Indian Journal of Pure and Applied Physics

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The Effect of Multi-step Sintering on the density of Li7La3Zr1.75Ce0.25O12 as Solid State Electrolyte Material


Affiliations
1 Department of Applied Physics, Delhi Technological University, Delhi 110 042, India
2 Department of Chemistry, KMC, University of Delhi, Delhi 110 007, India

The development of garnets structured Li7La3Zr2O12 (LLZO) have many amicable characteristics such as that make them good solid electrolytic materials for lithium-ion batteries. However, the poor interfacial properties and limited ionic conductivity continue to limit their wide range of applications. Hence, the current study has been focused on improving their ionic conductivity as well as the dense microstructure. This study demonstrates a simple and efficient method to produce compact ceramics with high Li+ conductivity using a multi-step sintering process. Therefore, garnet-structured oxides with the nominal chemical formula Li7La3Zr1.75Ce0.25O12 (LLZCO) have been produced. XRD and SEM characterization have been performed and confirmed the phase formation and microstructural analysis of the sample. Average crystallite size of the prepared LLZCO is calculated as 100 nm using scherrer formula from intense peaks of XRD pattern. Further, the ionic and electronic conductivities along with activation energies have been explored.

Keywords

Solid State Electrolyte, Solid State Battery, LLZO, Lanthanide Doping
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  • The Effect of Multi-step Sintering on the density of Li7La3Zr1.75Ce0.25O12 as Solid State Electrolyte Material

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Authors

Sharad Singh Jadaun
Department of Applied Physics, Delhi Technological University, Delhi 110 042, India
Amrish K Panwar
Department of Applied Physics, Delhi Technological University, Delhi 110 042, India
Geetanjali
Department of Chemistry, KMC, University of Delhi, Delhi 110 007, India

Abstract


The development of garnets structured Li7La3Zr2O12 (LLZO) have many amicable characteristics such as that make them good solid electrolytic materials for lithium-ion batteries. However, the poor interfacial properties and limited ionic conductivity continue to limit their wide range of applications. Hence, the current study has been focused on improving their ionic conductivity as well as the dense microstructure. This study demonstrates a simple and efficient method to produce compact ceramics with high Li+ conductivity using a multi-step sintering process. Therefore, garnet-structured oxides with the nominal chemical formula Li7La3Zr1.75Ce0.25O12 (LLZCO) have been produced. XRD and SEM characterization have been performed and confirmed the phase formation and microstructural analysis of the sample. Average crystallite size of the prepared LLZCO is calculated as 100 nm using scherrer formula from intense peaks of XRD pattern. Further, the ionic and electronic conductivities along with activation energies have been explored.

Keywords


Solid State Electrolyte, Solid State Battery, LLZO, Lanthanide Doping