气候变化领域集成服务门户(CCPortal): Self-assembled Ti3C2 MXene and N-rich porous carbon hybrids as superior anodes for high-performance potassium-ion batteries

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DOI	10.1039/c9ee03250a
	Self-assembled Ti3C2 MXene and N-rich porous carbon hybrids as superior anodes for high-performance potassium-ion batteries
	Zhao R.; Di H.; Hui X.; Zhao D.; Wang R.; Wang C.; Yin L.
发表日期	2020
ISSN	1754-5692
起始页码	246
结束页码	257
卷号	13 期号:1
英文摘要	Potassium-ion batteries (PIBs) are attracting increased attention because of their low cost and similar energy storage mechanism to lithium-ion batteries. Considering the low structural stability and poor electrochemical redox reaction kinetics resulting from the large size of K+ (1.38 Å), we elaborately designed novel PDDA-NPCN/Ti3C2 hybrids as PIBs anodes via an electrostatic attraction self-assembly approach, while N-rich porous carbon nanosheets (NPCNs) are derived from metal-hexamine frameworks. The coupled PDDA-NPCN/Ti3C2 hybrids with stacked structure and large specific surface area could ensure intimate contact between Ti3C2 and the NPCNs to efficiently take advantage of both components and more accessible active sites. The hybrids afford enlarged interlayer spacing and unique 3D interconnected conductive networks to accelerate the ionic/electronic transport rates. Meanwhile, the robust hybrids contribute high chemical stabilities due to favorable tolerance to volume change caused by phase transformations during the fast charge/discharge process. DFT calculations further indicate that the PDDA-NPCN/Ti3C2 hybrids efficiently reduce the adsorption energy of K+ and accelerate the reaction kinetics. The hybrids possess a remarkable synergetic effect, leading to a high reversible capacity of 358.4 mA h g-1 after 300 cycles at 0.1 A g-1 and long cycling stability of 252.2 mA h g-1 with only 0.03% degradation per cycle within 2000 cycles at 1.0 A g-1. This work paves the way for further self-assembled coupled hybrids in energy storage devices. © 2020 The Royal Society of Chemistry.
语种	英语
scopus关键词	Anodes; Association reactions; Carbon; Charging (batteries); Energy storage; Ions; Lithium-ion batteries; Porous materials; Potassium; Reaction kinetics; Redox reactions; Stability; Adsorption energies; Conductive networks; Electrochemical redox reactions; Electrostatic attractions; High reversible capacities; Interlayer spacings; Large specific surface areas; Structural stabilities; Titanium compounds; adsorption; cation; electrode; energy storage; performance assessment; porous medium; potassium; reaction kinetics; titanium; volume change
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162944
作者单位	Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, 250061, China
推荐引用方式 GB/T 7714	Zhao R.,Di H.,Hui X.,et al. Self-assembled Ti3C2 MXene and N-rich porous carbon hybrids as superior anodes for high-performance potassium-ion batteries[J],2020,13(1).
APA	Zhao R..,Di H..,Hui X..,Zhao D..,Wang R..,...&Yin L..(2020).Self-assembled Ti3C2 MXene and N-rich porous carbon hybrids as superior anodes for high-performance potassium-ion batteries.Energy and Environmental Science,13(1).
MLA	Zhao R.,et al."Self-assembled Ti3C2 MXene and N-rich porous carbon hybrids as superior anodes for high-performance potassium-ion batteries".Energy and Environmental Science 13.1(2020).