Nyocha nke CATL phosphate na-ebu batrị lithium nchekwa nchekwa dị elu kpatara ihe kpatara ya

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Προμηθευτής φορητών σταθμών παραγωγής ενέργειας

Catlcatl na-eji batrị lithium iron phosphate ion azụmahịa ya iji chọpụta ihe kpatara enweghị ikike nchekwa na oghere eletrik, 60 Celsius. Usoro nbibi ike batrị sitere na batrị na sistemu ọkwa osisi site na njirimara anụ ahụ yana nleba anya arụmọrụ elektrọn. I.

Nnwale usoro nnwale site na iji mmepụta CATL nke batrị ion square phosphate nwere 86AH. Batrị bụ ihe dị mma electrode na LifePO4, graphite bụ ihe na-adịghị mma electrode, na-eji polyethylene separator na a LiPF6 electrolyte. Họrọ batrị 20 dị nso na otu batch na ịrụ ọrụ eletrik iji chekwaa, nwalee arụmọrụ eletriki nke batrị ahụ.

A na-echekwa batrị 100% SOC 60 Celsius C na pịa n&39;etiti 2.50 ruo 3.65V, mwepu nke 0.

5C nkwalite - okirikiri chaja. Mgbe ahụ, a na-echekwa batrị nwere ike chajịja na 60 Celsius. Otu a ugboro ugboro, na-edekọ usoro mbelata ikike nke batrị.

N&39;oge ule ikike nke ọ bụla, a na-anwale nguzogide n&39;ime DC (DCR) nke batrị 5C/30S. Were batrị ahụ n&39;oge nchekwa dị iche iche yana n&39;ọnọdụ ewepụtara zuru oke, gbakọtara n&39;ime igbe mkpuchi AR gas. Jiri mikroskopu eletrọn na-enyocha ikuku ikuku iji hụ ihe nrịbama polar, jiri ihe nyocha elu dị iche iche nwalee mpaghara elu ahụ akọwapụtara.

N&39;ime igbe aka, a na-eji teepu transperent mechie mpempe electrode ahụ, a na-enyocha ihe electrode site na iji X-ray diffractometer. The pola ibe mgbe mgbasa nke batrị bụ electrode na-arụ ọrụ, na lithium mpempe akwụkwọ bụ counter electrode, na-onwem n&39;ime a CR2032 ikechi batrị, na electrochemical Njirimara nke yin na usụhọde efere. Igwe ọkụ eletrik nke impedance spectrum nke batrị ntanye nwere ebe ọrụ electrochemical.

Nyocha nke ọdịnaya elemental nke mpempe akwụkwọ electrode na-eji ihe spectrometer inductive njikọ plasma emission spectrometer. Nke abụọ, a tụlere nsonaazụ 1. Nyocha arụmọrụ batrị Foto 1 bụ mbelata ikike batrị na ịrụ ọrụ chaja na mwepụ.

Site na ịgbatị oge nchekwa, ikike batrị na-eji nwayọọ nwayọọ na-ere ere. Mgbe oge nchekwa ruru 575d, ike batrị attenuation bụ 85.8% nke mbụ ike.

A na-akwụ ụgwọ ma wepụ batrị ahụ na 0.02 C, na usoro voltaji batrị na-ajụ nwere ion lithium agbakwunyere site na ọtụtụ nyiwe nke graphite kpatara, na-egosi na 0.02c magnification enyela ya na nhazi graphite na nhazi graphite n&39;oge usoro lithium ion.

O zuru ezu. , Na-ekpochapụ nke ọma mmetụta nke polarization na cycles. Ọgụgụ 1 Atụnyere mbelata ikike batrị na ụgwọ ọrụ na ịchaji ya na 0.

5 na-ebuwanye ibu, ụgwọ na mwepụta na-ebelata ka ọ bụrụ 0.02c, nke nwere ike ịbawanye ikike njigide nke batrị 181 na 575d ruo 0.8% na 1.

4%. Ya mere, ike batrị attenuation kpatara site na ogologo oge nchekwa okpomọkụ dị elu bụ mbelata ikike a na-apụghị ịgbanwe agbanwe. Na mgbakwunye, ọ na-egosipụta na njupụta nke batrị DC esịtidem iguzogide na-abawanye na ọ bụghị dị ịrịba ama, nke na-egosikwa na esịtidem polarization nke batrị abụghị ihe dị mkpa na-akpata kalenda nchekwa batrị ike irreversible attenuation.

