Kune akawanda tekinoroji zviratidzo zve graphite anode zvinhu, uye zvakaoma kufunga, kunyanya kusanganisira chaiyo nzvimbo, particle size distribution, tap density, compaction density, true density, yekutanga kuchaja uye kuburitsa chaiyo kugona, kutanga kunyatsoita, nezvimwe. Mukuwedzera, kune zviratidzo zve electrochemical zvakadai sekuita kutenderera, chiyero chekuita, kuzvimba, nezvimwe zvakadaro.Saka, ndezvipi zviratidzo zvekuita zvegraphite anode zvinhu?Izvi zvinotevera zvinounzwa kwauri neHCMilling (Guilin Hongcheng), mugadziri weiyoanode zvinhu kugaya.

01 chaiyo nzvimbo

Zvinoreva pamusoro penzvimbo yechinhu pachiyero cheuniti.Iyo diki diki, iyo yakakura iyo chaiyo nzvimbo.

Iyo yakaipa electrode ine zvidimbu zvidiki uye yakakwira chaiyo nzvimbo ine mamwe machaneli uye mapfupi nzira dzekutama kwe lithium ion, uye chiyero chekuita chiri nani.Zvisinei, nekuda kwenzvimbo huru yekubatana ne electrolyte, nzvimbo yekugadzira firimu yeSEI yakakurawo, uye kushanda kwekutanga kuchavawo kwakaderera..Zvimedu zvakakura, kune rumwe rutivi, zvine mukana wekukura kukuru kwekubatana.

Iyo chaiyo nzvimbo ye graphite anode zvinhu zviri nani isingasviki 5m2/g.

02 Particle size distribution

Iko kurudziro yehukuru hwe graphite anode zvinhu pakuita kwayo kwe electrochemical ndeyekuti saizi yechikamu cheanode inozokanganisa zvakananga tepi density yechinhu uye chaiyo nzvimbo yechinhu.

Saizi yepombi density inozokanganisa vhoriyamu simba density yechinhu, uye chete yakakodzera particle size kugovera kwechinyorwa kunogona kuwedzera kushanda kwechinhu.

03 Tap Density

Iyo tepi density ndiyo misa pavhoriyamu yevhoriyamu yakayerwa nekuzunguza kunoita kuti hupfu huoneke muchimiro chakati twii pakurongedza.Icho chiratidzo chakakosha chekuyera zvinhu zvinoshanda.Huwandu hwebhatiri ye lithium-ion ishoma.Kana iyo density yepombi yakakwira, iyo inoshanda zvinhu pavhoriyamu yevhoriyamu ine hukuru hukuru, uye huwandu hwevhoriyamu hwakakwira.

04 Compaction Density

Iyo compaction density inonyanya kuitirwa chidimbu chepole, iyo inoreva density mushure mekukunguruka mushure meiyo negative electrode inoshanda zvinhu uye binder inogadzirwa kuita chidimbu chedanda, compaction density = nzvimbo density / (ukobvu hwedanda mushure mekukunguruka. ukobvu hwemhangura foil).

Iyo compaction density yakanyatso hukama neiyo sheet chaiyo kugona, kunyatsoita, yemukati kuramba uye bhatiri kutenderera kuita.

Kufurira zvinhu zve compaction density: saizi yechidimbu, kugovera uye morphology zvese zvine chekuita.

05 Chokwadi Density

Huremu hwechinhu chakasimba pavhoriyamu yevhoriyamu yechinhu chiri mukuwomba chose (kusingasanganisire mukati ma voids).

Sezvo density yechokwadi ichiyerwa muchimiro chakabatana, ichave yakakwirira kupfuura iyo tapped density.Kazhinji, density yechokwadi> compacted density> tapped density.

06 Yekutanga kuchaja uye kuburitsa chaiyo huwandu

Iyo graphite anode zvinhu zvine simba risingadzoreki mukutanga kuchaja-kuburitsa kutenderera.Panguva yekutanga kuchaja bhatiri relithium-ion, nzvimbo yeanode zvinhu inopindirana nelithium ions uye mamorekuru anonyungudutsa ari muelectrolyte anoiswa pamwe chete, uye pamusoro peanode zvinhu zvinowora kuita SEI.Passivation firimu.Chete mushure mekunge iyo yakaipa electrode yepamusoro yakavharwa zvachose neSEI firimu, mamorekuru ekunyungudutsa aisagona kupindirana, uye mhinduro yakamiswa.Chizvarwa cheSEI firimu chinodya chikamu che lithium ions, uye chikamu ichi che lithium ions haigoni kubviswa kubva pamusoro peiyo negative electrode panguva yekubuda, nokudaro zvichikonzera kurasikirwa kwesimba kusingadzoreki, nekudaro kuderedza huwandu hwakananga hwekubuda kwekutanga.

