Grain boundaries control lithiation of solid solution substrates in lithium metal batteries
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913428831993856 |
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| author | Aota, Leonardo Shoji Jung, Chanwon Zhang, Siyuan Büyükuslu, Ömer K. Yadav, Poonam Singh, Mahander Pratap Chen, Xinren Woods, Eric Scheu, Christina Kim, Se-Ho Raabe, Dierk Gault, Baptiste |
| author_facet | Aota, Leonardo Shoji Jung, Chanwon Zhang, Siyuan Büyükuslu, Ömer K. Yadav, Poonam Singh, Mahander Pratap Chen, Xinren Woods, Eric Scheu, Christina Kim, Se-Ho Raabe, Dierk Gault, Baptiste |
| contents | The development of sustainable transportation and communication systems requires an increase in both energy density and capacity retention of Li-batteries. Using substrates forming a solid solution with body centered cubic Li enhances the cycle stability of anode-less batteries. However, it remains unclear how the substrate microstructure affects the lithiation behavior. Here, we deploy a correlative, near-atomic scale probing approach through combined ion- and electron-microscopy to examine the distribution of Li in Li-Ag diffusion couples as model system. We reveal that Li regions with over 93.8% at.% nucleate within Ag at random high angle grain boundaries, whereas grain interiors are not lithiated. We evidence the role of kinetics and mechanical constraint from the microstructure over equilibrium thermodynamics in dictating the lithiation process. The findings suggest that grain size and grain boundary character are critical to enhance the electrochemical performance of interlayers/electrodes, particularly for improving lithiation kinetics and hence reducing dendrite formation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_09374 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Grain boundaries control lithiation of solid solution substrates in lithium metal batteries Aota, Leonardo Shoji Jung, Chanwon Zhang, Siyuan Büyükuslu, Ömer K. Yadav, Poonam Singh, Mahander Pratap Chen, Xinren Woods, Eric Scheu, Christina Kim, Se-Ho Raabe, Dierk Gault, Baptiste Materials Science Chemical Physics The development of sustainable transportation and communication systems requires an increase in both energy density and capacity retention of Li-batteries. Using substrates forming a solid solution with body centered cubic Li enhances the cycle stability of anode-less batteries. However, it remains unclear how the substrate microstructure affects the lithiation behavior. Here, we deploy a correlative, near-atomic scale probing approach through combined ion- and electron-microscopy to examine the distribution of Li in Li-Ag diffusion couples as model system. We reveal that Li regions with over 93.8% at.% nucleate within Ag at random high angle grain boundaries, whereas grain interiors are not lithiated. We evidence the role of kinetics and mechanical constraint from the microstructure over equilibrium thermodynamics in dictating the lithiation process. The findings suggest that grain size and grain boundary character are critical to enhance the electrochemical performance of interlayers/electrodes, particularly for improving lithiation kinetics and hence reducing dendrite formation. |
| title | Grain boundaries control lithiation of solid solution substrates in lithium metal batteries |
| topic | Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2407.09374 |