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| Hauptseite > Publikationsdatenbank > On the interfacial charge transfer between solid and liquid Li + electrolytes > print |
| Hauptseite > Publikationsdatenbank > On the interfacial charge transfer between solid and liquid Li + electrolytes > print |
| 001 | 838295 | ||
| 005 | 20240711101459.0 | ||
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| 100 | 1 | _ | |a Schleutker, Marco |0 P:(DE-Juel1)166094 |b 0 |
| 245 | _ | _ | |a On the interfacial charge transfer between solid and liquid Li + electrolytes |
| 260 | _ | _ | |a Cambridge |c 2017 |b RSC Publ. |
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| 520 | _ | _ | |a The Li+ ion transfer between a solid and a liquid Li+ electrolyte has been investigated by DC polarisation techniques. The current density i is measured as a function of the electrochemical potential drop Δ[small mu, Greek, tilde]Li+ at the interface, using a liquid electrolyte with different Li+ concentrations. The subject of this experimental study is the interface between the solid electrolyte Ta-substituted lithium lanthanum zirconate (Li6.6La3Zr1.6Ta0.4O12) and a liquid electrolyte consisting of LiPF6 dissolved in ethylene carbonate/dimethyl carbonate (1 : 1). The functional course of i vs. Δ[small mu, Greek, tilde]Li+ can be described by a serial connection between a constant ohmic resistance Rslei and a current dependent thermally activated ion transfer process. For the present solid–liquid electrolyte interface the areal resistance Rslei of the surface layer is independent of the Li+ concentration in the liquid electrolyte. At room temperature a value of about 300 Ω cm2 is found. The constant ohmic resistance Rslei can be attributed to a surface layer on the solid electrolyte with a (relatively) low conductivity (solid–liquid electrolyte interphase). The low conducting surface layer is formed by degradation reactions with the liquid electrolyte. Rslei is considerably increased if a small amount (ppm) of water is added to the liquid electrolyte. The thermally activated ionic transfer process obeys a Butler–Volmer like behaviour, resulting in an exchange current density i0 depending on the Li+ concentration in the liquid electrolyte by a power-law. At a Li+ concentration of 1 mol l−1 a value of 53.1 μA cm−2 is found. A charge transfer coefficient α of ∼0.44 is measured. The finding of a superposed constant ohmic resistance due to a solid–liquid electrolyte interphase and a current dependent thermally activated ion transfer process is confirmed by the results of two former experimental studies from the literature, performing AC measurements/EIS. |
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| 700 | 1 | _ | |a Bahner, Jochen |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Tsai, Chih-Long |0 P:(DE-Juel1)156244 |b 2 |
| 700 | 1 | _ | |a Stolten, Detlef |0 P:(DE-Juel1)129928 |b 3 |
| 700 | 1 | _ | |a Korte, Carsten |0 P:(DE-Juel1)140525 |b 4 |e Corresponding author |
| 773 | _ | _ | |a 10.1039/C7CP05213H |g p. 10.1039.C7CP05213H |0 PERI:(DE-600)1476244-4 |n 39 |p 26596--26605 |t Physical chemistry, chemical physics |v 19 |y 2017 |x 1463-9084 |
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