Surface Modification Effect and Electrochemical Performance of LiOH-High Surface Activated Carbon as a Cathode Material in EDLC
Abstract
:1. Introduction
2. Results
2.1. Crystallography and Morphology Analysis
2.2. The Functional Group and Surface Area Analysis
2.3. Electrochemical Test
3. Materials and Methods
3.1. Chemical Reagents
3.2. Preparation of Hydrophilic Carbon
3.3. Characterization
3.4. Boehm Titration
3.5. Cyclic Voltammetry (CV) Test
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Sample Availability
References
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Surface Functional Group (mg/g) | Surface Functional Group (mmol/g) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Carboxylic | Lactonic | Phenolic | Total acidic | Carboxylic | Lactonic | Phenolic | Total Acidic | ||
1 | LiOH-treated YP80F | 27.58 | 8.33 | 11.44 | 47.35 | 0.123 | 0.033 | 0.121 | 0.278 |
2 | LiOH-treated Graphite | 28.48 | 7.82 | 11.48 | 47.78 | 0.127 | 0.030 | 0.122 | 0.279 |
3 | LiOH-treated YP50F | 28.21 | 8.13 | 11.86 | 48.20 | 0.126 | 0.032 | 0.123 | 0.281 |
BET Analysis | ||||||
Samples | Surface Area (m2/g) | Total Pore Volume (cm3/g) | Mean Pore Diameter (nm) | |||
Graphite | 6.29 | 0.042 | 26.6 | |||
YP50F | 1676.1 | 0.776 | 1.9 | |||
YP80F | 2374.8 | 1.227 | 2.1 | |||
Graphite-LiOH | 15.2 | 0.094 | 24.6 | |||
YP50F-LiOH | 11.7 | 0.074 | 25.3 | |||
YP80F-LiOH | 2155.7 | 1.104 | 2.0 | |||
BJH Analysis | ||||||
Samples | Mesopore Pore Diameter (nm) | Micropore Surface Area (m2/g) | Mesopore Surface Area (m2/g) | Micropore Volume (cm3/g) | Mesopore Volume (cm3/g) | Micropore Vol. Percent (%) |
Graphite | 140.0 | −0.38 | 6.7 | 0.002 | 0.040 | 4 |
YP50F | 1.7 | 1471.35 | 204.8 | 0.586 | 0.191 | 75 |
YP80F | 1.7 | 1345.30 | 1029.5 | 0.571 | 0.656 | 47 |
Graphite-LiOH | 76.49 | 0.11 | 15.11 | 0.004 | 0.090 | 4 |
YP50F-LiOH | 76.5 | −3.28 | 15.0 | 0.003 | 0.072 | 3 |
YP80F-LiOH | 1.7 | 1238.64 | 917.1 | 0.526 | 0.578 | 48 |
T-Plot | ||||||
Samples | Total Surface Area (m2/g) | Micropore Surface Area (m2/g) | External Surface (m2/g) | Micropore Volume (cm3/g) | Mesopore Volume (cm3/g) | Micropore Vol. Percent (%) |
Graphite | 7.40 | 2.44 | 23.96 | −0.021 | - | |
YP50F | 1898.4 | 1639.4 | 36.7 | 0.693 | 0.084 | 89 |
YP80F | 2226.9 | 2304.4 | 70.4 | 1.084 | 0.100 | 88 |
Graphite-LiOH | 1.665 | 2.30 | 21.283 | 0.023 | - | |
YP50F-LiOH | 43.5 | 11.59 | 11.61 | 0.037 | 0.111 | 50 |
YP80F-LiOH | 1063.2 | 1094.1 | 46.0 | 0.511 | 0.143 | 84 |
№ | Sample | Current Collector | Area of Integration | Specific Capacitance (Cp) (F/g) | Energy Density (Wh/kg) | Power Density (kW/kg) |
---|---|---|---|---|---|---|
1 | Li-YP80F | Cu foil | 9.828 × 10−4 | 1.196 × 10−4 | 14.95 | 66.44 |
Ni foil | 3.918 × 10−4 | 2.118 × 10−5 | 2.65 | 13.81 | ||
2 | Li-YP50F | Cu foil | 7.601 × 10−4 | 1.169 × 10−4 | 14.61 | 59.77 |
Ni foil | 2.21 × 10−4 | 1.21 × 10−5 | 1.51 | 7.26 | ||
3 | Li-Graphite | Cu foil | 6.559 × 10−4 | 1.17 × 10−4 | 14.62 | 57.83 |
Ni foil | 2.158 × 10−4 | 1.192 × 10−5 | 1.49 | 6.79 |
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Otgonbayar, Z.; Yang, S.; Kim, I.-J.; Oh, W.-C. Surface Modification Effect and Electrochemical Performance of LiOH-High Surface Activated Carbon as a Cathode Material in EDLC. Molecules 2021, 26, 2187. https://doi.org/10.3390/molecules26082187
Otgonbayar Z, Yang S, Kim I-J, Oh W-C. Surface Modification Effect and Electrochemical Performance of LiOH-High Surface Activated Carbon as a Cathode Material in EDLC. Molecules. 2021; 26(8):2187. https://doi.org/10.3390/molecules26082187
Chicago/Turabian StyleOtgonbayar, Zambaga, Sunhye Yang, Ick-Jun Kim, and Won-Chun Oh. 2021. "Surface Modification Effect and Electrochemical Performance of LiOH-High Surface Activated Carbon as a Cathode Material in EDLC" Molecules 26, no. 8: 2187. https://doi.org/10.3390/molecules26082187