Article
Chemistry, Physical
Abdul Rehman Akbar, Adil Saleem, Abdur Rauf, Rashid Iqbal, Muhammad Tahir, Gangqiang Peng, Abdul Sammed Khan, Arshad Hussain, Muhammad Ahmad, Mansoor Akhtar, Mumtaz Ali, Chuanxi Xiong, Quanling Yang, Ghaffar Ali, Fude Liu
Summary: In this study, a dually activated carbon cloth is used as the functional current collector to design a high-performance freestanding asymmetric supercapacitor. The integrated electrode shows exceptional capacitance performance and enhanced areal energy and power density. The device exhibits a broad voltage window and extraordinary cycling stability.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
R. Ramesh Kannan, N. Lenin, A. Aseema Banu, M. Sivabharathy
Summary: In this study, MnO2 is tailored in MWCNT for supercapacitor applications. The developed MnO2/MWCNT nanocomposites exhibit high energy storage capacity, with the hexagonal structure of graphite and the tetragonal structure of birnessite type MnO2 confirmed by XRD peaks. TEM analysis reveals the presence of high purity manganese nanoparticles on the MWCNT sidewalls. CV studies show that the composite electrode's specific capacitance surpasses 314F/g, demonstrating the potential of the tailored MnO2/MWCNT nanocomposites as the best electrode material for supercapacitor applications.
Article
Chemistry, Multidisciplinary
Ju-Hwan Kim, Hye-Min Lee, Sang-Chul Jung, Dong-Chul Chung, Byung-Joo Kim
Summary: A mesoporous activated carbon (PB-AC) was prepared from bamboo, with modifications using phosphoric acid and steam activation to tune the crystal structure and pore characteristics. The PB-AC exhibited high specific surface area and mesopore-rich nature, making it a suitable electrode material for EDLCs.
Article
Engineering, Environmental
Youlin Li, Yanmeng Cai, Yue Wang, Dexi Liu, Jiaqi Guo
Summary: This study aims to improve the performance of MnO2 in capacitive deionization by growing it on the surface of hollow carbon spheres (HCS). The results show that HCS with good sphericity and uniform size, excellent electrical conductivity and hydrophilicity effectively reduce the agglomeration of MnO2 and enhance the capacitive performance of the composites.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Xiaobao Zhang, Baiyi Shao, Aoping Guo, Zemin Sun, Junkai Zhao, Fangming Cui, Xiaojing Yang
Summary: The flexible MnO2/Ti3C2Tx hybrid film, with its unique porous structure, significantly improved the specific surface area, specific capacitance, and cycle stability compared to MnO2 nanoshells and porous Ti3C2Tx nanosheets.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
S. Sivakumar, L. Nelson Prabu
Summary: This experiment focuses on the influence of Co-doped α-MnO2 nanoparticles synthesized via co-precipitation technique. Various characterization techniques were used to examine the Co-doped α-MnO2 nanoparticles, and electrochemical analysis was conducted to evaluate their capacitance properties.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Crystallography
Yu Liu, Yu Xu, Yingna Chang, Yuzhen Sun, Zhiyuan Zhao, Kefan Song, Jindi Wang, Feng Yu, Rong Xing
Summary: Composites of vertically grown MnO2 nanosheet arrays on the surface of VGCFs are fabricated through a low-temperature redox reaction. An assembled electrochemical capacitor with AC/0.5 M K2SO4/MnO2@VGCF exhibits higher specific capacitance and better rate capability at fast-current density compared to the standalone MnO2 capacitor prepared by hydrothermal method. Electrochemical tests reveal that VGCFs act as a conducting matrix, effectively improving the conductivity of MnO2 nanosheets during cycling.
