Ma, Yanjiao ; Ma, Yuan ; Dreyer, Sören Lukas ; Wang, Qingsong ; Wang, Kai ; Goonetilleke, Damian ; Omar, Ahmad ; Mikhailova, Daria ; Hahn, Horst ; Breitung, Ben ; Brezesinski, Torsten (2021)
High‐entropy metal–organic frameworks for highly reversible sodium storage.
In: Advanced Materials, 33 (34)
doi: 10.1002/adma.202101342
Article, Bibliographie
This is the latest version of this item.
Abstract
Prussian blue analogues (PBAs) are reported to be efficient sodium storage materials because of the unique advantages of their metal–organic framework structure. However, the issues of low specific capacity and poor reversibility, caused by phase transitions during charge/discharge cycling, have thus far limited the applicability of these materials. Herein, a new approach is presented to substantially improve the electrochemical properties of PBAs by introducing high entropy into the crystal structure. To achieve this, five different metal species are introduced, sharing the same nitrogen‐coordinated site, thereby increasing the configurational entropy of the system beyond 1.5R. By careful selection of the elements, high‐entropy PBA (HE‐PBA) presents a quasi‐zero‐strain reaction mechanism, resulting in increased cycling stability and rate capability. The key to such improvement lies in the high entropy and associated effects as well as the presence of several active redox centers. The gassing behavior of PBAs is also reported. Evolution of dimeric cyanogen due to oxidation of the cyanide ligands is detected, which can be attributed to the structural degradation of HE‐PBA during battery operation. By optimizing the electrochemical window, a Coulombic efficiency of nearly 100% is retained after cycling for more than 3000 cycles.
| Item Type: | Article |
|---|---|
| Erschienen: | 2021 |
| Creators: | Ma, Yanjiao ; Ma, Yuan ; Dreyer, Sören Lukas ; Wang, Qingsong ; Wang, Kai ; Goonetilleke, Damian ; Omar, Ahmad ; Mikhailova, Daria ; Hahn, Horst ; Breitung, Ben ; Brezesinski, Torsten |
| Type of entry: | Bibliographie |
| Title: | High‐entropy metal–organic frameworks for highly reversible sodium storage |
| Language: | English |
| Date: | 2021 |
| Place of Publication: | Weinheim |
| Publisher: | Wiley-VCH |
| Journal or Publication Title: | Advanced Materials |
| Volume of the journal: | 33 |
| Issue Number: | 34 |
| Collation: | 10 Seiten |
| DOI: | 10.1002/adma.202101342 |
| Corresponding Links: | |
| Abstract: | Prussian blue analogues (PBAs) are reported to be efficient sodium storage materials because of the unique advantages of their metal–organic framework structure. However, the issues of low specific capacity and poor reversibility, caused by phase transitions during charge/discharge cycling, have thus far limited the applicability of these materials. Herein, a new approach is presented to substantially improve the electrochemical properties of PBAs by introducing high entropy into the crystal structure. To achieve this, five different metal species are introduced, sharing the same nitrogen‐coordinated site, thereby increasing the configurational entropy of the system beyond 1.5R. By careful selection of the elements, high‐entropy PBA (HE‐PBA) presents a quasi‐zero‐strain reaction mechanism, resulting in increased cycling stability and rate capability. The key to such improvement lies in the high entropy and associated effects as well as the presence of several active redox centers. The gassing behavior of PBAs is also reported. Evolution of dimeric cyanogen due to oxidation of the cyanide ligands is detected, which can be attributed to the structural degradation of HE‐PBA during battery operation. By optimizing the electrochemical window, a Coulombic efficiency of nearly 100% is retained after cycling for more than 3000 cycles. |
| Uncontrolled Keywords: | gassing behavior, high‐entropy materials, Prussian blue analogues, secondary batteries, sodium‐ion cathodes |
| Identification Number: | 2101342 |
| Classification DDC: | 600 Technology, medicine, applied sciences > 660 Chemical engineering |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials |
| Date Deposited: | 23 Jan 2024 08:57 |
| Last Modified: | 23 Jan 2024 08:57 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
Available Versions of this Item
-
High‐Entropy Metal–Organic Frameworks for Highly Reversible Sodium Storage. (deposited 22 Jan 2024 13:36)
- High‐entropy metal–organic frameworks for highly reversible sodium storage. (deposited 23 Jan 2024 08:57) [Currently Displayed]
 |
Send an inquiry |
Options (only for editors)
 |
Show editorial Details |
Drucken
Impressum