Article
Polymer Science
Chen Liu, Cheng-Wei Hung, I-Chung Cheng, Cheng-Che Hsu, I-Chun Cheng, Jian-Zhang Chen
Summary: In this study, reduced graphene oxide and polypyrrole mixed with chitosan were used to prepare supercapacitors, with their performance improved by plasma treatment. Electrochemical tests showed that the combined use of rGO and PPy can significantly increase capacitance and enhance stability.
Article
Chemistry, Analytical
Pei-Ling Lan, I-Chih Ni, Chih- Wu, Cheng-Che Hsu, I-Chun Cheng, Jian-Zhang Chen
Summary: By processing reduced graphene oxide and LiCl-Mn(NO3)(2)·4H(2)O mixture through calcination, rGO-LiMnOx nanocomposites are obtained and used in the fabrication of hybrid supercapacitors (HSCs). Among the HSCs using different gel electrolytes, the one with Li2SO4 gel electrolyte exhibits the highest areal capacitance and energy density, while the one with H2SO4 gel electrolyte shows better cycling stability. These findings shed light on the interplay between gel electrolytes and electrode materials, providing insights into the design and optimization of high-performance HSCs.
Article
Chemistry, Physical
Jheng-Yun Lai, Cheng-Che Hsu, Jian-Zhang Chen
Summary: In this study, rGO-Mn(NO3)2·4H2O was converted into rGO-MnOx using nitrogen atmospheric-pressure plasma jet (APPJ) and/or tube furnace. The SCs processed by APPJ showed better performance compared to furnace-processed ones. Additionally, the rGO-MnOx SC outperformed the previously reported rGO-SnOx SC.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Dragos-Viorel Cosma, Cristian Tudoran, Maria Coros, Crina Socaci, Alexandra Urda, Alexandru Turza, Marcela-Corina Rosu, Lucian Barbu-Tudoran, Ioana Stanculescu
Summary: Surface modification of cotton and leather substrates with cold atmospheric pressure plasma (CAPP) and TiO2-SiO2-reduced graphene oxide composites in dispersion form improved their morpho-structural properties and photocatalytic activity. The study evaluated the effect of CAPP pre-treatment, organic dispersion coating, and TS/GR composites on the surfaces of cotton and leather. The success of the coating formulations was confirmed through SEM analysis and UV-Vis spectroscopy, and the self-cleaning ability of the modified samples was demonstrated through photocatalytic discoloration of berry juice stains under UV light.
Article
Materials Science, Ceramics
Jung-Hsien Chang, Ming-Feng Lin, Yu-Lin Kuo, Chii-Rong Yang, Jian-Zhang Chen
Summary: In this study, rGO-SnO2 nanocomposites were fabricated using a nitrogen atmospheric-pressure plasma jet (APPJ) for supercapacitor electrodes. The optimal processing time of 300 s resulted in the best areal capacitance of 97.53 mF/cm(2) with a capacitance retention rate of approximately 85% after a 10,000-cycle test. Additionally, the capacitance increased by 11% after a 1000-cycle bending test, indicating improved performance with mechanical bending.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Jacob Strimaitis, Samuel Adjepong Danquah, Clifford F. Denize, Sangram K. Pradhan, Messaoud Bahoura
Summary: Researchers incorporated synthesized GO and rGO in AC electrodes and found that they moderately enhance the rate resistance and capacity. However, the overall ineffectiveness of GO and rGO is attributed to their isolation and infrequent distribution method.
