Article
Engineering, Environmental
Jianfeng Xu, Shu Dong, Pan Li, Wenhao Li, Feng Tian, Junran Wang, Qingqing Cheng, Zhouying Yue, Hui Yang
Summary: The development of a novel ether-free amphoteric ionic exchange membrane with long alkyl chains and zwitterionic groups shows high stability, low swelling ratio, and excellent proton conductivity. Compared to Nafion212 membrane, the optimized TA15-SPBP membrane exhibits higher ion selectivity and better electrical efficiencies.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Jicui Dai, Kaipei Wang, Xiaoyu Han, Jiaxin Yan, Xiangguo Teng
Summary: Amphoteric PSF-g-NaPSS/PVP blended ion exchange membranes were prepared and the membrane with a mass ratio of 3:7 showed the highest ion selectivity and superior performance compared to Nafion 115.
Article
Engineering, Chemical
Bo Pang, Xuemei Wu, Yusong Guo, Min Yang, Ruohan Du, Wanting Chen, Xiaoming Yan, Fujun Cui, Gaohong He
Summary: A novel hydroxyl bromopropane anionic precursor side chain is proposed to incorporate cations into the ionic conductive channels for selectively repelling vanadium ions. Compared with Nafion 212 membrane, the obtained ampho-teric membrane exhibits much lower vanadium ion permeability (1.9 x 10(-9) cm(2)s(-1)) and slightly lower area resistance (0.25 Omega cm(2)). Excellent performance of vanadium redox flow battery (coulombic efficiency, 99.2%, energy efficiency, 85.9% at 100 mA cm(-2) and 0.31% discharge decay rate) is achieved, surpassing most reported amphoteric ion conductive and Nafion 212 membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Electrochemistry
Alexandros Pasadakis-Kavounis, Funda Arslan, Mads Radmer Almind, David Aili, Johan Hjelm
Summary: In this study, a series of polybenzimidazole-polyvinylchloride polymer blends decorated with different quaternary ammonium groups were investigated. The blend with 90% polybenzimidazole content and decorated with DABCO showed superior performance, including low polarization resistance, low swelling, and high stability in acidic media. This suggests that quaternary ammonium functionalized polybenzimidazole-polyvinylchloride systems are excellent candidates for modification or fabrication of thinner membranes to reduce membrane resistance without compromising vanadium blocking properties.
BATTERIES & SUPERCAPS
(2023)
Article
Engineering, Chemical
Yuning Chen, Shouhai Zhang, Qian Liu, Xigao Jian
Summary: A novel amphoteric ion exchange membrane Q/S-M was proposed for VRB applications, showing higher water content and ion diffusion rate compared to conventional membranes, with superior chemical stability and durability. The membrane demonstrated advantages in both performance and longevity.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Analytical
Fan Yang, Yu Dai, Yu Zhang, Wei Wei, Shicheng Xu, Ronghuan He
Summary: A novel blended polymer membrane is prepared for vanadium redox flow batteries (VRFBs) as the diaphragm, which possesses superior affinity to sulfuric acid due to acid-base interactions. The membrane exhibits high oxidation stability and low vanadium permeability. The VRFB assembled with this membrane shows energy efficiency above 82% at a current density range of 20 to 120 mA cm-2 and stable performance after 50 charge-discharge cycles.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Y. Lei, B. W. Zhang, B. F. Bai, X. Chen, T. S. Zhao
Summary: The study introduces a transient model of VRFB with a bipolar membrane, which improves the Poisson equation to describe the Donnan effect between the two layers for a full description of charge and ion transport. Numerical results demonstrate that bipolar membranes with thin anion exchange layers exhibit higher energy efficiency at large current densities.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Chemical
Penghua Qian, Haixia Wang, Lei Zhang, Yong Zhou, Haifeng Shi
Summary: Sulfonated poly(ether ether ketone) (SPEEK) based composite membranes with sulfonated poly(aryl ether sulfone) (SPAES) exhibit enhanced proton transport channel and ion selectivity, resulting in higher coulombic and energy efficiencies for vanadium redox flow batteries.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Anuj K. Singh, Prerana Sharma, Khushboo Singh, Vinod K. Shahi
Summary: The study synthesizes cross-linked aliphatic polymer with side chain grafted imidazole based anion exchange membranes (AEMs) and obtains AEMs with excellent stability and high conductivity. These AEMs show low swelling ratio despite the high molality of exchangeable functional groups and exhibit blocking property for VO2+.
