Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| A nonaqueous potassium-ion hybrid capacitor enabled by two-dimensional diffusion pathways of dipotassium terephthalate | |
Luo, Yuwen1,2; Liu, Luojia2; Lei, Kaixiang2; Shi, Jifu3 ; Xu, Gang1; Li, Fujun2; Chen, Jun2
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| 2019-02-21 | |
| Source Publication | CHEMICAL SCIENCE
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| ISSN | 2041-6520 |
| Volume | 10Issue:7Pages:2048-2052 |
| Corresponding Author | Shi, Jifu(shijifu2017@126.com) ; Li, Fujun(fujunli@nankai.edu.cn) |
| Abstract | Nonaqueous potassium-ion hybrid capacitors (KIHCs) are faced with limited redox reaction kinetics of electrodes for accommodation of large-sized K+. Here, dipotassium terephthalate (K2TP) is applied as an organic negative electrode to provide comparable reaction kinetics with a non-faradaic activated carbon (AC) positive electrode to boost the electrochemical performance of KIHCs. It is revealed that the large exchange current density and fast two-dimensional (2D) diffusion pathways of K+ in K2TP determined by density functional theory (DFT) calculations ensure its fast redox reaction and transport kinetics. The asconstructed KIHC presents both high energy and power densities of 101 W h kg(-1) and 2160 W kg(-1) based on the mass of the two electrodes (41.5 W h kg(-1) and 885.2 W kg(-1) based on the mass of the two electrodes and electrolyte), respectively, and a superior capacity retention of 97.7% after 500 cycles. The excellent electrochemical performance is attributed to the fast kinetics, good structural flexibility, and small volume change (9.4%) of K2TP upon K+ insertion/extraction, and its good compatibility with the AC positive electrode in 1,2-dimethoxyethane (DME)-based electrolyte. This will promote application of organic materials in hybrid capacitors and the development of KIHCs. |
| DOI | 10.1039/c8sc04489a |
| WOS Keyword | ELECTRODES ; NANOWIRES ; ANODES |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[21603108] ; National Natural Science Foundation of China[21673243] ; Fundamental Funds for the Central Universities ; NSFC-RGC Joint Program[51761165025] |
| WOS Research Area | Chemistry |
| Funding Organization | National Natural Science Foundation of China ; Fundamental Funds for the Central Universities ; NSFC-RGC Joint Program |
| WOS Subject | Chemistry, Multidisciplinary |
| WOS ID | WOS:000458907300013 |
| Publisher | ROYAL SOC CHEMISTRY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/24543 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Shi, Jifu; Li, Fujun |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Nankai Univ, Coll Chem, Key Lab Adv Energy Mat Chem, Minist Educ, Tianjin 300071, Peoples R China 3.Jinan Univ, Dept Phys, Siyuan Lab, Guangzhou 510632, Guangdong, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Luo, Yuwen,Liu, Luojia,Lei, Kaixiang,et al. A nonaqueous potassium-ion hybrid capacitor enabled by two-dimensional diffusion pathways of dipotassium terephthalate[J]. CHEMICAL SCIENCE,2019,10(7):2048-2052. |
| APA | Luo, Yuwen.,Liu, Luojia.,Lei, Kaixiang.,Shi, Jifu.,Xu, Gang.,...&Chen, Jun.(2019).A nonaqueous potassium-ion hybrid capacitor enabled by two-dimensional diffusion pathways of dipotassium terephthalate.CHEMICAL SCIENCE,10(7),2048-2052. |
| MLA | Luo, Yuwen,et al."A nonaqueous potassium-ion hybrid capacitor enabled by two-dimensional diffusion pathways of dipotassium terephthalate".CHEMICAL SCIENCE 10.7(2019):2048-2052. |
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