Article
Chemistry, Physical
Huabo Huang, Cheng Li, Jian Luo, Juan Huang, Peng Yu, Liang Li, Chuanxi Xiong
Summary: MnO2 composites, specifically the PANI/MnO2 composite, demonstrate promising potential as electrode materials for supercapacitors due to their low cost, environmental friendliness, and high electrochemical activity. The PANI/MnO2 composite, synthesized using PANI hydrogel as a substrate, exhibits a hierarchically porous structure with a large specific surface area and enhanced electron/ion conduction. This composite delivers wide potential window and high specific capacitances, making it a suitable candidate for symmetric supercapacitors. The study presents a novel approach to construct PANI/MnO2 nanocomposites with optimized electrochemical behavior.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Energy & Fuels
Shuang Li, Li-Li Yu, Wei-ling Xu, Rong-bing Li, Jun-Jie Zhu, Jun Fan, Jing-Tai Zhao
Summary: Porous manganese dioxide nanoflowers were successfully prepared via a template-free method at room temperature, with a specific surface area exceeding 300 m(2) g(-1). The formation and particle sizes of the nanoflowers were found to be influenced by the nucleation concentration in the initial reaction. Additionally, samples with an average particle size of 60-80 nm, high specific surface areas, and pore volume exhibited the best electrochemical performance, with a high specific capacitance of 245 F g(-1) and excellent cycling stability.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Dazhi Zhang, Peng Yang, Yixin Zhang, Honglai Liu, Yunhui Xu, Jianjun Wu, Peipei Li
Summary: Coupling carbon materials and metal oxide has been proven effective in promoting the energy storage performance of supercapacitor electrode materials. In this study, a novel pompon-like activated carbon/manganese dioxide nanosheet composite was successfully prepared via a facile and cost-efficient strategy. The as-prepared composite exhibited excellent electrochemical performance and showed great potential for practical applications in supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Wenrui Yao, Dingyuan Zheng, Zehuai Li, Yuning Wang, Haiyan Tan, Yanhua Zhang
Summary: A monolithic electrode (CW/MXene) with a dual utilization strategy was proposed, combining the hierarchical porous structure of carbonized wood (CW) and the high electrical conductivity as well as wettability of MXene. This electrode showed impressive electrochemical performance and provided advanced utilization for ultra-thick carbonized wood electrode applications in supercapacitors.
APPLIED SURFACE SCIENCE
(2023)
Article
Polymer Science
Juan Huang, Kejia Wu, Hui Bai, Huabo Huang, Xiaoqing Zhang, Yanbo Liu, Chuanxi Xiong
Summary: The study constructed PANI/MnO2 composite material by adding manganese sulfate, which showed higher specific capacitance than bare PANI and demonstrated superior charge transfer behavior. In kinetic analysis, both capacitive and diffusion-controlled behaviors were found to contribute to the electrochemical performance.
Article
Chemistry, Physical
Hanxue Zhao, Kaishuai Yang, Kailan Zhu, Mai Li, Wendong Xu, Waqar ul Hasan, Jiale Wang, Qinglin Deng, Jun Yu, Zhongyi Sun, Paul K. Chu
Summary: In this study, the surface activity of the electrode is enhanced by combining gold particles and MOF-derived CPCN with α-MnO2. The Au-MnO2/CPCN@CC electrode exhibits higher specific capacity and better cycling stability in 1 M Na2SO4. The use of Au nanoparticles and CPCN improves the surface electron transport of MnO2, resulting in superior performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Lin Shan, Yu Zhang, Ying Xu, Minjie Gao, Ting Xu, Chuanling Si
