Article
Nanoscience & Nanotechnology
Changxin Lin, Hu Zhang, Xiangxin Zhang, Yongchuan Liu, Yining Zhang
Summary: MnO2@carbon composites (MnO2@IPHCSs) are prepared by growing MnO2 nanoflowers on an interconnected porous hollow carbon spheres (IPHCSs) template. IPHCSs significantly improve the conductivity of the MnO2 cathode and provide more ion diffusion paths. MnO2@IPHCSs show high specific capacity and excellent ion diffusion performance, as well as high cycling stability and reversibility due to their enhanced structure and increased conductivity. These properties make MnO2@IPHCSs promising candidates for high-performance ZIBs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Jiangtao Liu, Shaohui Zhang, Baosheng Liu, Xuning Feng, Zhenbo Wang
Summary: A supercapacitor electrode material with good hollow structure and uniform surface morphology was successfully synthesized by using hollow carbon spheres prepared via high temperature sintering of dopamine hydrochloride and subsequent coating with MnO2. The prepared material exhibited good specific capacitance and cycle stability, making it potentially useful for high-performance supercapacitors.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
MengXian Lin, Fuqiang Shao, Yu Tang, Hongjun Lin, Yanchao Xu, Yang Jiao, Jianrong Chen
Summary: By doping Co into MnO2 cathode material and forming oxygen vacancies, this study successfully enhances the cycling stability and electron diffusion rate of Zn/MnO2 battery, enabling superior performance at high current densities.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Electrochemistry
Boshuang Zhang, Jingjing Li, Bin Hu, Yiwen Wang, Xiaohong Shang, Pengfei Nie, Jianmao Yang, Jianyun Liu
Summary: In this study, ultrathin 8-MnO2 nanosheets were successfully embedded on electrospun porous carbon nanofibers (PCNF) to create flexible 8-MnO2@PCNFs electrodes. These electrodes exhibited high specific capacitance and ultrafast adsorption speed in capacitive deionization (CDI). The interconnected structure of 8-MnO2 nanosheets inserted in PCNF also provided excellent recycling stability in CDI devices.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Xunlong Zhang, Guilong Yan, Han Li, Zhenyu Li, Jingyu Chen, Li Wang, Yuanpeng Wu
Summary: Flexible electrode materials, such as carbon-based nanofiber, have gained significant attention for their flexibility, safety, and reliability. In this study, nitrogen-boron co-doped hollow porous carbon nanofiber (HPCNF) membranes were fabricated as flexible supercapacitor electrodes using a novel and simple method. The HPCNF exhibited a high specific surface area (413.98 m2/g) and the co-doping of N and B resulted in a high specific capacitance (200.2 F/g at 0.1 A/g). Even after 3000 cycles, the NB-HPCNF maintained a high capacitance retention (104.81%). This research provides a new approach for electrochemical energy storage, contributing to the development of portable flexible devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yanan Zhang, Jiangbo Wang, Mensah Alfred, Pengfei Lv, Bing Liu, Qufu Wei
Summary: In this study, a novel Co-Nx-enriched electrospun porous carbon nanofibrous bifunctional electrocatalyst was successfully prepared and demonstrated outstanding catalytic activity and stability in both oxygen reduction reaction and oxygen evolution reaction. Furthermore, flexible zinc-air batteries assembled with this catalyst exhibited excellent performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Engineering, Environmental
Jianhua Zhu, Qian Zhang, Lefan Guo, Yanjiao Zhao, Ruiyun Zhang, Lifang Liu, Jianyong Yu
Summary: This study designed and fabricated a structure consisting of flexible hollow hierarchical porous carbon nanofibers bridged by carbon nanotubes, decorated with polyaniline. The resulting composite material exhibited excellent flexibility and high specific capacitance, maintaining a high capacitance retention during charging-discharging cycles.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Shengnan Wang, Tianyu Li, Yanbin Yin, Nana Chang, Huamin Zhang, Xianfeng Li
Summary: The traditional ZHS is upgraded to ZHSB with higher energy density by using a multifunctional decoupled additive MEP.Br, which has the merits of uniform Zn deposition, reduced polarization, increased capacity and stable complexation reaction.
