Article
Materials Science, Multidisciplinary
Rajendra Kumar Nare, Sivalingam Ramesh, Vijay Kakani, Yuvaraj Haldorai, Chandrasekaran Karthikeyan, Basivi Praveen Kumar, Nadavala Siva Kumar, Mohammad Asif, S. Naresh Kumar, D. Prakash Babu, K. Ramakrishna Reddy, Visweswara Rao Pasupuleti
Summary: This study examines the latest advancements in carbon nanotube (CNT) supercapacitors and related composites, aiming to identify strategies for enhancing their performance. The researchers used ultrasonication aided hydrothermal technique to synthesize a composite made of nitrogen doped carbon nanotubes and porous NiCo2O4 nanomaterial. The composite electrode exhibited excellent cycling stability and a rising specific capacitance, making it appealing for high-performance supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Chemistry, Inorganic & Nuclear
Yaju Zhou, Chunyan Li, Xin Li, Pengwei Huo, Huiqin Wang
Summary: The highly dispersed nitrogen-doped carbon (N-C) is decomposed by 2-methylimidazole and used as a composite material with nickel cobaltite (NiCo2O4). The N-C/NiCo2O4 composites exhibit excellent specific capacitance and the N-C is able to control the morphology and structure of NiCo2O4 to obtain excellent capacitor materials. The N-C/NiCo2O4//AC asymmetric supercapacitor demonstrates promising performance for portable applications with excellent volumetric energy density.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Chengchao Wang, Xingyue Wu, Yong Qin, Yong Kong
Summary: Reduced Mo-doped NiCo2O4 prepared through a dual-defect strategy exhibits enhanced electrical conductivity and facilitated charge transfer. As an electrode material in supercapacitors, it shows higher specific capacity, rate capability, and cycling stability.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Maalavika S. Iyer, Ilangovan Rajangam
Summary: Composites of graphene variants were synthesized and their electrochemical performance was systematically analyzed. The results showed that physical properties played an important role in the performance, and nitrogen doped counterparts exhibited enhanced conductivity and capacitive behavior, as well as good cyclability.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Bo Yuan, Zilong Su, Kaixuan Chen, Jiajun Wang, Bowen Chen, Shixin Jiang, Jinyang Yan, Chen Zhang, Aijuan Xie, Shiping Luo
Summary: Dendritic NiCo2O4/MWCNT-x/PC-y composite materials based on lignin derived-porous carbon as skeleton and MWCNT as stem, NiCo2O4 as fruit were successfully synthesized, and exhibited superior electrochemical performance as supercapacitor electrode material. The combination of lignin derived-porous carbon, MWCNT, and NiCo2O4 enhanced intrinsic activity, resulting in a higher specific capacitance compared to pure NiCo2O4. The NiCo2O4/MWCNT-0.25/PC-0.48 composite showed the lowest Rct value and about 78% capacitance retention rate after 5000 cycles, making it a promising candidate for supercapacitors.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Energy & Fuels
Jing Li, Yin Liu, Dan Zhan, Yongjin Zou, Fen Xu, Lixian Sun, Cuili Xiang, Jian Zhang
Summary: Transition metal oxides, such as NiCo2O4 embedded N-doped carbon (NC) composite, have been synthesized for energy storage applications, exhibiting high specific capacitance and specific energy. The superior electrochemical performance of the NiCo2O4@NC electrode is attributed to the microenvironment provided by NC for Faradic reaction of NiCo2O4, and the ultrahigh specific capacitance conferred by NiCo2O4 to the composite.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Inorganic & Nuclear
Qingqing Zhao, Kai Tao, Lei Han
Summary: Ultra-thin nanosheet arrays with oxygen vacancies are constructed using a facile reduction method, improving the electrochemical performance of NiCo2O4.
