Article
Chemistry, Physical
Lin Wu, Shuxin Li, Lixiang Li, Han Zhang, Lin Tao, Xin Geng, Haiming Yang, Weimin Zhou, Chengguo Sun, Dongying Ju, Baigang An
Summary: In this study, vanadium-doped Co9S8 nanoparticles encapsulated in nitrogen-doped porous carbon nanoflowers were prepared and applied as a bifunctional catalyst for the cathode of a rechargeable zinc-air battery. The catalyst exhibited excellent electrochemical performance, outperforming noble metal catalysts and recent Co-based catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Electrochemistry
Chengsi Hu, Jun Chen, Yaqin Wang, Yan Huang, Shitao Wang
Summary: The development of high-efficiency, low-cost, and stable bifunctional catalysts is crucial for the large-scale application of zinc-air batteries. In this study, a telluride-doped porous carbon catalyst was synthesized and exhibited excellent electrocatalytic performance, providing a strategy to enhance the performance of zinc-air batteries.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Xiaobo He, Jiali Xu, Fengxiang Yin, Jiaqi Li, Ruilong Ma, Biaohua Chen
Summary: This study develops a simple method to prepare Co, N, O tri-decorated carbon nanotubes (CNTs) as highly efficient catalysts for oxygen reduction/evolution reactions and Zn-air batteries at a low temperature of 200 degrees C. The well-decorated Co, N, and O surface species introduce defects in the CNTs supports, which further tune the key features of their valence bands and determine their intrinsic catalytic activity. These decorated CNTs show optimized intrinsic activity and bifunctional activity, as well as excellent performance in solid-state Zn-air batteries. This work paves the way for efficient oxygen electrocatalysts and Zn-air batteries at relatively lower temperatures.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Shihong Chen, Haowen Ren, Yang Qiu, Chunhui Luo, Qiang Zhao, Wei Yang
Summary: In this study, a flower-like porous carbon material was designed to synthesize Co/Zn/Mn@NC, which showed excellent bifunctional catalytic activity with a half-wave potential of 0.86 V for oxygen reduction reaction (ORR) and an overpotential of 360 mV for oxygen evolution reaction (OER) at 10 mA/cm2. The Zn-Air battery (ZAB) with Co/Zn/Mn@NC-800 exhibited a higher power density of 163 mW/cm2 and a specific capacity of 832 mA h/gZn compared to Pt/C + RuO2. Moreover, the Co/Zn/Mn@NC-800-based ZAB showed superior long-term stability with only a 0.3% decline in efficiency after 534 cycles (>150 h). These results suggest that the synthesized Co/Zn/Mn@NC catalyst has great potential for practical application in ZABs.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yumao Kang, Wei Wang, Jinmei Li, Sarah Imhanria, Yaxin Hao, Ziqiang Lei
Summary: A carbonization-etching approach was used to prepare ultrathin B, N co-doped porous carbon nanosheets (BN-PCN) with hierarchically porous structure and large specific surface area, showing high catalytic activities for both ORR and OER. The BN-PCN exhibited superior stability compared to commercial Pt/C and demonstrated excellent power density and energy efficiency in a Zn-air battery setup. This study provides a promising avenue for designing heteroatom-doped porous carbon materials for clean energy conversion and storage applications.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Yali Wang, Ruihui Gan, Sa Zhao, Wenjun Ma, Xiangwu Zhang, Yan Song, Chang Ma, Jingli Shi
Summary: This study developed a cost-effective and efficient bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions. The catalyst exhibited impressive performance and small potential gap due to the synergistic effect of B, N, and F heteroatoms, large specific surface area, and abundant defect sites. The liquid and solid-state zinc-air batteries assembled with the catalyst demonstrated high open circuit potential, large specific capacity, and satisfactory cycling stability, indicating potential application in flexible and wearable electronic devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Shang Wu, Huanlei Zhao, Xin Xu, Chaoyang Liu, Penghui Zhang, Shuaishuai Fu, Qiong Su, Yuzhi Sun, Quanlu Yang, Hui Peng
