Article
Chemistry, Multidisciplinary
Munan Lu, Yi Cao, Yufeng Xue, Wenfeng Qiu
Summary: Graphene oxide/lanthanum titanate fiber composites prepared through a hydrothermal method showed high specific capacitance and energy density in a 1M H2SO4 and 10wt% sucrose aqueous solution electrolyte. The composites could be promising materials for energy storage applications.
Review
Chemistry, Multidisciplinary
Huihui Zhang, Dan Yang, Alan Lau, Tianyi Ma, Han Lin, Baohua Jia
Summary: Graphene-based supercapacitors have attracted attention due to their excellent properties, but face limitations in electrode surface area and conductivity. Hybridizing graphene with other species to improve performance is necessary. This review discusses different hybridization principles and summarizes recent progress and future directions for hybridized graphene electrodes.
Article
Chemistry, Multidisciplinary
Shiqi Lin, Jie Tang, Kun Zhang, Youhu Chen, Runsheng Gao, Hang Yin, Lu-Chang Qin
Summary: The relationship between oxygen-containing functional groups in graphene and supercapacitor stability was investigated. Different oxygenic functional groups were introduced in reduced graphene oxide (rGO) by varying the reduction time. The study revealed that longer reduction time resulted in restoration of the sp(2) structure in the rGO sheet, increased crystallinity, and removal of oxygenic functional groups. The presence of oxygenic functional groups contributed to pseudocapacitance and larger specific capacitance, but also led to poorer rate performance and durability. By extending the reduction time, the oxygenic functional groups can be effectively removed and the stability of rGO can be improved.
NANOSCALE ADVANCES
(2023)
Article
Energy & Fuels
Hualan Wang, Risheng Liu, Xue Liu, Langyuan Wu, Yan Li, Xiaogang Zhang
Summary: The study demonstrates that the SiO2 embedded graphene hybrid is an effective strategy to enhance the overall electrochemical properties of supercapacitors, allowing for better utilization of the electric double layer capacitance of graphene and pseudocapacitance of polyaniline.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Multidisciplinary Sciences
Anna Ilnicka, Malgorzata Skorupska, Mariusz Szkoda, Zuzanna Zarach, Piotr Kamedulski, Wojciech Zielinski, Jerzy P. Lukaszewicz
Summary: The study shows that controlling nitrogen doping levels and specific surface areas of carbon can lead to high electrochemical capacitance. Nitrogen functional groups have an impact on pseudocapacitance, with graphite-N/quaternary-N being the most important functional group affecting energy storage performance.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Analytical
Megala Moorthy, M. Karnan, S. Suresh Balaji, S. Gokulnath, M. Sathish
Summary: In this research, activated carbon derived from beetroot was used as the electrode material for supercapacitors, with the incorporation of redox additives to enhance electrochemical performance in aqueous electrolytes. The use of hydroquinone as a redox additive resulted in a high specific capacity for the prepared electrode, as well as superior power and energy density compared to traditional electrolytes.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Physics, Applied
Jhilmil Swapnalin, Bhargavi Koneru, Ramyakrishna Pothu, Prasun Banerjee, Rajender Boddula, Ahmed Bahgat Radwan, Noora Al-Qahtani
Summary: Surface modification of Ti3C2Tx improves its charge storage mechanism as an electrode material. The role of surface terminals and heteroatoms in the electrochemical behavior of Ti3C2Tx electrodes is demonstrated. Abundant reaction sites and larger interlayer spacing help to improve the specific capacitance by nearly 2.5 times without sacrificing the conductivity and accordion-like structure of Ti3C2Tx MXene.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xuming Du, Jiale Sun, Runze Wu, Enhui Bao, Chunju Xu, Huiyu Chen
Summary: In this work, uniform MnCo2O4.5 nanowires and quasi-cubes were successfully prepared via a hydrothermal method, showing excellent electrochemical performance in supercapacitors. The hybrid supercapacitor device assembled with these materials demonstrated high capacity, cycling durability, and energy density, indicating promising potential for advanced energy storage applications.