DALTON TRANSACTIONS
(2022)
Review
Chemistry, Analytical
Himadri Tanaya Das, Swapnamoy Dutta, Tamilarasan Elango Balaji, Nigamananda Das, Payaswini Das, Neelu Dheer, Rajni Kanojia, Preety Ahuja, Sanjeev Kumar Ujjain
Summary: Flexible supercapacitors have attracted great attention due to their outstanding electrochemical performance, long cyclability, and mechanical flexibility. Carbon nanotubes are potential candidates for flexible supercapacitor electrodes, given their mechanical toughness, high electrical conductivity, and assemblage adaptability. This review summarizes the various assemblies of carbon nanotube structures and their applications in flexible supercapacitor devices, as well as discusses the electrochemical performance and additional properties of fabricated flexible devices.
Article
Chemistry, Multidisciplinary
Duan-Chao Wang, Hou-Yong Yu, Zhaofeng Ouyang, Dongming Qi, Ying Zhou, Anqi Ju, Ziheng Li, Yiwen Cao
Summary: In this study, composite fibers with chain-ring structures were prepared by connecting cellulose nanofiber (CNF) and multi-walled carbon nanotubes (MWCNT) covalently, solving the problems of MWCNT aerogel formation and phase separation during compounding. The resulting aerogels exhibited mechanical resilience and chain-ring fibers, enabling high compression resistance and application in flexible supercapacitors and sensors.
Article
Chemistry, Multidisciplinary
Mei-Jiao Zeng, Xiaofeng Li, Shu-Meng Hao, Jin Qu, Wei Li, Jing Wu, Tianyu Zhao, Zhong-Zhen Yu
Summary: Hierarchically porous graphene/wood-derived carbon (GWC) aerogels and activated GWC (AGWC) anode were prepared to enhance the performance of supercapacitor electrodes. The high capacitance and cycling stability were achieved through the synthesis of NCO@GWC cathode and AGWC anode.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Dong Li, Faheem Raza, Qilin Wu, Xiaohang Zhu, Anqi Ju
Summary: This study presents a flexible all-solid-state supercapacitor with enhanced specific capacitance and cycling stability by using N-doped hollow carbon nanofibers and NiCo2O4 nanosheets. The symmetrical all-solid-state supercapacitors show good flexibility and a high energy density, making them promising for wearable and portable devices applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Applied
Yu Wang, Minzhang Li, Rajendran Ramachandran, Haiquan Shan, Qian Chen, Anxin Luo, Fei Wang, Zong-Xiang Xu
Summary: This study reports a novel nanocomposite based on octamethyl-substituted nickel(II) phthalocyanine as the electrode material for all-solid-state supercapacitors. The nanocomposite provides rapid electron and electrolyte ion transport pathways, excellent structural stability, and high-capacity activity. The optimized weight ratio of the composite exhibits the highest specific capacitance and impressive cycling stability. In addition, flexible carbon cloth enhances the energy density and capacitance retention of the device, making it suitable for flexible electronics applications.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Energy & Fuels
Yuri Zakharov, Galina Simenyuk, Ekaterina Kachina, Valery Pugachev, Vadim Dodonov, Denis Yakubik, Tatiana Trosnyanskaya, Zinfer Ismagilov
Summary: Nanostructured composites (NSCs) based on multiwalled carbon nanotubes (MWCNTs) filled with individual and mixed Ni/Co hydroxides nanoparticles were prepared, showing a significant increase in electrical capacitance, especially within the 5-10 wt% filler content range. The precipitation process of hydroxides also plays a role in influencing the morphology and capacitance performance of the fillers.
Article
Chemistry, Multidisciplinary
Chandra Sekhar Bongu, Mohan Raj Krishnan, Abdelrahman Soliman, Muhammad Arsalan, Edreese H. Alsharaeh
Summary: This study reports the preparation of three composite materials via a simple ball-milling method and analyzes their performance as supercapacitor electrodes. These composites, especially the MoS2@Graphene (1:9) composite, show improved capacitance compared to pristine graphene and MoS2. The MoS2@Graphene (1:9) composite electrode exhibits high specific capacitance in an electrochemical supercapacitor and is flexible with a long lifespan.
