Enhancing Li+ transport efficiency in solid-state Li-ion batteries with a ceramic-array-based composite electrolyte

Literature Information

Publication Date 2023-10-16
DOI 10.1039/D3TA05329F
Impact Factor 12.732
Authors

Shu-Ming Yeh, Chia-Chen Li


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Abstract

The electrochemical properties and potential applications of a composite solid electrolyte (CSE) named array-CSE, consisting of a Li6.4La3Zr1.4Ta0.6O12 (LLZTO) array structure embedded in a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) matrix, have been investigated. The LLZTO array is fabricated using the innovative three-dimensional printing technique, enabling precise control over its architecture. In comparison to the conventional composite electrolyte containing distributed LLZTO particles in PVDF-HFP, referred to as dispersion-CSE, the array-CSE demonstrates efficient Li+ migration along a continuous ceramic pathway, while the dispersion-CSE shows inefficient Li+ transport due to indirect trajectories. Experimental results confirm higher Li+ conductivity, lower activation energy, and a higher Li+ transference number in the array-CSE than in the dispersion-CSE. Through numerical simulations, the Li+ transport behaviors and fluxes across the individual LLZTO and PVDF-HFP regions within the CSE are clarified, and the difference in the Li+ fluxes between the array-CSE and dispersion-CSE is revealed, which is consistent with the experimental findings. When assembled into LiFePO4 batteries, the array-CSE demonstrates superior capacity and rate performance, as well as a longer cycle life. These advantages can be attributed to its enhanced conductivity and reduced void formation at the anode interface during Li stripping. These findings offer valuable insights for the design of CSEs in solid-state Li-ion batteries, with the potential for increased energy density and stability.

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Contents list

2023-12-21 Front/Back Matter

DOI: 10.1039/D4CP90003K

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Source Journal

Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
Articles per Year: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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