NANOSCALE ADVANCES
(2021)
Article
Automation & Control Systems
Yi-Fang Hung, Chia Cheng, Chun-Kai Huang, Chii-Rong Yang, Shih-Feng Tseng
Summary: This study investigated the electrochemical reduction of graphene oxide powders with different bias voltages and treatment times, demonstrating that using a bias of -17.5 V for 2 hours produced the best reduced GO powders. The resulting rGO showed increased carbon to oxygen ratios, enhanced electrical conductivity, and improved specific capacitance, making them suitable for high-performance supercapacitors.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Energy & Fuels
Ganghyun Jang, Thangavel Kavinkumar, Do-Heyoung Kim
Summary: Graphene-based flexible supercapacitors offer high-power densities, quick charging/discharging rates, and excellent cycle lives. By controlling the oxygen content and surface morphology, the supercapacitive properties of graphene nanosheets can be improved.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Sukanya Maity, J. E. Madhusree, Bhimaraya R. Biradar, Pranay R. Chandewar, Debaprasad Shee, Partha Pratim Das, Sib Sankar Mal
Summary: Supercapacitors are emerging as a high-performance, safe, clean, and economical way to store and release nonfossil energy. Designing hybrid materials by integrating double-layer and pseudocapacitive materials is crucial to achieving high-power and high-energy storage devices simultaneously. The synthesized polyoxomolybdate-polypyrrole-graphene oxide nanohybrid exhibits excellent interfacial contact, fast redox reaction, and high specific energy and power.
Article
Chemistry, Multidisciplinary
Haoyu Jiao, Tingting Feng, Shu Zhang, Mengqiang Wu
Summary: This study synthesized composites of ZnCo2O4/NiCo2S4 (ZCO/NCS) nanosheet arrays and used them in high-performance supercapacitors. The ZCO-20/NCS composite electrodes showed excellent electrochemical performance. The effects of deposition conditions on the morphologies and electrochemical properties were also investigated.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Electrochemistry
Alberto Morenghi, Silvio Scaravonati, Giacomo Magnani, Michele Sidoli, Lucrezia Aversa, Roberto Verucchi, Giovanni Bertoni, Mauro Ricco, Daniele Pontiroli
Summary: Thermal exfoliation of graphite oxide is a scalable method to produce defective graphene-based compounds as electrode materials for high-performance electrochemical supercapacitors. Decorating defective graphene with Ni nanoparticles enhances the specific capacitance of the electrodes by one order of magnitude, reaching up to 1900 F/g. An asymmetric supercapacitor fabricated with a pure graphene negative electrode and a Ni-decorated graphene positive electrode demonstrates good reversibility and stability in an aqueous electrolyte.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Wenshi Li, Wei Yang, Maosheng Wu, Man Zhao, Xianmao Lu
Summary: Graphene-based supercapacitors have self-discharge behavior, which limits their long-term energy storage applications. This study shows that a self-polymerized dopamine coating on the graphene surface can reduce self-discharge, leading to improved specific capacitance and rate performance.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Inorganic & Nuclear
S. Karthikeyan, M. Selvapandiyan, A. Sankar
Summary: La2O3 nanoparticles decorated reduce graphene oxide nanosheets were synthesized to be used as electrode material in high performance supercapacitor. The hybrids exhibited enhanced electrochemical performance and cycling stability, demonstrating high energy density and cycle retention rate in the two-electrode system. The enhancement of specific capacitance is explained by the charge transfer effect between rGO and La2O3 at the interface.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Hengbo Xiao, Kai Chi, Hongxia Yin, Xiangji Zhou, Pengxiang Lei, Peizhi Liu, Jiakun Fang, Xiuhong Li, Songliu Yuan, Zhen Zhang, Yaqiong Su, Junjie Guo, Lihua Qian
Summary: Oxygen vacancies in transition metal oxides can be used to modulate surface reconstruction for enhancing the oxygen evolution reaction (OER). In this study, oxygen vacancies were specifically localized within MoO4 tetrahedrons rather than CoO6 octahedrons in the CoMoO4 catalyst, resulting in the coherent reconstruction of CoO6 octahedrons into pure CoOOH with tunable OER activities. The manipulated distorted polyhedrons facilitated the complete transformation of CoO6 octahedrons into pure CoOOH at lower potentials, leading to a significantly improved intrinsic activity for OER.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Zhen Zhang, Zhiqiang Wang, Hang Zhang, Zikuan Zhang, Jingwei Zhou, Ying Hou, Peizhi Liu, Bingshe Xu, Haixia Zhang, Junjie Guo
