Babban aikace-aikacen ƙarfin kuzari

yayi nazarin iyawar ajiyar makamashi, dorewa da bayanan farashi na baturin. A halin yanzu, batirin lithium mafi girman ƙarfin kuzari yana amfani da lithium miƙewa ƙarfe ƙarfe oxide LiMo2 (M=Ni, Co da Mn ko Al) azaman bayanan ayyukan cathode (≈150? 200mahG-1 ingantaccen iya fitarwa) 1? Graphite (ka’idar takamaiman ƙarfin shine 372mahG-1) azaman bayanan ayyukan anode. Ƙara wani ɓangare na silicon (kimanin li15si4, 3579mahgsi? 1) ya tabbatar da zama ingantaccen dabara don ƙara haɓaka takamaiman makamashi. Misali, Yim et al. An yi amfani da bayanan da aka haɗa na graphite da silicon foda (5% wt%) don shirya da gwada polyvinyl imine adhesive anodes. Bayan hawan keke na 350, mafi inganci na lantarki yana da takamaiman ƙarfin 514 mahG-1, wanda shine sau 1.6 na nau’in graphite anodes, in ji marubucin. Koyaya, ƙare sake zagayowar aminci na babban abun ciki da siliki anodes masu ɗaukar nauyi yana da ƙalubale sosai. Mafi girman lahani na silicon a matsayin bayanan ayyukan anode sune: (I) babban rashin canzawa, musamman a cikin zagayowar farko biyu, kamar halayen gefe tare da electrolyte; (II) da lithium bayan alloying, ƙarar canjin yana da girma, wanda ya haifar da barbashi da fashewa da anode kai pulverizes.

Ya kamata a lura da cewa duk wadannan koma baya illa ba kawai haifar da babban tarawa na impedance a lokacin da baturi aiki, amma kuma haifar da deplete na cathode lithium. Bugu da kari, asarar tuntuɓar barbashi na silicon a cikin cibiyar sadarwar carbon baki/daure da/ko mai tarawa zai ƙara lalata ƙarfin aiki. A cikin ‘yan shekarun nan, an gwada sababbin da / ko ingantaccen electrolytes, additives da polymer binders don shawo kan manyan matsalolin silicon anodes. 11, 13, 15? 17 Bugu da ƙari, an mayar da hankali kan shirya ingantaccen bayanan ayyukan redox na tushen silicon. Ta fuskar wadannan karatun, kadan ne daga cikinsu ake la’akari a nan. Musamman, bayanan siliki da SiOx da bayanan da suka haɗa su, musamman nanoparticles na carbon, suna da fa’ida mai fa’ida a aikace-aikacen ajiyar makamashi na gaba. Misali, 18-21, Breitung et al. ya samar da wani abu mai haɗaka na barbashi na silicon da carbon nanofibers. Bayan ɗaruruwan zagayowar, ƙarfinsa ya kai kusan ninki biyu na na ainihin siliki barbashi lantarki. Sakamakon ya nuna cewa an inganta ƙarfin riƙe da ƙwayar siliki mai rufi na carbon bayan an shirya glucose ta hanyar hydrothermal. Ƙwararrun waɗannan karatun, manufar wannan binciken ita ce a yi amfani da ɓangarorin silicon da aka riga aka rufa da su don shirya abubuwan nano-si/C tare da tsarin harsashi mai mahimmanci. Electron microscopy, X-ray diffraction da Raman spectroscopy da aka yi amfani da su characterize da carbonized foda samfurori a 700 ~ 900 ℃. A cikin hanyar matsa lamba, an yi amfani da bambance-bambancen nau’ikan nau’ikan nau’ikan nau’ikan nau’ikan electrochemical da hanyar fitar da sauti don tantance girman haɓakar girma, halayen shigar ciki da nakasar injiniya/lalata halayen si/C ɗin abubuwan haɗaɗɗun ƙwayoyin lantarki akan ainihin lantarki.