2. Iji nyochaa isi iyi ike batrị, a na-ana batrị 100% SOC ma ọ bụ wepụ ya na 100% DOD ka 1C gachara. Nyocha nke okporo osisi a chụpụrụ achụpụ iji nyochaa mmetụta nke nchekwa okpomọkụ dị elu na nhazi, ihe mejupụtara elemental na njirimara electrochemical nke yin na ihe na-arụ ọrụ dị ala.

Nyocha imikpu nke oge nchekwa batrị dị elu dị elu dị iche iche na-ese slide na 100% DOD XRD map. Tụnyere ụdị ụdịdị dị iche iche nke XRD nke LifePO4 na FEPO4, ọnụ ọgụgụ dị iche iche nke mmịfe polar kwekọrọ, enweghị usoro dị iche iche. Ọnụọgụ 2 XRD ụdịdị batrị batrị nke oge nchekwa dị iche iche Elu okpomọkụ ebe nchekwa azụ electrode mpempe akwụkwọ electrochemical na-ebelata oge nchekwa dị iche iche na 100% SOC, nke a na-eji electrode dị ka batrị na-arụ ọrụ batrị, chaja na mwepu ya na 0.

1C nkwalite. Mwepu mbụ nke cathode na-arụ ọrụ nke batrị oge nchekwa dị iche iche dị elu karịa 155 mAh / g, yana ikike akọwapụtara nke ihe na-arụ ọrụ cathode na-enweghị batrị nchekwa dị nso na nchekwa nke usoro LIFEPO4 na-enweghị mmebi doro anya. A na-agbakwunye ụgwọ voltaji na-adịgide adịgide nke batrị buckle na Figure 3 (c), mana ngụkọta ego nke chaja ka dị nso na ikike kpọmkwem nke ihe na-arụ ọrụ cathode na-enweghị batrị nchekwa.

Polarization nke cathode batrị mgbe 575D na-abawanye, mana ikike nchekwa lithium nke ihe cathode adịghị emetụta, na ntinye ngwaahịa decomposition electrolyte na usoro echekwara nwere ike jikọta ya. Fig. 3 bụ batrị ntakiri ebe chaja na mwepu nke batrị ntanye na-agbakọta site na igwe ime ụlọ nke batrị anaghị edozi ya sitere na 181 na 575d, n&39;otu n&39;otu, yana 335.

6 na 327.1 mAh / g, n&39;otu n&39;otu. A na-enyocha batrị eriri nke anode batrị echekwara ka ọ bụrụ 0.

8% na 3.0%, na-egosi na nchekwa okpomọkụ dị elu nke graphite lithium dịkwa ntakịrị. Maka nchekwa nchekwa batrị, ọnụọgụ anode na batrị dum na-adịkarị karịa 10% nke ikike mkpokọta cathode zuru oke, yabụ ngbanwe ikike nke anode na-enweghị ike ime site na nchekwa nchekwa dị elu anaghị emetụta ikike batrị dum.

Nchekwa 181 na 575D anode bụ ikike nha ụgwọ mbụ nke ego a na-agaghị akwụsị akwụsị nke 90.4% na 84.5% nke ụgwọ mbụ nke anode, n&39;otu n&39;otu, yana ọnụego njide ikike nke ezigbo batrị dị nso.

Ya mere, ihe dị mkpa kpatara mbelata ikike batrị bụ mfu nke ion lithium na-arụ ọrụ na batrị niile. Na nchịkọta, nchekwa okpomọkụ dị elu agaghị emetụta nhụta nke LIFEPO4 na graphite electrodes. 100% DOD batrị nchekwa okpomọkụ dị elu The cathode nke pell bụ ọnụnọ, ihe kpatara ọnụọgụ lithium ion nwere ike ịnweta anode abụghị mgbanwe dị ịrịba ama na ikike nke ịgbanwe ihe electrode na-arụ ọrụ, ma n&39;ihi batrị dị na batrị.

