Dɛn ne nsu mu electrolyte?
Nsu a ɛwɔ electrolyte mu .
(1) Nnuru a ɛwɔ mu no, wɔsan frɛ no electrolyte a ɛyɛ electrolyte solution. Ɛyɛ organic liquid electrolyte a wɔtaa de di dwuma wɔ lithium-ion battery mu, a wɔsan frɛ no non{3}}nsu a ɛyɛ nsuo a ɛyɛ nsuo. Organic liquid electrolyte yɛ lithium nkyene, organic solvent, ne nneɛma a wɔde ka ho.
1 Lithium nkyene: titiriw na ɛma ions a ɛma nsu kɔ mu. Lithium hexafluorophosphate ne lithium nkyene a wɔde di dwuma kɛse wɔ lithium a wɔtɔn-ion batere mu. Lipf6 a ɛho tew yɛ ahwehwɛ fitaa, a ɛtumi nwura mu wɔ organic solvents te sɛ low-alkyl ethers, nitriles, pyridine esters, ketones, ne alcohols mu, nanso ɛnyɛ nea ɛtumi nwura nneɛma a ɛwɔ nkwa mu te sɛ alkanes ne benzene. Lipf6 electrolyte no wɔ nsu a ɛkɔ nipadua no mu a ɛkɔ soro kakra; Wɔ 20℃, EC + DMC (volume ratio 1:1) no tumi yɛ 10×10-2s/cm. Mpɛn pii no, conductivity no du nea ɛsen biara bere a electrolyte dodow no bɛn 1mol/L no. LipF6 wɔ electrochemical adwumayɛ a ɛyɛ den na ɛnsɛe mprempren collector no. Nanso, LipF6 ntumi nnyina yiye na ɛporɔw ntɛmntɛm wɔ nsu mu, na ɛhwehwɛ sɛ wodi nneɛma a atwa yɛn ho ahyia a ɛwɔ mu no so denneennen bere a woresiesie ne ho no.
2 organic solvents: Wɔn dwumadi titiriw ne sɛ ɛbɛma lithium nkyene no apete, na ama lithium nkyene electrolyte no atumi ayɛ conductive ions.
Nneɛma a wɔtaa de yɛ nnuru a wɔde yɛ nnuru no bi ne propylene carbonate, dimethyl carbonate, ne diethyl carbonate.
Wɔtaa paw organic solvents esiane wɔn dielectric constant ne low viscosity nti. Dielectric constant a ɛkorɔn ma lithium nkyene no yɛ mmerɛw sɛ ɛbɛpete na apaapae; Nneɛma a ɛyɛ den a ɛba fam no ma ion tu ntɛmntɛm. Nanso, nokwarem no, nnuru a wɔde yɛ nneɛma a ɛwɔ dielectric constants a ɛkɔ soro no yɛ nea ɛyɛ den kɛse, na nnuru a wɔde yɛ nneɛma a ɛwɔ nsu a ɛyɛ den a ɛba fam no wɔ dielectric constants a ɛba fam. Enti, ɛyɛ den sɛ aduru biako pɛ na ɛbɛma wɔadi saa ahwehwɛde ahorow yi nyinaa ho dwuma bere koro mu. Lithium-ion battery taa de organic solvents a wɔde afrafra a ɛwɔ dielectric constants a ɛkorɔn ne nea ɛwɔ ntini a ɛyɛ den a ɛba fam di dwuma de tua nneɛma a ɛwɔ afã biara mu sintɔ ahorow so ka. Sɛ nhwɛso no, EC carbonates wɔ dielectric constants a ɛkɔ soro, a mfaso wɔ so ma lithium nkyene a ɛpaapae, bere a DMC, DEC, ne EMC carbonates no ntumi nkɔ so nyɛ adwuma yiye, na ɛboa ma lithium ions no tu mpɔn.
3 Nneɛma a wɔde ka ho: Mpɛn pii no, wodi dwuma wɔ anyinam ahoɔden ne ahobammɔ a ɛwɔ electrolyte no mu a ɛma ɛyɛ yiye na ɛma ɛyɛ kɛse no mu. Sɛ yɛbɛka no ɔkwan biara so a, nneɛma a wɔde ka ho no wɔ dwumadi atitiriw abiɛsa: AA ma SEI aduru no adwumayɛ tu mpɔn, te sɛ vinylene carbonate (VC), vinyl sulfite (ES), ne SO2 a wɔde ka ho; b. siw charge a ɛboro so (denam biphenyl a wode bɛka ho) ne nea ɛboro so-discharging no ano; c. Nneɛma a ɛmma ogya ntumi nhyew no betumi asiw batere no ano sɛ ɛbɛhyew anaasɛ ɛrepae wɔ ɔhyew a ɛboro so mu, te sɛ ogya a ɛmma ogya ntumi nhyew a wɔde halogenated ayɛ, phosphorus-agya a ɛmma ogya ntumi nhyew, ne nneɛma a ɛmma ogya ntumi nhyew no; d. Tew nsu a ɛwɔ mu ne HF a ɛwɔ electrolyte no mu no so.
