Ukusetyenziswa kwe-CMC Binder kwiibhetri

Kummandla wobuchwepheshe bebhetri, ukhetho lwemathiriyeli yesibophelelo ludlala indima ebalulekileyo ekumiseleni ukusebenza, ukuzinza, kunye nobomi obude bebhetri.Carboxymethyl cellulose (CMC), i-polymer e-soluble yamanzi ephuma kwi-cellulose, iye yavela njenge-binder ethembisayo ngenxa yeempawu zayo ezikhethekileyo ezifana nokuqina okuphezulu, amandla okwenza ifilimu, kunye nokuhambelana nokusingqongileyo.

Imfuno ekhulayo yeebhetri ezisebenza kakhulu kumashishini ahlukeneyo, kubandakanya iimoto, i-elektroniki, kunye namandla ahlaziyekayo, ikhuthaze iinzame zophando ezibanzi zokuphuhlisa imathiriyeli yebhetri entsha kunye nobuchwepheshe. Phakathi kwezinto eziphambili zebhetri, isibophelelo sidlala indima ebalulekileyo ekuthinteleni imathiriyeli esebenzayo kumqokeleli wangoku, iqinisekisa intlawulo efanelekileyo kunye nemijikelo yokukhupha. Izibophelelo zemveli ezifana ne-polyvinylidene fluoride (PVDF) zinezithintelo ngokubhekiselele kwimpembelelo yokusingqongileyo, iimpawu zomatshini, kunye nokuhambelana neekhemistri zebhetri zesizukulwana esilandelayo. I-Carboxymethyl cellulose (CMC), eneempawu zayo ezizodwa, iye yavela njengenye into ethembisayo ye-binder yokuphucula ukusebenza kwebhetri kunye nokuzinza.

1. Iipropathi zeCarboxymethyl Cellulose (CMC):
I-CMC yinto ephuma emanzini e-cellulose, i-polymer yendalo eninzi kwiindonga zeeseli zezityalo. Ngokuguqulwa kweekhemikhali, amaqela e-carboxymethyl (-CH2COOH) angeniswa kwi-backbone ye-cellulose, okubangelwa ukunyibilika okuphuculweyo kunye nokuphuculwa kwezinto zokusebenza. Ezinye iimpawu eziphambili zeCMC ezifanelekileyo kwisicelo sayo

(1) iibhetri ziquka:

Amandla aphezulu okubambelela: I-CMC ibonisa iimpawu eziqinileyo zokubambelela, ezivumela ukuba zibophe ngokufanelekileyo izinto ezisebenzayo kumqokeleli wangoku, ngaloo ndlela iphucula ukuzinza kwe-electrode.
Ikhono elihle lokwenza ifilimu: I-CMC inokwenza iifilimu ezifanayo kunye nezixineneyo kumphezulu we-electrode, iququzelele ukufakwa kwezinto ezisebenzayo kunye nokuphucula ukusebenzisana kwe-electrode-electrolyte.
Ukuhambelana kokusingqongileyo: Njengepolima enokubolisa nengenatyhefu evela kwimithombo ehlaziyekayo, i-CMC ibonelela ngeengenelo zokusingqongileyo ngaphezu kwezibophelelo ezenziweyo ezifana ne-PVDF.

2.Ukusetyenziswa kwe-CMC Binder kwiibhetri:

(1) Ukwenziwa kwe-Electrode:

I-CMC idla ngokusetyenziswa njengesibophelelo ekwenziweni kwee-electrode kwiikhemistri ezahlukeneyo zebhetri, kubandakanywa iibhetri ze-lithium-ion (LIBs), iibhetri zesodium-ion (SIBs), kunye ne-supercapacitors.
Kwii-LIBs, i-CMC iphucula ukubambelela phakathi kwezinto ezisebenzayo (umzekelo, i-lithium cobalt oxide, i-graphite) kunye nomqokeleli wangoku (umzekelo, i-foil yobhedu), ekhokelela ekuphuculeni ukunyaniseka kwe-electrode kunye nokunciphisa i-delamination ngexesha lokuhamba ngebhayisikili.
Ngokufanayo, kwii-SIBs, ii-electrode ezisekelwe kwi-CMC zibonisa ukuzinza okuphuculweyo kunye nokusebenza kwebhayisikile xa kuthelekiswa nee-electrode ezinezibophelelo eziqhelekileyo.
Isakhono sokwenza ifilim kaCMCiqinisekisa ukugquma okufanayo kwezinto ezisebenzayo kumqokeleli wangoku, ukunciphisa i-electrode porosity kunye nokuphucula i-ion transport kinetics.