Ọnụ ọgụgụ nke ion na-aghọ obere. Ion lithium na-arụ ọrụ na batrị na-eri site na electrode / electrolyte interface nke electrode / electrolyte interface, na isi ihe kpatara ọnwụ lithium ion na-arụ ọrụ na-enyere aka ịmatakwu usoro nke nkwụsị ikike nchekwa. Polar micropatological analysis nke LifePO4 ahụ dị na cathode na cathode, nha nke ihe dị ka 200 nm; mgbe 181D nchekwa, ihe efu size n&39;etiti LIFEPO4 ahụ adịghị agbanwe agbanwe; mgbe nchekwa 575D gasịrị, a na-ebelata ọdịiche dị n&39;etiti ihe ndị ahụ.

Na graphite anode, ka oge nchekwa abawanyela, ọnụ ọgụgụ nke ngwaahịa reactive akụkụ na-agbanwekwa [Fig. 4 (d), (e), (f)). A na-edobe ngwaahịa sub-reactive na usoro a na-echekwa okpomọkụ dị elu na ogwe osisi ahụ, a na-agbanwekwa ọdịdị nke osisi ahụ.

Iji kọwapụta mmetụta nke sub-mmeghachi omume na mfu lithium ion na-arụ ọrụ nke e kwuru n&39;elu, a na-enyocha ọdịnaya Li dị na mmewere yin na nke nwoke iji mụọ ihe kpatara mfu lithium ion nọ n&39;ọrụ. Ọgụgụ 4 Tebụl morphology batrị 1 bụ nsonaazụ ule ICP-OES nke 100% SOC batrị yin anode. Mgbanwe na ọdịnaya Li na cathode abụghị ihe doro anya.

A na-edobekwa ọdịnaya LI nke anode n&39;otu ọkwa ahụ, ya mere ngụkọta nke ike nke yin na pole okenye LI na batrị oge nchekwa dị iche iche agbanwebeghị nke ukwuu. Tebụl 1 Batrị oge nchekwa dị iche iche (100% SOC) ọdịnaya ọdịnaya polar Ebe ọ bụ na mpempe akwụkwọ cathode batrị 100% SOC nwere obere obere, mfu nke ion lithium na-arụ ọrụ dị mkpa itinye na anode. Na 100% SOC nchekwa okpomọkụ dị elu, anode nọ n&39;ọnọdụ nke podium nọ n&39;ọnọdụ ebe ike ya dị ntakịrị, na electrolyte na-emeghachi ngwa ngwa n&39;elu ya, na ion lithium na-eri, na ngwaahịa na-emeghachi omume nke lithium nwere akụkụ.

Iji chọpụta ihe mejupụtara nke elu lithium soluble nke anode, a na-edobe mbibi nke batrị 100% DOD, yana nsonaazụ ya gosipụtara na tebụl 2. Tebụl 2100% DOD batrị Anode soluble lithium mejupụtara elu anode na morphology carbonate, nke na-abawanye ka oge nchekwa na-agbatị (lee Tebụl 2), na-egosi na usoro nchekwa batrị na-emepụta ọnụ ọgụgụ buru ibu nke nnu lithium inorganic. Nnu inorganic bụ ngwaahịa dị mkpa nke mmeghachi omume mbelata ihe mgbaze, nke a na-akpata site na nnukwu ire ere nke electrolyte n&39;oge nchekwa batrị.

Electrode Reaction Dynamics Electrochemical Exhaust Spectroscopy (lee foto 5), ọ bụ ezie na cathode RCT na-abawanye na oge nchekwa okpomọkụ dị elu [Fig. 5 (a)], ma cathode RCT dị ntakịrị, nguzogide n&39;ime batrị dịkwa ntakịrị. Anode EIS [Fig.

5 (b)] RSEi abụghị ihe doro anya na oge nchekwa, mana RCT na-agbatịkwu oge nchekwa. N&39;ihi ntinye nke ngwaahịa sub-reaction electrolyte n&39;oge nchekwa dị elu, mpaghara mpaghara anode na-ebelata na oge nchekwa, na mpaghara anode kpọmkwem nke 0, 181 na 575d batrị bụ 3.42, 2.

