Ko makristasi emvura se electrolyte mumabhatiri e-lithium-ion achaita kuti zvikwanise kugadzira masero esimbi eti lithium?
Zviri mukati
Chidzidzo chinonakidza chakaitwa neCarnegie Mellon University. Masayendisiti akafunga kushandisa makristasi emvura mumasero e-lithium-ion kuwedzera simba ravo resimba, kugadzikana, uye kukwanisa kuchaja. Basa harisati raenderera mberi, saka tichamirira makore mashanu kuti vapedzwe - kana zvichibvira.
Makristasi eLiquid akashandura zviratidziro, zvino anogona kubatsira mabhatiri
Tafura yezvinyorwa
- Makristasi eLiquid akashandura zviratidziro, zvino anogona kubatsira mabhatiri
- Liquid makristasi semanomano ekuwana mvura-yakasimba electrolyte
Muchidimbu: vanogadzira masero e-lithium-ion parizvino vari kutsvaga kuwedzera kusimba kwesimba remasero pavanenge vachichengetedza kana kuvandudza mashandiro emasero, kusanganisira, semuenzaniso, kuvandudza kugadzikana pamasimba epamusoro ekuchaja. Pfungwa ndeyekuita kuti mabhatiri areruke, achengetedzeke, uye akurumidze kuchaja. Zvakada kufanana nekatatu-kachipa-chakanaka chetatu.
Imwe yenzira dzekuwedzera zvakanyanya simba rakananga remasero (ne1,5-3 nguva) ndiko kushandiswa kweanode yakagadzirwa ne lithium metal (Li-metal).... Kwete kabhoni kana silicon, sepakutanga, asi lithium, chinhu chinokonzeresa kugona kwesero. Dambudziko nderekuti urongwa uhwu hunokurumidza kugadzira lithium dendrites, simbi inoputika iyo nekufamba kwenguva inobatanidza magetsi maviri, ichikuvadza.
Liquid makristasi semanomano ekuwana mvura-yakasimba electrolyte
Basa riri kuenderera mberi rekurongedza anode muzvinhu zvakasiyana-siyana kugadzira goko rekunze rinobvumira kuyerera kwelithium ion asi risingatenderi zvimiro zvakasimba kukura. Iyo inogona kugadzirisa dambudziko iri zvakare kushandiswa kweiyo yakasimba electrolyte - madziro ayo ma dendrites asingagoni kupinda.
Masayendisiti paCarnegie Mellon University akatora nzira yakasiyana: vanoda kugara neproved liquid electrolytes, asi zvichibva pamakristasi emvura. Liquid crystals zvimiro zviri pakati nepakati pakati pemvura nemakristasi, ndiko kuti, zvimedu zvine chimiro chakarairwa. Liquid makristasi ari mvura, asi mamorekuru awo akarongedzerwa zvakanyanya (mabviro).
Payero yemolecular, chimiro chekristaro yemvura electrolyte inongova crystalline chimiro uye nokudaro inovhara kukura kwe dendrites. Zvisinei, isu tichiri kubata nemvura, kureva, chikamu chinobvumira ions kufamba pakati pemagetsi. Dendrite kukura kwakavharwa, mitoro inofanira kuyerera.
Izvi hazvina kutaurwa muchidzidzo, asi makristasi emvura ane chimwe chinhu chakakosha: kana magetsi aiswa kwavari, anogona kurongwa mune imwe hurongwa (sezvaunogona kuona, semuenzaniso, nekutarisa mazwi aya uye muganhu pakati pevatema. mabhii uye chiedza chekumashure). Saka zvinogona kuitika kuti kana sero ratanga kuchaja, mvura yekristaro mamorekuru anoiswa pane imwe kona uye "scrape" dendritic deposits kubva kuma electrode.
Kuona, izvi zvichafanana nekuvhara kwezviputi, taura, mugomba remhepo.
Kuipa kwemamiriro acho ezvinhu ndiko Carnegie Mellon University ichangotanga tsvagiridzo pamagetsi matsva... Izvo zvave kutozivikanwa kuti kugadzikana kwavo kwakaderera pane kweiyo yakajairwa mvura electrolytes. Kuora kwesero kunoitika nekukurumidza, uye iyi haisiriyo gwara rinotifarira. Zvisinei, zvinokwanisika kuti nekufamba kwenguva dambudziko racho richagadziriswa. Zvakare, isu hatitarisire kutaridzika kweakasimba-nyika makomisheni pamberi pehafu yechipiri yemakore gumi:
> LG Chem inoshandisa sulfides mumasero akasimba. Solid electrolyte kushambadzira kwete pamberi pe2028
Mufananidzo wekutanga: Lithium dendrites inoumbwa pane electrode yemicroscopic lithium-ion cell. Mufananidzo mukuru werima pamusoro ndiyo yechipiri electrode. Iyo yekutanga "bubble" yeatomu yelithium inokwira kumusoro pane imwe nguva, ichigadzira "whisker" inova hwaro hweinobuda dendrite (c) PNNL Unplugged / YouTube:
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