JOURNAL OF POWER SOURCES
(2022)
Article
Nanoscience & Nanotechnology
Wenpin Wang, Min Xu, Shubo Wang, Xiaofeng Xie, Yafei Lv, Vijay Ramani
Summary: A series of cross-linked fluorinated poly(aryl ether oxadiazole) membranes derivatized with imidazolium groups were prepared using poly(N-vinylimidazole) (PVI) as the bifunctional cross-linking agent. The resulting membrane showed high ion exchange capacity, low vanadium permeability, and good dimensional stability. It also exhibited high chemical stability in acidic and oxidizing environments, and demonstrated superior electrochemical performance in vanadium redox flow battery testing.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Maedeh Pahlevaninezhad, Elizabeth Esther Miller, Lixin Yang, Lauren Sarah Prophet, Ashutosh Singh, Thomas Storwick, Majid Pahlevani, Michael A. Pope, Edward P. L. Roberts
Summary: The use of ultrathin graphene coating on Nafion membranes significantly improves the performance of vanadium redox flow batteries, leading to higher energy efficiency (increased by 13%), power density (by 67%), and discharge capacity (by 17.5%) over 100 cycles.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Polymer Science
Gang Wang, Miaomiao Zhang, Zhenhua He, Jie Zhang, Jinwei Chen, Ruilin Wang, Aijun Teng, Yu Dai
Summary: A novel amphoteric ion exchange membrane composed of SPEEK and APP was developed for VRFB, showing excellent proton conductivity and low vanadium ion permeability, with higher selectivity and stability compared to Nafion115 and SPEEK membranes. The designed membrane demonstrated higher coulombic efficiency, comparable voltage efficiency, and higher energy efficiency, as well as good durability, making it a promising separator for VRFB.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Hyebin Kim, Jung S. Yi, Doohwan Lee
Summary: The study investigates the marked electrocatalytic effects of two-step B and O atomic doping of graphite-felt electrodes for vanadium redox reactions in a vanadium redox flow battery. By controlling the doping sequence and temperature via thermochemical reactions, the kinetic significance of the B and O surface centers for the reactions is identified, leading to improved catalytic activity and specific charge-discharge capacity of the electrodes. With a two-step O and B doping configuration, the B/O-GF electrode shows significantly higher voltage efficiency compared to pristine-GF, demonstrating the potential for enhanced performance in VRFB applications.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Sheeraz Mehboob, Ju-Young Lee, Jee Hun Ahn, Saleem Abbas, Xuan Huy Do, Jaewon Kim, Hyun-Jin Shin, Dirk Henkensmeier, Heung Yong Ha
Summary: In this study, multi-layered PANI-Nafion composite membranes with low vanadium ion permeability were successfully fabricated, which greatly improved the performance of VRFBs and preserved electric capacity almost perfectly. The fabricated membrane showed a high coulombic efficiency of 99% and an energy efficiency of 91% at 50 mA cm-2, outperforming the pristine Nafion 115 membrane. Moreover, it exhibited remarkable durability and capacity retention with a 100% discharge capacity retention over 100 cycles of charge/discharge operation.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Jiaye Ye, Du Yuan, Mei Ding, Yong Long, Ting Long, Lidong Sun, Chuankun Jia
Summary: The Nafion/lignin composite membrane shows excellent performance in VRFB, with high conductivity, low vanadium ions permeability, and outstanding cycling stability. Compared to commercial counterparts, it exhibits higher Coulombic efficiency and energy efficiency.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Applied
Maoyi Yi, Jie Li, Mengran Wang, Xinming Fan, Bo Hong, Zhian Zhang, Aonan Wang, Yanqing Lai
Summary: In this study, polyacrylic acid (PAA) was used as a binder for the cathode in all-solid-state batteries. Through H+/Li+ exchange reaction, a uniform PAA-Li coating layer was formed on the cathode surface, improving the stability of the cathodic interface and the crystal structure. The SC-NCM83-PAA cathode exhibited superior cycling performance compared to traditional PVDF binder.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Yonghan Zhou, Zhongfeng Ji, Wenrui Cai, Xuewei He, Ruiying Bao, Xuewei Fu, Wei Yang, Yu Wang
