Field assisted sintering of dense Al-substituted cubic phase Li7La3Zr2O12 solid electrolytes

Zhang, Yanhua; Fei, Chen; Tu, Rong; Shen, Qiang; Zhang, Lianmeng

doi:10.1016/j.jpowsour.2014.03.148

Cited by 165 publications

(82 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Especially the overall density is known to play a crucial role for obtaining high conductivities. Considerable effort has been made to achieve higher densities for bulk ceramics using nano-grained LLZO, 26 field assisted sintering technique for compaction, 27,28 or sintering aids like Ga. 29 Therefore, the fact that the performance of the tetragonal LLZO thin film grown by LA-CVD is among the best values reported for tetragonal LLZO so far, is attributed primarily to the high density of the film (see Fig. 2).…”

Section: Assignment Of the R1-cpe1 Element To The LI 7 La 3 Zr 2 O 12mentioning

confidence: 99%

Garnet-Type Li₇La₃Zr₂O₁₂Solid Electrolyte Thin Films Grown by CO₂-Laser Assisted CVD for All-Solid-State Batteries

Loho

Djenadic

Bruns

et al. 2016

J. Electrochem. Soc.

114

View full text Add to dashboard Cite

The detailed characterization of garnet-type Li-ion conducting Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolyte thin films grown by novel CO 2 -laser assisted chemical vapor deposition (LA-CVD) is reported. A deposition process parameter study reveals that an optimal combination of deposition temperature and oxygen partial pressure is essential to obtain high quality tetragonal LLZO thin films. The polycrystalline tetragonal LLZO films grown on platinum have a dense and homogeneous microstructure and are free of cracks. A total lithium ion conductivity of 4.2 · 10 −6 S · cm −1 at room temperature, with an activation energy of 0.50 eV, is achieved. This is the highest total lithium ion conductivity value reported for tetragonal LLZO thin films so far, being about one order of magnitude higher than previously reported values for tetragonal LLZO thin films prepared by sputtering and pulsed laser deposition. The results of this study suggest that the tetragonal LLZO thin films grown by LA-CVD are applicable for the use in all-solid-state thin film lithium ion batteries. Over the last decades a progressive miniaturization of electronic components took place. As a result there is an increasing demand for micro-sized power sources that drives the current research on thin film batteries. Possible applications range from sensors and radiofrequency identification tags to implantable medical devices. For these applications an all-solid-state thin film Li-ion battery is desirable due to considerable advantages such as excellent safety properties and easy integration in microelectronics. Furthermore, the energy density of such an all-solid-state cell can be increased compared to a cell with conventional liquid electrolyte, if the chosen solid electrolyte material is stable toward high voltage cathode materials as well as toward a lithium metal anode. The garnet-type solid electrolyte Li 7 La 3 Zr 2 O 12 (LLZO), first reported in 2007 by Murugan et al., 1 is a material that combines those properties with reasonably high lithium ion conductivity of up to 2.3 · 10 −5 S · cm −1 in its tetragonal 2 and up to 1.2 · 10 −3S · cm −1 in its cubic 3 modification. However, these high conductivity values have so far only been achieved for bulk ceramics, but not for thin films. Apparently, over the last years researchers have focused on the optimization of the lithium ion conductivity in bulk ceramics, e.g. by stabilization of the cubic LLZO phase via doping, 4,5 while only a few publications have addressed LLZO thin film deposition at all. 6-12The advantage of thin films is that their lithium ion conductivity for the use in an all-solid-state battery does not need to be as high as compared to bulk solid electrolytes, taking into account the electrolyte resistance R:where A is the contact area, l is the thickness and σ is the Li-ion conductivity of the solid electrolyte, respectively. For example, in their recent study Liu et al. 13 report on a functioning bulk all-solid-state battery using cubic LLZO as solid electrolyte with ∼ 1 mm thickn...

show abstract

Section: Assignment Of the R1-cpe1 Element To The LI 7 La 3 Zr 2 O 12mentioning

confidence: 99%

Garnet-Type Li₇La₃Zr₂O₁₂Solid Electrolyte Thin Films Grown by CO₂-Laser Assisted CVD for All-Solid-State Batteries

