Indlela yokuphucula ukusebenza kwebhetri ye-lithium ion? Indlela yokubona ukuba ityala lithetha njani!

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Zentral elektriko eramangarrien hornitzailea

Ibhetri ye-lithium ion kunye ne-lithium iron phosphate ukhuseleko oluphezulu, inzuzo yobomi bomjikelezo omde, ibhetri ephambili yemoto yombane. Ibhetri iya kunciphisa ubomi bayo ixesha elide, iphonononge ukulahlekelwa kwamandla ebhetri ye-lithium ion ngexesha leenkqubo zokugcina ukushisa okuphezulu, okunceda ukuqonda indlela yokungaphumeleli kwebhetri ye-lithium-ion, kunye nokuphucula ukusebenza kwebhetri. Nangona isixa esikhulu soncwadi lufundwe yilahleko yebhetri ye-lithium ion, i-original ibangelwa kuhlalutyo lokunciphisa i-electrolyte, ukukhula kokuqina kwe-SEI membrane kunye ne-polarization ebangelwa yibhetri, kodwa uphando lwangoku lukhawulelwe kwiqhosha (Hem) Uphando oluncinci malunga nokungaphumeleli kwebhetri ye-lithium-ion yorhwebo (ibhetri epheleleyo).

I-Ningde Times i-CATL isebenzisa ngokurhweba ngokusekelwe kwibhetri ye-lithium-ion njengesampuli, iphonononga imvelaphi yayo yasekuqaleni kumandla, i-60 ¡ã C ukulahleka komthamo wokugcina. Ngokubonakaliswa komzimba kunye novavanyo lwentsebenzo ye-electrochemical, indlela yokubola amandla ebhetri ukusuka kwinqanaba lebhetri kunye nenqanaba lepali kubaluleke kakhulu ukuphononongwa! 1. Uvavanyo lwenkqubo yovavanyo usebenzisa i-CATL esetyenzisiweyo umthamo we-86AH we-lithium-ion ibhetri.

Ibhetri yi-cathode material, igraphite yinto ye-anode, isebenzisa i-polyethylene (PE) diaphragm kunye ne-carbonate group LiPF6 electrolyte. Khetha iibhetri ezingama-20 kufutshane nebhetshi efanayo kunye nokusebenza kombane ukugcina, ukubona ukusebenza kombane kwebhetri. 100% SOC ibhetri 60 ¡ã C igcinwe kumatshini wokushicilela phakathi kwe-2.

I-50 ukuya kwi-3.65V, ukukhutshwa kwe-0.5C yokukhulisa - umjikelezo wokutshaja.

Emva koko qhubeka ugcinwa kwi-60 ¡ã C ye-60 ¡ã C. Oku kuphindaphindiweyo, ukurekhoda inkqubo yokunciphisa umthamo webhetri. Ngexesha lokufunyanwa komthamo ngamnye, ukuchasana kwangaphakathi kwe-DC (DCR) kwebhetri 5C30S kufunyenwe.

Thatha amaxesha ahlukeneyo okugcina kunye nokukhutshwa ngokupheleleyo (100% DOD), qhaqha. Sebenzisa imakroskopu ye-electron ephumayo ukujonga i-polar morphology, sebenzisa indawo ethile yomphezulu othile kunokonakala komphezulu. Kwibhokisi yeglavu, ishidi le-electrode livalwe nge-tape ye-translucent, kwaye i-electrode material material iqulunqwe kusetyenziswa isixhobo se-X-ray diffraction.

Isiqwenga se-polar emva kokuchithwa kwebhetri yi-electrode esebenzayo, i-lithium sheet yi-counter electrode, kwaye ifakwe kwi-CR2032 ibhetri ye-buckle, kunye neempawu ze-electrochemical ze-yin kunye ne-plate ephantsi. I-electrochemical impedance spectrum yeebhetri ze-buckle ezinendawo yokusebenza ye-electrochemical. Umxholo we-Elemental kwiphepha le-electrode usebenzisa i-inductive coupling plasma emitting spectrometer (ICP-OES).

2. Ngenxa yoko, ingxoxo 2.1 Ukubola kokusebenza kwebhetri kuhlawuliswa kwaye kukhutshwe ngu-0.

02C ukutyumza. KwiFig. I-1 (c), i-ion ye-lithium ifakwe kwisininzi samaqonga abangelwa yi-lithium ion kwi-curve yombane webhetri, ebonisa ukuba i-0.

Ukwandiswa kwe-02c kufakwe kwi-lithium ion. Ukuphumla kwezakhiwo zegraphite kwinkqubo yokushiya ixesha elaneleyo kunokuphelisa ngokufanelekileyo imiphumo ye-polarization kwimijikelezo. Xa kuthelekiswa no-0.

Ukwandiswa kwe-5C, yi-0.8% kuphela (90.7% vs.

91.4%) kunye ne-1.4% (85.

8% vs.87.3%).

Ke ngoko, ukucutha umthamo webhetri okubangelwa kukugcinwa kobushushu obuphezulu bexesha elide kukuthomalalisa umthamo ongenakuguqulwa. Ukongeza, iFIG. I-1 (a) ibonisa ukuba i-amplitude yesakhono sebhetri yonyukile kunye nexesha logcino, nto leyo ebonisa ukuba ukwahlulahlula ngaphakathi kwebhetri asiyonto ibalulekileyo eyintsusa ebangelwa kukungakhathali komthamo webhetri wogcino lwekhalenda.

2.2 Umatshini wokunciphisa umthamo webhetri Ukubola ukubola amandla ebhetri imithombo yokunciphisa amandla, ibhetri yokugcina ubushushu obuphezulu ihlawuliswa kwi-100% SOC okanye ikhutshwe kwi-100% DOD emva kokukhulisa i-1C. Ukubola i-pole edibeneyo ukuze uhlolisise imiphumo yokugcina ukushisa okuphezulu kwisakhiwo, ukubunjwa kwe-elemental kunye neempawu ze-electrochemical ze-yin kunye nezinto ezingaphantsi ezisebenzayo.

2.2.1 I-LIFEPO4 ekujuleni kokucima okunzulu kuya kubonakala ngokusondeleyo kwimephu ye-FEPO4XRD, ngelixa i-LIFEPO4XRD i-spectrum isondele kakhulu kwi-Lifepo4XRD spectrum kwi-LIFEPO4 yobunzulu.

Ngelo xesha, kukho isigaba se-lithium kunye nesigaba se-lithium kwi-pole ye-LiFePO4 ekhutshwe ngokupheleleyo, kwaye umxholo we-lithium-phase unyuswa kunye nexesha lokugcina, ebonisa ukuba inani le-lithium ion elikwazi ukufakela i-lattice ye-FEPO4 i-redu.