Journal of Power Sources, volume 553, pages 232302

Structure dependence of fracture toughness and ionic conductivity in lithium borophosphate glassy electrolytes for all-solid-state batteries

Zhimin Chen 1
Tao Du 1
Søren S. Sørensen 1
Rasmus Christensen 1
Zhen Qi 1
Lars R. Jensen 2
Oxana Magdysyuk 3
Mathieu Bauchy 4
Morten M. Smedskjaer 1
Publication typeJournal Article
Publication date2023-01-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor9.2
ISSN03787753
Physical and Theoretical Chemistry
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Abstract
Glass materials are potential candidates as solid electrolytes for batteries, but the atomistic origins of the variations in their properties and functionalities with composition are not well understood. Here, based on combined experimental and simulation techniques, we investigate the structural origin of the variation in fracture toughness and ionic conductivity of lithium borophosphate glass electrolytes with varying compositions. We focus on these properties since they are critically important for mechanical stability and electrochemical performances of glassy electrolytes. To this end, we have performed molecular dynamics simulations combined with X-ray total scattering experiments to provide the atomic picture of the disordered structure of borophosphate glass. The mechanical properties have been characterized through single-edge precracked beam measurements and axial tensile simulations. We find that the deformation and fracture behaviors of the electrolytes are governed by bond switching events of boron, which dissipate the strain energy during fracture. The migration of lithium ions in the electrolyte network is facilitated by hopping between superstructural rings, which reflects the important role of medium-range order structure in determining the lithium-ion diffusion. These findings have important implications for the design of future glassy electrolytes. • Structures of Li 2 O–B 2 O 3 –P 2 O 5 glassy electrolytes are reproduced by MD simulations. • Composition dependence of mechanical properties is shown by experiments and MD. • Fracture energy can be dissipated through stress-driven conversion of BO 4 to BO 3 . • Hopping of lithium ions between superstructural rings facilitates ionic conduction.

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Chen Z. et al. Structure dependence of fracture toughness and ionic conductivity in lithium borophosphate glassy electrolytes for all-solid-state batteries // Journal of Power Sources. 2023. Vol. 553. p. 232302.
GOST all authors (up to 50) Copy
Chen Z., Du T., Sørensen S. S., Christensen R., Qi Z., Jensen L. R., Magdysyuk O., Diaz-Lopez M., Bauchy M., Yue Y., Smedskjaer M. M. Structure dependence of fracture toughness and ionic conductivity in lithium borophosphate glassy electrolytes for all-solid-state batteries // Journal of Power Sources. 2023. Vol. 553. p. 232302.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1016/j.jpowsour.2022.232302
UR - https://doi.org/10.1016/j.jpowsour.2022.232302
TI - Structure dependence of fracture toughness and ionic conductivity in lithium borophosphate glassy electrolytes for all-solid-state batteries
T2 - Journal of Power Sources
AU - Chen, Zhimin
AU - Du, Tao
AU - Sørensen, Søren S.
AU - Christensen, Rasmus
AU - Qi, Zhen
AU - Jensen, Lars R.
AU - Magdysyuk, Oxana
AU - Diaz-Lopez, Maria
AU - Bauchy, Mathieu
AU - Yue, Yuanzheng
AU - Smedskjaer, Morten M.
PY - 2023
DA - 2023/01/01 00:00:00
PB - Elsevier
SP - 232302
VL - 553
SN - 0378-7753
ER -
BibTex
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BibTex Copy
@article{2023_Chen,
author = {Zhimin Chen and Tao Du and Søren S. Sørensen and Rasmus Christensen and Zhen Qi and Lars R. Jensen and Oxana Magdysyuk and Maria Diaz-Lopez and Mathieu Bauchy and Yuanzheng Yue and Morten M. Smedskjaer},
title = {Structure dependence of fracture toughness and ionic conductivity in lithium borophosphate glassy electrolytes for all-solid-state batteries},
journal = {Journal of Power Sources},
year = {2023},
volume = {553},
publisher = {Elsevier},
month = {jan},
url = {https://doi.org/10.1016/j.jpowsour.2022.232302},
pages = {232302},
doi = {10.1016/j.jpowsour.2022.232302}
}
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