Ubuchwepheshe Bebhethri Besikhathi Esizayo: Yini Ongayilindela?
Amabhethri asephenduke “izinjini ezingabonakali” ezinika amandla impilo yanamuhla. Kusukela kumafoni esiwaphethe ezandleni zethu, kuya kuma-laptop esiwasebenzisela umsebenzi, kuya ezimotweni zikagesi ezivame kakhulu emigwaqweni yethu, konke kuncike emandleni amabhethri okugcina nokuletha amandla ngokuphephile. Kodwa-ke, izidingo zamandla zanamuhla zikhula ngokushesha kunamakhono amabhethri avamile. Ngakho-ke, ucwaningo lwamabhethri luye lwashesha ngokushesha eminyakeni eyishumi edlule—hhayi nje ukwenza amabhethri abe makhulu, kodwa futhi nokuwenza asheshe ukushaja, ahlale isikhathi eside, aphephe, futhi abe nobungane nemvelo. Ngakho-ke, ikusasa lobuchwepheshe bebhethri lizobukeka kanjani, futhi yini engokoqobo ongayilindela?
Kungani sidinga isizukulwane esisha samabhethri?
Amadivayisi amaningi namuhla asebenzisa amabhethri e-lithium-ion (Li-ion). Lobu buchwepheshe buphumelele ngenxa yobuningi bamandla aphezulu, ikhono lokushaja kabusha izikhathi ezingamakhulu noma izinkulungwane, kanye nezindleko zokukhiqiza ezincipha kancane kancane. Kodwa-ke, i-Li-ion inemikhawulo: izinto zayo zokusetshenziswa (njenge-nickel, i-cobalt, ne-graphite) zinezintambo zokuhlinzeka eziyinkimbinkimbi; ukushaja okusheshayo kungasheshisa ukuwohloka; ingozi "yokubaleka kokushisa" isalokhu ikhona naphezu kwezinhlelo zokuphatha eziyinkimbinkimbi kakhulu; futhi amandla ayo athile asondela emkhawulweni wethiyori wemiklamo ethile.
Ngakolunye uhlangothi, ukufakwa kukagesi kwezokuthutha kanye nesidingo sokugcina amandla egridi kudinga amabhethri ashibhile nge-kilowatt-hora, aphephile ukuthunyelwa ngezinga elikhulu, akwazi ukusebenza ebangeni lokushisa elibanzi, futhi anganciki ezintweni ezingavamile noma eziyinkinga yezenhlalo nezemvelo. Lokhu kuqhuba ukuvela kwezindlela ezahlukene zamabhethri esizukulwane esisha.
1) Ibhethri lesimo esiqinile: isithembiso sokuphepha kanye nobuningi bamandla
Enye yezinto ezikhulunywa kakhulu ngayo ibhethri le-solid-state, elithatha indawo ye-electrolyte ewuketshezi (njengakwi-Li-ion) nge-electrolyte eqinile. Ngokwethiyori, i-electrolyte eqinile inganciphisa ingozi yomlilo, ivumele ukusetshenziswa kwama-anode ensimbi ye-lithium (okungase kwandise ubuningi bamandla), futhi kwandise ububanzi bokushisa kokusebenza.
Kodwa-ke, izinselele zibalulekile. Ukukhiqiza isixhumi esiqinile nesiqinile phakathi kwama-electrode kanye ne-electrolyte kuyinkimbinkimbi: ukumelana kokuthintana kungalimaza ukusebenza, futhi ukwakheka kwama-dendrites (izakhiwo ezifana nenaliti ezingangena ku-electrolyte) kusalokhu kuyinkinga kweminye imiklamo. Ngaphezu kwalokho, ukukhiqizwa okukhulu kwe-solid-state kudinga izinqubo ezintsha, imishini emisha, kanye nokulawulwa kwekhwalithi okuqinile. Eminyakeni embalwa ezayo, singase sibone amadivayisi e-solid-state eqala ukubonakala ezinhlelweni zokusebenza eziphezulu noma ezilinganiselwe, ngaphambi kokuba abe yinto evamile ngempela.
Ongakulindela: amabhethri aphephile futhi angaba lula ezimotweni zikagesi, kodwa ukusetshenziswa kabanzi kungenzeka kube kancane kancane—kuqala ngokukhiqiza okulinganiselwe futhi kwande njengoba ukukhiqiza kuvuthwa.
2) I-Lithium-sulfur: amandla aphezulu anempilo elinganiselwe
Amabhethri e-Lithium-sulfur (Li-S) ayakhanga ngoba isibabule siningi futhi asibizi, futhi ngokombono anikeza amandla amaningi kune-Li-ion. Lokhu kwenza i-Li-S ikhange ezinhlelweni ezithinta isisindo njengezindiza ezisebenzisa ama-drone, izindiza ezilula, noma amadivayisi akhethekile.
