Inhomogeneous structural evolution of silver-containing Alpha-MnO2 nanorods in sodium-ion batteries investigated by comparative transmission electron microscopy approach
Abstract
Alpha-MnO2 is an attractive cathode candidate for sodium-ion batteries attributed to its unique one-dimensional 2×2 tunnels for facile sodium-ion diffusion, in addition to its incomparable cost advantage. In particular, α-MnO2 shows superior rate capability with silver stabilizing ions at the center of tunnels that improve electrical conductivity. In this work, we directly compare structural transformation of silver-containing α-MnO2 nanorods (Ag1.22Mn8O16-x or L-Ag-HOL and Ag1.66Mn8O16-y or H–Ag-HOL), containing higher and lower concentrations of oxygen vacancies respectively, by transmission electron microscopy (TEM). The elaborate comparative and statistical TEM studies eliminate concerns regarding generalization errors and facilitate rational structural development of nanorods with improved functionality. It is found that sodium ions favorably diffuse through the area where oxygen vacancies are concentrated, and the samples with more silver ions and fewer oxygen vacancies (H–Ag-HOL) show more significant structural deformation with more inhomogeneous sodiation. The difference in functional electrochemistry coupled with the observed difference in inter- and intra-nanorod inhomogeneous structural evolution emphasizes the significance of the uniform electrical conductivity of the electrode. This work helps to improve the α-MnO2 electrode material for sodium-ion batteries as well as suggesting the importance of delicate statistical approaches for TEM investigations.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States); Seoul National Univ., Seoul (Korea, Republic of)
- Stony Brook Univ., NY (United States). Dept. of Chemistry
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Stony Brook Univ., NY (United States). Dept. of Chemistry, and Dept. of Materials Science and Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States)
- Stony Brook Univ., NY (United States). Dept. of Chemistry, and Dept. of Materials Science and Chemical Engineering
- Seoul National Univ., Seoul (Korea, Republic of)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2mt); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1566823
- Alternate Identifier(s):
- OSTI ID: 1778392
- Report Number(s):
- BNL-212113-2019-JAAM
Journal ID: ISSN 0378-7753
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Power Sources
- Additional Journal Information:
- Journal Volume: 435; Journal Issue: C; Journal ID: ISSN 0378-7753
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 25 ENERGY STORAGE; Sodium ion battery; Manganese oxide; Transmission electron microscopy; Electrochemical reaction mechanism
Citation Formats
Lee, Seung-Yong, Housel, Lisa M., Huang, Jianping, Wu, Lijun, Takeuchi, Esther S., Marschilok, Amy C., Takeuchi, Kenneth J., Kim, Miyoung, and Zhu, Yimei. Inhomogeneous structural evolution of silver-containing Alpha-MnO2 nanorods in sodium-ion batteries investigated by comparative transmission electron microscopy approach. United States: N. p., 2019.
Web. doi:10.1016/j.jpowsour.2019.226779.
Lee, Seung-Yong, Housel, Lisa M., Huang, Jianping, Wu, Lijun, Takeuchi, Esther S., Marschilok, Amy C., Takeuchi, Kenneth J., Kim, Miyoung, & Zhu, Yimei. Inhomogeneous structural evolution of silver-containing Alpha-MnO2 nanorods in sodium-ion batteries investigated by comparative transmission electron microscopy approach. United States. https://doi.org/10.1016/j.jpowsour.2019.226779
Lee, Seung-Yong, Housel, Lisa M., Huang, Jianping, Wu, Lijun, Takeuchi, Esther S., Marschilok, Amy C., Takeuchi, Kenneth J., Kim, Miyoung, and Zhu, Yimei. Thu .
"Inhomogeneous structural evolution of silver-containing Alpha-MnO2 nanorods in sodium-ion batteries investigated by comparative transmission electron microscopy approach". United States. https://doi.org/10.1016/j.jpowsour.2019.226779. https://www.osti.gov/servlets/purl/1566823.
@article{osti_1566823,
title = {Inhomogeneous structural evolution of silver-containing Alpha-MnO2 nanorods in sodium-ion batteries investigated by comparative transmission electron microscopy approach},
author = {Lee, Seung-Yong and Housel, Lisa M. and Huang, Jianping and Wu, Lijun and Takeuchi, Esther S. and Marschilok, Amy C. and Takeuchi, Kenneth J. and Kim, Miyoung and Zhu, Yimei},
abstractNote = {Alpha-MnO2 is an attractive cathode candidate for sodium-ion batteries attributed to its unique one-dimensional 2×2 tunnels for facile sodium-ion diffusion, in addition to its incomparable cost advantage. In particular, α-MnO2 shows superior rate capability with silver stabilizing ions at the center of tunnels that improve electrical conductivity. In this work, we directly compare structural transformation of silver-containing α-MnO2 nanorods (Ag1.22Mn8O16-x or L-Ag-HOL and Ag1.66Mn8O16-y or H–Ag-HOL), containing higher and lower concentrations of oxygen vacancies respectively, by transmission electron microscopy (TEM). The elaborate comparative and statistical TEM studies eliminate concerns regarding generalization errors and facilitate rational structural development of nanorods with improved functionality. It is found that sodium ions favorably diffuse through the area where oxygen vacancies are concentrated, and the samples with more silver ions and fewer oxygen vacancies (H–Ag-HOL) show more significant structural deformation with more inhomogeneous sodiation. The difference in functional electrochemistry coupled with the observed difference in inter- and intra-nanorod inhomogeneous structural evolution emphasizes the significance of the uniform electrical conductivity of the electrode. This work helps to improve the α-MnO2 electrode material for sodium-ion batteries as well as suggesting the importance of delicate statistical approaches for TEM investigations.},
doi = {10.1016/j.jpowsour.2019.226779},
journal = {Journal of Power Sources},
number = C,
volume = 435,
place = {United States},
year = {2019},
month = {7}
}
Web of Science
Figures / Tables:

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Figures / Tables found in this record: