Ama-Silicon anode adonse ukunaka okukhulu embonini yebhethri.Uma kuqhathaniswa neamabhethri e-lithium-ionusebenzisa ama-graphite anode, anganikeza amandla amakhulu izikhathi ezingu-3-5.Umthamo omkhulu usho ukuthi ibhethri lizohlala isikhathi eside ngemva kokushajwa ngakunye, okunganweba kakhulu ibanga lokushayela lezimoto zikagesi.Yize i-silicon iyiningi futhi ishibhile, imijikelezo yokushaja ye-Si anode inomkhawulo.Phakathi nomjikelezo wokukhipha imali ngayinye, umthamo wabo uzonwetshwa kakhulu, futhi ngisho namandla abo azokwehla, okuzoholela ekuqhekekeni kwezinhlayiya ze-electrode noma ukuchithwa kwefilimu ye-electrode.

Ithimba le-KAIST, eliholwa nguProfesa Jang Wook Choi kanye noProfesa Ali Coskun, libike ngo-20 Julayi i-adhesive ye-pulley ye-molecular umthamo omkhulu wamabhethri e-lithium ion ane-silicon anode.

Ithimba le-KAIST lihlanganise ama-pulleys amangqamuzana (abizwa ngokuthi ama-polyrotaxanes) kuzibophezelo zama-electrode ebhethri, okuhlanganisa nokwengeza ama-polymer kuma-electrode ebhethri ukuze anamathisele ama-electrode kuma-substrates ensimbi.Amaringi aku-polyrotane ajikijelwa kuhlaka lwamathambo e-polymer futhi akwazi ukuhamba ngokukhululeka eduze nohlaka lwamathambo.

Amasongo e-polyrotane angahamba ngokukhululeka ngokushintsha kwevolumu yezinhlayiya ze-silicon.I-slip of rings ingagcina ngempumelelo ukuma kwezinhlayiya ze-silicon, ukuze zingahlakaki enqubweni yokushintsha ivolumu eqhubekayo.Kuyaphawuleka ukuthi ngisho nezinhlayiya ze-silicon ezichotshoziwe zingahlala zihlangene ngenxa yokunwebeka okuphezulu kwe-polyrotane adhesives.Umsebenzi wezinamatheliso ezintsha uhluke kakhulu kulowo wezinto ezinamathelayo ezikhona (imvamisa ama-polymer aqondile alula).Izinamathiselo ezikhona zinokunwebeka okulinganiselwe ngakho-ke azikwazi ukugcina ngokuqinile ukuma kwezinhlayiyana.Izinamathiselo zangaphambili zingasakaza izinhlayiya ezichotshoziwe futhi zinciphise noma zilahlekelwe amandla ama-silicon electrode.

Umbhali ukholelwa ukuthi lokhu kuwukubonakaliswa okuhle kakhulu kokubaluleka kocwaningo oluyisisekelo.I-Polyrotaxane iwine uMklomelo KaNobel ngonyaka odlule ngomqondo “we-mechanical bond”."Ukubopha ngomshini" umqondo osanda kuchazwa ongangezwa kumabhondi amakhemikhali angajwayelekile, njengamabhondi e-covalent, amabhondi e-ionic, amabhondi okuxhumana namabhondi ensimbi.Ucwaningo oluyisisekelo lwesikhathi eside kancane kancane lubhekana nezinselelo zesikhathi eside zobuchwepheshe bebhethri ngenani elingalindelekile.Ababhali baphinde basho ukuthi njengamanje basebenza nomkhiqizi omkhulu webhethri ukuhlanganisa ama-pulleys abo e-molecular emikhiqizweni yebhethri yangempela.

USir Fraser Stoddart, owawina ngo-2006 Noble Laureate Chemistry Award eNorthwestern University, wengeza: “Amabhondi emishini aseluleme okokuqala ngqa endaweni yokugcina amandla.Ithimba le-KAIST lasebenzisa ngobuchule izibophezelo zomshini kuma-polyrotaxanes e-slip-ring kanye ne-alpha-cyclodextrin spiral polyethylene glycol esebenza kahle, okumaka impumelelo ekusebenzeni kwamabhethri e-lithium-ion emakethe, lapho izilinganiso ezimise okwepulley zinezibophezelo zomshini.Amakhompiyutha athatha indawo yezinto ezijwayelekile ngesibopho samakhemikhali esisodwa kuphela, esizoba nomthelela omkhulu ezimpahleni zezinto zokwakha namathuluzi.