Visualization of electrochemically driven solid-state phase transformations using operando hard X-ray spectro-imaging
Abstract
In situ techniques with high temporal, spatial and chemical resolution are key to understand ubiquitous solid-state phase transformations, which are crucial to many technological applications. Hard X-ray spectro-imaging can visualize electrochemically driven phase transformations but demands considerably large samples with strong absorption signal so far. Here we show a conceptually new data analysis method to enable operando visualization of mechanistically relevant weakly absorbing samples at the nanoscale and study electrochemical reaction dynamics of iron fluoride, a promising high-capacity conversion cathode material. In two specially designed samples with distinctive microstructure and porosity, we observe homogeneous phase transformations during both discharge and charge, faster and more complete Li-storage occurring in porous polycrystalline iron fluoride, and further, incomplete charge reaction following a pathway different from conventional belief. In conclusion, these mechanistic insights provide guidelines for designing better conversion cathode materials to realize the promise of high-capacity lithium-ion batteries.
- Authors:
-
- Univ. of Wisconsin-Madison, Madison, WI (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Photon Sciences Directorate
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Sustainable Energy Technologies
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Univ. of Illinois, Chicago, IL (United States)
- Univ. of Illinois, Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Northeastern Center for Chemical Energy Storage (NECCES)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1210604
- Grant/Contract Number:
- SC0001294; SC0012583; AC02- 98CH10886
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; energy storage (including batteries and capacitors); defects; charge transport; materials and chemistry by design; synthesis (novel materials)
Citation Formats
Li, Linsen, Chen-Wiegart, Yu-chen Karen, Wang, Jiajun, Gao, Peng, Ding, Qi, Yu, Young-Sang, Wang, Feng, Cabana, Jordi, Wang, Jun, and Jin, Song. Visualization of electrochemically driven solid-state phase transformations using operando hard X-ray spectro-imaging. United States: N. p., 2015.
Web. doi:10.1038/ncomms7883.
Li, Linsen, Chen-Wiegart, Yu-chen Karen, Wang, Jiajun, Gao, Peng, Ding, Qi, Yu, Young-Sang, Wang, Feng, Cabana, Jordi, Wang, Jun, & Jin, Song. Visualization of electrochemically driven solid-state phase transformations using operando hard X-ray spectro-imaging. United States. https://doi.org/10.1038/ncomms7883
Li, Linsen, Chen-Wiegart, Yu-chen Karen, Wang, Jiajun, Gao, Peng, Ding, Qi, Yu, Young-Sang, Wang, Feng, Cabana, Jordi, Wang, Jun, and Jin, Song. Mon .
"Visualization of electrochemically driven solid-state phase transformations using operando hard X-ray spectro-imaging". United States. https://doi.org/10.1038/ncomms7883. https://www.osti.gov/servlets/purl/1210604.
@article{osti_1210604,
title = {Visualization of electrochemically driven solid-state phase transformations using operando hard X-ray spectro-imaging},
author = {Li, Linsen and Chen-Wiegart, Yu-chen Karen and Wang, Jiajun and Gao, Peng and Ding, Qi and Yu, Young-Sang and Wang, Feng and Cabana, Jordi and Wang, Jun and Jin, Song},
abstractNote = {In situ techniques with high temporal, spatial and chemical resolution are key to understand ubiquitous solid-state phase transformations, which are crucial to many technological applications. Hard X-ray spectro-imaging can visualize electrochemically driven phase transformations but demands considerably large samples with strong absorption signal so far. Here we show a conceptually new data analysis method to enable operando visualization of mechanistically relevant weakly absorbing samples at the nanoscale and study electrochemical reaction dynamics of iron fluoride, a promising high-capacity conversion cathode material. In two specially designed samples with distinctive microstructure and porosity, we observe homogeneous phase transformations during both discharge and charge, faster and more complete Li-storage occurring in porous polycrystalline iron fluoride, and further, incomplete charge reaction following a pathway different from conventional belief. In conclusion, these mechanistic insights provide guidelines for designing better conversion cathode materials to realize the promise of high-capacity lithium-ion batteries.},
doi = {10.1038/ncomms7883},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {Mon Apr 20 00:00:00 EDT 2015},
month = {Mon Apr 20 00:00:00 EDT 2015}
}
Web of Science
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