Loho

Djenadic

Bruns

et al. 2016

J. Electrochem. Soc.

114

View full text Add to dashboard Cite

show abstract

“…However, most solid electrolytes still exhibit low ionic conductivity leading to insufficient battery power output. [23][24][25][26] Fewer reports have been presented on solid electrolytes 27-31 than on the modification of liquid electrolytes [16][17][18][19][20][32][33][34][35][36] to improve the anode in Li-air batteries. In addition, until now, most studies on solid electrolytes have focused on enhancing the ionic conductivity electrolytes, 25,[37][38][39] and the solid electrolytes used in Li-air batteries have been generally separated from the Li electrode by a separator or polymer electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Insights into degradation of metallic lithium electrodes protected by a bilayer solid electrolyte based on aluminium substituted lithium lanthanum titanate in lithium-air batteries

Hằng

Ngo

et al. 2016

J. Mater. Chem. A

View full text Add to dashboard Cite

Lithium (Li) metal can be degraded by factors such as irregular Li stripping, Li dendritic growth, and the growth of a solid electrolyte interphase (SEI) layer, finally leading to the performance deterioration of the Li-air battery. In particular, the operation of the Li-air battery in ambient air remains a considerable challenge due to the possible occurrence of parasitic reactions on Li metal with moisture and other contaminants diffusing from the outside air. In this work, a protected Li electrode (PLE) composed of Li metal covered with a bilayer lithium phosphorous oxynitride (LiPON) / aluminium substituted lithium lanthanum titanate (A-LLTO) solid electrolyte was suggested. The mechanism for the degradation of Li electrodes with and without LiPON/A-LLTO protection layer was compared using the Li symmetric cell and Li-air cell by investigating the electrochemical performance of cells and the growth of Li dendrites. The Li symmetric cell employing the LiPON/A-LLTO exhibited superior cyclability to the cell without the solid electrolyte due to the effective suppression of Li dendritic growth. Further, the aprotic Li-air cell employing the PLE showed outstanding electrochemical performance when operated in pure oxygen and even in an air atmosphere: a long life span of 128 cycles in oxygen atmosphere and 20 cycles in air atmosphere under the limited capacity mode of 1000 mAh g -1 . The obtained excellent performance of the Liair cell employing the PLE is attributed to the effective suppression of the Li dendrite growth and electrolyte decomposition with the presence of LiPON/A-LLTO. In addition, dense LiPON/A-LLTO completely protected the Li metal electrode from the penetration of oxygen, moisture, and other contaminants which can degrade the Li metal electrode.

show abstract

“…The difference between PAS and SPS is that before sintering in PAS there is pulse voltage which could shock vaporizes impurities on the surfaces of the particles, and the particles could be activated by the build-up of heat and strain energy. Therefore, the FAST can be implemented to fabricate a broad variety of materials and been particularly effective at decreasing the temperatures required for complete densification [21,22].…”

Section: Introductionmentioning

confidence: 99%

Field assisted sintering of graphene reinforced zirconia ceramics

Fei

Jin

Tyeb

et al. 2015

Ceramics International

Self Cite

View full text Add to dashboard Cite

Field assisted sintering of dense Al-substituted cubic phase Li7La3Zr2O12 solid electrolytes

Cited by 165 publications

References 18 publications

Garnet-Type Li₇La₃Zr₂O₁₂Solid Electrolyte Thin Films Grown by CO₂-Laser Assisted CVD for All-Solid-State Batteries

Garnet-Type Li₇La₃Zr₂O₁₂Solid Electrolyte Thin Films Grown by CO₂-Laser Assisted CVD for All-Solid-State Batteries

Insights into degradation of metallic lithium electrodes protected by a bilayer solid electrolyte based on aluminium substituted lithium lanthanum titanate in lithium-air batteries

Field assisted sintering of graphene reinforced zirconia ceramics

Contact Info

Product

Resources

About

Field assisted sintering of dense Al-substituted cubic phase Li7La3Zr2O12 solid electrolytes

Cited by 165 publications

References 18 publications

Garnet-Type Li7La3Zr2O12Solid Electrolyte Thin Films Grown by CO2-Laser Assisted CVD for All-Solid-State Batteries

Garnet-Type Li7La3Zr2O12Solid Electrolyte Thin Films Grown by CO2-Laser Assisted CVD for All-Solid-State Batteries

Insights into degradation of metallic lithium electrodes protected by a bilayer solid electrolyte based on aluminium substituted lithium lanthanum titanate in lithium-air batteries

Field assisted sintering of graphene reinforced zirconia ceramics

Contact Info

Product

Resources

About

Garnet-Type Li₇La₃Zr₂O₁₂Solid Electrolyte Thin Films Grown by CO₂-Laser Assisted CVD for All-Solid-State Batteries

Garnet-Type Li₇La₃Zr₂O₁₂Solid Electrolyte Thin Films Grown by CO₂-Laser Assisted CVD for All-Solid-State Batteries