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https://hdl.handle.net/2440/131988
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dc.contributor.author | Li, L. | - |
dc.contributor.author | Zhang, W. | - |
dc.contributor.author | Wang, X. | - |
dc.contributor.author | Zhang, S. | - |
dc.contributor.author | Liu, Y. | - |
dc.contributor.author | Li, M. | - |
dc.contributor.author | Zhu, G. | - |
dc.contributor.author | Zheng, Y. | - |
dc.contributor.author | Zhang, Q. | - |
dc.contributor.author | Zhou, T. | - |
dc.contributor.author | Pang, W.K. | - |
dc.contributor.author | Luo, W. | - |
dc.contributor.author | Guo, Z. | - |
dc.contributor.author | Yang, J. | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | ACS Nano, 2019; 13(7):7939-7948 | - |
dc.identifier.issn | 1936-0851 | - |
dc.identifier.issn | 1936-086X | - |
dc.identifier.uri | https://hdl.handle.net/2440/131988 | - |
dc.description.abstract | Due to the abundant potassium resource on the Earth’s crust, researchers now have become interested in exploring high-performance potassium-ion batteries (KIBs). However, the large size of K+ would hinder the diffusion of K ions into electrode materials, thus leading to poor energy/power density and cycling performance during the depotassiation/potassiation process. So, few-layered V5S8 nanosheets wrapping a hollow carbon sphere fabricated via a facile hollow carbon template induced method could reversibly accommodate K storage and maintain the structure stability. Hence, the as-obtained V5S8@C electrode enables rapid and reversible storage of K+ with a high specific capacity of 645 mAh/g at 50 mA/g, a high rate capability, and long cycling stability, with 360 and 190 mAh/g achieved after 500 and 1000 cycles at 500 and 2000 mA/g, respectively. The excellent electrochemical performance is superior to the most existing electrode materials. The DFT calculations reveal that V5S8 nanosheets have high electrical conductivity and low energy barriers for K+ intercalation. Furthermore, the reaction mechanism of the V5S8@C electrode in KIBs is probed via the in operando synchrotron X-ray diffraction technique, and it indicates that the V5S8@C electrode undergoes a sequential intercalation (KV5S8) and conversion reactions (K2S3) reversibly during the potassiation process. | - |
dc.description.statementofresponsibility | Li Li, Wenchao Zhang, Xing Wang, Shilin Zhang, Yajie Liu, Minhan Li, Guanjia Zhu, Yang Zheng, Qing Zhang, Tengfei Zhou, Wei Kong Pang, Wei Luo, Zaiping Guo and Jianping Yang | - |
dc.language.iso | en | - |
dc.publisher | American Chemical Society | - |
dc.rights | © 2019 American Chemical Society | - |
dc.source.uri | http://dx.doi.org/10.1021/acsnano.9b02384 | - |
dc.subject | potassium-ion batteries | - |
dc.subject | anode materials | - |
dc.subject | high power density | - |
dc.subject | cycling stability | - |
dc.subject | V5S8 nanosheets | - |
dc.title | Hollow-carbon-templated few-layered V₅S₈ nanosheets enabling ultrafast potassium storage and long-term cycling | - |
dc.title.alternative | Hollow-carbon-templated few-layered V5S8 nanosheets enabling ultrafast potassium storage and long-term cycling | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1021/acsnano.9b02384 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Zhang, S. [0000-0002-3268-5708] | - |
dc.identifier.orcid | Guo, Z. [0000-0003-3464-5301] | - |
Appears in Collections: | Chemical Engineering publications |
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