Review
Energy & Fuels
Xu Wang, Changyi Deng, Xiaodong Hong, Wei Dong, Bing Liang
Summary: This article highlights the research advances of NiCo2O4 and NiCo2O4/graphene composites in supercapacitors. It introduces the controllable synthesis and electrochemical performance of NiCo2O4, as well as the commonly used methods for its preparation. The article also classifies NiCo2O4/graphene composites into two-dimensional and three-dimensional based on the dimension feature of the graphene matrix, and summarizes their design principles, microstructure, and application performance in supercapacitors. Finally, it discusses the existing problems and proposes solving strategies and future perspectives for NiCo2O4 and NiCo2O4/graphene composites.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Y. J. Xu, S. Y. Song, C. X. Li, B. Hong, D. S. Shi, J. C. Xu, Y. B. Han, H. X. Jin, D. F. Jin, X. L. Peng, J. Gong, H. L. Ge, X. Q. Wang
Summary: Porous perovskite lanthanum ferrites powders were synthesized under different pH values and showed good performance in magnetic properties, photocatalytic activity, and gas-sensing performance. The LF-1 sample prepared at pH = 1 exhibited the highest removal rate of MB, the largest saturation magnetization, and the best gas response to ethanol.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
L. Wang, S. Y. Song, B. Hong, J. C. Xu, Y. B. Han, H. X. Jin, D. F. Jin, J. Li, Y. T. Yang, X. L. Peng, H. L. Ge, X. Q. Wang
Summary: Mesoporous Co3O4 nanowires were synthesized using the nanocasting method and separated into dispersed and bundled nanowires. The microstructures and morphology significantly affect toluene gas sensing performance, with mesoporous structures exhibiting higher sensitivities and more stability. The gas-sensing mechanism involves surface oxygen and toluene gas adsorption, resulting in excellent performance in both samples.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Nanoscience & Nanotechnology
J. Y. Niu, L. Wang, B. Hong, J. C. Xu, Y. B. Han, H. X. Jin, Y. X. Zeng, X. L. Peng, H. L. Ge, X. Q. Wang
Summary: High surface area nickel oxide nanowires (NiO NWs), Fe-doped NiO NWs and alpha-Fe2O3/Fe-doped NiO NWs were synthesized with nanocasting pathway and characterized with various techniques. Fe-dopant and alpha-Fe2O3-loading improved gas-sensing performance of the sensors, with alpha-Fe2O3/Fe-doped NiO NWs sensors showing the best response to ethanol gas due to the formation of heterogeneous contact at the interface. The sensors with uniform mesoporous structures exhibited enhanced gas-sensing properties.
Article
Nanoscience & Nanotechnology
D. S. Shi, B. Hong, J. N. Mao, S. Y. Song, C. X. Li, J. C. Xu, Y. B. Han, H. X. Jin, X. L. Peng, J. Gong, H. L. Ge, X. Q. Wang
Summary: Ternary magnetic Fe3O4@ZnO/g-C3N4 nanocomposites were synthesized for the photodegradation of methylene blue, showing significantly higher photocatalytic activity than pristine g-C3N4 and Fe3O4@ZnO. The efficient separation of photogenerated electrons and holes at the heterojunction interface led to increased radicals production for MB degradation. Fe3O4@ZnO/g-C3N4 (20%) exhibited the highest MB removal of 93.74% and could be easily separated from solution using magnetic separation.