Article
Chemistry, Physical
Jemini Jose, J. Vigneshwaran, Anjana Baby, Raja Viswanathan, Sujin P. Jose, P. B. Sreeja
Summary: A three dimensional hybrid nanoarchitecture consisting of two-dimensional reduced graphene oxide, one-dimensional multiwalled carbon nanotube, and zero-dimensional zirconium oxide nanoparticles was synthesized for high performance supercapacitors. The synergistic effect of different dimensional materials in the composite structure led to excellent capacitance and cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Weiwen Chen, Chunfeng Hao, Zenghui Qiu, Xin Zhang, Haijun Xu, Bingzhe Yu, Shaowei Chen
Summary: In this study, a 3D layered Ti3C2TX@NiO-RGO heterostructured hydrogel with ultrahigh specific capacitance was successfully synthesized. It was found that a defective RGO hydrogel exhibited a higher specific capacitance. The combination of these two materials as electrode in an ASC showed a large operating voltage, high energy density, and remarkable cycling stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Sang Hwa Lee, Jungjun Lee, Jaemin Jung, A. Ra Cho, Jae Ryeol Jeong, Cu Dang Van, Junghyo Nah, Min Hyung Lee
Summary: The evolution of smart life requires microscale energy storage devices with high power and energy density to integrate IoT devices with sustainable power generators. Pseudocapacitors are considered efficient energy storage devices due to their longer cyclability and high-power density compared to Li-ion batteries, but there are difficulties in patterning microscale electrodes using conventional methods. A one-step fabrication method of micro-supercapacitors was developed through the in situ formation of Co metals and reduced graphene oxides in a one-pot laser scribing process, resulting in a Co/rGO MSC with four times higher capacitance than rGO MSC.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Ceramics
Dharshini Mohanadas, Nur Hawa Nabilah Azman, Jaafar Abdullah, Nor Azam Endot, Yusran Sulaiman
Summary: A novel bifunctional ternary oxide/reduced graphene oxide composite was developed for asymmetric electrochromic supercapacitor application, showing excellent distribution and high specific capacitance, as well as outstanding electrochromic and supercapacitive performance.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Bo-wen Deng, Yi Yang, Yu-xin Liu, Bo Yin, Ming-bo Yang
Summary: This work presents a hierarchical structure design of mixed holey graphene oxide (HGO) and Ni (OH)(2) active material layer for creating an asymmetric solid supercapacitor (ASC) device with flexible and high electrochemical performance. The effects of hydrothermal treatment and ice-template freezing parameters on electrochemical stability under repeated deformation are discussed, and the optimal parameters result in a high areal capacitance of 479.8 mF/cm(2). The use of porous HGO and oriented GO aerogel synergistically contribute to high energy and power density, as well as excellent electrochemical performance retention under repeated deformation. The electrode assembly provides guidance for future supercapacitor design.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Wei Yan, Ying Zhang, Ting Zeng, Yuanyuan Zhang, Qijin Wan, Nianjun Yang
Summary: In this study, a hybrid material of nickel-manganese LDH/holey reduced graphene oxide (NiMn-LDH/hrGO) was synthesized using a one-step solvothermal technique. The addition of hrGO improved the conductivity and surface area of the NiMn-LDH/hrGO electrode. The material exhibited high specific capacity and excellent capacity retention in supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Hamid Reza Naderi, Pooya Nadri, Amir Mohammad Sorouri, Mohammad Reza Ganjali, Hermann Ehrlich, Mehdi Rahimi-Nasrabadi, Farhad Ahmadi
