Musi wa21 Aug, Prof. MA Cheng vekuYunivhesiti yeSainzi neTekinoroji yekuChina (USTC) nevamwe vake vakaronga zano rinoshanda rekugadzirisa nyaya ye electrode-electrolyte contact iyo iri kutadzisa kugadzirwa kwemabhatiri eLi-igh-state anotevera. Iyo solid-solid composite electrode yakagadzirwa nenzira iyi yakaratidza kugona kwakasiyana uye chiyero chekuita.
Kutsiva iyo organic fluid electrolyte mumabhatiri eLi-ion ane akasimba emagetsi anogona kurerutsa zvakanyanya nyaya dzekuchengetedza, uye zvinogona kupaza "sirin'i yegirazi" yekuvandudza density yesimba. Nekudaro, mainstream electrode zvinhu zvakare zvakaonda. Sezvo kusangana pakati pezvakaoma zviviri kunenge kusingagoneki kuve yepedyo sepakati peiyo yakasimba uye yemvura, parizvino mabhatiri akavakirwa pane akasimba maelectrolyte anowanzo ratidza kusabatana kwe electrode-electrolyte uye kusagutsikana kwesero yakazara.
"Iyo electrode-electrolyte contact issue yemabhatiri ehurumende yakasimba yakangofanana nepfupi pfupi yedanda rehuni," akadaro Prof. MA Cheng kubva kuUSTC, munyori anotungamirira wekudzidza. "Chaizvoizvo, mumakore aya vaongorori vakatogadzira akawanda emagetsi emhando yepamusoro uye akasimba emagetsi, asi kusabatana kwakashata pakati pavo kuchiri kudzikisira kushanda kweLi-ion kutakura."
Neraki, zano reMA rinogona kukunda dambudziko iri rinotyisa. Chidzidzo chakatanga nekuongororwa kweatomu-ne-atomu kwechikamu chekusachena mune prototype, perovskite-yakarongeka yakasimba electrolyte. Kunyangwe chimiro chekristaro chakasiyana zvakanyanya pakati pekusachena uye yakasimba electrolyte, ivo vakaonekwa kuti vagadzire epitaxial interfaces. Mushure mekutevedzana kwakadzama kwekuongorora kwemaitiro uye kemikari, vaongorori vakawana kuti chikamu chekusachena chakasarudzika neakakwira-capacity Li-rich layered electrodes. Izvi zvinoreva kuti, prototype yakasimba electrolyte inogona kupenya pa "template" inoumbwa neatomu yeatomu yepamusoro-soro ye electrode, zvichiita kuti atomu yepedyo yepakati.
"Izvi zvinoshamisa zvechokwadi," akadaro munyori wekutanga LI Fuzhen, parizvino ari mudzidzi akapedza kudzidza weUSTC. “Kuvapo kwetsvina muzvinhu zvacho chinhu chakajairika, chakajairika zvekuti nguva zhinji havazotarisirwi.” Zvisinei, mushure mokunyatsoongorora, takawana iyi hunhu husingatarisiri hwe epitaxial, uye zvakakurudzira zvakananga zano redu rekuvandudza kubatana kwakasimba.
Zvichienzaniswa neanowanzo shandiswa kutonhora-kutsikirira nzira, zano rakatsanangurwa nevatsvaguri rinogona kuona kubatana, kusina musono pakati peakasimba maelectrolyte nemaelectrode paatomu sikero, sezvinoratidzwa mumufananidzo weatomic-resolution electron microscopy. （Inopihwa nechikwata cheMA.)
Vachitora mukana wechiitiko chakaonekwa, vatsvakurudzi vakanatsa nemaune hupfu hweamorphous neine kuumbwa kwakafanana ne perovskite-yakarongeka yakasimba electrolyte pamusoro peLi-rich layered compound, uye vakabudirira kuona kuwirirana, kusina musono pakati pezvinhu zviviri izvi zvakasimba mu electrode inoumbwa. Ne electrode-electrolyte contact issue yakagadziriswa, yakadaro solid-solid composite electrode yakaunza chiyero chekugona kuenzana neiyo kubva kune yakasimba-mvura inoumba electrode. Zvinotonyanya kukosha ndezvokuti vatsvakurudzi vakawanawo iyi mhando ye epitaxial solid-solid contact inogona kushivirira misiyano mikuru yelatisi, uye nekudaro zano ravakaronga rinogona kushanda kune mamwe akawanda perovskite akasimba emagetsi uye akaturikidzana maelectrode.
"Basa iri rakaratidza gwara rakakodzera kuteverwa," MA akadaro. “Kushandisa chirevo chasimudzwa pano kune zvimwe zvinhu zvakakosha kunogona kuita kuti masero atove nani uye nesainzi inonakidza. Tiri kutarisira kwazviri.”
Vatsvakurudzi vanotarisira kuenderera mberi nekuongorora kwavo mune iyi nzira, uye voshandisa nzira yakarongwa kune mamwe makuru-akakwirira, makuru-anogona cathodes.
Chidzidzo ichi chakabudiswa paMatter, chinyorwa chemureza cheCell Press, chakanzi "Atomically Intimate Contact pakati peSolid Electrolytes neElectrodes yeLi Batteries". Munyori wekutanga ndiLI Fuzhen, mudzidzi akapedza kudzidza weUSTC. Vabatsiri vaProf MA Cheng vanosanganisira Prof. NAN Ce-Wen vekuTsinghua University naDr. ZHOU Lin vanobva kuAmes Laboratory.
(Chikoro cheChemistry uye Material Sayenzi)
Pepa link: https://www.cell.com/matter/fulltext/S2590-2385(19)30029-3
Nguva yekutumira: Jun-03-2019