Article
Engineering, Electrical & Electronic
Feihui Li, Lei Zhang, Jinghan Gao, Wei Wang, Jianping Gao, Yunlan Gong, Cheng Pan
Summary: In this study, PPy/RGO composites were prepared using in situ polymerization and characterized. The thermoelectric properties of the composites and their relationship with composition and acids were investigated. The results showed that the thermoelectric properties of PPy/RGO composites prepared by in situ polymerization were superior to those of PPy/RGO blends. Additionally, the thermoelectric properties increased as the RGO content increased. PPy/RGO composites doped with organic acids exhibited better thermoelectric properties compared to those doped with inorganic acids.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Aya Hamed, Amr Hessein, Ahmed Abd El-Moneim
Summary: A novel fabrication approach using a CO2 Laser system to achieve real-time doping, reduction, and patterning of graphene oxide-based films has been proposed in this study. Different types of planar supercapacitors were readily fabricated with high nitrogen and sulfur content in the graphene framework, leading to excellent electrochemical performance. The versatility of the proposed approach was demonstrated by achieving higher energy density, power density, and retention rate in flexible graphene-based electrochemical storage devices.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Paper & Wood
Chunliu Liang, Limin Zang, Fangfang Shi, Chao Yang, Jianhui Qiu, Qifan Liu, Zhenming Chen
Summary: By fixing graphene oxide and polypyrrole/silver nanoparticles on cotton fabric, researchers have developed flexible electrodes for fabric-based supercapacitors. These electrodes, combining three active materials, exhibit good electrochemical performance, which is significant for flexible fabric-based supercapacitors.
Article
Electrochemistry
Wenyu Liang, Igor Zhitomirsky
Summary: This study proposes an asymmetric supercapacitor device operating in a neutral electrolyte with a voltage window of 1.7 V. MXene-PPy composites are used as the negative electrode, and high capacitance is achieved through optimization of composition and performance. A new strategy for in-situ PPy polymerization on the MXene surface is employed, enhancing the negative electrode performance.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
R. Ghanbari, M. Entezar Shabestari, E. Naderi Kalali, Y. Hu, S. R. Ghorbani
Summary: The study successfully prepared a reduced-graphene oxide/polypyrrole nanofiber nanocomposite as the electrode material for supercapacitors, exhibiting high specific capacitance and energy density, good cycling stability, and ideal capacitive behavior at low frequencies.
Article
Energy & Fuels
Qihang Zhou, Haoyi Yao
Summary: Carbon-based materials have gained attention as active electrode materials for supercapacitors due to their unique advantages, offering efficient energy storage capabilities, especially with excellent cycle performance at high rates. Research indicates that defects and doping within carbon materials significantly impact the performance of supercapacitors.
Article
Chemistry, Physical
Jie Yang, Jianyun Cao, Yudong Peng, Mark Bissett, Ian A. Kinloch, Robert A. W. Dryfe
Summary: By utilizing PPy/EGO composite material, the Zn-PPy/EGO system demonstrates high energy and power densities, outperforming Zn-ion hybrid supercapacitors using carbon cathodes.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Yihan Qiu, Yuting Ren, Xiaoyu Jia, Hongwei Li, Mei Zhang
Summary: In this paper, flexible supercapacitors assembled by graphene fibers are fabricated, providing high energy densities and good practical energy supply applications. The wearable fiber-shaped supercapacitors exhibit a high specific capacitance and an outstanding energy density, and can power miniaturized traffic lights for 20 min. This research finding reveals a new approach for the preparation of flexible electrodes and may facilitate the exploitation of wearable energy storage equipment.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Monika M. Jadhav, Kshama D. Lokhande, Mahesh P. Bondarde, Madhuri A. Bhakare, Surajit Some
Summary: This study developed a novel PPy@rGO/CaCO3 (PRC) composite using a facile one-pot fabrication method. The PRC composite was coated onto the surface of silica and melamine sponge to effectively remove organic pollutants. The as-prepared PRC materials exhibited high dye adsorption capacity and demonstrated remarkable selectivity for cationic dyes. They also sustained multiple cycles without losing their adsorption efficiencies.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Review
Polymer Science
Oluwaseye Samson Adedoja, Emmanuel Rotimi Sadiku, Yskandar Hamam
Summary: The combination of graphene and conducting polymers has the potential to revolutionize energy storage by providing a more reliable, sustainable, and affordable energy source. Introducing graphene nanoparticles into conductive polymer nanoparticles is a promising technique to improve charge transfer efficiency. The fabrication method of graphene-polymer nanoelectrodes plays a critical role in their excellent performance, and various synthesis techniques for graphene, polypyrrole, and polythiophene are summarized in this review. The PPy/PTh/Gr nanocomposite is considered a promising nanoelectrode for sustainable and efficient energy storage, and future research should focus on improving materials synthesis techniques for multiple applications.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Fen Zhu, Xiao She, Zhanhui Zhang, Xianghua Yu, Jiayou Ji, Liang Li, Shaoping Li
Summary: In this study, flexible free-standing films with remarkable flexibility and excellent electrochemical properties were successfully prepared. These films can be used for fabricating portable and wearable supercapacitors and exhibit stable electrochemical performance even after multiple bending cycles, making them suitable for manufacturing wearable devices, portable electronics, and healthcare monitoring applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Chemistry, Analytical
Patrycja Wilczewska, Joanna Breczko, Diana M. Bobrowska, Monika Wysocka-Zolopa, Jakub Goclon, Anna Basa, Krzysztof Winkler
Summary: The influence of graphene quantum dots (GQDs) on the physicochemical properties of polypyrrole nanoparticles (PpyNPs) was investigated experimentally and theoretically. The synthesis of the non-covalent PpyNPs/ GQDs material was based on the known procedure of chemical pyrrole polymerization. The obtained hybrids were in the form of spherical polymeric particles coated with GQDs, and the morphology and porosity of the materials were influenced by the polymerization conditions. The electrode processes on the electrode modified with the PpyNPs/GQDs composite were found to be significantly different from those involving pristine PpyNPs, with faster charge transfer processes and improved electrochemical behavior observed for the composite material.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Physics, Applied
Jin Yong An, Han Sung Lee, Jihye Kim, Sang-Wan Ryu, Byong Chon Park, Yung Ho Kahng
Summary: In this study, the effects of doping graphene with the n-type dopant polyethylenimine were investigated, leading to improved performance of graphene-based devices. The doping induced a maximum decrease of 63% in the sheet resistance of reduced graphene oxide (RGO) films, and also improved the specific capacitance of RGO-based supercapacitor electrodes by approximately 3%-11%, with a maximum value of 205 +/- 22F/g (or 260 +/- 50 F/cm(2)). These results can aid future research on combining polymers and graphene-based materials for various applications.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Composites
Xin Li, Peng Liu
Summary: Poly(1,5-diaminoanthraquinone) (PDAA) was covalently grafted onto graphene oxide (GO) to develop flexible symmetric solid-state supercapacitors. The resulting PDAA-rGO/rEGO-based supercapacitors showed excellent electrochemical performance and cycling stability.
COMPOSITES COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Xiaohong Sun, Nan Yang, Heng Dong, Han Yu, Hongbing Yu, Linya Feng
Summary: An in-situ electrochemical synthesis technology was developed to assemble N/B/F-codoped RGO on Ti foam effectively, using ionic liquid as the heteroatoms parents. This technology has multiple advantages including anti-RGO agglomeration, suppressing hydrolysis side reaction, and reducing internal resistance. The study provides a highly effective, green and low-cost nonradical-based AOP technology for controlling antibiotics pollution in the environmental water matrices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)