Article
Engineering, Environmental
Ting-Ting Lv, Guang-Xun Zhang, Sha-Sha Zheng, Xiao-Tian Guo, Ting-Ting Chen, Sheng-Yang Yang, Huan Pang
Summary: In this study, a hollow heterostructure Co3V2O8@MnO2 was successfully synthesized by a simple hydrothermal method and an in-situ growth strategy. This material, as a free-standing aqueous zinc-ion batteries cathode, exhibits high conductivity and a hollow structure that can prevent volume change. It also provides sufficient active sites for the electrolyte, resulting in a high discharge capacity and desirable rate performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yunpei Zhu, Yi Cui, Husam N. Alshareef
Summary: Aqueous Zn-based batteries are promising due to their low cost and high capacity, but existing designs use excess Zn which reduces energy density. A new anode-free design utilizing nanocarbon nucleation layer enables uniform Zn electrodeposition with high efficiency and stability across various current densities. This innovation opens up new possibilities for implementing Zn-based batteries in energy storage systems.
Article
Energy & Fuels
Xue Li, Zhongtai Lin, Yudi Wei, Wenlong Luo, Jianxu Ding, Tingxi Li, Yong Ma
Summary: Rational design and effective utilization of electrode materials can enhance the electrochemical performance of supercapacitors. In this study, MnO2 and CoNi layered double hydroxides (CoNi-LDHs) were sequentially deposited on a carbon cloth/MXene electrode to prepare a CC/MMCoNi electrode. The nanoarray structure of the electrode provides a large specific surface area and facilitates ion transfer and electron migration. The presence of MXene improves the conductivity of the electrode and provides more active sites for MnO2 attachment. CoNi-LDHs with a Co:Ni ratio of 1:2 shows the highest capacitance. An asymmetric supercapacitor assembled with the CC/MMCoNi positive electrode and activated carbon negative electrode exhibits excellent practical application ability and resistance to external forces.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Nanoscience & Nanotechnology
Hanfang Zhang, Yihe Zhang, Yanran Liu, Xiancheng Shi, Yingge Zhang, Liqi Bai, Qi Wang, Li Sun
Summary: This study presents a new VO-α-MnO2/CNPK/G composite material for improving the performance of α-MnO2 zinc-ion batteries. The introduction of VO improves the reversibility of Zn2+ adsorption/desorption, leading to better energy storage properties. The nanotube array structure of VO-α-MnO2/CNPK/G facilitates fast ion/electron transfer and stable microstructure.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Nadir Ali, Aijaz Ahmed Babar, Xianfeng Wang, Jianyong Yu, Bin Ding
Summary: A facile strategy to fabricate porous, hollow, and flexible carbon nanofibers (CNF) for enhanced CO2 adsorption is reported in this study. The optimized CNF exhibits exceptional CO2 capture performance and high gas selectivity.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Hanfang Zhang, Yihe Zhang, Yanran Liu, Xiancheng Shi, Yingge Zhang, Liqi Bai, Qi Wang, Li Sun
Summary: The oxygen-deficient alpha-MnO2 nanotube integrated with graphene and N, P codoped cross-linked porous carbon nanosheet composite (VO-alpha-MnO2/CNPK/G) has been prepared for advanced zinc-ion batteries (ZIBs) with improved rate performance and cycle life. The introduction of VO in MnO2 reduces the Gibbs free energy of Zn2+ adsorption, making the adsorption/desorption process more reversible. The as-made battery exhibits high capacity and energy density, attributed to VO, and the composite structure enhances ion/electron transfer and stability. The electrochemical performance of VO-alpha-MnO2 is greatly improved with the addition of G and CNPK, achieving high capacity, energy density, and long cycle life.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Electrochemistry
Weishan Tang, Junqian Bai, Pengcheng Zhou, Qihang He, Feng Xiao, Maojie Zhao, Peilin Yang, Lei Liao, Yuan Wang, Ping He, Bin Jia, Liang Bian
Summary: A honeycomb-like electrode with hierarchical structure has been synthesized using NiCo-LDH/PMB/CC composite electrode materials, which demonstrate high specific capacitance and rich active sites. The assembled BSHD shows excellent capacity retention even at high current density, and still maintains decent specific energy at high specific power.
ELECTROCHIMICA ACTA
(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)