Article
Chemistry, Physical
Kun Zheng, Leiping Liao, Yu Zhang, Hua Tan, Jingquan Liu, Chenwei Li, Dedong Jia
Summary: A unique hierarchical core/shell homostructure of LDH material with high capacitance, good rate performance, and cyclic stability has been constructed through in-situ growth and conversion process. The designed supercapacitor also exhibits high energy density.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Abdul Rehman Akbar, Gangqiang Peng, Yongyi Li, Rashid Iqbal, Adil Saleem, Guohong Wang, Abdul Sammed Khan, Mumtaz Ali, Muhammad Tahir, Mohammed A. Assiri, Ghaffar Ali, Fude Liu
Summary: The fabrication of low-cost, effective, and highly integrated nanostructured materials for high-energy-density supercapacitors is highly desired. In this study, an activated carbon cloth (ACC) is designed as the functional scaffold for supercapacitors and modified with various nanomaterials. The resulting structured core-shell heterostructure ACC@NiCo@NiOOH@CoMoO4 electrode exhibits exceptional specific areal capacitance and cycling stability. Moreover, this electrode is developed into an asymmetric supercapacitor, demonstrating excellent areal capacitance, energy density, and power density with a high cycling life.
Article
Chemistry, Inorganic & Nuclear
Hao Chen, Jiangning Li, Linli Chen, Guochang Li, Wenna Zhao, Kai Tao, Lei Han
Summary: This research focuses on the development of core-shell heterostructure electrocatalysts for water splitting. Among the three developed electrocatalysts, NiCo@NiFe-LDH150/NF exhibits the best activity and stability. The research also demonstrates the efficient and stable performance of an alkaline electrolytic cell using NiCo@NiFe-LDH150/NF as both the cathode and anode.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
B. Q. Wang, S. H. Gong, X. C. Wang, J. F. Wu, F. Liu, J. P. Cheng
Summary: In this study, a series of NiCoO2@NiCo/CNT ternary composites were synthesized using the thermal reducibility of trisodium citrate and its hydrolyzate. By optimizing the conductivity and stability, the composite exhibited extremely high specific capacitance, excellent rate performance, and stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Energy & Fuels
Shuai Wang, Cunhai Hu, Jiaheng Wang, Mingzhen Xie, Songyuan Wu, Linheng Zhao, Jiaxu Gong, Yatang Dai
Summary: Reasonable structural design is widely used to improve the performance of electrode materials. In this study, a coreshell structure with a unique appearance was designed, which showed high cycle stability and excellent capacity. DFT calculations revealed that the electronic structure at the heterogenous interface changed after compounding, leading to enhanced electron transfer and reaction rate.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Analytical
Wenda Wang, Zhenting Zhao, Qian Lei, Hongyan Xu, Jie Hu, Lin Chen
Summary: A novel gold nanoparticles functionalized hierarchical layered NiCo2O4 nanosheets/NiCo2O4 nanowires core-shell structure is proposed for hydrazine detection. The as-prepared sensor exhibits high sensitivity, good linear range and low detection limit after optimization of experimental parameters.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Ming Yuan, Zhiyuan He, Liwen Tan, Zhangyu Liao, Yujun Liu, Yi Zhang, Xiaoli Xiong
Summary: A novel and sensitive non-enzymatic glucose sensor was developed in this study by constructing a hierarchical core-shell nanostructure. The sensor showed good detection performance and repeatable responses.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Mengdi Wang, Xingyu Liu, Xiang Wu
Summary: It is crucial to design catalysts with unique spatial structures and excellent electrochemical performance. Although non-noble metal catalysts are less active than Pt-based ones, their catalytic ability can be enhanced by the synergistic effect of different components. In this study, several dendritic-like CoP@NiCo-LDH hetero-catalysts were synthesized using a multi-step growth route. The CoP@NiCo LDH-100 samples exhibited superior performance in OER and HER compared to commercial IrO2 (OER) and Pt/C (HER) in alkaline electrolyte. Density functional theory (DFT) calculation showed that the composites had low adsorption energy and tunable charge redistribution at the interface. The enhanced conductivity of the catalyst was confirmed by an increased Fermi-level PDOS value. The upward shift of the D-band center facilitated the desorption of intermediates and accelerated the hydrolysis dissociation process, leading to improved HER activity and reduced overall electrolysis voltage.
