Details
| Original language | English |
|---|---|
| Pages (from-to) | 2433-2442 |
| Number of pages | 10 |
| Journal | Energy and Environmental Science |
| Volume | 12 |
| Issue number | 8 |
| Early online date | 2 May 2019 |
| Publication status | Published - 1 Aug 2019 |
Abstract
In the present work, a new class of high entropy materials for energy storage applications is introduced. Multi-anionic and -cationic compounds are prepared by facile mechanochemistry using a recently designed multi-cationic transition-metal-based high entropy oxide as the precursor and LiF or NaCl as the reactant, leading to formation of lithiated or sodiated materials. Notably, the Li-containing entropy-stabilized oxyfluoride described herein (Lix(Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)OFx) exhibits a working potential of 3.4 V vs. Li+/Li, enabling its use as a cathode active material. Unlike conventional (non-entropy-stabilized) oxyfluorides, this new material shows enhanced Li storage properties due to entropy stabilization, which, in general, facilitates tailoring the cycling performance by varying the constituent elements in yet unprecedented ways. In addition, we demonstrate that the concept of entropy stabilization is also applicable to Na-containing oxychlorides with a rock-salt structure, thus paving the way toward development of (next-generation) post-Li battery technologies.
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Chemistry
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Nuclear Energy and Engineering
- Environmental Science(all)
- Pollution
Sustainable Development Goals
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In: Energy and Environmental Science, Vol. 12, No. 8, 01.08.2019, p. 2433-2442.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Multi-anionic and -cationic compounds: new high entropy materials for advanced Li-ion batteries
AU - Wang, Qingsong
AU - Sarkar, Abhishek
AU - Wang, Di
AU - Velasco, Leonardo
AU - Azmi, Raheleh
AU - Bhattacharya, Subramshu S.
AU - Bergfeldt, Thomas
AU - Düvel, Andre
AU - Heitjans, Paul
AU - Brezesinski, Torsten
AU - Hahn, Horst
AU - Breitung, Ben
N1 - Funding Information: Q. W. acknowledges financial support by EnABLES. This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement no. 730957. H. H. and A. S. acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation, under contract HA 1344/43-1). P. H. is grateful to Niedersächsisches Ministerium für Wissenschaft und Kultur (MWK) for a Niedersachsen Professorship (VWZN3095) and A. D. acknowledges financial support by DFG (DU 1668/3-1). The K-Alpha+ was financially supported by the Federal Ministry of Economics and Energy (BMWi). Dr Julia Maibach (from IAM-ESS, KIT) is acknowledged for access to XPS laboratory.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - In the present work, a new class of high entropy materials for energy storage applications is introduced. Multi-anionic and -cationic compounds are prepared by facile mechanochemistry using a recently designed multi-cationic transition-metal-based high entropy oxide as the precursor and LiF or NaCl as the reactant, leading to formation of lithiated or sodiated materials. Notably, the Li-containing entropy-stabilized oxyfluoride described herein (Lix(Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)OFx) exhibits a working potential of 3.4 V vs. Li+/Li, enabling its use as a cathode active material. Unlike conventional (non-entropy-stabilized) oxyfluorides, this new material shows enhanced Li storage properties due to entropy stabilization, which, in general, facilitates tailoring the cycling performance by varying the constituent elements in yet unprecedented ways. In addition, we demonstrate that the concept of entropy stabilization is also applicable to Na-containing oxychlorides with a rock-salt structure, thus paving the way toward development of (next-generation) post-Li battery technologies.
AB - In the present work, a new class of high entropy materials for energy storage applications is introduced. Multi-anionic and -cationic compounds are prepared by facile mechanochemistry using a recently designed multi-cationic transition-metal-based high entropy oxide as the precursor and LiF or NaCl as the reactant, leading to formation of lithiated or sodiated materials. Notably, the Li-containing entropy-stabilized oxyfluoride described herein (Lix(Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)OFx) exhibits a working potential of 3.4 V vs. Li+/Li, enabling its use as a cathode active material. Unlike conventional (non-entropy-stabilized) oxyfluorides, this new material shows enhanced Li storage properties due to entropy stabilization, which, in general, facilitates tailoring the cycling performance by varying the constituent elements in yet unprecedented ways. In addition, we demonstrate that the concept of entropy stabilization is also applicable to Na-containing oxychlorides with a rock-salt structure, thus paving the way toward development of (next-generation) post-Li battery technologies.
UR - http://www.scopus.com/inward/record.url?scp=85070996920&partnerID=8YFLogxK
U2 - 10.1039/c9ee00368a
DO - 10.1039/c9ee00368a
M3 - Article
AN - SCOPUS:85070996920
VL - 12
SP - 2433
EP - 2442
JO - Energy and Environmental Science
JF - Energy and Environmental Science
SN - 1754-5692
IS - 8
ER -