Article
Energy & Fuels
Mervat Ibrahim, Hani Nasser Abdelhamid, Aya Mohamed Abuelftooh, Saad G. Mohamed, Zhen Wen, Xuhui Sun
Summary: This study presents a method for the synthesis of a triazine covalent organic framework/graphene oxide nanocomposite, which is used to synthesize N-doped carbon/reduced graphene oxide. The in-situ synthesized N-doped carbon/reduced graphene oxide shows superior electrochemical performance and is employed as electrode materials for supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Jianhao Lao, Yao Lu, Songwen Fang, Fen Xu, Lixian Sun, Yu Wang, Tianhao Zhou, Lumin Liao, Yanxun Guan, Xueying Wei, Chenchen Zhang, Yukai Yang, Yongpeng Xia, Yumei Luo, Yongjin Zou, Hailiang Chu, Huanzhi Zhang, Yong Luo, Yanling Zhu
Summary: Supercapacitors, as a new type of electrical energy storage device, can provide a potential solution to environmental problems caused by economic development and excessive use of fossil energy resources. In this study, nitrogen/oxygen-doped porous carbon materials were fabricated through the calcination and activation of an organic crosslinked polymer, resulting in a high-performance electrode material with excellent electrochemical performance and energy storage potential.
Article
Engineering, Environmental
Jiale Liu, Weikang Guo, Hui Tao, Yusuke Asakura, Qin Shuai, Jeonghun Kim, Lijin Huang, Yusuke Yamauchi
Summary: In this study, hierarchical magnetic porous carbon materials (M-NPC) doped with iron and nitrogen were prepared using a direct carbonization method. The M-NPC exhibited a hierarchical structure, high porosity, and abundant N-containing binding sites, enabling efficient removal of sulfamerazine (SMR) within 2 min. Electrostatic interactions, 7C-7C stacking, and hydrogen bond interactions were identified as the dominant mechanisms contributing to excellent adsorption performance. The M-NPC demonstrated easy operation and good regeneration ability, making it highly promising for the efficient removal of sulfonamides from wastewater.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Shigeyuki Umezawa, Takashi Douura, Koji Yoshikawa, Yohei Takashima, Mika Yoneda, Kazuma Gotoh, Vlad Stolojan, S. Ravi P. Silva, Yasuhiko Hayashi, Daisuke Tanaka
Summary: A novel method for preparing boron-doped porous carbon was developed by direct carbonization of COF-5. The boron-doped carbon showed superior performance in energy storage, with higher specific capacitance and better cycling stability compared to conventional activated carbon.
Article
Chemistry, Physical
Mervat Ibrahim, Moataz G. Fayed, Saad G. Mohamed, Zhen Wen, Xuhui Sun, Hani Nasser Abdelhamid
Summary: This study introduces a method for synthesizing covalent organic frameworks/graphitic carbon nitride nanocomposites and preparing nitrogen-doped carbon and nitrogen-doped carbon/g-C3N4 materials through carbonization reaction. These materials can be used for supercapacitors and lithium-ion batteries, exhibiting high specific capacitance and good energy. The asymmetric supercapacitor device shows high energy and power, and the nitrogen-doped carbon/g-C3N4 electrode also demonstrates high discharge capacity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Lina Ma, Wei Zhang, Renjie Zhang, Haijun Niu, Qun Yang, Fan Li, Min Zhou, Lixue Zhang, Yudong Huang
Summary: Hierarchical porous heteroatom-doped carbon frameworks with large specific surface area, high conductivity, and abundant active sites have been successfully achieved through topology design, in situ polycondensation reaction, and high-temperature carbonization. The optimal N,O-doped carbon nanosheets exhibit high heteroatom content, large specific surface area, and superior electrochemical performance, with a high energy density of 15.28 Wh kg-1 at 352.5 W kg-1.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Stella Vargheese, Dhanaprabhu Pattappan, K. Kavya, M. S. Sivaramkumar, Ramasamy Thangavelu Rajendra Kumar, Yuvaraj Haldorai
Summary: By preparing nitrogen-doped porous carbon (N-PC)/manganese dioxide (MnO2) composite, we successfully enhanced the capacitance of the supercapacitor and demonstrated good stability after cycling tests.