Article
Chemistry, Physical
Indu Kaushal, Vinit Kumar, Priya Saharan, Alok Mittal, Ram Bhagat, Surender Kumar, Ashok K. Sharma
Summary: A hydrothermal methodology followed by calcinations was employed to prepare a CeO2-MnO2/CNF composite with superior electrochemical energy storage and sensing performance. The composite exhibited efficient hybrid sensing and electrode properties due to the growth of agglomerated CeO2 clusters with needle-shaped MnO2 decorated on the CNF surface. The surface structure and chemical features of the nanocomposite were characterized, and the XRD analysis confirmed the crystalline phase of CeO2-MnO2 on CNF. The synthesized composite showed specific capacitance, capacitive retention, energy density, and power density values, indicating its potential as an electrode material. Furthermore, the composite displayed good sensitivity and low detection limit when tested as a sensing material for H2O2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Textiles
R. M. Attia, N. M. Yousif, R. H. Helal, N. M. Ali
Summary: This study utilized cotton fabric as electronic textile by incorporating nano MnO2 and polyaniline as conductive materials. The fabric was treated through two consecutive steps, including the application of different concentrations of MnO2 onto the fabric samples and subsequent chemical oxidative polymerization of aniline over the fabric. The resulting modified cotton fabric showed significantly enhanced electrical conductivity, especially after gamma irradiation treatment.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Chemistry, Physical
Xiaoyan Li, Xiaoping Lin, Na Yang, Xianghong Li, Wei Zhang, Sridhar Komarneni
Summary: Aqueous gel supercapacitors have attracted widespread attention as an important component of flexible energy storage devices due to their fast charging/discharging rates, long cycle life, and high electrochemical stability under mechanical deformation. However, the low energy density of these supercapacitors has hindered their further development. To address this issue, metal cation-doped MnO2/carbon cloth-based flexible electrodes were prepared, and their morphological, structural, and electrochemical properties were explored. The optimized electrode showed a specific capacitance of 327.55 F/g and a pseudo-capacitance ratio of 35.56%. The assembled flexible symmetric supercapacitors demonstrated desirable electrochemical performances, with an energy density of 26.8 Wh/kg at a power density of 300 W/kg. Even at a power density of 1150 W/kg, the energy density could still reach 19.1 Wh/kg. These high-performance energy storage devices hold great potential for portable and wearable electronic applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Shiju Yang, Libing Qian, Yunjie Ping, Haoliang Zhang, Jingjing Li, Bangyun Xiong, Pengfei Fang, Chunqing He
Summary: This study investigated the impact of vacancy defects on the physical-chemical properties of Bi2O3 powders used as supercapacitor electrodes. It was found that the h-Bi2O3 sample with more V'''BiVO++V'''(Bi) defects exhibited better cycle stability and rate performance, attributed to the insertion/extraction process of K+ ions in the surface defects. Furthermore, the high concentration of V'''BiVO++V'''(Bi) defects in the h-Bi2O3 electrode led to improved conductivity and higher specific energy density in an asymmetric supercapacitor configuration.
CERAMICS INTERNATIONAL
(2021)
Article
Energy & Fuels
Manpreet Kaur, Prakash Chand, Hardeep Anand
Summary: The present study demonstrates a binder-free electrodeposition technique to produce NiCo(2)O(4) electrodes, which exhibit high specific capacitance and good cycle stability. The results open up new possibilities for the practical application of NiCo2O4 as an energy storage material.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Environmental Sciences
Aziz Aynaou, Boubaker Youbi, Youssef Lghazi, Mohammed Ait Himi, Chaimaa El Haimer, Jihane Bahar, Ahmed Sahlaoui, Itto Bimaghra
Summary: In this study, polyaniline films were fabricated on ITO substrates using different electrolytes. The effect of the counter ion on the electrochemical energy storage performances of polyaniline in supercapacitors was investigated. The specific capacitance was found to have a clear dependence on the counter ion.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Chia-Sheng Liu, Cheng-Liang Huang, Hsing-Chih Fang, Kuo-Yung Hung, Chien-An Su, Yuan-Yao Li
Summary: The study utilized coaxial fiber cables to achieve high specific capacitance in aqueous solution, high energy density, and power density within a linear working range. The binder-free, conductive-medium-free cable mat is foldable and suitable for use in flexible SC devices.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Nitin. T. Shelke, M. A. Yewale, R. A. Kadam, U. T. Nakate, A. A. Jadhavar, D. K. Shin
Summary: In this study, flower-like nickel cobalt oxide (NiCo2O4) electrode material was prepared by a facile hydrothermal method and its properties were characterized. The obtained results showed that the electrode material exhibited high areal capacity and energy density, surpassing some carbon-based materials.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)