Summary: This study presents a convenient strategy for the preparation of oxygen reduction catalysts with multiple heteroatomic doping, abundant defects, and porous and layered structures. The catalyst exhibits rich active sites and rapid mass/electron transport channels, leading to excellent oxygen reduction reaction activity and performance in zinc-air batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Hongjae Kim, Kyeongseok Min, Sang Eun Shim, Dongwook Lim, Sung-Hyeon Baeck
Summary: Ni-doped Mn2O3 microspheres were successfully synthesized via a facile method and showed exceptional catalytic performance in the oxygen reduction reaction and potential applications in Zn-air batteries. The superior performance of the material can be attributed to its hierarchical structure, optimized particle size, and Ni incorporation into Mn2O3, providing a new methodology for efficient electrocatalysts design.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Xiaoke Zhang, Qianfeng Liu, Zhao Yan, Shimin Liu, Erdong Wang
Summary: In this study, CuO/Co3O4@CNTs catalysts were successfully prepared for bifunctional oxygen electrocatalysts using a facile and scalable coprecipitation strategy. This unique strategy allowed the uniform growth of CuO/Co3O4 nanoparticles on CNTs and the simultaneous pyrolysis process resulted in the generation of ultrafine CuO/Co3O4 heterostructures. Due to an abundance of heterostructures, oxygen vacancies and unsaturated chemical bonds were generated in CuO/Co3O4. As a result, CuO/Co3O4@CNTs exhibited bifunctional activity with a Delta E of 0.78 V and good stability, maintaining 1000 hours of charge and discharge cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Zenghui Bi, Hua Zhang, Xue Zhao, Yuwen Wang, Fang Tan, Songqing Chen, Ligang Feng, Yingtang Zhou, Xin Ma, Zhi Su, Xinzhong Wang, Thomas Wagberg, Guangzhi Hu
Summary: In this study, a nitrogen-doped carbon material with a micro-meso-macroporous structure doped with La was prepared and its La-O/N-C active sites were confirmed by experimental results. The material exhibited low half-wave potential and overpotential for both ORR and OER reactions. A zinc-air battery with this material as the air cathode showed high power density and stable charge-discharge performance. Density functional theory calculations indicated that LaO2N4 sites had the lowest activation free energy and the most easily desorbed oxygen capacity. This study provides important insights for the design of efficient and durable alternatives to precious-metal-based catalysts.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hao-Yu Wang, Jin-Tao Ren, Chen-Chen Weng, Xian-Wei Lv, Zhong-Yong Yuan
Summary: The study successfully prepared nitrogen and sulfur dual-doped hierarchically porous carbon with trapped Mn species as a non-noble metal-based electrocatalyst, showing excellent catalytic performance and long-term stability, which is of great significance for practical application in energy conversion systems.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Kaixin Liang, Hui Zhang, Yongfeng Liang, Shun-Li Shang, Zi-Kui Liu, Junpin Lin
Summary: By coordinating nitrogen doping and pore structure, N-doped porous carbon materials were fabricated with highly comparable properties to commercial Pt/C catalysts. These carbon catalysts exhibited high catalytic activity and peak power density, making them highly feasible for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chao Xu, Peng-Peng Guo, Kun-Zu Yang, Chen Lu, Ping-Jie Wei, Jin-Gang Liu
Summary: In this study, a simple strategy for preparing a fluorine-doped Co-N-C composite as an efficient electrocatalyst for oxygen reduction reaction (ORR) was reported. The doped catalyst exhibited improved ORR performance and enhanced durability, leading to higher peak power density and open-circuit voltage in a Zn-air battery.
