2012
DOI: 10.1016/j.jpowsour.2012.01.094
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Lithium metal electrode kinetics and ionic conductivity of the solid lithium ion conductors “Li7La3Zr2O12” and Li7−La3Zr2−Ta O12 with garnet-type structure

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Cited by 225 publications
(180 citation statements)
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“…Similar pellet assemblies have been tested against Li in the work by Buschmann et al [ 38 ] A typical Nyquist plot of a c-Li 6.25 Al 0.25 La 3 Zr 2 O 12 pellet measured at room temperature by electrochemical impedance spectroscopy is displayed in Figure 3 a. The impedance data were fi tted with an equivalent circuit of the form ( R bulk )( R gb Q gb )( Q electrode ), denoting bulk resistance, grain boundary resistance and capacitance, and double layer capacitance from the ion blocking electrodes.…”
Section: Resultsmentioning
confidence: 99%
“…Similar pellet assemblies have been tested against Li in the work by Buschmann et al [ 38 ] A typical Nyquist plot of a c-Li 6.25 Al 0.25 La 3 Zr 2 O 12 pellet measured at room temperature by electrochemical impedance spectroscopy is displayed in Figure 3 a. The impedance data were fi tted with an equivalent circuit of the form ( R bulk )( R gb Q gb )( Q electrode ), denoting bulk resistance, grain boundary resistance and capacitance, and double layer capacitance from the ion blocking electrodes.…”
Section: Resultsmentioning
confidence: 99%
“…However, high conductivity above 10 −4 S cm −1 at a room temperature range is only obtained in the former, densified by high temperature sintering. Partial substitution of the Zr 4+ site in LLZ by other higher valence cations, such as Nb 5+ [13,14], Ta 5+ [15][16][17][18][19][20][21][22][23], W 6+ [24,25], and Mo 6+ [26], is effective at stabilizing the cubic phase, and the conductivity at room temperature is greatly improved to 1 mS cm −1 by controlling the dopants content and optimizing Li + concentration in the garnet framework. Although a solid-state battery with an Nb-doped LLZ as SE has already been demonstrated [13,27,28], a Ta-doped LLZ showed much better chemical stability against a Li metal electrode than when Nb-doped [29,30].…”
Section: Introductionmentioning
confidence: 99%
“…One possibility is that these high temperature cubic phases reported earlier actually contained Al inadvertently incorporated from crucibles or furnace linings during calcination. When Al is deliberately added during synthesis, smaller cell parameters are observed [6,9] because of the substitution of the smaller Al 3+ for Li + [13,14].…”
Section: Introductionmentioning
confidence: 99%