Article
Chemistry, Physical
Shuai Zhang, Sizhuan Li, Jiameng Liu, Lun Kan, Feilong Rong, Linghao He, Zhihong Zhang
Summary: In order to improve the yield and selectivity of H2O2, a novel method was proposed to embed cobalt catalytic active sites in a porous two-dimensional nitrogen-doped carbon network. The catalytic mechanism of the obtained hybrid was identified, and it exhibited high H2O2 production and selectivity in alkaline solution. The hybrid catalyst assembled in the cathode showed maximum H2O2 production with high Faradaic efficiency. This work demonstrated a novel strategy for identifying excellent electrocatalysts with multiple active sites and high production and selectivity for H2O2 synthesis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yue Sun, Shan Xue, Jinhua Sun, Xingxing Li, Yuchen Ou, Baohuan Zhu, Muslum Demir
Summary: Supercapacitors are attracting attention in energy storage fields due to their safety, cost-effectiveness, and environmental friendliness. Pore carbon materials derived from renewable biomass materials are important and cost-effective electrode materials for supercapacitors. However, the low ionic conductivity of biomass materials limits their electrochemical performance. This study introduces an immiscible liquid-mediated method to improve the ionic conductivity of silk-derived nitrogen-doped porous carbon electrodes. The addition of organic liquid promotes ion transport in the electrode pores, resulting in a specific capacitance of 565.3 F g-1 at a current density.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Wojciech Kicinski, Slawomir Dyjak, Mateusz Gratzke
Summary: Three types of cross-linked porous organic polymers were carbonized under a chlorine atmosphere to obtain microporous heteroatom-doped carbons. The study showed that the porosity and chemical composition of the carbon materials were significantly influenced by the pyrolysis and additional annealing conditions.
Article
Energy & Fuels
Gyawali Ghanashyam, Hae Kyung Jeong
Summary: A nitrogen-doped plasma treated carbon nanofiber was prepared for supercapacitor applications, showing significant improvements in specific capacitance, cyclic stability, and rate capability. With nitrogen doping, the electrochemical active surface area increased by four times, leading to a high specific capacitance of 495 Fg(-1) and excellent cyclic stability and rate capability.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Jiamei Yang, Fuquan Xiong, Hang Wang, Bole Ma, Feng Guo, Yan Qing, Fuxiang Chu, Yiqiang Wu
Summary: In this study, nitrogen-doped lignin-based carbon nanospheres (NCS) were successfully prepared and showed potential applications in supercapacitors. The introduction of nitrogen atoms increased the active site of the materials and improved the capacitance performance.
Article
Engineering, Chemical
Chunyu Chen, An Liu, Chi Fei, Bin Hui, Yingying Li, Deng Guan, Dianchun Ju
Summary: This study presents a scalable and eco-friendly process for the preparation of N-doped polyhedral macrotube carbon arrays. These arrays exhibit a high density of adsorption sites and good conductivity, making them suitable for use as electrodes in both supercapacitors and capacitive deionization cells. The N-ALS electrodes demonstrate high specific capacitance and excellent cycling stability in supercapacitors, as well as a high salt adsorption capacity and retention rate in capacitive deionization cells.
Article
Polymer Science
Tuo Di, Yujie Lei, Zhaohui Meng, Yunxia Xia, Xingyu Ma, Heng Jiang, Tiesheng Li, Tiansheng Zhao, Lei Li
Summary: A new family of microporous organic polymers combining asphalt with sulfur has been successfully developed using a one-pot and catalyst-free polymerization method. The resulting polymers have permanent porosity and exhibit excellent electrochemical performance.