Inkinga enkulu nge-Li-S ukuwohloka. Kukhona into ebizwa ngokuthi "i-polysulfide shuttle," lapho ama-compounds encibilika futhi ehambahamba khona, okubangela ukulahlekelwa kwamandla nokusebenza kahle. Ngaphezu kwalokho, izinguquko kumthamo wezinto ezibonakalayo ngesikhathi somjikelezo wokushaja/wokukhipha amandla zibangela ukuthi isakhiwo se-electrode sonakale ngokushesha.
Okufanele ukulindele: I-Li-S ingase ivele kuqala ezimakethe ezikude ezidinga isisindo esincane, kuyilapho izimoto zikagesi ezimakethe ezinkulu zisalinde intuthuko ekuzinzeni komjikelezo.
3) I-Sodium-ion: izindleko eziphansi kanye nokuqina kochungechunge lokuhlinzeka
Njengoba i-lithium iba yimpahla ebaluleke kakhulu, ukunakwa kuye kwashintshela kumabhethri e-sodium-ion (Na-ion). I-sodium iningi kakhulu kune-lithium futhi isakazwa kabanzi, okwenza ikhange ekunciphiseni izindleko kanye nokunciphisa izingozi zokuhlinzekwa. I-Na-ion nayo ingafaneleka ezindaweni zokugcina amandla ezimile kanye nezimoto zikagesi eziphakathi nendawo.
Okubi: I-Na-ion ngokuvamile inomthamo wamandla ophansi kune-Li-ion. Lokhu kusho ukuthi ngebanga elifanayo, ibhethri lingaba likhulu noma libe nzima kakhulu. Kodwa-ke, kwezinye izinhlelo zokusebenza—njengezimoto zasemadolobheni, izithuthuthu zikagesi, noma amabhethri egridi—lokhu kushintshana kuyamukeleka ngoba izindleko nokuphepha kubaluleke kakhulu.
Okufanele ukulindele: I-Na-ion ikhula ngokushesha ezigabeni ezibucayi, futhi ingaba yisengezo se-Li-ion, hhayi indawo ephelele.
4) Ukuvela kwe-LFP kanye ne-Li-ion: ukusungula izinto ezintsha akusho njalo ukuthi “uhlobo olusha”
Ikusasa lamabhethri alisho ukuthi kuzoshintshwa ngokuphelele ama-chemistry. Ngisho nanamuhla, intuthuko eminingi ivela ekuthuthukisweni kwe-Li-ion. Isibonelo esibalulekile yi-lithium iron phosphate (LFP): iphephile, ayivimbeli umjikelezo, futhi ngokuvamile ishibhile ngoba ayisebenzisi i-nickel ne-cobalt. Inkinga ukuthi amandla aphansi uma kuqhathaniswa ne-NMC/NCA (ama-chemical asekelwe ku-nickel). Kodwa-ke, ukulungiswa komklamo wamaphakethe, i-aerodynamics yezimoto, kanye nokusebenza kahle kwezimoto kusiza ukuvala igebe.
Ngaphandle kwe-LFP, kunezinye intuthuko ezifana nalezi:
– Ama-silicon anode okwandisa amandla (yize izinselele zokuthuthukiswa komthamo zisenkulu).
– Izithasiselo ze-Electrolyte zokwandisa impilo yesevisi kanye nokushaja okusheshayo.
– Ukwakheka kweseli kuya ephaketheni/iseli kuya emzimbeni ukuze kuncishiswe izingxenye futhi kwandiswe ukusebenza kahle kwesikhala.
Okufanele ukulindele: ukuthuthuka kancane kancane kodwa okuphawulekayo ku-Li-ion kuzoqhubeka, futhi cishe kuzobusa imakethe iminyaka eyishumi ezayo ngisho noma ubuchwepheshe obusha buqala ukungena emakethe.
5) Ukushaja okusheshayo kakhulu: akukhona nje "ngokushaja okukhulu"
Abantu abaningi bacabanga ngekusasa lamabhethri njengokushaja kwemizuzu emi-5-10 kwezimoto zikagesi. Kungenzeka, kodwa kuyinkimbinkimbi. Ukushaja okusheshayo kuncike ezintweni eziningi: ikhemikhali yebhethri, ukuphathwa kwezinga lokushisa, ukwakheka kwe-electrode, kanye namakhono egridi. Ukushaja ngokweqile kwandisa ingozi yokufakwa kwe-lithium futhi kunciphisa impilo yebhethri.
Izixazululo zifaka phakathi amabhethri amelana kakhulu nemisinga ephezulu, izinhlelo zokupholisa eziqinile, ama-algorithms okushaja ahlakaniphile (amaphrofayili wamandla kagesi aguquguqukayo), kanye nengqalasizinda kagesi ekwazi ukusingatha imithwalo ephezulu. Sizobona nokuhlanganiswa kokulungiswa kwebhethri kusengaphambili: ibhethri liyashiswa noma lipholiswe lifike ezingeni lokushisa elifanele ngaphambi kokuqala ukushaja okusheshayo.