Article
Engineering, Electrical & Electronic
Minghui Ge, Xiaoling Peng, Jing Li, Tristan Ellis, Yanting Yang, Jingcai Xu, Bo Hong, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: Fe3N/Fe core-shell particles were prepared by gas nitriding and then pressed into Fe3N/Fe soft magnetic composites. The results showed that the saturation magnetization decreased and the remanence and coercivity increased with the increase of Fe3N phase content. The 5-h nitridated sample exhibited the best frequency stability.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Zhao Zhang, Jiasong Chang, Xiaoling Peng, Jing Li, Yanting Yang, Jingcai Xu, Bo Hong, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: In this study, flaky FeSiB/Al2O3 soft magnetic composites (SMCs) were prepared with the parallel or perpendicular orientation of an external magnetic field. It was found that anisotropic structures were formed in the FeSiB/Al2O3 SMCs, and the parallel orientation of FeSiB particles in the working magnetic circuit significantly optimized the DC and AC magnetic properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Donglin Li, Junfeng Lu, Xuanji Zhang, Xiaolin Peng, Jing Li, Yanting Yang, Bo Hong, Xinqing Wang, Dingfeng Jin, Hongxiao Jin
Summary: Gas sensors based on hybrid materials of reduced graphene oxide/metal oxide semiconductors improve sensor performance by creating a reversible p-n transition behavior. This study demonstrated the synthesis of a np-type heterojunction structure by anchoring reduced graphene oxide on the surface of zinc oxide rods. The reversible p-n transition was controlled and designed based on a binary (T-C) transition diagram created using familiar phase diagrams.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Z. F. Gu, Y. J. Xu, B. Hong, J. C. Xu, Y. B. Han, H. X. Jin, D. F. Jin, X. L. Peng, J. Gong, H. L. Ge, X. Q. Wang
Summary: In this study, g-C3N4/LaFeO3 nanocomposites were successfully synthesized with well-dispersed LaFeO3 nanoparticles on g-C3N4 nanosheets. The g-C3N4/LaFeO3 nanocomposites exhibited excellent photocatalytic activity for the degradation of tetracycline hydrochloride (TC-HCl) antibiotics under visible light irradiation, with a degradation efficiency 13.6-fold and 2.6-fold higher than pristine LaFeO3 nanoparticles and g-C3N4 nanosheets, respectively. The p-n heterojunctions of g-C3N4/LaFeO3 effectively separated photogenerated electrons and holes, leading to the enhanced photocatalytic activity. Moreover, the dominant radical during the photodegradation process was found to be center dot O-2(-) according to active species trapping experiments.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Polymer Science
WanTong Liu, Tianshou Yu, Zhifeng Dai, Ming Zhang, Hongxiao Jin, Hongliang Ge, Xinqing Wang, Dingfeng Jin, Hui Lou
Summary: This study focuses on the utilization of waste lithium-manganese batteries to develop efficient catalysts for the degradation of formaldehyde. The findings suggest that the continuous doping of Li+ and the conversion of Mn(IV) to Mn(III) during the discharge process contribute to the enhancement of the catalyst's degradation efficiency. Additionally, the increase in discharge level promotes the catalytic activity of the catalyst for formaldehyde degradation. The results provide an attractive approach for converting waste lithium battery electrode materials into formaldehyde degradation catalysts to improve indoor air quality.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Junfeng Lu, Donglin Li, Xianjia Chen, Xiaolin Peng, Jing Li, Yanting Yang, Bo Hong, Xinqing Wang, Dingfeng Jin, Hongxiao Jin
Summary: In this study, room temperature NO2 sensors based on ZnO/rGO nanocomposites were successfully fabricated using a facile hydrothermal method. The sensors showed p-type sensing behavior towards NO2 and the content of rGO had a significant impact on the sensing properties. The ZnO NPs-1% rGO sensor exhibited a high response to 10 ppm NO2 with a response/recovery time of 198/144 s, indicating its potential for practical applications.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Chemistry, Physical
Wanjiao Li, Jing Li, Xiaoling Peng, Jiaxin Xu, Yanting Yang, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: Single-phase yttrium iron garnet (YIG) ferrite was synthesized by sol-gel method and used as the insulating layer for Fe/YIG soft magnetic composites (SMCs). The Fe powders were evenly coated with the YIG ferrite. The study investigated the effect of YIG content on the soft magnetic properties of the Fe/YIG SMCs and found that the core loss decreased initially and then increased with increasing YIG content. Moreover, the Fe/YIG SMCs exhibited improved permeability compared to pure Fe when the YIG content was between 1.0 wt% and 3.0 wt%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Donglin Li, Junfeng Lu, Xuanji Zhang, Dingfeng Jin, Hongxiao Jin
Summary: In this study, ZnO nanoparticles were loaded with 0.1% to 4% rGO using a hydrothermal method and evaluated as NO2 gas chemiresistors. The doping ratio was found to affect the sensing properties, with the conductivity type of ZnO/rGO changing from n-type to mixed n/p-type and finally to p-type. Different sensing regions exhibited different sensing characteristics, and the p-n heterojunction ratio played a key role in the optimal response condition.
