Tailoring of Aqueous-Based Carbon Nanotube-Nanocellulose Films as Self-Standing Flexible Anodes for Lithium-Ion Storage
- Authors
- Hoang Kha Nguyen; Bae, Jaehan; Hur, Jaehyun; Park, Sang Joon; Park, Min Sang; Kim, Il Tae
- Issue Date
- Apr-2019
- Publisher
- MDPI
- Keywords
- lithium-ion batteries; carbon nanotubes; nanocellulose; self-standing composite anode; carbonization
- Citation
- NANOMATERIALS, v.9, no.4
- Journal Title
- NANOMATERIALS
- Volume
- 9
- Number
- 4
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/1666
- DOI
- 10.3390/nano9040655
- ISSN
- 2079-4991
- Abstract
- An easy and environmentally friendly method was developed for the preparation of a stabilized carbon nanotube-crystalline nanocellulose (CNT-CNC) dispersion and for its deposition to generate self-standing CNT-CNC composite films. The composite films were carbonized at different temperatures of 70 degrees C, 800 degrees C, and 1300 degrees C. Structural and morphological characteristics of the CNT-CNC films were investigated by X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM), which revealed that the sample annealed at 800 degrees C (CNT-CNC800) formed nano-tree networks of CNTs with a high surface area (1180 m(2)g(-1)) and generated a conductive CNC matrix due to the effective carbonization. The carbonized composite films were applied as anodes for lithium-ion batteries, and the battery performance was evaluated in terms of initial voltage profile, cyclic voltammetry, capacity, cycling stability, and current rate efficiency. Among them, the CNT-CNC800 anode exhibited impressive electrochemical performance by showing a reversible capacity of 443 mAhg(-1) at a current density of 232 mAg(-1) after 120 cycles with the capacity retention of 89% and high rate capability.
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