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Fe3O4 nano assembly embedded in 2D-crumpled porous carbon sheets for high energy density supercapacitor

Authors
Venkateswarlu, S.Mahajan, H.Panda, A.Lee, JihyunGovindaraju, S.Yun, KyusikYoon, Minyoung
Issue Date
Sep-2021
Publisher
ELSEVIER SCIENCE SA
Keywords
2D-crumpled porous carbon; Fe3O4; Fe3O4 NAs@2D-CCS; Garlic husk; Supercapacitor
Citation
Chemical Engineering Journal, v.420
Journal Title
Chemical Engineering Journal
Volume
420
URI
https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/81597
DOI
10.1016/j.cej.2020.127584
ISSN
1385-8947
Abstract
Due to the copious development of industries and depletion of fossil fuels generate deteriorating environmental pollution and appalling economic crisis. Thus, there are increasing unmet for developing well-defined nanostructures to mitigate energy and environmental issues. Herein, we firstly report a unique concerted method to convert agro bio-waste into an economical wealth material. By the inspiration of nature, we selected a waste 2D garlic husk (Allium sativum) as a torchbearer to make a unique material. The garlic extract was applied for the synthesis of Fe3O4 NAs@2D-CCS composite nano-assemblies (NAs). Interestingly, the small-sized Fe3O4 nanocrystals (<20 nm) underwent nucleation in the presence of biogenic 2D-CCS and formed a pomegranate like a cluster (200 nm) forming a conglomerate on porous carbon layers. Most importantly, no secondary waste was generated in this work. This Fe3O4 NAs@2D-CCS composite affords high specific capacitance of 820F g−1 at a current density of 0.5 A g−1, which is nearly 5 to 3 times higher than pristine Fe3O4 NPs (<20 nm) electrode with an outstanding power density (3500–8000 W kg−1) and specific energy density (115.5 to 65.9 Wh Kg−1), which is superior among most of all reported iron oxide and graphitic carbon composites. This simple work stimulates a new door for the generation of waste to well-defined nanostructure materials for energy, catalysis, and environmental applications. © 2020 Elsevier B.V.
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바이오나노대학 > 바이오나노학과 > 1. Journal Articles
산업·환경대학원 > 산업환경공학과 > 1. Journal Articles

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