Article
Nanoscience & Nanotechnology
Yixuan Huang, Donglin Li, Wenxiang Chai, Dingfeng Jin, Hongxiao Jin
Summary: To enhance the gas sensing property of MoS2 nanoflowers, fluorine was doped using a hydrothermal method. The fluorine-doped samples showed shorter recovery time and increased sensitivity compared to pure MoS2. This study contributes to the development of new molybdenum sulfide-based gas sensor.
Article
Chemistry, Multidisciplinary
Ke Huang, Junfeng Lu, Donglin Li, Xianjia Chen, Dingfeng Jin, Hongxiao Jin
Summary: In order to improve the gas sensitivity of NO(2) room-temperature sensors based on reduced oxide graphene (rGO), ternary hybrids were synthesized by combining different contents of rGO, ZnO rods, and noble metal nanoparticles (Au or Ag NPs) to utilize the advantages of each component. The presence of rGO in the ZnO-rod/rGO hybrid facilitated the diffusion of gas molecules by preventing rGO stacking and creating a porous structure. Among the tested hybrids, Ag@ZnO rods-2% rGO and Au@ZnO rods-2% rGO exhibited better gas-sensing properties for low concentrations of NO(2), with higher response and shorter recovery time.
Article
Chemistry, Physical
Donglin Li, Junfeng Lu, Xuanji Zhang, Xiaolin Peng, Jing Li, Yanting Yang, Bo Hong, Xinqing Wang, Dingfeng Jin, Hongxiao Jin
Summary: Gas sensors based on reduced graphene oxide/metal oxide semiconductors improve sensor performance. The combination of reduced graphene oxide and ZnO rods forms an np-type heterojunction structure for a nitrogen dioxide sensor. The composites exhibit reversible sensing behavior induced by changes in gas concentration and temperature. The study provides potential applications for efficient NO2 detection.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Electrochemistry
Wenhai Tan, Youfeng Zhang, Yichen Zhang, Yanbo Ma, Chao Zhao, Yinling Wang
Summary: This study synthesized Co3O4/CC cathode materials with excellent performance for aqueous zinc-ion batteries by varying the reactant concentration. The Co3O4/CC nanowires exhibited uniform distribution, regular surface, and small size on the carbon cloth. The battery assembled with Co3O4/CC material synthesized at a reactant concentration ratio of 2:1 showed better performance, with high discharge specific capacity and capacity retention rate.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Article
Electrochemistry
T. Salahuddin, Iqra Kousar, Mair Khan, M. Munawwar Iqbal Ch
Summary: This paper investigates the dynamics of fluid motion powered by cilia within a curved channel and examines the chemical reactions occurring in the presence of electro-osmotic impact. The findings offer insights into various flow characteristics and present a method for simulating non-Newtonian fluid models in three dimensions. Additionally, the model has potential applications in the development of micro-vascular chips, which could be crucial for diagnosing blood-related issues.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Review
Electrochemistry
Ahmed Abou-Shady
Summary: Soil electrokinetic (SEK) is a significant technology with various applications in fields such as soil remediation, pollutant removal, and water regulation. This review summarizes the recent advancements in SEK, focusing on electrode modifications and material additives, and suggests future research directions.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