Summary: For the first time, Eu-2(WO4)(3) nanoparticles (EWNPs) were successfully fabricated and anchored on reduced graphene oxide (RGO) to form EWNP/RGO nano-composites. The resulting nanostructured material exhibited high specific capacitance and good supercapacitive behavior, with relatively high capacitance retention after cycling tests.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Taegun Kim, Edmund P. Samuel, Chanwoo Park, Yong-Il Kim, Ali Aldalbahi, Faisal Alotaibi, Sam S. Yoon
Summary: In this study, wearable supercapacitor textiles were produced by depositing rGO and SnO2 on fabric using supersonic spraying, investigating the synergistic effect of the two materials on electrochemical performance. The combination of rGO and SnO2 enhanced charge transport within the composite electrode, while the porous structure of the fabric allowed for sufficient electrolyte diffusion. The optimized sample exhibited high specific capacitance and capacitance retention, confirming the mechanical durability of the wearable supercapacitor.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Arijit Kapuria, Tapas Kumar Mondal, Bikash Kumar Shaw, Yan-Kuin Su, Shyamal K. Saha
Summary: Functionalized carbon based 2D materials show promise as low cost and environmentally friendly electrocatalysts for hydrogen evolution reaction (HER) and supercapacitor applications. Metal free polysulfide functionalized reduced graphene oxide (GPS) is successfully synthesized as an efficient HER electrocatalyst and energy storage device. The material exhibits high current density and specific capacitance due to the synergistic effect of the graphene network and polysulfide functionalizations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Physics, Applied
Mohana Sruthi Mallela, Jui-Hsuan Tsai, Jian-Zhi Huang, Cheng-Che Hsu, Mei-Hsin Chen, Chih- Wu, Jian-Zhang Chen, I-Chun Cheng
Summary: This study demonstrates the use of atmospheric pressure plasma treatment to enhance the interface properties between the active perovskite layer and electron transport layer in flexible perovskite solar cells. By applying a scan-mode low-temperature helium dielectric barrier discharge (DBD) jet to process the TiO2 nanoparticle layers, the photoelectrical conversion efficiency of the cells is improved from 12.30% to 13.66%. This improvement is attributed to the increase of hydrophilic functional groups and the reduction of charge transfer resistance on the surface of the TiO2 nanoparticle layer.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Chen Liu, Chia-Yun Tseng, Ying-Chyi Wang, I-Chun Cheng, Jian-Zhang Chen
Summary: The experimental results show that Ru/NF catalyst treated with 95%Ar-5%O-2 plasma exhibits significantly improved electrocatalytic activity for the hydrogen evolution reaction, with superior performance compared to other gas treatments.
Article
Energy & Fuels
Chung-Yueh Shih, I-Chih Ni, Chih-Lin Chan, Cheng-Che Hsu, Chih- Wu, I-Chun Cheng, Jian-Zhang Chen
Summary: In this study, a helium DBD jet was used for the first time to treat graphite foil as the current collector of a paper-based fluidic aluminum-air battery. The plasma functionalized the graphite foil surface to improve wettability and enhance battery performance. The treatment significantly improved current density, power density, and energy density.
Article
Materials Science, Ceramics
Jheng-Yun Lai, Hong-Kai Chen, Cheng-Che Hsu, Jian-Zhang Chen
Summary: LiCl-Mn(NO3)(2)center dot 4H(2)O pastes were screen-printed on a carbon cloth substrate and converted into LiMn2O4 by furnace-calcination. The LiMn2O4 electrode was then post-processed using a nitrogen atmospheric-pressure plasma jet (APPJ) to create oxygen vacancy defects. The Li-ion hybrid supercapacitors (Li-HSCs) were tested in 1-M Li2SO4 aqueous solution by cyclic voltammetry (CV) and galvanostatic charging/discharging (GCD). The results show that proper APPJ treatment optimizes the performance of Li-HSCs, while excessive treatment may cause material damage. After a 3-minute APPJ treatment at 620 degrees C, the Li-HSCs exhibited a maximum areal capacitance of 87.96 mF/cm(2) with capacitance retention of 124.8% after a 1000-cycle CV test.
