto nnuru a wɔde yɛ nneɛma a wɔde yɛ nneɛma a wɔde yɛ nneɛma a wɔde yɛ nneɛma a wɔde yɛ nneɛma no ho no so.

Pyrometallurgical recycling smelts battery wɔ ɔhyew a ɛkɔ soro mu de yɛ dade a wɔde afra, a woyi nneɛma a ɛsom bo fi mu. Bere a ɛyɛ mmerɛw na etumi di batere mũ nyinaa ho dwuma a enni pre-ayaresa no kɛse no, pyrometallurgy di ahoɔden kɛse na ɛhwere lithium ma ɛyɛ slag. Mframa a ɛma wim yɛ hyew a efi pyrometallurgical ayaresa mu ba no yɛ hydrometallurgical akwan no mmɔho abien.

Direct regeneration gyina hɔ ma ɔkwan foforo a ɛsen biara-asiesie cathode nneɛma a asɛe sen sɛ ɛbɛpaapae mu ayɛ no dade a ɛwɔ mu. Saa kwan yi hwehwɛ sɛ wɔtetew nneɛma a ɛyɛ adwuma mu fi binders ne mprempren boaboa ano, afei wɔsan de lithium a ayera no ma denam solid-State sintering, hydrothermal treatment, anaa nkyene a wɔabɔ no mu. Direct regeneration hwehwɛ 60-80% ahoɔden a ɛsua sen extraction-based recycling na ɛmma nsuo fĩ biara mma. Nnansa yi nhwehwɛmu ahorow kyerɛ sɛ NMC cathode ahorow a wɔasan ayɛ no foforo tẽẽ no betumi ne virgin nneɛma no ayɛ adwuma anaasɛ ɛboro so.

Redwood Materials yɛ aguadi a edi kan-Scale cathode recycling facility wɔ United States, ɛyɛ tɔn 30,000 afe biara a tumi a ɛde kɔ tɔn 60,000 wɔ afe 2024 awiei. Wɔn proprietary reductive calcination nhyehyɛe no yɛ nea ahoɔden a wɔde di dwuma wɔ awiei- a wɔde di dwuma no nyinaa tumi yɛ adwuma. Facility no nya lithium 95% fi battery scrap mu na ɛdan no kɔ soro-grade cathode precursors a ɛwɔ nneɛma a atwa yɛn ho ahyia a ɛwɔ nkɛntɛnso a ɛba fam sen primary mining.

Europa Aman Nkabom no batere akwantu tumi krataa ho mmara, a efi 2027 bɛyɛ adwuma no bɛhyɛ sɛ wɔmfa nneɛma a wɔasan de adi dwuma no nyɛ hwee wɔ batere foforo ne nea ɛda adi pefee wɔ nneɛma a wɔde ma no nyinaa mu. Saa nhyehyɛe yi ama sika a wɔde bɛsan ayɛ nneɛma a wɔde di dwuma bio no bɛboro €4.5 ɔpepepem fi afe 2022, na wɔayɛ nhyehyɛe sɛ wɔbɛyɛ nneɛma wɔ Germany, Sweden, ne Hungary.

Nhwehwɛmu kɔ so piapia cathode adwumayɛ ahyeɛ berɛ a ɛredi ɛka ne nkwagyeɛ ho nsɛnnennen ho dwuma. Nkɔso ahorow pii a ɛhyɛ bɔ no renya nkɔso wɔ aguadi mu.

Single-Crystal NMC nsunsuansoɔ no resi mprempren polycrystalline nhyehyɛeɛ no ananmu. Ahwehwɛ biako pɛ na ɛma aburow hye fi hɔ wɔ baabi a mpaapaemu fi ase, na ɛma kyinhyia asetra tu mpɔn kɛse na mfiri no gyina pintinn. CATL ne adwinnan afoforo afi ase reyɛ biako wɔ biako mu-ahwehwɛ cathodes a ɛkora 90% tumi akyi 4,000 cycles-Muthed the lifespan of conventional NMC.