Summary: In this study, a supercapacitor electrode with high-rate performance was successfully constructed using readily available cedar branches through carbonization and activation. The carbonization temperature and process were optimized, resulting in a high specific capacitance and good rate capability. After compounding with MnO2, the composite electrode exhibited even higher specific capacitance. The assembled symmetric supercapacitor showed a high energy density, offering an idea for developing clean and efficient new energy technologies with high-rate performance.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Physical
Zhihu Pan, Xiang Li, Chenghao Yang, Xiaohong Ji
Summary: A facile co-thermal decomposition strategy is presented to engineer a hierarchical 3D porous Ti3C2Tx/MoS2 heterostructure for improved energy storage performance. The heterostructure exhibits fast electron and ion transportation, fast redox reaction kinetics, and long cycle stability due to the interconnected porous channels and exposed electroactive S-Mo-S edges. It achieves high specific capacitance, ultrahigh power energy, and high energy density, making it a potential electrode for next-generation supercapacitors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Weili Teng, Qinqin Zhou, Guanlin Lv, Peng Hu, Yucheng Du, Hongyi Li, Yuxiang Hu, Wenxin Liu, Jinshu Wang
Summary: A ternary PEDOT:PSS/rGO/PPy fiber electrode was constructed by chemical polymerization of pyrrole on a PG hybrid hydrogel fiber. The electrode shows high specific capacitance, fast charge/discharge rate, and long-term cycling stability, making it suitable for energy storage in wearable electronics.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Electrochemistry
Shaoyun Chen, Yuanfang Zhang, Du Tian, Qingliang You, Min Zhong, Chenglong Hu, Jian Chen
Summary: The binder-free supercapacitors were fabricated by constructing flexible electrodes using polyaniline (PANI)@MnO2@flexible carbon nanofibers (CNFs) composite. The specific capaci-tance of single PANI@MnO2@CNFs electrode was 654 F/g at the scan rate of 10 mV/s in Na2SO4 electrolyte, with a capacitance retention of about 88.8% after 1000 cycles. The as-prepared symmetric super-capacitor exhibited a maximum energy density of 27.9 Wh/kg at the power density of 400 W/kg, surpassing or comparable to previous PANI-based supercapacitors.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Seung Hwa Park, Hong Jun Park, Seon Gyu Son, Dong Seok Kim, Seo Jin Kim, Hoyoung Suh, Junho Shin, Taegong Ryu, Jae-Min Jeong, Bong Gill Choi
Summary: This study developed high-performance 3D MnO2/HRGO electrodes with outstanding specific areal and volumetric capacitances, impressive rate capability, and energy densities, showcasing excellent performance in supercapacitors with electrode thicknesses greater than 100 pm.
Article
Materials Science, Paper & Wood
Jincy Parayangattil Jyothibasu, Ruei-Hong Wang, Kenneth Ong, Juping Hillary Lin Ong, Rong-Ho Lee
Summary: Nanostructured manganese dioxide (MnO2) was homogeneously deposited on a regenerated cellulose/functionalized CNT (f-CNT) matrix through a direct redox reaction between potassium permanganate and carbon nanotubes (CNTs) in an acidic medium. The resulting cellulose/f-CNT/MnO2 composite films showed outstanding electrochemical performance as freestanding electrodes for supercapacitors, with a maximal areal capacitance of 7956 mF cm(-2) achieved for a high MnO2 content composite. The symmetric supercapacitor assembled using the cellulose/f-CNT/MnO2 composite film exhibited high capacitance, energy density, and power density. The simple and environmentally friendly synthetic procedure can be readily scaled up for bulk synthesis.
