Ama-silicon anode adonsele ukunaka okukhulu embonini yamabhethri. Uma kuqhathaniswaamabhethri e-lithium-ionbesebenzisa ama-anode e-graphite, banganikeza umthamo omkhulu ngokuphindwe ka-3-5. Umthamo omkhulu usho ukuthi ibhethri lizohlala isikhathi eside ngemva kokushaja ngakunye, okungandisa kakhulu ibanga lokushayela kwezimoto zikagesi. Nakuba i-silicon iningi futhi ishibhile, imijikelezo yokushaja nokukhipha i-Si anode inqunyelwe. Phakathi nomjikelezo ngamunye wokushaja nokukhipha i-charge, ivolumu yazo izokwandiswa kakhulu, futhi ngisho nomthamo wazo uzokwehla, okuzoholela ekuqhekekeni kwezinhlayiya ze-electrode noma ekuhlukaniseni ifilimu ye-electrode.

Ithimba le-KAIST, eliholwa nguSolwazi uJang Wook Choi noSolwazi u-Ali Coskun, libike ngomhlaka-20 kuJulayi nge-glue pulley adhesive yamabhethri e-lithium ion amakhulu anama-silicon anode.

Ithimba le-KAIST lihlanganise ama-pulley ama-molecule (abizwa ngokuthi ama-polyrotaxanes) kuma-binder e-electrode ebhethri, okuhlanganisa nokufaka ama-polymer kuma-electrode ebhethri ukuze anamathisele ama-electrode kuma-substrates ensimbi. Amasongo aku-polyrotane afakwe ku-skeleton ye-polymer futhi angahamba ngokukhululeka eceleni kwe-skeleton.

Amasongo aku-polyrotane angahamba ngokukhululeka ngokushintsha kwevolumu yezinhlayiya ze-silicon. Ukushelela kwezingcezu kungagcina isimo sezinhlayiya ze-silicon ngempumelelo, ukuze zingaqhekeki enqubweni yokushintsha ivolumu eqhubekayo. Kuyaphawuleka ukuthi ngisho nezinhlayiya ze-silicon ezichotshoziwe zingahlala zifana ngenxa yokuqina okuphezulu kwezinhlayiya ze-polyrotane. Umsebenzi wezinhlayiya ezintsha uphambene kakhulu nowezinhlayiya ezikhona (ngokuvamile ama-polymer alula aqondile). Izinhlayiya ezikhona zinokuqina okulinganiselwe ngakho-ke azikwazi ukugcina isimo sezinhlayiya ngokuqinile. Izinhlayiya zangaphambilini zingasakaza izinhlayiya ezichotshoziwe futhi zinciphise noma zilahlekelwe amandla e-electrode ye-silicon.

Umbhali ukholelwa ukuthi lokhu kuyisibonakaliso esihle kakhulu sokubaluleka kocwaningo oluyisisekelo. I-Polyrotaxane iwine umklomelo weNobel ngonyaka odlule ngomqondo "wezibopho zemishini". "Ukubopha kwemishini" umqondo omusha ochazwe ongangezwa ezibophweni zamakhemikhali zakudala, njengezibopho ze-covalent, izibopho ze-ionic, izibopho zokuxhumanisa kanye nezibopho zensimbi. Ucwaningo oluyisisekelo lwesikhathi eside lubhekana kancane kancane nezinselele zobuchwepheshe bebhethri ngesivinini esingalindelekile. Ababhali baphinde basho ukuthi okwamanje basebenzisana nomkhiqizi webhethri omkhulu ukuhlanganisa ama-pulleys abo e-molecular emikhiqizweni yebhethri yangempela.

USir Fraser Stoddart, owine i-Noble Laureate Chemistry Award ka-2006 eNorthwestern University, wanezela: “Amabhondi omshini aphinde alulama okokuqala endaweni yokugcina amandla. Ithimba le-KAIST lisebenzise ngobuchule ama-mechanical binders kuma-slip-ring polyrotaxanes kanye ne-functionalized alpha-cyclodextrin spiral polyethylene glycol, okubonisa intuthuko ekusebenzeni kwamabhethri e-lithium-ion emakethe, lapho kuhlanganiswa khona ama-pulley nama-mechanical binders. Ama-compound athatha indawo yezinto ezivamile ngebhondi elilodwa lamakhemikhali, elizoba nomthelela omkhulu ezimpahleni zezinto kanye nemishini.