Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/153352
Title: High-rate and ultralong cycle-life potassium ion batteries enabled by in situ engineering of yolk–shell FeS₂@C structure on graphene matrix
Authors: Zhao, Yi
Zhu, Jiajie
Ong, Samuel Jun Hoong
Yao, Qianqian
Shi, Xiuling
Hou, Kun
Xu, Zhichuan Jason
Guan, Lunhui
Keywords: Engineering::Materials::Energy materials
Issue Date: 2018
Source: Zhao, Y., Zhu, J., Ong, S. J. H., Yao, Q., Shi, X., Hou, K., Xu, Z. J. & Guan, L. (2018). High-rate and ultralong cycle-life potassium ion batteries enabled by in situ engineering of yolk–shell FeS₂@C structure on graphene matrix. Advanced Energy Materials, 8(36), 1802565-. https://dx.doi.org/10.1002/aenm.201802565
Project: MOE2017-T2-1-009 
RG3/17(S) 
Journal: Advanced Energy Materials 
Abstract: The potassium-ion battery (PIB) represents a promising alternative to the lithium-ion battery for large-scale energy storage owing to the abundance and low cost of potassium. The lack of high performance anode materials is one of the bottlenecks for its success. The main challenge is the structural degradation caused by the huge volume expansion from insertion/extraction of potassium ions which are much larger than their lithium counterparts. Here, this challenge is tackled by in situ engineering of a yolk–shell FeS2@C structure on a graphene matrix. The yolk–shell structure provides interior void space for volume expansion and prevents the aggregation of FeS2. The conductive graphene matrix further enhances the charge transport within the composite. The PIB fabricated using this anode delivers high capacity, good rate capability (203 mA h g−1 at 10 A g−1), and remarkable long-term stability up to 1500 cycles at high rates. The performance is superior to most anode materials reported to date for PIBs. Further in-depth characterizations and density functional theory calculations reveal that the material displays reversible intercalation/deintercalation and conversion reactions during cycles, as well as the low diffusion energy barriers for the intercalation process. This work provides a new avenue to allow the proliferation of PIB anodes.
URI: https://hdl.handle.net/10356/153352
ISSN: 1614-6832
DOI: 10.1002/aenm.201802565
Rights: This is the peer reviewed version of the following article: Zhao, Y., Zhu, J., Ong, S. J. H., Yao, Q., Shi, X., Hou, K., Xu, Z. J. & Guan, L. (2018). High-rate and ultralong cycle-life potassium ion batteries enabled by in situ engineering of yolk–shell FeS₂@C structure on graphene matrix. Advanced Energy Materials, 8(36), 1802565-, which has been published in final form at https://doi.org/10.1002/aenm.201802565. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
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