(2) Ukwandiswa kokuSebenza:

Ngelixa i-CMC ngokwayo ingaqhubeki, ukudityaniswa kwayo kwimixube ye-electrode kunokwandisa ukuhanjiswa kombane ngokubanzi kwe-electrode.
Amaqhinga anjengokongezwa kwezongezo zokuqhuba (umzekelo, i-carbon black, igraphene) ecaleni kwe-CMC ziye zaqeshwa ukuthomalalisa i-impedance eyayanyaniswa nee-electrode ezisekelwe kwi-CMC.
Iinkqubo ze-Hybrid binder ezidibanisa i-CMC kunye neepolymers eziqhubayo okanye i-carbon nanomaterials zibonise iziphumo ezithembisayo ekuphuculeni i-electrode conductivity ngaphandle kokuncama iipropati zomatshini.

3.Uzinzo lwe-Electrode kunye nokuSebenza kweBhayisikile:

I-CMC idlala indima ebalulekileyo ekugcineni uzinzo lwe-electrode kunye nokuthintela ukukhutshwa kwezinto ezisebenzayo okanye i-agglomeration ngexesha lokuhamba ngebhayisikile.
Ukuguquguquka kunye nokubambelela ngokuqinileyo okubonelelwa yi-CMC kunegalelo kwintembeko yomatshini we-electrode, ngakumbi phantsi kweemeko zoxinzelelo oluguquguqukayo ngexesha lokujikeleza kwentlawulo.
ubume be-hydrophilic ye-CMC inceda ekugcineni i-electrolyte ngaphakathi kwesakhiwo se-electrode, iqinisekisa uthutho lwe-ion oluzinzileyo kunye nokunciphisa umthamo wokuphelelwa ngamandla phezu kokuhamba ngebhayisikile ixesha elide.

4.Imingeni kunye neeNjongo zexesha elizayo:

Ngelixa ukusetyenziswa kwesibophelelo se-CMC kwiibhetri kunika iingenelo ezibalulekileyo, imingeni emininzi kunye namathuba okuphucula

(1) ikhona:

Ukuqhuba Okuphuculweyo: Uphando olongezelelekileyo luyafuneka ukuze kwandiswe ukuqhutywa kwee-electrode ezisekwe kwi-CMC, nokuba kungeendlela ezintsha zokwenziwa kwe-binder okanye indibaniselwano ye-synergistic enezongezo zokuqhuba.
Ukuhambelana ne-High-Energy Che

ii-mistries: Ukusetyenziswa kwe-CMC kwiikhemistri zebhetri ezisakhulayo ezinoxinzelelo olukhulu lwamandla, njenge-lithium-sulphur kunye neebhetri zomoya-zilithium, kufuna ukuqwalaselwa ngononophelo kuzinzo kunye nokusebenza kwe-electrochemical.

(2) Ukubaleka kunye nokusebenza kakuhle kweendleko:
Imveliso ye-industrial-scale ye-electrode esekwe kwi-CMC kufuneka isebenze ngokwezoqoqosho, ifuna iindlela zokwenziwa kweendleko ezisebenzayo kunye neenkqubo zokwenziwa kwemveliso.

(3) Uzinzo lokuSingqongileyo:
Ngelixa i-CMC ibonelela ngeengenelo zokusingqongileyo ngaphezu kwezibophelelo eziqhelekileyo, iinzame zokwandisa uzinzo ngakumbi, ezinjengokusebenzisa imithombo yeselulosi ehlaziyiweyo okanye ukuphuhlisa i-electrolyte enokubola, ifanelekile.

Carboxymethyl cellulose (CMC)imele imathiriyeli yesibophelelo esiguquguqukayo nesizinzileyo esinamandla amakhulu wokuqhubela phambili ubuchwepheshe bebhetri. Inhlanganisela yayo ekhethekileyo yamandla okubambelela, amandla okwenza ifilimu, kunye nokuhambelana nokusingqongileyo kwenza kube yinto ekhangayo yokuphucula ukusebenza kwe-electrode kunye nokuzinza kuluhlu lweekhemistri zebhetri. Uphando oluqhubekayo kunye neenzame zophuhliso ezijolise ekwandiseni ukuqulunqwa kwe-electrode esekwe kwi-CMC, ukuphucula ukusebenza, kunye nokujongana nemiceli mngeni yobunzima kuya kuvula indlela yokwamkelwa ngokubanzi kwe-CMC kwiibhetri zesizukulwana esilandelayo, igalelo kuphuhliso lobuchwepheshe bamandla acocekileyo.