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https://hdl.handle.net/2440/132778
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Type: | Journal article |
Title: | Graphitic carbon nanocage as a stable and high power anode for potassium-ion batteries |
Author: | Cao, B. Zhang, Q. Liu, H. Xu, B. Zhang, S. Zhou, T. Mao, J. Pang, W.K. Guo, Z. Li, A. Zhou, J. Chen, X. Song, H. |
Citation: | Advanced Energy Materials, 2018; 8(25):1801149-1-1801149-7 |
Publisher: | Wiley |
Issue Date: | 2018 |
ISSN: | 1614-6832 1614-6840 |
Statement of Responsibility: | Bin Cao, Qing Zhang, Huan Liu, Bin Xu, Shilin Zhang, Tengfei Zhou, Jianfeng Mao, Wei Kong Pang, Zaiping Guo, Ang Li, Jisheng Zhou, Xiaohong Chen, and Huaihe Song |
Abstract: | As an emerging electrochemical energy storage device, potassium-ion batteries (PIBs) have drawn growing interest due to the resource-abundance and low cost of potassium. Graphite-based materials, as the most common anodes for commercial Li-ion batteries, have a very low capacity when used an anode for Na-ion batteries, but they show reasonable capacities as anodes for PIBs. The practical application of graphitic materials in PIBs suffers from poor cyclability, however, due to the large interlayer expansion/shrinkage caused by the intercalation/deintercalation of potassium ions. Here, a highly graphitic carbon nanocage (CNC) is reported as a PIBs anode, which exhibits excellent cyclability and superior depotassiation capacity of 175 mAh g⁻¹ at 35 C. The potassium storage mechanism in CNC is revealed by cyclic voltammetry as due to redox reactions (intercalation/deintercalation) and double-layer capacitance (surface adsorption/desorption). The present results give new insights into structural design for graphitic anode materials in PIBs and understanding the double-layer capacitance effect in alkali metal ion batteries. |
Keywords: | Anodes; carbon nanocages; cyclability; potassium-ion batteries; rate capability |
Rights: | © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/aenm.201801149 |
Grant ID: | http://purl.org/au-research/grants/arc/DP170102406 |
Published version: | http://dx.doi.org/10.1002/aenm.201801149 |
Appears in Collections: | Chemical Engineering publications |
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