Lithium-Anigye manganese-gyina cathodes (LMR-NMC) betumi de bɛboro 250 mAh/g tumi denam utilizing nsakrae dade ne oxygen redox reactions. Nanso, voltage fade bere a cycling ne rate a ɛnyɛ papa no ntumi nnye ntom wɔ aguadi mu. Nkɔsoɔ a aba nnansa yi wɔ nnuru a wɔde di dwuma ne nneɛma a wɔde kata so a wɔde kata so no redi saa nsɛnnennen yi ho dwuma, a nnwumakuo dodoɔ bi de wɔn ani asi gua so a wɔde bɛba no so ansa na afe 2026 adu.

Manganese-Ade a ɛyɛ fɛ no botae ne sɛ ɛbɛtew nickel ne cobalt a ɛde ne ho to so no so bere a ɛkura adwumayɛ a ɛkorɔn mu no. BASF hyɛɛ adwumayɛbea bi a wɔde bɛyɛ nhwehwɛmu wɔ March 2024 mu maa manganese-akuturuku a wɔde di dwuma kɛse, na wogye toom sɛ manganese bo yɛ 10-a ɛba fam sen nickel mpɛn 20. Nneɛma a wɔayɛ no yiye a MN pii wom no nya NMC 811 ahoɔden a ɛyɛ den no 85-90% wɔ ɛka a ɛba fam kɛse mu.

Sodium-ion batere a wɔde Prussian blue cathodes di dwuma no ma lithium ne cobalt fi hɔ koraa. Bere a ahoɔden a ɛyɛ den no kɔ so ba fam sen lithium-ion (140-160 wh/kg), sodium dodow ne ne bo a ɛba fam no ma ɛyɛ anigye ma nneɛma a wɔkora so a egyina hɔ na ɛyɛ tiaa-rɛnfo. Chinafoɔ a wɔyɛ sodium-ion batere no hyɛɛ aseɛ yɛɛ mass wɔ afe 2023 mu, na wɔhwɛɛ kwan sɛ ahoɔden a ɛwɔ mu no bɛduru 200 wh/kg wɔ afe 2027 mu.

Solid-State battery hyɛ bɔ sɛ ɛbɛsakra cathode nhyehyɛe denam nsu mu electrolytes a wɔde dɔte a ɛyɛ den anaa polymers besi ananmu no so. Eyi ma wotumi de-voltage cathode nneɛma ne lithium metal anodes di dwuma, a ebetumi ayɛ 400-500 WH/kg wɔ cell level-ɛkame ayɛ sɛ mprempren mfiridwuma a ɛwɔ hɔ no yɛ mmɔho abien. Nanso, batere a ɛyɛ den no hyia nsɛnnennen wɔ nneɛma a wɔyɛ no kɛse ne nea ɛko tia ntam. Nnwumakuw pii a quantumscape, solid power, ne Toyota ka ho de wɔn ani asi aguadi so wɔ 2025-2030 ntam.

Intelligence a wɔde ayɛ adwuma ne mfiri adesua a wɔde bɛka abom wɔ cathode nkɔso mu no rema bere a wɔde hu ade no reyɛ ntɛmntɛm. Mprempren nhwehwɛmufo de kɔmputa so nhwɛso ahorow di dwuma de hwehwɛ nneɛma mpempem pii a ebetumi ayɛ mu, na ɛkyerɛ sɛnea wɔde anyinam ahoɔden yɛ adwuma ansa na wɔayɛ. Saa kwan yi nnansa yi ara na ɛkyerɛɛ novel a ɛkorɔn-entropy cathode nneɛma a ɛda ahoɔden a ɛkorɔn ne tumi a wɔkora so adi.

cathode active material

Raw material bo yɛ 70-80% wɔ cathode ka ho. Lithium, nikel, ne cobalt ne nneɛma titiriw a ɛma wɔbɔ ka, na cobalt yɛ nea ne bo yɛ den sen biara wɔ $25,000-35,000 wɔ tɔn biara mu. Nneɛma a wɔyɛ ho adwuma a ɛyɛ den no nso ka sɛ cathode ahorow a ɛwɔ Nickel a ɛkɔ soro no hwehwɛ ahotew ho nhyehyɛe a emu yɛ den ne nneɛma a wɔyɛ no, na ɛma ɛka a wɔbɔ wɔ nneɛma a wɔyɛ ho no kɔ soro. LFP cathodes bo yɛ 30-40% a ɛba fam sen NMC titiriw esiane dade pii a wɔde di dwuma sen sɛ wɔde nikel ne cobalt a ɛho yɛ na bedi dwuma nti.

