Atomistic Insights of Irreversible Li+ Intercalation in MnO2 Electrode
Abstract
Tunnel-structured MnO2 represents open-framed electrode materials for reversible energy storage. Its wide application is limited by its poor cycling stability, whose structural origin is unclear. We tracked the structure evolution of β-MnO2 upon Li+ ion insertion/extraction by combining advanced in situ diagnostic tools at both electrode level (synchrotron X-ray scattering) and single-particle level (transmission electron microscopy). The instability is found to originate from a partially reversible phase transition between β-MnO2 and orthorhombic LiMnO2 upon lithiation, causing cycling capacity decay. Moreover, the MnO2/LiMnO2 interface exhibits multiple arrow-headed disordered regions, which severely chop into the host and undermine its structural integrity. Our findings could account for the cycling instability of tunnel-structured materials, based on which future strategies should focus on tuning the charge transport kinetics toward performance enhancement.
- Authors:
-
[5]
- Wenzhou University (China); Univ. of Chicago, IL (United States)
- Univ. of Chicago, IL (United States)
- Wenzhou University (China)
- Mohammed VI Polytechnic University Ben Guerir (Morocco)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1875525
- Grant/Contract Number:
- AC02-06CH11357; 52002287
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition); Journal Volume: 61; Journal Issue: 2; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 25 ENERGY STORAGE; tunnel; MnO2; lithium ion battery; in situ TEM; phase transition
Citation Formats
He, Kun, Yuan, Yifei, Yao, Wentao, You, Kun, Dahbi, Mouad, Alami, Jones, Amine, Khalil, Shahbazian‐Yassar, Reza, and Lu, Jun. Atomistic Insights of Irreversible Li+ Intercalation in MnO2 Electrode. United States: N. p., 2021.
Web. doi:10.1002/anie.202113420.
He, Kun, Yuan, Yifei, Yao, Wentao, You, Kun, Dahbi, Mouad, Alami, Jones, Amine, Khalil, Shahbazian‐Yassar, Reza, & Lu, Jun. Atomistic Insights of Irreversible Li+ Intercalation in MnO2 Electrode. United States. https://doi.org/10.1002/anie.202113420
He, Kun, Yuan, Yifei, Yao, Wentao, You, Kun, Dahbi, Mouad, Alami, Jones, Amine, Khalil, Shahbazian‐Yassar, Reza, and Lu, Jun. Thu .
"Atomistic Insights of Irreversible Li+ Intercalation in MnO2 Electrode". United States. https://doi.org/10.1002/anie.202113420. https://www.osti.gov/servlets/purl/1875525.
@article{osti_1875525,
title = {Atomistic Insights of Irreversible Li+ Intercalation in MnO2 Electrode},
author = {He, Kun and Yuan, Yifei and Yao, Wentao and You, Kun and Dahbi, Mouad and Alami, Jones and Amine, Khalil and Shahbazian‐Yassar, Reza and Lu, Jun},
abstractNote = {Tunnel-structured MnO2 represents open-framed electrode materials for reversible energy storage. Its wide application is limited by its poor cycling stability, whose structural origin is unclear. We tracked the structure evolution of β-MnO2 upon Li+ ion insertion/extraction by combining advanced in situ diagnostic tools at both electrode level (synchrotron X-ray scattering) and single-particle level (transmission electron microscopy). The instability is found to originate from a partially reversible phase transition between β-MnO2 and orthorhombic LiMnO2 upon lithiation, causing cycling capacity decay. Moreover, the MnO2/LiMnO2 interface exhibits multiple arrow-headed disordered regions, which severely chop into the host and undermine its structural integrity. Our findings could account for the cycling instability of tunnel-structured materials, based on which future strategies should focus on tuning the charge transport kinetics toward performance enhancement.},
doi = {10.1002/anie.202113420},
journal = {Angewandte Chemie (International Edition)},
number = 2,
volume = 61,
place = {United States},
year = {Thu Nov 25 00:00:00 EST 2021},
month = {Thu Nov 25 00:00:00 EST 2021}
}
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