Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.nanoen.2020.104482
Title: Building vertically-structured, high-performance electrodes by interlayer-confined reactions in accordion-like, chemically expanded graphite
Authors: Dong, Lei
Zhang, Long
Lin, Shan
Chen, Zhongxin 
Wang, Yannan
Zhao, Xiaoxu 
Wu, Tianqi
Zhang, Jiajia
Liu, Wei
Lu, Hongbin
Loh, Kian Ping 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
Vertically-structured electrode
Energy storage
Interlayer-confined reaction
Ion-transport
Chemically-expanded graphite
GRAPHENE
CONSTRUCTION
CAPACITANCE
NANOWALLS
DIFFUSION
DESIGN
ARRAYS
CARBON
Issue Date: 1-Apr-2020
Publisher: ELSEVIER
Citation: Dong, Lei, Zhang, Long, Lin, Shan, Chen, Zhongxin, Wang, Yannan, Zhao, Xiaoxu, Wu, Tianqi, Zhang, Jiajia, Liu, Wei, Lu, Hongbin, Loh, Kian Ping (2020-04-01). Building vertically-structured, high-performance electrodes by interlayer-confined reactions in accordion-like, chemically expanded graphite. NANO ENERGY 70. ScholarBank@NUS Repository. https://doi.org/10.1016/j.nanoen.2020.104482
Abstract: © 2020 Graphene has attracted major interests as electrode materials for energy storage applications. However, the major limitation of using blade- or spin-coated graphene films for fabricating electrode is that the basal plane of the flat-lying graphene is orthogonal to the direction of charge transport, causing sluggish charge transfer kinetics for the coated graphene film. Here we propose a general, scalable strategy to prepare vertically-structured hybrid electrodes using accordion-like, chemically expanded graphite (CEG). The coated CEG rods possess two-dimensional (2D) interlayer galleries that are vertically aligned with respect to the substrate because of their large length-diameter ratio, which facilitates high-efficiency ion transport. Due to its excellent wettability and high electrochemical surface areas, these interlayer galleries allow a high loading of redox-active (RA) materials, including metal (Pt), metal hydroxide (Ni(OH)2, Fe2O3 and MnO2) or metal dichalcogenide (MoS2). As an example, Ni(OH)2-infiltrated CEG shows excellent rate-performance and long-term cycling stability when used as electrochemical electrodes in lithium-ion batteries and supercapacitors.
Source Title: NANO ENERGY
URI: https://scholarbank.nus.edu.sg/handle/10635/168830
ISSN: 22112855
22113282
DOI: 10.1016/j.nanoen.2020.104482
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