Interlayer engineering in V6O13 nanobelts toward superior Mg-ion storage. Issue 2 (1st December 2022)

• Record Type: Journal Article
• Authors: Kong, Huabin; Ou, Jianxin; Chen, Lu; Sun, Wenlu; Fu, Fang; Zhang, Hui; Chen, Hongwei
• Is Part Of: Inorganic chemistry frontiers. Volume 10:Issue 2(2023)
• Page Start: 544
• Page End: 551
• Publication Date: 2022-12-01
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2qi02024f
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : The interlayer spacing of V6 O13 was adjusted by polyaniline intercalation for the first time to accelerate Mg 2+ transport kinetics. Abstract : Magnesium-ion batteries are considered as a potential candidate to replace lithium-ion batteries owing to their advantages such as high theoretical capacity, high natural abundance and favorable safety. However, the exploitation of desirable cathode materials suffers from sluggish Mg 2+ intercalation kinetics, resulting in poor specific capacity and terrible rate capability. Herein, an in situ polyaniline-intercalation strategy is developed to enlarge the interlayer distance of V6 O13, thus boosting the Mg 2+ intercalation kinetics. More critically, the strong coulombic interaction between divalent Mg 2+ and anions in the host materials is another key factor hindering the Mg 2+ diffusion kinetics, which can be effectively weakened by the π-conjugated structure of the polyaniline molecule. Reflected in magnesium-ion batteries, polyaniline-intercalated V6 O13 exhibits high reversible capacity, superior rate capability and outstanding cycling stability. Such a novel strategy can also be utilized widely in other layered structure materials, which opens up a new avenue for exploiting desirable multivalent-ion battery cathode materials.