Article
Materials Science, Ceramics
Han Zhu, Xiaoyan Sun, Huafang Yang, Yong'an Pang, Shiwo Ta, Lixi Wang, Haikui Zhu, Qitu Zhang
Summary: The study presents a simple and extensible method for preparing N-doped carbon-coated NiS core-shell composites at different temperatures and discusses the impact of pyrolysis temperature on the composites. The core-shell structure, along with the carbon layer, contributes to enhancing the electrochemical stability of NiS and adapting to volume changes during charge-discharge cycles. The NiS@NC-300 composite exhibits significantly improved specific capacity and cycle stability, making it a promising candidate for practical energy storage devices.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Eunsoo Lee, Minjae Kim, Jaechul Ju, Seokhoon Jang, Sung Hyeon Baeck, Sang Eun Shim
Article
Materials Science, Multidisciplinary
Michele Fromel, Devon M. Sweeder, Seokhoon Jang, Teague A. Williams, Seong H. Kim, Christian W. Pester
Summary: The study introduces a fully aqueous surface-initiated polymerization method for the formation of durable superhydrophilic polymer coatings. The approach utilizes water as a sole solvent and mild yellow light to improve durability and overcome traditional limitations related to monomer solubility and oxygen tolerance. Polymer films engineered through this method show promise as functional materials with enhanced durability, effectively combatting surface fogging challenges.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Seokhoon Jang, Zhe Chen, Seong H. Kim
Summary: Achieving superlubricity in ambient air is important for H-DLC coatings. This study investigates the tribochemical processes and environmental effects on the H-DLC surface, providing insights for improving its performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Seokhoon Jang, Seong H. Kim
Summary: This study used microscopic Raman analysis to investigate the structural characteristics of transfer films formed by HDLCs with different hydrogen contents in different gas environments. The results showed that the graphitization and hydrogenation of the shear plane varied with the HDLC structure and environmental conditions during the run-in and steady-state friction periods.
Article
Nanoscience & Nanotechnology
Seokhoon Jang, Muztoba Rabbani, Andrew L. L. Ogrinc, Maxwell T. T. Wetherington, Ashlie Martini, Seong H. H. Kim
Summary: The lubricity of hydrogenated diamond-like carbon (HDLC) films is influenced by the hydrogen content in the film and the oxidizing gas in the environment. Raman spectroscopic imaging and XPS were used to analyze the transfer layers formed on the counter-surface during friction tests, revealing the tribochemical knowledge of HDLC films with different hydrogen contents. The results showed that shear-induced graphitization and oxidation occurred readily, regardless of the hydrogen content in the film.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Yu-Sheng Li, Seokhoon Jang, Arman Mohammad Khan, Tobias V. Martin, Andrew L. Ogrinc, Q. Jane Wang, Ashlie Martini, Yip-Wah Chung, Seong H. Kim
Summary: The D- and G-band features observed in the Raman spectra of tribofilms produced from organic precursors resemble the characteristic bands of diamond-like carbon (DLC), amorphous carbon (a-C), or graphitic materials. This study provides experimental evidence that these features could be generated by photochemical degradation of triboproducts during Raman analysis, indicating that they are not unique to the structure of tribofilms produced via friction. Therefore, additional non-destructive characterization methods are necessary to determine the formation of DLC, a-C, or graphitic species tribochemically.
Article
Engineering, Chemical
Yu-Sheng Li, Seokhoon Jang, Fakhrul Hasan Bhuiyan, Ashlie Martini, Seong H. Kim
Article
Chemistry, Multidisciplinary
Seokhoon Jang, Jieun Kim, Eunbeen Na, Mingyu Song, Jinkyu Choi, KyongHwa Song, Sung-Hyeon Baeck, Sang Eun Shim
Article
Electrochemistry
Jaechul Ju, Minjae Kim, Seokhoon Jang, Yeongseon Kim, Yongheum Choi, Sung-Hyeon Baeck, Sang Eun Shim
ELECTROCHIMICA ACTA
(2017)
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)