Zvakataurwa kuti mukutanga Nyamavhuvhu, itsva simba motokari indasitiri akabvunzurudza BYD Sachigaro Wang Chuanfu panguva Hunan Shaoshan Sanji Engineering Work Conference, izvo zvakakonzera anokosha kuchengetedzwa mapepanhau, mawebhusaiti uye vamiririri, nyanzvi, uye anopfuura zana nhau muvhiki imwe chete. Mishumo yenhau dzekumba uye mazana ezvinyorwa zvakakwezvawo kutarisa kukuru kubva kumusika mukuru. Kuwanda kwesimba kuri kuwedzera here? Iyo lithium iron phosphate kana lithium iron manganese phosphate? Zvinhu zvichachinja here? Nechikonzero ichi, vezvenhau vakabvunzurudza Dr. Weifeng Fan, mutungamiriri wehunyanzvi weChengdu Xingneng New Materials Co., Ltd., Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences.

Lithium iron phosphate haisi nyaya yakakosha

yakaburitsa BYD’s tekinoroji nyowani lithium iron manganese phosphate bhatiri

Dr. Fan akataura kuti haisi lithium iron phosphate nemamwe marudzi esimbi ions, konitani phosphates, uye fetiraiza, ammonium dihydrogen phosphate, ammonium phosphate, etc.) zvakafanana, asi siyana solubility kuverenga, saka mumwe munhu Zvinganzi kushandiswa kwe lithium iron phosphate uye phosphorus fertilizer, asi chaizvoizvo, kunyunguduka kwe lithium iron phosphate kwakashata zvikuru uye haigoni kusunungura zvikamu zve phosphorus muvhu.

Fan anotenda kuti mapoka efosfate ndeeimwe mhando yepolyanionic compounds (polyanionic anode materials), nokuti mapoka efosfate ane maion okisijeni akawanda uye nzvimbo dzekubatanidza, uye anogona kazhinji kuumba steric polymer structure ine transition metal ions.

Polyanion imhando huru

yakaburitsa BYD’s tekinoroji nyowani lithium iron manganese phosphate bhatiri

Chiremba fan haina peak kukosha, M inomiririra yapfuura imwe simbi, manganese, cobalt, nickel, mhangura, chromium, senge chero chinhu chesimbi, M isimbi yepasi, chimiro chemakemikari, yakachengeteka kushandisa Kurume uye lithium ion chiteshi se lithium bhatiri Anode zvinhu, asi akasiyana simba, voltage, uye chiyero chekuita, hupenyu hwakasiyana…

Phosphoric acid, lithium iron manganese kana lithium iron manganese, handiti?

Dr. Weifeng Fan anotenda kuti chero chimiro chezita hachina kukosha. Chinokosha chiyero chesimbi kune manganese. Parizvino, hapana kubvumirana kwakajeka pazvinhu zvitatu zvakafanana (532, 111, 811, nezvimwewo). Mumamiriro ezvinhu api chiyero chesimbi kune manganese chinonyanya kukosha. Kugona? Nekuda kwekugadzikana kwayo kwakanaka uye kuita, iyo chaiyo yekushandisa mune ramangwana inogona kunge yakanyanya simbi yakaoma phosphates.

yakaburitsa BYD’s tekinoroji nyowani lithium iron manganese phosphate bhatiri

yakaburitsa BYD’s tekinoroji nyowani lithium iron manganese phosphate bhatiri

Huchokwadi hwehunyanzvi ichokwadi here?

Iyo theoretical chaiyo kugona kwelithium iron phosphate ndeye 170mAh/g, nzira yekuburitsa ndeye 3.4V, uye kusimba kwesimba rezvinhu i578Wh/kg. Iyo theoretical chaiyo kugona kwelithium manganese phosphate ndeye 171mAh/g, nzira yekuburitsa ndeye 4.1V, uye iyo material simba density i701Wh/kg, iri 21% yakakwirira kupfuura yekare.

Sekureva kwaDr. Fan Weifeng, muChinese bhatiri network, huwandu hwesimba hweiyo iripo lithium iron phosphate mabhatiri ndeye 90Wh/kg-130wh/kg. Zvinoenderana ne21% kuvandudzwa kwesimba remagetsi, kunyangwe yakachena lithium manganese phosphate, iyo simba density inogona kungosvika About 150Wh/kg, simba rekushandisa lithium manganese phosphate bhatiri rinongosvika pazasi pe150Wh/kg. Kutora lithium iron phosphate bhatiri semuenzaniso, kana iyo hypothetical best strategy (150Wh/kg) inofananidzwa neyazvino yakaipisisa zano (90Wh/kg), iyo yakanyanya kuvandudzwa inogona kufungidzirwa kuva 67%, asi zviri pachena kuti fungidziro iyi inogona kungo fungidziro .