Revealing the Charge Storage Mechanism in Porous Carbon to Achieve Efficient K Ion Storage
© 2024 Wiley‐VCH GmbH..
Constructing a porous structure is considered an appealing strategy to improve the electrochemical properties of carbon anodes for potassium-ion batteries (PIBs). Nevertheless, the correlation between electrochemical K-storage performance and pore structure has not been well elucidated, which hinders the development of high-performance carbon anodes. Herein, various porous carbons are synthesized with porosity structures ranging from micropores to micro/mesopores and mesopores, and systematic investigations are conducted to establish a relationship between pore characteristics and K-storage performance. It is found that micropores fail to afford accessible active sites for K ion storage, whereas mesopores can provide abundant surface adsorption sites, and the enlarged interlayer spacing facilitates the intercalation process, thus resulting in significantly improved K-storage performances. Consequently, PCa electrode with a prominent mesoporous structure achieves the highest reversible capacity of 421.7 mAh g-1 and an excellent rate capability of 191.8 mAh g-1 at 5 C. Furthermore, the assembled potassium-ion hybrid capacitor realizes an impressive energy density of 151.7 Wh kg-1 at a power density of 398 W kg-1. The proposed work not only deepens the understanding of potassium storage in carbon materials with distinctive porosities but also paves a path toward developing high-performance anodes for PIBs with customized energy storage capabilities.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - year:2024 |
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| Enthalten in: |
Small (Weinheim an der Bergstrasse, Germany) - (2024) vom: 25. März, Seite e2401478 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Jiang, Mingchi [VerfasserIn] |
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| Links: |
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| Themen: |
Anodes |
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| Anmerkungen: |
Date Revised 26.03.2024 published: Print-Electronic Citation Status Publisher |
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| doi: |
10.1002/smll.202401478 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM370179439 |
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| 520 | |a © 2024 Wiley‐VCH GmbH. | ||
| 520 | |a Constructing a porous structure is considered an appealing strategy to improve the electrochemical properties of carbon anodes for potassium-ion batteries (PIBs). Nevertheless, the correlation between electrochemical K-storage performance and pore structure has not been well elucidated, which hinders the development of high-performance carbon anodes. Herein, various porous carbons are synthesized with porosity structures ranging from micropores to micro/mesopores and mesopores, and systematic investigations are conducted to establish a relationship between pore characteristics and K-storage performance. It is found that micropores fail to afford accessible active sites for K ion storage, whereas mesopores can provide abundant surface adsorption sites, and the enlarged interlayer spacing facilitates the intercalation process, thus resulting in significantly improved K-storage performances. Consequently, PCa electrode with a prominent mesoporous structure achieves the highest reversible capacity of 421.7 mAh g-1 and an excellent rate capability of 191.8 mAh g-1 at 5 C. Furthermore, the assembled potassium-ion hybrid capacitor realizes an impressive energy density of 151.7 Wh kg-1 at a power density of 398 W kg-1. The proposed work not only deepens the understanding of potassium storage in carbon materials with distinctive porosities but also paves a path toward developing high-performance anodes for PIBs with customized energy storage capabilities | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a K‐storage mechanisms | |
| 650 | 4 | |a anodes | |
| 650 | 4 | |a porous carbons | |
| 650 | 4 | |a potassium‐ion batteries | |
| 700 | 1 | |a Sun, Ning |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Tianyu |e verfasserin |4 aut | |
| 700 | 1 | |a Yu, Jiaxu |e verfasserin |4 aut | |
| 700 | 1 | |a Somoro, Razium Ali |e verfasserin |4 aut | |
| 700 | 1 | |a Jia, Mengqiu |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Bin |e verfasserin |4 aut | |
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