This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Article
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Garnet-type solid electrolytes have attracted an extensive attention for high-energy solid-state lithium batteries. However, the high processing temperature up to 1200°C with high cost limits the large-scale production. Here, we report a simple approach to reduce the sintering temperature by a conformal coating of nanoscale amorphous alumina, without sacrificing ionic conductivity. The ceramic sintered at 980°C shows a high ionic conductivity of 0.13 mS cm− 1 at room temperature. It reveals that the second phase segregated at grain boundaries can promote Li-ion transport, block electronic conduction, and improve mechanical property. The Li symmetry cells using this garnet electrolyte indicate a long-term 2500 cycle life and a high critical current density of 0.52 mA cm− 2. The garnet electrolyte enables the high-voltage cells using Li1.2Ni0.2Mn0.6O2 to deliver a high specific capacity of 248 mAh g− 1 at 0.05 C-rate. This work provides a new clue to lower sintering temperature for garnet electrolytes, which can extend to other ceramics towards practical applications.
Keywords
Garnet-type Solid Electrotypes, Conformal Coating, Nanoscale Amorphous Alumina, Ionic Conductivity
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- SupplementaryInformation.docx
Supplementary Information
- VideoS1.mp4
Supplementary Video
Loading...
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 09 Mar, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Learn more about our company.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Article
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 09 Mar, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Garnet-type solid electrolytes have attracted an extensive attention for high-energy solid-state lithium batteries. However, the high processing temperature up to 1200°C with high cost limits the large-scale production. Here, we report a simple approach to reduce the sintering temperature by a conformal coating of nanoscale amorphous alumina, without sacrificing ionic conductivity. The ceramic sintered at 980°C shows a high ionic conductivity of 0.13 mS cm− 1 at room temperature. It reveals that the second phase segregated at grain boundaries can promote Li-ion transport, block electronic conduction, and improve mechanical property. The Li symmetry cells using this garnet electrolyte indicate a long-term 2500 cycle life and a high critical current density of 0.52 mA cm− 2. The garnet electrolyte enables the high-voltage cells using Li1.2Ni0.2Mn0.6O2 to deliver a high specific capacity of 248 mAh g− 1 at 0.05 C-rate. This work provides a new clue to lower sintering temperature for garnet electrolytes, which can extend to other ceramics towards practical applications.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- SupplementaryInformation.docx
Supplementary Information
- VideoS1.mp4
Supplementary Video
Loading...