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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201802074
|2 doi
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|a pubmed24n0953.xml
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|e rakwb
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|a eng
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|a Wang, Yunsong
|e verfasserin
|4 aut
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|a Hyperporous Sponge Interconnected by Hierarchical Carbon Nanotubes as a High-Performance Potassium-Ion Battery Anode
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|c 2018
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 21.08.2018
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Recently, commercial graphite and other carbon-based materials have shown promising properties as the anode for potassium-ion batteries. A fundamental problem related to those carbon electrodes, significant volume expansion, and structural instability/collapsing caused by cyclic K-ion intercalation, remains unsolved and severely limits further development and applications of K-ion batteries. Here, a multiwalled hierarchical carbon nanotube (HCNT) is reported to address the issue, and a reversible specific capacity of 232 mAh g-1 , excellent rate capability, and cycling stability for 500 cycles are achieved. The key structure of the HCNTs consists of an inner CNT with dense-stacked graphitic walls and a loose-stacked outer CNT with more disordered walls, and individual HCNTs are further interconnected into a hyperporous bulk sponge with huge macropore volume, high conductivity, and tunable modulus. It is discovered that the inner dense-CNT serves as a robust skeleton, and collectively, the outer loose-CNT is beneficial for K-ion accommodation; meanwhile the hyperporous sponge facilitates reaction kinetics and offers stable surface capacitive behavior. The hierarchical carbon nanotube structure has great potential in developing high-performance and stable-structure electrodes for next generation K and other metal-ion batteries
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|a Journal Article
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|a K-ion batteries
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|a hierarchical carbon nanotubes
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|a hyperporous sponges
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| 650 |
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4 |
|a structure stability
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1 |
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|a Wang, Zhipeng
|e verfasserin
|4 aut
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1 |
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|a Chen, Yijun
|e verfasserin
|4 aut
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1 |
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|a Zhang, Hui
|e verfasserin
|4 aut
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|a Yousaf, Muhammad
|e verfasserin
|4 aut
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1 |
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|a Wu, Huaisheng
|e verfasserin
|4 aut
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1 |
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|a Zou, Mingchu
|e verfasserin
|4 aut
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1 |
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|a Cao, Anyuan
|e verfasserin
|4 aut
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| 700 |
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|a Han, Ray P S
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 30(2018), 32 vom: 17. Aug., Seite e1802074
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|g volume:30
|g year:2018
|g number:32
|g day:17
|g month:08
|g pages:e1802074
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|u http://dx.doi.org/10.1002/adma.201802074
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