Ultrafast Li-ion migration in eggshell-inspired 2D@2D dual porous construction towards high rate energy storage. (December 2020)

• Record Type: Journal Article
• Authors: Zhu, Chengling; Hu, Danmei; Pan, Hui; Yuan, Hao; Li, Yao; Mao, Jianfeng; Guo, Zaiping; Chen, Zhixin; Imtiaz, Muhammad; Zhu, Shenmin
• Is Part Of: Carbon. Volume 170(2020)
• Page Start: 66
• Page End: 74
• Publication Date: 2020-12
• Subjects: Holey graphene -- Metal-organic frameworks -- Nanobelts -- 2D@2D porous structure -- Lithium-ion batteries; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2020.08.016
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The rate performance of lithium-ion batteries is vital to their practical applications in electronics and vehicles, but impeded by limited migration of Li + and electrons in solid anode materials. Inspired by the double-layer porous structure, a calciferous outer layer elegantly grown on a protein inner layer, of air-penetrable eggshells, a new composite is designed to have a 2D@2D dual porous architecture consisting of 2D holey graphene (hG) and 2D porous ZnFe2 O4 nanobelts (ZFOnb@hG). In the composite Zn–Fe hybrid Prussian blue analog was transformed into 2D porous ZnFe2 O4 nanobelts on a holey graphene matrix which acts as both template and substrate. The hG matrix in the dual porous structure can minimize Li + /electron transfer pathways and the 2D porous nanobelts consisting of ultrafine ZnFe2 O4 nanoparticles (3−4 nm) can efficiently buffer the volume change in both lateral and thickness directions during lithiation/delithiation. The resultant composite ZFOnb@hG exhibited an ultrahigh capacity of 1305 mA h g −1 after 250 cycles at 0.2 A g −1 and outstanding rate performance with excellent cycling stability of 703 mA h g −1 retained after 10000 cycles at 10 A g −1 . This biomimetic study opens up a new avenue for the development of high-capacity anode materials towards fast-charging capabilities. Graphical abstract: Image 1