Hierarchical sandwich-type tungsten trioxide nanoplatelets/graphene anode for high-performance lithium-ion batteries with long cycle life. (1st February 2016)

• Record Type: Journal Article
• Authors: Zeng, Fanyan; Ren, Yufei; Chen, Li; Yang, Yong; Li, Qinliang; Gu, Gang
• Is Part Of: Electrochimica acta. Volume 190(2016)
• Page Start: 964
• Page End: 971
• Publication Date: 2016-02-01
• Subjects: Graphene -- Tungsten trioxide -- Nanoplatelets -- Hierarchical sandwich-type architecture -- Lithium ion batteries; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.12.109
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: A layer-by-layer assembled 3D sandwich-type architecture composed of 2D GS and 2D TTNPs exhibits superior lithium-ion storage performance and long cycle life (847 mA h g −1 at 72 mA g −1, and 615 mA h g −1 with 118.9% capacity retention at 1800 mA g −1 after 1000 cycles). Highlights: A facile strategy is developed to synthesize a 3D sandwich-type TTNPs-GS. Hierarchical sandwich-type TTNPs-GS is composed of 2D GS and 2D TTNPs. Flexible GS and sandwich-type architecture are very favorable to protect TTNPs. TTNPs-GS shows large capacity, high rate capability and long cycle life. Abstract: Transition metal oxide-based anodes suffer from poor rate capability and cyclic stability owing to their low electronic conductivity and large volume change for lithium ion batteries (LIBs). Sandwich-type structure based on two-dimensional (2D) graphene (GS) and 2D transition-metal oxide nanosheets could offer many potential advantages in electrochemical energy storage field. In this study, we demonstrate a facile process to fabricate a layer-by-layer assembled 3D hierarchical sandwich-type architecture composed of 2D tungsten trioxide nanoplatelets and graphene (denoted as TTNPs-GS). When evaluated as anode materials, the sandwich-type architecture plays vital roles in endowing high electronic conductivity, accommodating large volume variation and achieving abundant ion transport paths, thus enabling superior lithium-ion storage performance. TTNPs-GS shows a good reversible capacity of 847 mA h g −1 (theoretical capacity of 693 mA h g −1 for tungsten trioxide), high-rate capability (292 mA h g −1 at 3600 mA g −1 ) and long cycle life (615 mA h g −1 with 118.9% capacity retention at 1080 mA g −1 after 1000 cycles).