Summary: Transition metal hydroxide heterostructures, such as the Co(OH)(2)/La(OH)(3)@Cu NWs, have been developed as efficient catalysts for electrocatalytic water splitting with low overpotentials and good stability. These heterostructure catalysts exhibit outstanding hydrogen evolution reaction (HER) activities with an ultralow overpotential of 36 mV at 10 mA cm(-2) and excellent alkaline oxygen evolution reaction (OER) performance with an overpotential of 273 mV at 100 mA cm(-2). The electrolytic cell using the CH/LH@Cu NW catalyst as the anode and cathode requires only 1.56 V to achieve a current density of 20 mA cm(-2) and demonstrates preferable long-term stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Jing Wang, Bingxin Guo, Junting Sun, Yingshuang Zhou, Chengfei Zhao, Zhongzhe Wei, Junjie Guo
Summary: The design and construction of electrocatalysts with multiple components is an effective strategy to achieve Pt-like activity for hydrogen generation. In this study, a novel CuRu-based electrocatalyst (RuCuOx/NC) is established using dual-templates assembling and pyrolysis protocol, followed by hot-alkali corrosion. The RuCuOx/NC shows excellent activity and stability under alkaline conditions, providing Pt-like activity with an overpotential of around 29 mV to reach 10 mA cm(-2) in 1 M KOH. The synergistic effect of Cu2+1O (with copper excess defects) and Ru accelerates H2O dissociation and optimizes hydrogen adsorption. This work proposes a promising methodology to construct multi-components electrocatalysts for renewable energy systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Guangda Zhou, Xiaoli Yan, Tianyu Zhang, Kui Wang, Jingtao Zhang, Junjie Guo
Summary: In this study, a novel nanocapsules with cobalt core and nitrogen-doped carbon shells (Co@NC) supported on MOFs-derived hierarchical porous carbon framework was reported. The hierarchical porous carbon framework with controllable size and micropore/mesoporous ratio was achieved by one-step pyrolysis. The 0.4Co@NC-900 electrocatalyst shows excellent oxygen reduction reaction (ORR) activity in the pH-universal range.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Donghua Wang, Kaikai Ma, Jiamao Hao, Wenyuan Zhang, Haofeng Shi, Chengdeng Wang, Zhihao Xiong, Zhiming Bai, Fu-Rong Chen, Junjie Guo, Bingshe Xu, Xiaoqin Yan, Yousong Gu
Summary: Developing an electrocatalyst that can improve the performance of lithium-sulfur batteries is crucial. The utilization of traditional metal electrocatalytic nanoparticles has not met expectations. In this study, a single-atom catalyst with a nitrogen-doped graphene mesh is engineered to achieve high efficiency in catalytic conversion of lithium polysulfides. The catalyst suppresses shuttle effect and enhances sulfur redox kinetics, leading to improved battery performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jingwei Zhou, Zhen Zhang, Qiheng Wang, Mao Mao, Haixia Zhang, Ying Hou, Junjie Guo
Summary: Constructing heterostructured electrode materials is a promising strategy for improving the performance of supercapacitors. In this study, novel nanoarrays with Cu(OH)2 nanorod cores and nickel oxalate shells were grown on copper foam as electrode materials for boosting the performance of supercapacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Junting Sun, Qindong Zhang, Yatao Chang, Jing Wang, Bin Lu, Junjie Guo
Summary: A facile strategy to enhance the performance of porous carbon based hybrid electrocatalysts is proposed, by extracting cobalt within the carbon layers through catalyzing the growth of nitrogen-doped carbon nanotubes (NCNTs). The obtained Co-catalyzed NCNTs possess enhanced stability and optimized catalytic activity, making them applicable for oxygen reduction reaction (ORR) and zinc-air batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Huifeng Tian, Yinhang Ma, Zhenjiang Li, Mouyang Cheng, Shoucong Ning, Erxun Han, Mingquan Xu, Peng-Fei Zhang, Kexiang Zhao, Ruijie Li, Yuting Zou, PeiChi Liao, Shulei Yu, Xiaomei Li, Jianlin Wang, Shizhuo Liu, Yifei Li, Xinyu Huang, Zhixin Yao, Dongdong Ding, Junjie Guo, Yuan Huang, Jianming Lu, Yuyan Han, Zhaosheng Wang, Zhi Gang Cheng, Junjiang Liu, Zhi Xu, Kaihui Liu, Peng Gao, Ying Jiang, Li Lin, Xiaoxu Zhao, Lifen Wang, Xuedong Bai, Wangyang Fu, Jie-Yu Wang, Maozhi Li, Ting Lei, Yanfeng Zhang, Yanglong Hou, Jian Pei, Stephen J. Pennycook, Enge Wang, Ji Chen, Wu Zhou, Lei Liu
Summary: By varying the growth temperatures, the degree of disorder and electrical conductivity of amorphous carbon films can be tuned, revealing the causal link between microstructures and macroscopic properties of amorphous materials.
