Silicon-based cathodes inodzikamisa Li-S masero. Mhedzisiro: anopfuura maviri echaji kutenderera pane akati wandei gumi nemaviri

Masayendisiti kubva kuDaegu Institute of Science and Technology (DGIST, South Korea) vakagadzira silicon-based cathode inotarisirwa kumira kupfuura 2 kuchaja kutenderera muLi-S maseru. Classic lithium-ion maseru anoshandisa yakachena silicon mune anodes kuzadzisa uye zvishoma nezvishoma kutsiva graphite. Silicon oxide yakashandiswa pano, uye silicon dioxide yakashandiswa mu cathode.

Li-S sero = lithium anode, silicon dioxide cathode nesarufa

Maseru eLi-S anoonekwa seanonakidza nekuda kwekuwanda kwesimba, huremu, uye mutengo wakaderera wekugadzira. Nekudaro, kusvika parizvino hapana akakwanisa kugadzira vhezheni yakadai yaizomira kupfuura gumi nemaviri ekuchaja kutenderera. Zvose nekuda kwe lithium polysulfides (LiPS), iyo inonyunguduka mu electrolyte panguva yekubuda uye inopindirana neanode, kuderedza kukwanisa kwayo uye, sechikonzero, kuparadza bhatiri.

Zvinogoneka kuti vaongorori vekuSouth Korea vakawana mhinduro kudambudziko. Panzvimbo pekabhoni yakavakirwa zvinhu (senge graphite) ivo vakashandisa mune cathode. lamellar chimiro chemesoporous silica (POMS).

Iyo lamellar chimiro inonzwisiswa, nepo mesoporosity inoreva kuunganidzwa kwemapores (makavi) mu silica ine saizi yakarongwa, kusimba kwepamusoro, uye kupararira kudiki (mabviro). Zvakafanana kana uchigara uchiboora mahwendefa eimwe rudzi rwesilicate padivi peimwe kugadzira sefa.

DGIST masayendisiti akashandisa maburi aya kuisa sarufa maari (Mufananidzo a). Munguva yekubuda, sarufa inonyungudika uye inoita lithium polysulfides (LiPS) ine lithium. Nokudaro, mutero unoyerera, asi LiPS inoramba yakavharirwa pedyo nekathodhi nekuda kwekuwedzera kusingaverengeki kabhoni chinhu (dema chimiro, mufananidzo b).

Panguva yekuchaja, LiPS inoburitsa lithium, iyo inodzoserwa kune lithium anode. Kune rimwe divi, sarufa inopinda musilica. Hapana LiPS inodonha kune anode, hapana kukuvara kwesimbi.

Iyo Li-S bhatiri rakagadzirwa nenzira iyi rinochengeta hukuru hwepamusoro uye kugadzikana kweanopfuura maviri ekushanda kutenderera. Iyo yakajairwa yekirasi Li-ion maseru inoonekwa ingangoita 2-500 kutenderera kwekushanda, kunyangwe zvakakodzera kuwedzera kuti akabatwa zvakanaka lithium-ion maseru anogona kumira zviuru zvakati wandei kutenderera.