High simba density applications

akaongorora simba rekuchengetedza simba, kusimba uye mutengo data yebhatiri. Parizvino, iyo yakanyanya yepamusoro-simba density lithium bhatiri inoshandisa akaturikidzana lithium transition metal oxide LiMo2 (M = Ni, Co uye Mn kana Al) se data cathode chiitiko (≈150? 200mahG-1 inoshanda yekuburitsa kugona) 1? Graphite (theoretical Iyo chaiyo kugona ndeye 372mahG-1) seanode chiitiko data. Kuwedzera chikamu chesilicon (inenge li15si4, 3579mahgsi? 1) yakaratidza kuve zano rinoshanda rekuwedzera simba chairo. Somuenzaniso, Yim et al. yakashandisa composite data yegraphite uye silicon poda (5% wt%) kugadzirira uye kuyedza polyvinyl imine adhesive anode. Mushure me 350 cycles, iyo inonyanya kushanda electrode ine chaiyo yehuwandu hwe514 mahG-1, iyo 1.6 nguva yekutengeserana graphite anodes, munyori akadaro. Nekudaro, kupedzisa kutenderera kwekuchengetedza kwepamusoro-yemukati uye yakakwira-mutoro silicon anode kunonetsa zvikuru. Kukanganisa kwakanyanya kwesilicon se data yeanode ndeye: (I) kusagadziriswa kwepamusoro, kunyanya mumatambo maviri ekutanga, akadai sekuita kweparutivi ne electrolyte; (II) uye lithiamu mushure mekusanganiswa, kushanduka kwevhoriyamu yakakura, zvichiita kuti The particles kuputika uye anode self-pulverizes.

Izvo zvinofanirwa kucherechedzwa kuti izvi zvese zvinodzosera mhedzisiro hazvingokonzerese kuunganidza kukuru kwe impedance panguva yekushanda kwebhatiri, asi zvakare kukonzeresa kupera kwe cathode lithium. Uye zvakare, kurasikirwa kwekusangana kwesilicon masisitimu mune conductive kabhoni dema / binder network uye / kana muunganidzi anomhanyisa kuderera kwesimba. Mumakore achangopfuura, matsva uye / kana akavandudzwa emagetsi, ekuwedzera uye mapolymer binder akaedzwa kuti akunde matambudziko makuru esilicon anode. 11, 13, 15? 17 Pamusoro pezvo, chinotariswa chiri pakugadzirira yakakwirira-mhando silicon-based redox chiitiko data. Kubva pamaonero ezvidzidzo izvi, vashoma chete ndivo vanotariswa pano. Kunyanya, silicon neSiOx data uye yavo inoumbwa data, kunyanya kabhoni nanoparticles, vane tarisiro yakakura mune ramangwana rekuchengetedza simba maapplication. Somuenzaniso, 18-21, Breitung et al. yakagadzira zvinhu zvakasanganiswa zvesilicon particles uye carbon nanofibers. Mushure memazana ekutenderera, huwandu hwayo hwaive hwakapetwa kaviri hwekutanga silicon particle electrode. Mhedzisiro yacho inoratidza kuti kuchengetwa kwekabhoni-yakavharwa silicon particles kunovandudzwa mushure mekunge glucose yagadzirwa nenzira yehydrothermal. Yakafuridzirwa nezvidzidzo izvi, chinangwa chechidzidzo ichi ndechekushandisa polymer pre-coated silicon particles kugadzirira nano-si / C composites ine core-shell structure. Electron microscopy, X-ray diffraction uye Raman spectroscopy zvakashandiswa kuratidza masampuli ehupfu hwekabhoni pa700 ~ 900 ℃. In situ pressure method, differential electrochemical mass spectrometry uye acoustic emission method yakashandiswa kuongorora kuwedzera kwevhoriyamu, kupinda mukati uye mechanical deformation/degradation behavior ye si/C composite particles pa electrode chaiyo.