Okufanele ukulindele: izikhathi zokushaja zizothuthuka kakhulu, kodwa izimangalo zokuthi “zishesha njengethangi likaphethiloli” cishe zizoba yisici sezimo ezithile nezimoto, kunokuba kube yindinganiso evamile maduze.
6) Ukuvuselela kanye "nokuphila kwesibili": amabhethri njengomjikelezo wezomnotho
Ibhethri lesikhathi esizayo aligcini nje ngokusebenza kahle, kodwa futhi limayelana nokusimama. Kunezindlela ezimbili ezinkulu lapha:
1. Ukuvuselelwa kwezinto: ukubuyiswa kwe-lithium, i-nickel, i-cobalt, ithusi, i-aluminium, ne-graphite ukuze kuncishiswe isidingo sezimayini ezintsha. Izinqubo zokusebenzisa kabusha i-hydrometallurgy kanye nokuvuselelwa kabusha okuqondile zihlala zithuthukiswa ukuze zisebenze kahle futhi zonge imali.
2. Impilo yesibili: Amabhethri ezimoto zikagesi anciphile ngomthamo (isb., kuya ku-70–80%) angase afanelekele ukugcina amandla angashintshi, njengokusekela ekhaya, ukusetshenziswa kwezimboni, noma ukulinganisela amandla elanga. Lokhu kwandisa inani lebhethri elingabizi ngaphambi kokuba liphinde lisetshenziswe.
Okufanele ukulindele: imithethonqubo izofuna kakhulu ukunyatheliswa kwekhabhoni kanye nokucaca kochungechunge lokuhlinzeka, ngakho-ke ukuphinda kusetshenziswe kabusha kuzoba yingxenye ebalulekile yomkhakha, hhayi nje inketho.
7) Amabhethri egridi: izidingo ezahlukene, abawinile abahlukene
Kugridi yamandla, okubalulekile ngokuvamile akusikho ubuningi bamandla ngekhilogramu, kodwa izindleko nge-kWh, impilo yomjikelezo, ukuphepha, kanye nokulula kokugcinwa. Kulesi sigaba, ubuchwepheshe obufana ne-sodium-ion, amabhethri okugeleza (isb., i-vanadium redox), noma ngisho namabhethri asekelwe ku-zinc ne-iron angathola indawo.
Amabhethri okugeleza, isibonelo, asebenza kahle kakhulu ngesikhathi eside sokugcina kanye nokuphila komjikelezo ophezulu ngoba amandla agcinwa kuma-electrolyte ematangini ahlukene. Kodwa-ke, ubukhulu bawo kanye nezindleko zawo kuwenza afaneleke kakhulu ekufakweni okumile.
Ongakulindela: kuzoba nokwehlukahlukana—izinhlobo eziningi zamabhethri ezihlala ndawonye ngokomsebenzi, hhayi eyodwa ewinayo kubo bonke.
Yini esingayilindela ngempela?
Ngamafuphi, ubuchwepheshe bebhethri besikhathi esizayo cishe buzohamba ngezindlela ezintathu ezibanzi: kuphephile, kushibhile, futhi kuqhubeke isikhathi eside, kuyilapho kulandelwa imigomo yokusebenza efana nobubanzi kanye nokushaja okusheshayo. Esikhathini esiphakathi, i-Li-ion (kufaka phakathi i-LFP kanye nezinhlobo ze-nickel ephezulu) isalokhu ihola phambili, njengoba uhlelo lwayo lokukhiqiza seluvuthiwe. Kodwa-ke, i-sodium-ion inamandla okugcwalisa ingxenye engabizi kakhulu, kuyilapho i-solid-state iyindlela yokuthola izimoto zekhwalithi ephezulu noma izidingo ezikhethekile uma izinselelo zokukhiqiza sezinqotshiwe.
Kubathengi, ushintsho oluphawuleka kakhulu kungenzeka kungabi yindlela yokusebenzisa ibhethri esetshenzisiwe, kodwa ulwazi: izimoto zikagesi ezingabizi kakhulu, ukushaja okusheshayo nokuqhubekayo, impilo yebhethri ende, kanye nomuzwa wokuvikeleka okukhulu. Embonini nakuhulumeni, akuyona nje into entsha ebaluleke kakhulu, kodwa ikhono lokukhiqiza ngobuningi, ukuqinisekisa ukutholakala kwezinto ezinobulungiswa, kanye nokwakha izinhlelo zokuvuselela kabusha ezingabizi.
Ekugcineni, ibhethri lesikhathi esizayo ngeke livele njengesinyathelo esisodwa, kodwa uchungechunge lwezinguquko ezihambisanayo kanye nokuthuthuka. Futhi uma lokho kwenzeka, umthelela walo uzodlulela ngale kwamagajethi nezimoto—amabhethri azoba yisisekelo esibalulekile sokushintshela kwamandla emhlabeni wonke ohlelweni oluhlanzekile noluqinile.