Summary: By learning from the pencil-writing process, a solid-ink rubbing technology (SIR-tech) has been invented to develop durable metallic coatings on diverse substrates. The composite metallic skin by SIR-tech outperforms pure liquid-metal coating and shows great potential for various applications.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Ruiqi Tian, Hehe Zhang, Zeyu Yuan, Yuehua Man, Jianlu Sun, Jianchun Bao, Ming-Sheng Wang, Xiaosi Zhou
Summary: In this study, polypyrrole-encapsulated Sb2WO6 microflowers were synthesized and demonstrated to exhibit excellent potassium storage properties and cycling stability. The improved performance of Sb2WO6@PPy was attributed to the unique microflower structure, enhanced electronic conductivity, and protective PPy coating.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Review
Chemistry, Applied
Longxing Wu, Zhiqiang Lyu, Zebo Huang, Chao Zhang, Changyin Wei
Summary: This paper presents a comprehensive survey on physics-based state of charge (SOC) algorithms applied in advanced battery management system (BMS). It discusses the research progresses of physical SOC estimation methods for lithium-ion batteries and presents future perspectives for this field.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Honggang Huang, Yao Chen, Hui Fu, Cun Chen, Hanjun Li, Zhe Zhang, Feili Lai, Shuxing Bai, Nan Zhang, Tianxi Liu
Summary: The d-d orbital coupling induced by crystal-phase engineering effectively adjusts the electronic structure of electrocatalysts, improving their activity and stability, which is significant for electrocatalyst research.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Quanzhen Sun, Yifan Li, Caixia Zhang, Shunli Du, Weihao Xie, Jionghua Wu, Qiao Zheng, Hui Deng, Shuying Cheng
Summary: In this study, indium (In) ions were introduced into flexible Cu2ZnSn(S,Se)(4) (CZTSSe) solar cells to modify the back interface and passivate deep level defects in CZTSSe bulk. The results showed that In doping effectively inhibited the formation of secondary phase and V-Sn defects, decreased the barrier height at the back interface, passivated deep level defects in CZTSSe bulk, increased carrier concentration, and significantly reduced the V-OC deficit. Eventually, a flexible CZTSSe solar cell with a power conversion efficiency of 10.01% was achieved. This synergistic strategy of interface modification and bulk defects passivation through In incorporation provides a new approach for fabricating efficient flexible kesterite-based solar cells.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Negah Hashemi, Jafar Hussain Shah, Cejun Hu, Subhajit Nandy, Pavlo Aleshkevych, Sumbal Farid, Keun Hwa Chae, Wei Xie, Taifeng Liu, Junhu Wang, Mohammad Mahdi Najafpour
Summary: This study investigates the effects of Fe on the oxygen-evolution reaction (OER) in the presence of Au. The study identifies two distinct areas of OER associated with Fe and Au sites at different overpotentials. Various factors were varied to observe the behaviors of FeOxHy/Au during OER. The study reveals strong electronic interaction between Fe and Au, and proposes a lattice OER mechanism based on FeOxHy.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Yingshi Su, Yonghui Cheng, Zhen Li, Yanjia Cui, Caili Yang, Ziyi Zhong, Yibing Song, Gongwei Wang, Lin Zhuang
Summary: This study systematically investigates the key roles of Nafion on Cu nanoparticles electrocatalyst for CO2RR. The Nafion modifier suppresses the hydrogen evolution reaction, increases CO2 concentration and mass transfer process, and activates CO2 molecule to enhance C2 product generation. As a result, the selectivity of the hydrogen evolution reaction is reduced and the efficiency of C2 products is significantly improved.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Daijie Deng, Honghui Zhang, Jianchun Wu, Xing Tang, Min Ling, Sihua Dong, Li Xu, Henan Li, Huaming Li
