A rechargeable lithium–air battery using a lithium ion-conducting lanthanum lithium titanate ceramics as an electrolyte separator

Inaguma, Yoshiyuki; Nakashima, Mamoru

doi:10.1016/j.jpowsour.2012.11.098

Cited by 136 publications

(80 citation statements)

References 19 publications

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“…According to the previous report, the conductivities of the grain interior and grain boundary were 1.6 © 10 ¹3 and 2.4 © 10 ¹4 S/cm. 12) In spite of higher resistance in electrode interface due to blocking Pt electrode, our results were in good agreement with those described in Ref. 12.…”

Section: Resultssupporting

confidence: 92%

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Local DC electrical properties of La2/3−xLi3xTiO3 grain boundaries

Sakamaki

Sakamoto

Fujiki

et al. 2016

J. Ceram. Soc. Japan

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Local DC electrical measurements were carried out to clarify the electrical properties of the grain boundaries of La 2/3¹x Li 3x TiO 3 ceramics. The I-Time curves exhibited a steep current decay with respect to time. The curves showed that the grain boundaries exhibited two types of behaviours. Partial grain boundaries were found to exhibit a higher current flow than the other curves. An equivalent circuit analysis was conducted with a circuit consisting of both resistance and capacitance components. The analysis results indicated that the partial grain boundary exhibited a larger capacitance, which was regarded as being the origin of the higher current flow. The increased capacitance was explained by the piling up of ions near the grain boundary, as a result of the boundary layer capacitance effect. These findings indicate that the conductivity of La 2/3¹x Li 3x TiO 3 ceramics could possibly be improved by controlling the electrical properties of the grain boundaries themselves, rather than by simply reducing the density.

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Section: Resultssupporting

confidence: 92%

“…12) As described above, there is a need to control the grain boundaries if LLTO is to be put to practical use. Moreover, it was revealed that the partial grain boundaries exhibit lower Li concentrations, which would adversely affect the conductivity.…”

Section: Introductionmentioning

confidence: 99%

Local DC electrical properties of La2/3−xLi3xTiO3 grain boundaries

Sakamaki

Sakamoto

Fujiki

et al. 2016

J. Ceram. Soc. Japan

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“…Meanwhile, safe operation of these high-energy devices has become a stringent requirement, especially for applications in large-scale renewable energy storage and electric grid, electric drive vehicles, airplanes and next-generation portable electronics 1,2,[4][5][6][7] . For both lithium-ion and lithium metal rechargeable batteries, safety issues are often associated with the formation of dendritic lithium on the negative electrode 8 .…”

mentioning

confidence: 99%

“…Typical examples are the re-engineering of the surface morphologies and coating processes of the electrodes 16,17,24 , modification of the electrolyte solvent and solute 18,19,[25][26][27][28] , incorporation of hard ceramic coatings onto the porous polymer separator 5,20,21,23 and theoretical modelling 29,30 of the mechanisms leading to dendrite formation. Unfortunately, despite intense study for several decades, it seems nearly impossible to completely eliminate dendrite formation with current technologies, as the lithium re-deposition process is inherently non-uniform and predisposed to formation of dangerous lithium dendrites.…”

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confidence: 99%

Improving battery safety by early detection of internal shorting with a bifunctional separator

et al. 2014

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Lithium-based rechargeable batteries have been widely used in portable electronics and show great promise for emerging applications in transportation and wind-solar-grid energy storage, although their safety remains a practical concern. Failures in the form of fire and explosion can be initiated by internal short circuits associated with lithium dendrite formation during cycling. Here we report a new strategy for improving safety by designing a smart battery that allows internal battery health to be monitored in situ. Specifically, we achieve early detection of lithium dendrites inside batteries through a bifunctional separator, which offers a third sensing terminal in addition to the cathode and anode. The sensing terminal provides unique signals in the form of a pronounced voltage change, indicating imminent penetration of dendrites through the separator. This detection mechanism is highly sensitive, accurate and activated well in advance of shorting and can be applied to many types of batteries for improved safety.

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“…It has been actually reported that the elimination of resistive grain-boundary by growing large grain is effective for the improvement of total lithiumion conductivity at lithium lanthanum titanate perovskite electrolyte. 20 Fig. 4.…”

Section: S CMmentioning

confidence: 99%

Enhancement of lithium-ion conductivity for Li2.2C0.8B0.2O3 by spark plasma sintering

Okumura

Takeuchi

Kobayashi

2017

J. Ceram. Soc. Japan

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Lithium-ion conductivity of Li 2.2 C 0.8 B 0.2 O 3 pellet is 2.1 © 10 ¹6 S cm ¹1 at 30°C after sintering at 450°C by spark-plasma sintering (SPS) process, which is about three times higher than the conductivity of the pellet sintered at 660°C in conventional furnace. The ionic resistance at grain boundary was especially minimalized by SPS process, which would be related to the grain-growth suppression under densification as confirmed by surficial SEM image. Improvement of chargedischarge capacity could be measured at all-solid-state lithium battery assembled by the SPS process (LiCoO 2 Li 2.2 C 0.8 B 0.2 O 3 composite electrolyte/ Li 2.2 C 0.8 B 0.2 O 3 /dry polymer/Li foil) compared with the same compositions of the battery assembled by conventional furnace sintering, which would be due to the enhancement of the ionic transfer at LiCoO 2 /Li 2.2 C 0.8 B 0.2 O 3 hetero interface as well as

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A rechargeable lithium–air battery using a lithium ion-conducting lanthanum lithium titanate ceramics as an electrolyte separator

Cited by 136 publications

References 19 publications

Local DC electrical properties of La<sub>2/3−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>TiO<sub>3</sub> grain boundaries

Local DC electrical properties of La<sub>2/3−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>TiO<sub>3</sub> grain boundaries

Improving battery safety by early detection of internal shorting with a bifunctional separator

Enhancement of lithium-ion conductivity for Li<sub>2.2</sub>C<sub>0.8</sub>B<sub>0.2</sub>O<sub>3</sub> by spark plasma sintering

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A rechargeable lithium–air battery using a lithium ion-conducting lanthanum lithium titanate ceramics as an electrolyte separator

Cited by 136 publications

References 19 publications

Local DC electrical properties of La<sub>2/3&minus;</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>TiO<sub>3</sub> grain boundaries

Local DC electrical properties of La<sub>2/3&minus;</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>TiO<sub>3</sub> grain boundaries

Improving battery safety by early detection of internal shorting with a bifunctional separator

Enhancement of lithium-ion conductivity for Li<sub>2.2</sub>C<sub>0.8</sub>B<sub>0.2</sub>O<sub>3</sub> by spark plasma sintering

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Product

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Local DC electrical properties of La<sub>2/3−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>TiO<sub>3</sub> grain boundaries

Local DC electrical properties of La<sub>2/3−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>TiO<sub>3</sub> grain boundaries