Cathode ahorow a wɔde frafra bere a wɔresan ayɛ nneɛma foforo no ma adwumayɛ ne nneɛma a wɔyɛ no yɛ papa. NMC, NCA, ne LFP wɔ nnuru ahorow a ɛsono emu biara a ɛhwehwɛ sɛ wɔyɛ nneɛma a wɔde di dwuma wɔ ɔkwan soronko so. Nanso, nneɛma a wɔde di dwuma bio te sɛ redwood nneɛma ne li-cycle ayɛ akwan a ɛyɛ mmerɛw a ebetumi adi aduan a wɔadi afra ho dwuma denam batere a wɔhyehyɛ ansa na wɔayɛ nnuru a wɔde sa yare no ho adwuma anaasɛ wɔayɛ nsakrae. Nhwehwɛmu binom kyerɛ sɛ wɔahyɛ da de cathode ahorow pɔtee bi adi afra wɔ ratios a wɔahyɛ so mu no betumi ayɛ nneɛma foforo a ɛwɔ mfinimfini su ahorow, ɛwom sɛ eyi da so ara yɛ sɔhwɛ de.

LFP cathodes no fi awosu mu yɛ nea ahobammɔ wom esiane phosphate a ɛyɛ den a ɛkyekyere a ɛmma oxygen ntumi nkɔ mu bere a nsɛm a ɛma ɔhyew ba no nti. Wɔmfa wɔn ho nhyɛ mu kosi sɛ ɔhyew no bɛboro 270℃. Nickel-Ade a ɛwɔ cathodes (NMC 811, NCA) fi ase sɛe bɛyɛ digrii 200 na ɛma oxygen a ɛma ɔhyew a ɛguan no yɛ ntɛmntɛm no fi hɔ. Eyi kyerɛkyerɛ sɛnea batere gya a ano yɛ den a ɛkɔ soro-ahoɔden-density EVs a wɔde nickel-aduru a ɛyɛ fɛ di dwuma no mu. Nanso, battery sohwɛ nhyehyɛe a ɛkɔ anim ne ɔhyew a wɔde di dwuma no ama NMC batere ayɛ nea ahobammɔ wom a wobetumi agye atom ama nneɛma dodow no ara.

Iron contamination is particularly problematic-even trace amounts (>10 ppm) betumi ama emu short circuits ne capacity fade. Sulfur, vanadium, ne calcium nso sɛe adwumayɛ denam ahwehwɛ nhyehyɛe no a wɔsɛe no ne impedance a ɛkɔ soro no so. High-Purity precursor nneɛma taa nya 99.5-99.9% ahotew a dade a ɛwɔ mu no wɔ ase 5 ppm. Ɛsɛ sɛ wɔyɛ cathode nneɛma a wɔasan de adi dwuma no ho ahotew kɛse na ama wɔayi efĩ a aboaboa ano afi batere nkwa nna a atwam no mu.

Cathode nneɛma a ɛyɛ adwuma tra baabi a nneɛma ho nyansahu, anyinam ahoɔden, ne nneɛma a wɔyɛ ho mfiridwuma hyia. Cathode chemisries-Balancing adwumayɛ, ɛka, ne nea ɛbɛkɔ so atra hɔ no nkɔso a ɛkɔ so no-bɛhyehyɛ anyinam ahoɔden kar a wɔde di dwuma ne ahoɔden a wɔde sie a wɔde di dwuma foforo no ntɛmntɛm wɔ mfe du a ɛreba no mu.