Interface coupling in FeOOH/MXene heterojunction for highly reversible lithium-ion storage. (March 2021)

• Record Type: Journal Article
• Authors: Ruan, Tingting; Wang, Bo; Lv, Qiang; Jiang, Yunpeng; Wang, Dianlong
• Is Part Of: Materials today energy. Volume 19(2021)
• Publication Date: 2021-03
• Subjects: MXene -- Quantum dots -- Heterojunction -- DFT calculations -- Electrochemical energy storage; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2020.100584
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Recently, MXene coupling with active nanomaterials show considerable potential for energy storage applications. However, the complicated fabrication of MXene-based composites and their low Li + storage reversibility impede the further application for lithium-ion batteries. Herein, as a proof of concept, a novel architecture of β -FeOOH quantum dots grafted on Ti3 C2 flakes has been realized via a one-step facile immersion method. The crumple Ti3 C2 MXene in the synthetic hybrids functions as a favorable matrix to load FeOOH dots due to its open framework, superior electrical conductivity, and low energy barrier of Li + diffusion. In virtue of the strong interfacial interactions of the formed heterojunctions between alkali-Ti3 C2 matrix and FeOOH, the hybrid enables the enhanced kinetics of charge transfer and stable interfacial structure. Consequently, the FeOOH@3D-MX electrode exhibits superior high-rate capability (286.1 mAh g −1 at 10 A g −1 ) and particularly durable lithium-ion storage with no capacity decay over 500 cycles (572.3 mAh g −1 after 500 cycles at 500 mA g −1 ). The enhanced Li + storage mechanism of FeOOH/MXene heterostructures is also evidenced by density functional theory calculations and kinetics analyses. This work exploits a facile strategy to build high-performance anode composite and paves the way to exploring their energy storage mechanisms. Graphical abstract: A three-dimensional Ti3 C2 framework coupling with FeOOH quantum dots is constructed via a simple one-step immersion approach with the strong interaction interfaces of FeOOH/MXene heterojunctions to promote the charge transfer kinetics and robust interfacial structure. Image 1 Highlights: A three-dimensional architecture is constructed via a one-step immersion strategy. A crumpled Ti3 C2 framework enables the homogenous dispersion of FeOOH dots. FeOOH dots contribute impressive capacity and inhibit the restack of Ti3 C2 sheets. Heterostructures with strong coupling interfaces endow highly reversible Li storage.