Article
Chemistry, Physical
Bingxin Guo, Chengfei Zhao, Yingshuang Zhou, Junjie Guo, Zhongzhe Wei, Jing Wang
Summary: Alkali metals are used to control the valence, size, and dispersion of Ru NPs in a pH-universal hydrogen evolution catalyst. The alkali metal additives contribute to the dispersion and stabilization of metallic Ru, and the interaction between Na and Ru regulates the distribution of Ru valence states. Additionally, NaCl acts as a template to promote mass transfer and expose more active sites, further enhancing the catalytic performance of Ru.
Review
Oncology
Hai Guo, Hong-Tao Tang, Wen-Long Hu, Jun-Jie Wang, Pei-Zhi Liu, Jun-Jie Yang, Sen-Lin Hou, Yu-Jie Zuo, Zhi-Qiang Deng, Xiang-Yun Zheng, Hao-Ji Yan, Kai-Yuan Jiang, Heng Huang, Hai-Ning Zhou, Dong Tian
Summary: Esophageal cancer is a common and fatal malignant tumor worldwide. Neoadjuvant therapy combined with surgery is the standard treatment for locally advanced esophageal cancer. However, the efficacy of this treatment varies among patients. Currently, there is a lack of accurate and uniform criteria for evaluating efficacy after neoadjuvant therapy. Radiomics, a non-invasive image analysis method, has emerged as a promising approach for predicting efficacy and prognosis of esophageal cancer by analyzing high-throughput imaging features. In this literature review, we discuss the definition and workflow of radiomics, advances in efficacy prediction after neoadjuvant therapy, and the current application of radiomics in this field.
FRONTIERS IN ONCOLOGY
(2023)
Article
Engineering, Environmental
Hang Zhang, Zikuan Zhang, Zhen Zhang, Yongfeng Li, Ying Hou, Peizhi Liu, Bingshe Xu, Haixia Zhang, Yanzhen Liu, Junjie Guo
Summary: We have successfully synthesized a novel hybrid catalyst (FePc-NHCS-500) by coupling dispersed FePc molecule clusters into defect-rich nitrogen-doped hollow porous carbon spheres (NHCS). The well dispersed ultrasmall FePc molecule clusters exhibit excellent ORR performance due to the confining effect of mesopores in the NHCS. Moreover, the assembled Zn-air battery using FePc-NHCS-500 as air electrode shows excellent performance with an open circuit voltage (OCV) of 1.524 V, peak-power density of 230 mW cm-2, and specific capacity of 808.7 mAh g-1.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Qian Yan, Runhua Yao, Guozheng Li, Junjie Guo, Bo Zhao, Jie Li, Ruiqiang Hang, Hua Wang
Summary: In this study, two red emitters TPA-QxPy and Cz-Ph-QxPy with aggregation-induced emission characteristics were designed and synthesized. TPA-QxPy showed a strong charge transfer state, while Cz-Ph-QxPy had intramolecular hydrogen bonds to form hybridized local and charge-transfer state. Cz-Ph-QxPy-based organic light-emitting diode achieved highly efficient red emission with external quantum efficiency of 7.56% at 580 nm.
Article
Chemistry, Inorganic & Nuclear
Chenshan Lv, Hailiang Cao, Wei Deng, Min Zhao, Yanqin Miao, Chunli Guo, Peizhi Liu, Yucheng Wu
Summary: This study reports hollow carbon nanofibers filled with carbon nanotubes (HCNF/CNT) as host materials for sulfur, which can mitigate the shuttling behavior of polysulfides and improve the kinetics of insulative sulfur. The sulfur-encapsulated HCNF/CNT cathode materials exhibit excellent electrochemical performance in Li-S batteries, including high specific capacity, good rate performance, and cycling stability.
DALTON TRANSACTIONS
(2023)
Article
Mathematics, Interdisciplinary Applications
Peizhi Liu, Yumeng DU, Yongshun Liang
Summary: This paper investigates the fractal dimension of the product of continuous functions with Box dimension on [0, 1]. It has been proven that for two continuous functions with different Box dimensions, the Box dimension of their product is the larger one. Furthermore, the Box dimension of the product of two continuous functions with the same Box dimension may not exist. Definitions of regular fractal and local fractal functions are given. It is noted that the product of a regular fractal function and a local fractal function with the same Box dimension will still have the original Box dimension.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2023)
Meeting Abstract
Chemistry, Physical
Hai-liang Cao, Liang-tao Yang, Min Zhao, Pei-zhi Liu, Chun-li Guo, Bing-she Xu, Jun-jie Guo