Summary: By doping sulfur into vanadium nitride, the S-VN/Co/NS-MC catalyst exhibits enhanced oxygen reduction reaction activity and catalytic performance. When applied in liquid and flexible ZABs, it shows higher power density, specific capacity, and cycling stability.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Review
Chemistry, Applied
Yi Li, Fei Zhang
Summary: Self-assembly of metal halide perovskite nanocrystals holds significant application value in the fields of display, detector, and solar cell due to their unique collective properties. This review covers the driving forces, commonly used methods, and different self-assembly structures of perovskite nanocrystals. Additionally, it summarizes the collective optoelectronic properties and application areas of perovskite superlattice structures, and presents an outlook on potential issues and future challenges in the development of perovskite nanocrystals.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Anki Reddy Mule, Bhimanaboina Ramulu, Shaik Junied Arbaz, Anand Kurakula, Jae Su Yu
Summary: Direct growth of redox-active noble metals and rational design of multifunctional electrochemical active materials play crucial roles in developing novel electrode materials for energy storage devices. In this regard, silver (Ag) has attracted great attention in the design of efficient electrodes. The construction of multifaceted heterostructure cobalt-iron hydroxide (CFOH) nanowires (NWs)@nickel cobalt manganese hydroxides and/or hydrate (NCMOH) nanosheets (NSs) on the Ag-deposited nickel foam and carbon cloth (i.e., Ag/ NF and Ag/CC) substrates is reported. The as-fabricated Ag@CFOH@NCMOH/NF electrode delivered superior areal capacity value of 2081.9 μA h cm-2 at 5 mA cm-2. Moreover, as-assembled hybrid cell based on NF (HC/NF) device exhibited remarkable areal capacity value of 1.82 mA h cm-2 at 5 mA cm-2 with excellent rate capability of 74.77% even at 70 mA cm-2. Furthermore, HC/NF device achieved maximum energy and power densities of 1.39 mW h cm-2 and 42.35 mW cm-2, respectively. To verify practical applicability, both devices were also tested to serve as a self-charging station for various portable electronic devices.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Zanling Huang, Shuqi Zhu, Yuan Duan, Chaoran Pi, Xuming Zhang, Abebe Reda Woldu, Jing-Xin Jian, Paul K. Chu, Qing-Xiao Tong, Liangsheng Hu, Xiangdong Yao
Summary: In this study, it was found that Ni sites act as a host to attract Fe(III) to form Fe(Ni)(III) binary centers, which promote the oxygen evolution reaction (OER) activity and stability by cyclical formation of intermediates. Additionally, other ions can also catalyze the OER process on different electrodes.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Jie Zeng, Jian Bao, Ya Zhang, Xun-Lu Li, Cui Ma, Rui-Jie Luo, Chong-Yu Du, Xuan Xu, Zhe Mei, Zhe Qian, Yong-Ning Zhou
Summary: The balance between cationic redox and oxygen redox is crucial for achieving high energy density and cycle stability in sodium batteries. This study demonstrates the reversible Mn2+/Mn4+ redox in a P3-Na0.65Li0.2Co0.05Mn0.75O2 cathode material through Co substitution, effectively suppressing the contribution of oxygen redox and improving structure stability.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Daniela M. Josepetti, Bianca P. Sousa, Simone A. J. Rodrigues, Renato G. Freitas, Gustavo Doubek
Summary: Lithium-oxygen batteries have high energy density potential but face challenges in achieving high cyclability. This study used operando Raman experiments and electrochemical impedance spectroscopy to evaluate the initial discharge processes in porous carbon electrodes. The results indicate that the reaction occurs at the Li2O2 surface and the growth of Li2O2 forms a more compact and homogeneous structure.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Ziqi Zhang, Jinyun Xu, Yu Zhang, Liping Zhao, Ming Li, Guoqiang Zhong, Di Zhao, Minjing Li, Xudong Hu, Wenju Zhu, Chunming Zheng, Xiaohong Sun
Summary: This paper explores the challenge of increasing global CO2 emissions and highlights the role of porous metal oxide materials in electrocatalytic reduction of CO2 (CO2RR). Porous metal oxides offer high surface area and tunability for optimizing CO2RR reaction mechanisms.
JOURNAL OF ENERGY CHEMISTRY
(2024)