Carbon Nanotube Sheets/Elastomer Bilayer Harvesting Electrode with Biaxially Generated Electrical Energy
"> Figure 1
<p><b>Fabrication process and stretchability of CBHE:</b> (<b>a</b>) illustration of the process for fabricating CBHE: (<b>a</b>)-(i) elastomer, (<b>a</b>)-(ii) omnidirectionally pre-stretched elastomer at 80 %, (<b>a</b>)-(iii) perpendicularly stacked CNT sheets on the pre-stretched elastomer, and (<b>a</b>)-(iv) released CNT sheets stacked on elastomer at 0% (The red arrow indicates the next step of progress). (<b>b</b>) Optical image of CBHE (scale bar: 1 cm). Optical images of CBHE before and after (<b>c</b>) twisting and (<b>d</b>) bending. Optical images of CBHE before and after stretching along (<b>e</b>) x-axis and (<b>f</b>) y-axis at 80%.</p> "> Figure 2
<p>The mechanical and electrical properties of the CBHE: (<b>a</b>) the strain–stress graph for the CBHE when stretching along the x-axis (black) and y-axis (red); (<b>b</b>) strain versus resistance retention when stretching the CBHE along the x-axis (black solid circle) and y-axis (red open circle).</p> "> Figure 3
<p>Surface structure analysis: (<b>a</b>–<b>c</b>) SEM images for CBHE: (<b>a</b>) surface SEM images (scale bar: 50 µm) and cross-sectional SEM images along (<b>b</b>) x-axis and (<b>c</b>) y-axis (scale bar: 40 µm). SEM images for CBHE stretching along (<b>d</b>) x-axis, (<b>e</b>) y-axis, and (<b>f</b>) both axes (scale bar: 50 µm).</p> "> Figure 4
<p>The electrical energy generation mechanism for the CBHE: (<b>a</b>) the configuration of the CBHE-based three-electrode system (reference electrode: Ag/AgCl; counter electrode: Pt mesh/CNT bucky paper); (<b>b</b>) a conceptual illustration showing the changes in EDL capacitance when stretching and releasing the CBHE; (<b>c</b>) the b-value is a function of voltage (inset showing the linear sweep voltammetry for calculating b-value); (<b>d</b>) PECS analysis using cyclic voltammetry with (black) and without (red) stretching the CBHE.</p> "> Figure 5
<p>Evaluating harvesting performance within 0.1 M HCl: (<b>a</b>) schematic illustrations of harvesting condition: (<b>a</b>)-(i) stretching CBHE along the x-axis, (<b>a</b>)-(ii) stretching CBHE along the y-axis; (<b>b</b>) CV curves before and after stretching CBHE along the x-axis; (<b>c</b>) real-time OCV and SCC graphs when sinusoidally stretching CBHE to 80% at 1 Hz along the x-axis; (<b>d</b>) CV curves before and after stretching CBHE along the y-axis; (<b>e</b>) real-time OCV and SCC graphs when sinusoidally stretching CBHE to 80% at 1 Hz along the y-axis; (<b>f</b>) gravimetric peak power and peak voltage of CBHE with load resistance; (<b>g</b>) gravimetric peak power of CBHE-based chemo-mechanical energy harvesters during 1000 cycles, when stretched to 80% at 1 Hz (inset showing the generated voltage on 10 cycles). SEM images of CBHE (<b>h</b>) before and (<b>i</b>) after the harvesting cycle test.</p> ">
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials for CNT Sheets/Elastomer Bilayer
2.2. Material Characterization
2.3. Characterization of Harvesting Performance for CBHE
3. Results and Discussion
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Conflicts of Interest
References
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Oh, S.; Kim, H.J.; Lee, S.; Kim, K.J.; Kim, S.H. Carbon Nanotube Sheets/Elastomer Bilayer Harvesting Electrode with Biaxially Generated Electrical Energy. Polymers 2024, 16, 2477. https://doi.org/10.3390/polym16172477
Oh S, Kim HJ, Lee S, Kim KJ, Kim SH. Carbon Nanotube Sheets/Elastomer Bilayer Harvesting Electrode with Biaxially Generated Electrical Energy. Polymers. 2024; 16(17):2477. https://doi.org/10.3390/polym16172477
Chicago/Turabian StyleOh, Seongjae, Hyeon Ji Kim, Seon Lee, Keon Jung Kim, and Shi Hyeong Kim. 2024. "Carbon Nanotube Sheets/Elastomer Bilayer Harvesting Electrode with Biaxially Generated Electrical Energy" Polymers 16, no. 17: 2477. https://doi.org/10.3390/polym16172477