Article
Chemistry, Physical
Fangqi Ye, Jiao-Jiao Zhou, Xinyue Jiang, Linping Wang, Yizhao Su, Bo Zhu, Luyang Chen
Summary: The epitaxially grown NiCo-LDH nanowrinkles on the surface of self-supported Co-MOF nanoneedles resulted in aligned nanopillar arrays through facile electrodeposition. The Co-MOF@NiCo-LDH composite exhibited extraordinary areal capacitance (44.1 F cm-2 at 5 mA cm-2), which was 7.6 and 2.6 times higher than that of bare NiCo-LDH and Co-MOF, respectively, due to the high porosity of Co-MOF, excellent redox activity of NiCo-LDH, and interfacial synergy of the core-shell multicomponent heterostructure. Furthermore, the asymmetric supercapacitor constructed with activated carbon demonstrated satisfactory energy density of 0.89 mWh cm-2 at a power density of 7.5 mW cm-2 and superior cycling stability (97.6% capacitance retention after 10,000 cycles).
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Fang Dong, Weigao Han, Weiliang Han, Zhicheng Tang
Summary: In this study, a core-shell SiO2@NiaCobOx nanotube was designed and synthesized for the efficient conversion of VOCs. The low-temperature catalytic combustion of toluene was achieved through the combined action of MvK and L-H mechanisms. The nanotube also exhibited good thermal stability and water resistance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Yang Cao, Ting Wang, Xue Li, Longcheng Zhang, Yonglan Luo, Fang Zhang, Abdullah M. Asiri, Jianming Hu, Qian Liu, Xuping Sun
Summary: In this study, a hierarchical CuO@NiCo layered double hydroxide core-shell nanoarray on copper foil (CuO@NiCo LDH/CF) was developed as a 3D OER electrocatalyst, showing superior catalytic activity with a high geometrical catalytic current density of 20 mA cm(-2) at an overpotential of 256 mV and strong long-term electrochemical durability for at least 24 hours.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Guan Wu, Ziyang Ma, Xingjiang Wu, Xiaolin Zhu, Zengming Man, Wangyang Lu, Jianhong Xu
Summary: This study demonstrates high-performance fibre-based electrochemical supercapacitors (FESCs) constructed using hetero-structured polymetallic oxides/porous graphene core-sheath fibres. The FESCs exhibit high areal capacitance and manageable Faradaic reversibility. Furthermore, the solid-state FESCs based on these fibres show high energy-density, long-life cycles, diverse-powered capabilities, and actual energy-supply applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Nanoscience & Nanotechnology
Zhao Zhuang, Wenjiao Wang, Yudi Wei, Tingxi Li, Mingliang Ma, Yong Ma
Summary: A hierarchical PANI/MnO2 core/shell nanostructure was successfully constructed through in situ polymerization, effectively increasing active surface areas and decreasing ion transmission distance. The nanostructure exhibited better electrochemical activity and higher capacitance performance compared to pure PANI nanorods and pure MnO2.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Electrochemistry
He Zhang, Tao Xiong, Rui Chen, Yanxi Wang, Cimei Fang, Longjun Xu, Chenglun Liu
Summary: MnCo2O4.5@NiCo layered double hydroxides (LDHs) were synthesized on nickel foam (NF) using hydrothermal-calcination-hydrothermal method, retaining the structures of MnCo2O4.5 nanoneedles and NiCo LDH nanosheets, resulting in improved electrochemical performance. The composite exhibited excellent specific capacity (1266 C g(-1) at 2 A g(-1) current density) and demonstrated outstanding initial capacity retention (96.8% at 20 A g(-1) current density). Furthermore, the self-assembled MnCo2O4.5@NiCo LDH/NF//AC (activated carbon) asymmetric supercapacitor (ASC) achieved the highest energy density of 33.3 W h kg(-1) at a power density of 798 W kg(-1) and maintained a long cycle life of 81% at 5 A g(-1) after 7000 cycles.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Dongmei Zhai, Jie Wen, Qianyao Ding, Yanyan Feng, Wen Yang
Summary: In this study, an electrode material composed of NiCo-LDH nanofibers and cobalt hydroxide nanosheets was constructed to enhance capacitance performance. The material exhibited excellent specific capacitance and cycling stability, demonstrating great potential for energy storage applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(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)