07 Kutanga Coulomb Kubudirira

Chiratidzo chakakosha chekuongorora mashandiro eanode zvinhu ndeyekutanga kuchaja-kuburitsa kushanda zvakanaka, inozivikanwawo seyekutanga Coulomb kunyatsoshanda.Kwenguva yekutanga, kushanda kweCoulombic kunogadzirisa zvakananga kushanda kwezvinhu zve electrode.

Sezvo firimu reSEI rinonyanya kuumbwa pamusoro pechinhu che electrode, iyo chaiyo nzvimbo ye electrode zvinhu inobata zvakananga nzvimbo yekugadzira yeSEI firimu.Iyo yakakura iyo chaiyo nzvimbo, iyo yakakura nzvimbo yekusangana ine electrolyte uye yakakura nzvimbo yekugadzira iyo SEI firimu.

Zvinowanzotendwa kuti kuumbwa kwefirimu yakagadzikana yeSEI kunobatsira pakuchaja uye kuburitsa bhatiri, uye iyo isina kugadzikana SEI firimu haina kunaka pakuita, iyo icharamba ichidya electrolyte, kuomesa ukobvu hweSEI firimu, uye kuwedzera kupikisa kwemukati.

08 Cycle performance

Kutenderera kwebhatiri kunoreva kuwanda kwekuchaji uye kuburitswa kunoitwa nebhatiri pasi peimwe kuchaji uye kubuda kwehutongi kana huwandu hwebhatiri hwadzikira kusvika pane yakatarwa.Panyaya yekuita kutenderera, iyo SEI firimu inotadzisa kupararira kwe lithium ions kune imwe nhanho.Sezvo huwandu hwemagetsi hunowedzera, iyo SEI firimu icharamba ichidonha, kupepeta, uye kuisa pamusoro peiyo negative electrode, zvichikonzera kuwedzera zvishoma nezvishoma mukupikisa kwemukati kweiyo negative electrode, iyo inounza kupisa Kuunganidza uye kurasikirwa kwesimba. .

09 Kuwedzera

Pane hukama hwakanaka pakati pekuwedzera uye hupenyu hwekutenderera.Mushure mokunge electrode yakaipa ichiwedzera, kutanga, iyo inotenderera inoputika ichave yakaremara, iyo yakaipa electrode particles ichaita micro-cracks, iyo SEI firimu ichaputswa uye kurongekazve, iyo electrolyte ichapedzwa, uye kutenderera kwekuita kuchave kwakashata;chechipiri, diaphragm ichasvinwa.Dzvinyiriro, kunyanya kuputika kwediaphragm kumucheto-kurudyi wepakona nzeve, yakakomba zvikuru, uye zviri nyore kukonzera micro-short circuit kana micro-metal lithium precipitation nekufambira mberi kwechaji-discharge cycle.

Nekuda kwekuwedzera kwayo pachayo, lithium ions ichaiswa mu graphite interlayer spacing panguva ye graphite intercalation process, zvichikonzera kuwedzera kwe interlayer spacing uye kuwedzera kwehuwandu.Ichi chikamu chekuwedzera hachichinjiki.Kuwanda kwekuwedzera kwakabatana nehuwandu hwekutarisa kwe electrode yakaipa, chiyero chekutarisa = I004 / I110, iyo inogona kuverengwa kubva ku data ye XRD.Iyo anisotropic graphite material inowanzoita kuwedzera lattice nenzira imwechete (iyo C-axis kutungamira kwe graphite crystal) panguva ye lithium intercalation process, izvo zvichaita kuti vhoriyamu iwedzere kuwedzera kwebhatiri.

10Rate performance

Kupararira kwe lithium ions mu graphite anode zvinhu kune hutungamiri hwakasimba, kureva, inogona kuiswa chete perpendicular kusvika kumagumo eC-axis ye graphite crystal.Iwo anode zvinhu zvine zvidimbu zvidiki uye yakakwira chaiyo nzvimbo ine chiyero chirinani kuita.Mukuwedzera, iyo electrode surface resistance (nekuda kweiyo SEI firimu) uye electrode conductivity inokanganisawo chiyero chekuita.

Zvakafanana nehupenyu hwekutenderera uye kuwedzera, iyo isotropic negative electrode ine akawanda lithium ion transport channels, iyo inogadzirisa matambudziko ekupinza mashoma uye yakaderera kupararira mazinga mune anisotropic chimiro.Zvizhinji zvezvishandiso zvinoshandisa matekinoroji senge granulation uye coating kuti vavandudze mashandiro avo.

HCMilling(Guilin Hongcheng) inogadzira anode zvinhu zvekukuya chigayo.HLMX seriesanode zvinhu super-fine vertical mill, HCHanode zvinhu ultra-fine milluye mamwe magirafu ekukuya anogadzirwa nesu ave achishandiswa zvakanyanya mukugadzira graphite anode zvinhu.Kana uine zvaunoda, ndapota taura nesu kuti uwane ruzivo rwemidziyo uye tipe ruzivo rwekutevera kwatiri:

Raw material zita

Kunaka kwechigadzirwa (mesh/μm)

kugona (t/h)