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Cited 2 time in webofscience Cited 2 time in scopus
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Scalable Binder-Free Freestanding Electrodes Based on a Cellulose Acetate-Assisted Carbon Nanotube Fibrous Network for Practical Flexible Li-Ion Batteries

Authors
Han, Ji HyunShin, Kyu HangLee, Yun Jung
Issue Date
Feb-2021
Publisher
AMER CHEMICAL SOC
Keywords
lithium-ion battery; wearable; flexible electrode; freestanding electrode; high areal capacity
Citation
ACS APPLIED MATERIALS & INTERFACES, v.13, no.5, pp.6375 - 6384
Indexed
SCIE
SCOPUS
Journal Title
ACS APPLIED MATERIALS & INTERFACES
Volume
13
Number
5
Start Page
6375
End Page
6384
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1405
DOI
10.1021/acsami.0c22664
ISSN
1944-8244
Abstract
Herein, a freestanding cellulose acetate-carbon nanotube (CA-CNT) film electrode is presented to achieve highly flexible, high-energy lithium-ion batteries (LIBs). CA serves as a dispersing agent of CNTs and a binder-free network former. A straightforward washing can remove CA in the electrode almost completely, while the fibrous CNT network within the electrode is sustained. Furthermore, the facile fabrication enables the large-scale production of the film electrode because the CA-CNT film is processed by a conventional casting method and not by the area-limited vacuum filtration. The superior electrochemical performance and high flexibility of the full cell assembled with CA-CNT-based electrodes are maintained even at a high active material loading, which has been proven difficult to accomplish in the conventional configuration LIBs. Inaddition, by simply stacking six sheets of the freestanding film electrode, a capacity as high as 5.4 mA h cm(-2) is achieved. The assembled pouch battery operates stably under extreme deformation. We demonstrate that the rational design of the electrode could extend the flexibility to a higher energy than that achieved with the conventional configuration. We believe that the low production cost, high flexibility, and superior electrochemical performance of the proposed freestanding film electrode can expedite the implementation of wearable gears in daily life.
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