97 na 1.84cm2 / g. Mpaghara elu nke anode na-ebelata ọrụ mmeghachi omume electrochemical nke na-eme n&39;elu anode, na-ebute mmụba nke nguzogide nnyefe ụgwọ RCT n&39;elu anode / electrolyte.

Fig. A kọwara 5 n&39;ụdị impedance electrochemical nke batrị ntakiri. N&39;oge usoro nchekwa nchekwa dị elu, steeti lithium anode nọ n&39;ọnọdụ nwere ike dị ala, na mmeghachi omume mbelata electrolyte na-eri ion lithium na-arụ ọrụ, na n&39;ikpeazụ na-emepụta nnu lithium inorganic; elu okpomọkụ agbakwunyere electrolysis Liquid Mbelata mmeghachi omume mmeghachi omume, na-enye nnukwu ego nke lithium ion (Njirimara 6).

Ọzọkwa, n&39;akụkụ anode reactive ngwaahịa nkwụnye ego, SEI ihe nkiri na-tobisiri ike, na-akpata mmebi nke electrode kinetic arụmọrụ. Ọnụ ọgụgụ 6, a na-egosi igwe attenuation ikike nchekwa. 3.

Batrị elu okpomọkụ nchekwa arụmọrụ Mma n&39;ihi ikike ọnwụ na batrị elu okpomọkụ usoro nchekwa dị mkpa lithium ion ọnwụ kpatara site n&39;akụkụ mmeghachi omume si n&39;elu nke anode, Ebe ọ bụ na-agbakwụnye SEI film thermally stabilizing mgbakwunye (ASR) nwere ike welie elu okpomọkụ kwụsie ike nke SEI film, belata n&39;akụkụ reactivity nke elu nke anode, belata arụ ọrụ lithium ion ọnwụ. Ọnụọgụ 7 Ebe nchekwa batrị dị iche iche na SEI membrane thermostability akụrụngwa na-agbakwunye 1% ASR nwere ike melite ndụ nchekwa okpomọkụ dị elu nke batrị ahụ nke ọma. Ka ịgbakwunye 1% ASR, oke njigide ikike 575D gbagoro site na 85.

8% ruo 87.5% [Foto 7 (a)]. Ọnụego mpịakọta DCR dị ala nke ukwuu karịa nke electrolyte ntọala, yana ọdịnaya nke anode soluble nke nwere lithium nwere ebelatala (Table 3).

A na-eme nyocha DSC na 100% SOC batrị anode [Fig. 7 (b)], mmịpụta okpomọkụ na-arị elu n&39;okpuru 100 Celsius maka ihe mgbaze fọdụrụnụ. Isiokwu 3 Tupu anode soluble lithium 100% DOD batrị, na anode soluble lithium na-agbakwunyere, na anode 90 Celsius C amalite exotherm, nke decomposed maka anode elu SEI; Mgbe ịgbakwunye ASR, a na-abawanye okpomọkụ nke ire ere ruo 101 Celsius.

Mgbe agbakwunyere ASR, a na-eme ka nkwụsi ike okpomọkụ nke SEI dịkwuo mma, na nkwụsị lithium ion na-arụ ọrụ nwere ike ibelata nke ọma, na ndụ nchekwa batrị nwere ike imeziwanye. Nke atọ, nkwubi okwu ikpeazụ na-enyocha ihe ndị electrochemical, polar physics na electrochemical properties nke azụmahịa phosphate ion batrị nchekwa okpomọkụ dị elu, wee chọpụta na ike batrị na nchekwa nchekwa dị elu dị mkpa site na electrolyte mbelata anode na ikike dị ala. , Na-akpata ọnwụ lithium ion na-arụ ọrụ.

A na-edobe ngwaahịa sub-reactive nke anode mbelata electrolyte na anode, na akụkụ inorganic nke dị na nkwụnye ego na-egbochi mgbasa nke lithium ion, nke mere na mmeghachi omume anode na-ebelata. Site n&39;ịgbakwunye SEI membrane thermostability na electrolyte iji meziwanye nkwụsi ike nke ihe nkiri SEI nke ọma, belata mmeghachi omume mbelata nke electrolyte, belata oriri lithium ion na-arụ ọrụ, ma melite ndụ nchekwa okpomọkụ.