Article
Energy & Fuels
Erman Taer, Apriwandi, Windasari, Rika Taslim, Mohamad Deraman
Summary: Biomass-based activated carbon with 2D nano-structure, 3D hierarchical porous, and self-/co-doping active heteroatoms has been proven to be an excellent sustainable electrode material for high-energy supercapacitors. This study aimed to obtain activated carbon with these features from Indonesian laurel aromatic evergreen biomass and optimize its structure through high-temperature pyrolysis. The prepared ILAE carbon material exhibited a 2D gauze-like nanosheet structure and a hierarchical pore network, leading to excellent electrochemical performance in symmetrical supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Xuelin Li, Jianfeng Zhu, Wenyu Liang, Igor Zhitomirsky
Summary: The study presents a simple and direct method to design and fabricate Ti3C2Tx-CNT composite electrodes; the optimized electrodes exhibit higher capacitance than literature results in Na2SO4 electrolyte, laying the foundation for the fabrication of asymmetric aqueous devices operating at 1.6 V.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Energy & Fuels
Jing Ran, Yafei Liu, Tiantian Yang, Huixia Feng, Huiying Zhan, Haixiong Shi
Summary: The MnO2@MoS2/RGO composite electrode material is prepared by using MoS2/RGO as the conductive substrate and MnO2 as the active substance particles. The composite electrode has excellent specific capacitance and stable cyclic stability, which can meet the demand for new energy. With a cycle stability of 88.5% after 5000 cycles, it has become a hot topic in the research of materials for supercapacitor electrodes.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Organic
Deping Wang, Yanwen Zheng, Min Yang, Fuxing Zhang, Fangfang Mao, Jiangxi Yu, Xiaohong Xia
ORGANIC & BIOMOLECULAR CHEMISTRY
(2017)
Article
Chemistry, Physical
Zhiqiang Gu, Xiaohong Xia, Chan Liu, Xi Hu, Yuxi Chen, Zhiyong Wang, Hongbo Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Electrochemistry
Xuefang Zhang, Deping Wang, Min Yang, Xiaohong Xia, Hui Chen, Yuxi Chen, Hongbo Liu
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2018)
Article
Chemistry, Physical
Zhiciiang Gu, Chan Liu, Runyu Fan, Zan Zhou, Yuxi Chen, Yuede He, Xiaohong Xia, Zhiyong Wang, Hongbo Liu
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Chemistry, Physical
Qian Ma, Wenming Hu, Dachun Peng, Ruohan Shen, Xiaohong Xia, Hui Chen, Yuxi Chen, Hongbo Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Physical
Deping Wang, Wenming Hu, Qian Ma, Xuefang Zhang, Xiaohong Xia, Hui Chen, Hongbo Liu
Article
Chemistry, Applied
Deping Wang, Min Yang, Yongqiang He, Junqiang Liu, Qian Ma, Xiaohong Xia, Hongbo Liu
JOURNAL OF POROUS MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Wufeng Fan, Junpeng Xue, Deping Wang, Yuxi Chen, Hongbo Liu, Xiaohong Xia
Summary: By designing an integrated electrode with a sandwich structure, the Sn4P3@MXene nanocomposites exhibit high reversible capacity and outstanding rate performance, while the conductive and elastomeric MXene layers contribute to accommodating the volume change of Sn4P3.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Electrochemistry
Deping Wang, Yongqiang He, Hongbo Liu, Xiaohong Xia
Summary: Potassium-ion hybrid capacitors (PIHCs) are potential devices for large-scale energy storage. Researchers have fabricated hollow carbon nanospheres with tunable shell size, which demonstrate high capacity and long-term stability for potassium-ion storage.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Zechao Ma, Yinxv Gao, Chenguang Bao, Xiaohong Xia, Hongbo Liu
Summary: Carbon materials, including microcrystalline graphite, have been extensively studied as anode materials for Potassium-ion batteries. Microcrystalline graphite exhibits high energy density, good stability, and low cost. It has a high reversible capacity of 249 mAh g-1 and good cycle stability in PIBs, making it a promising candidate for commercialization.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Wufeng Fan, Yingxv Gao, Qunbo Hui, Zechao Ma, He Gan, Xiaohong Xia, Hongbo Liu
Summary: A closed-ended hybrid of MXene and Sn4P3, consisting of active Sn4P3 hollow nanospheres armored by a conductive MXene shell, is proposed. The MXene shell protects Sn4P3 from direct exposure to the electrolyte and allows inward expansion, leading to the formation of a stable solid-electrolyte interphase layer. The hybrid system exhibits a high capacity of 302.1 mAh g-1 even at a high rate of 10 A g-1 and can cycle for 1500 cycles with a capacity retention of 94.9%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Wufeng Fan, Yingxv Gao, Hongbo Liu, Xiaohong Xia
Summary: This study transformed 2D MXene into a 3D conductive network by incorporating Sn and Sn4P3 nanoparticles between the MXene sheets. The distribution of ultrasmall Sn nanoparticles ensures a highly conductive network along and perpendicular to the MXene planes, while the covalent-bonded Sn4P3 nanoparticles reinforce the structural stability. In situ and ex situ characterizations reveal a highly reversible Na+ insertion/extraction process in the network. The 3D conductive network exhibits enhanced capacity, long-term cycling stability (127.2 mAh g(-1) after 1000 cycles at 5 A g(-1)), and superior pseudocapacitive properties due to the rational design.
JOURNAL OF POWER SOURCES
(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)