材料科学
阳极
石墨烯
储能
电极
纳米技术
纳米片
纳米颗粒
多孔性
电导率
化学工程
复合材料
化学
量子力学
物理
工程类
物理化学
功率(物理)
作者
Zhiyuan Sang,Xiao Yan,Dong Su,Huiming Ji,Sihui Wang,Shi Xue Dou,Ji Liang
出处
期刊:Small
[Wiley]
日期:2020-05-20
卷期号:16 (25)
被引量:24
标识
DOI:10.1002/smll.202001265
摘要
Abstract The design and construction of flexible electrodes that can function at high rates and high areal capacities are essential regarding the practical application of flexible sodium‐ion batteries (SIBs) and other energy storage devices, which remains significantly challenging by far. Herein, a flexible and 3D porous graphene nanosheet/SnS 2 (3D‐GNS/SnS 2 ) film is reported as a high‐performance SIB electrode. In this hybrid film, the GNS/SnS 2 microblocks serve as pillars to assemble into a 3D porous and interconnected framework, enabling fast electron/ion transport; while the GNS bridges the GNS/SnS 2 microblocks into a flexible framework to provide satisfactorily mechanical strength and long‐range conductivity. Moreover, the SnS 2 nanocrystals, which chemically bond with GNS, provide sufficient active sites for Na storage and ensure the cycling stability. Consequently, this flexible 3D‐GNS/SnS 2 film exhibits excellent Na‐storage performances, especially in terms of high areal capacity (2.45 mAh cm −2 ) and high rates with superior stability (385 mAh g −1 at 1.0 A g −1 over 1000 cycles with ≈100% retention). A flexible SIB full cell using this anode exhibits high and stable performance under various bending situations. Thus, this work provide a feasible route to prepare flexible electrodes with high practical viability for not only SIBs but also other energy storage devices.
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