CERAMICS INTERNATIONAL
(2023)
Article
Electrochemistry
Wei-Hang Cho, I-Chun Cheng, Jian-Zhang Chen
Summary: Through electrochemical experiments, it was found that rGO-PANI supercapacitors exhibit large pseudocapacitance effect in lithium salt electrolytes, while showing large electrical double-layer capacitance effect in sulfuric acid electrolyte. The rGO-PANI supercapacitor with H2SO4 electrolyte has the largest areal capacitance of 48.83 mF/cm(2), whereas those with LiCl and Li2SO4 electrolytes have areal capacitances of 31.69 mF/cm(2) and 22.35 mF/cm(2) respectively. After a 10,000-cycle CV stability test, the rGO-PANI supercapacitor with Li2SO4 electrolyte shows some ion embedding, resulting in better cycling stability than those with LiCl and H2SO4 electrolytes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Ting-Wei Tsai, I-Chih Ni, Chih- Wu, I-Chun Cheng, Jian-Zhang Chen
Summary: In this study, temperature sensors were fabricated using a mixture of carbon nanotube (CNT) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The aging of CNT/PEDOT:PSS solution significantly increased the temperature sensitivity and Seebeck coefficient. This serves as a facile method to improve the temperature sensitivity of the CNT/PEDOT:PSS composite.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Editorial Material
Physics, Fluids & Plasmas
Jian-Zhang Chen, Meng-Jiy Wang, Kun-Mo Lin, Yun-Chien Cheng, Kungen Teii, Hiroaki Ito
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Physics, Applied
Xuan-Lun Zhang, Cheng-Che Hsu
Summary: This study proposes the use of transfer-learning-based algorithms as data reduction strategies for the classification of VOCs using plasma optical emission spectroscopy. A home-made microplasma generation device (MGD) is used to generate plasma in Ar and VOCs mixtures. Spectra are acquired from ten MGDs, and the VOCs tested are methanol, ethanol, and isopropanol. Classification is done using a convolutional neural network, and explainable artificial intelligence technique is used. VOC concentrations are quantified using linear regression and an ANN. Three transfer learning-based algorithms are tested, and spectral data is grouped into source and target datasets. The results demonstrate the potential of transfer-learning-based algorithms for data reduction and classification of spectroscopic data.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Multidisciplinary
Chih-Lin Chan, I-Chih Ni, Chih- Wu, I-Chun Cheng, Jian-Zhang Chen
Summary: This study investigates the effect of low-pressure plasma (LPP) processing on the surface properties of a graphite foil as the cathode of a paper-based fluidic Al-air battery. The plasma treated battery showed better discharge performance in terms of current density, power density, and energy density compared to an untreated battery.
Article
Materials Science, Multidisciplinary
Hong-Kai Chen, I-Chih Ni, Chih- Wu, I-Chun Cheng, Jian-Zhang Chen
Summary: LiCl + Mn(NO3)(2)center dot 4H(2)O pastes are screen-printed on a carbon cloth substrate and converted into LiMn2O4 by calcining at 400 degrees C for 6 h. Then, the LiMn2O4/carbon cloth is treated with Ar, Ar+5%H-2, or Ar+5%O-2 low-pressure plasma. The treated LiMn2O4/carbon cloth is used as the electrode for Li-ion hybrid supercapacitors (Li-HSCs) and shows improved performance, especially with Ar+5%O-2 plasma treatment.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Jia-Shiuan Tsai, Jian-Zhang Chen
Summary: This study investigated the impact of oxygen impurity on the inlet gas in a nitrogen atmospheric pressure plasma jet (APPJ). A numerical model was developed to simulate the nitrogen APPJ considering fluid dynamics, heat transfer, mass transfer, diffusion, and chemical reactions. Experimental tests were conducted to verify the plasma temperature characteristics on the treated surface. The findings revealed that the plasma temperature decreased with increasing oxygen impurity, affecting the excited and neutral species composition.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Pei-Ling Lan, I-Chih Ni, Chih- Wu, Cheng-Che Hsu, I-Chun Cheng, Jian-Zhang Chen
Summary: By processing reduced graphene oxide and LiCl-Mn(NO3)(2)·4H(2)O mixture through calcination, rGO-LiMnOx nanocomposites are obtained and used in the fabrication of hybrid supercapacitors (HSCs). Among the HSCs using different gel electrolytes, the one with Li2SO4 gel electrolyte exhibits the highest areal capacitance and energy density, while the one with H2SO4 gel electrolyte shows better cycling stability. These findings shed light on the interplay between gel electrolytes and electrode materials, providing insights into the design and optimization of high-performance HSCs.
