NDLI: Freestanding hierarchical porous carbon film derived from hybrid nanocellulose for high-power supercapacitors

Content Provider	Springer Nature Link
Author	Li, Zhi Ahadi, Kaveh Jiang, Keren Ahvazi, Behzad Li, Peng Anyia, Anthony O. Cadien, Ken Thundat, Thomas
Copyright Year	2017
Abstract	Nanocellulose is a sustainable and eco-friendly nanomaterial derived from renewable biomass. In this study, we utilized the structural advantages of two types of nanocellulose and fabricated freestanding carbonized hybrid nanocellulose films as electrode materials for supercapacitors. The long cellulose nanofibrils (CNFs) formed a macroporous framework, and the short cellulose nanocrystals were assembled around the CNF framework and generated micro/mesopores. This two-level hierarchical porous structure was successfully preserved during carbonization because of a thin atomic layer deposited (ALD) Al$_{2}$O$_{3}$ conformal coating, which effectively prevented the aggregation of nanocellulose. These carbonized, partially graphitized nanocellulose fibers were interconnected, forming an integrated and highly conductive network with a large specific surface area of 1,244 m$^{2}$·g$^{–1}$. The two-level hierarchical porous structure facilitated fast ion transport in the film. When tested as an electrode material with a high mass loading of 4 mg·cm$^{–2}$ for supercapacitors, the hierarchical porous carbon film derived from hybrid nanocellulose exhibited a specific capacitance of 170 F·g$^{–1}$ and extraordinary performance at high current densities. Even at a very high current of 50 A·g$^{–1}$, it retained 65% of its original specific capacitance, which makes it a promising electrode material for high-power applications.
Starting Page	1847
Ending Page	1860
Page Count	14
File Format	PDF
ISSN	19980124
Journal	Nano Research
Volume Number	10
Issue Number	5
e-ISSN	19980000
Language	English
Publisher	Tsinghua University Press
Publisher Date	2017-03-24
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	supercapacitors hierarchical structure atomic layer deposition (ALD) integrated structure Nanotechnology Materials Science Atomic/Molecular Structure and Spectra Condensed Matter Physics Biotechnology Biomedicine
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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