Article
Materials Science, Multidisciplinary
Sanshuang Gao, Tianwei Wang, Mengmeng Jin, Shusheng Zhang, Qian Liu, Guangzhi Hu, Hui Yang, Jun Luo, Xijun Liu
Summary: In this study, a bifunctional catalyst for CO2RR and ORR reactions in aqueous Zn-air batteries (ZAB) was developed. The catalyst, consisting of atomically dispersed niobium anchored onto N-doped ordered mesoporous carbon (Nb-N-C), exhibited high activity for CO2RR, ORR, and ZAB, thanks to the high Nb atom-utilization efficiency and ordered mesoporous structure. Furthermore, the self-powered CO2 electrolysis system showed promising performance with continuous CO2 conversion.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Bin Zhao, Dongping Xue, Pengfei Yuan, Wenfu Yan, Jiangwei Zhang, Shichun Mu, Jia-Nan Zhang
Summary: The preparation of single atom Fe-N-C catalysts leads to the formation of oxygen-containing moieties. The contribution of the oxygen-containing part on the oxygen reduction reaction (ORR) conducted with Fe-N-C is often overlooked, and the mechanism of the oxygen-doping structure remains unclear. However, through density functional theory (DFT) calculations, it is found that the adjacent C-O-C structure promotes charge separation and reduces the adsorption of oxygen-containing intermediates, resulting in greatly improved ORR kinetics. Experimental verification further confirms this principle, and the design of FeN4-700/900 catalysts incorporating O-rich biomass carbon substrates demonstrates enhanced ORR activity and excellent Zn-air battery performance. This study provides insights into modulating active sites and practical applications of Fe-N-C catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Zhao Li, Rui Wu, Shuhao Xiao, Yongchao Yang, Leo Lai, Jun Song Chen, Yuan Chen
Summary: This study focused on modifying FeN4 sites in Fe-N-C single-atom catalysts by introducing axial chlorine atoms, which led to improved activity and selectivity in electrochemical CO2 reduction reactions. The optimized FeN4Cl/NC catalyst exhibited high CO Faradaic efficiency, current density, and turnover frequency, making it one of the best Fe-based CO2RR catalysts reported to date. Furthermore, FeN4Cl/NC was successfully utilized as a bifunctional catalyst for rechargeable zinc-CO2 batteries, showcasing excellent stability and power density.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Pingbo Li, Xueqiang Qi, Lei Zhao, Junjie Wang, Meng Wang, Minhua Shao, Jun Song Chen, Rui Wu, Zidong Wei
Summary: A highly efficient ORR electrocatalyst with Fe-N-4 active sites was synthesized on a three-dimensional interconnected porous nitrogen-doped carbon network, showing superior activity and stability in the oxygen reduction reaction. This catalyst has great potential for practical application in zinc-air batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Nanoscience & Nanotechnology
Xiaoping Tan, Rui Wu, Qianhua Zhu, Quan Gou, Yibin Zhang, Huisheng Huang, Liang Fu
Summary: In this study, a nanocomposite of a covalent organic framework (COF) on a carbon nanotube (CNT) was prepared and utilized for the synthesis of Pd nanoparticles with a narrow size distribution. The resulting 2D heterogeneous nanomaterial, CNT-COF-Pd, exhibited strong catalytic performance towards the ethanol oxidation reaction (EOR) in direct-ethanol fuel cells (DEFCs). This superior catalytic activity can be attributed to the strong coordination effect between the N atoms inside the COF cavities and Pd, as well as the unique electrical properties of the CNT.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Xinxin Wei, Shuhao Xiao, Rui Wu, Zhaozhao Zhu, Lei Zhao, Zhao Li, Junjie Wang, Jun Song Chen, Zidong Wei
Summary: The Ni/Ni3ZnC0.7 heterostructured catalyst wrapped in porous N-doped carbon nanofibers prepared through electrospinning shows high selectivity and superior CO partial current density for CO2RR, with good stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Yiguang Zhou, Shuhao Xiao, Jinxia Jiang, Rui Wu, Xiaobin Niu, Jun Song Chen
Summary: The study shows that the Li4Ti5O12/rutile TiO2 heterostructured nanorods exhibit improved high-rate performance and capacity retention, thanks to the constructed interface between the two materials.
Article
Engineering, Environmental
Xinyan Li, Shuhao Xiao, Dengji Guo, Jinxia Jiang, Xiaobin Niu, Rui Wu, Taisong Pan, Jun Song Chen
Summary: This study presents a template-free electrodeposition method for the growth of SbBi-Se self-supported nanowall arrays on copper substrates. The resulting heterostructured material exhibits uniformly dispersed phases and interfaces, which facilitate sodium ion diffusion and electronic conduction. The material demonstrates enhanced high-rate performance and superior cyclic retention, making it a promising candidate for sodium-ion battery applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yi Wang, Zhaohong Li, Xingqun Zheng, Rui Wu, Jianfeng Song, Yulin Chen, Xinzhe Cao, Yao Nie
Summary: Strong metal-support interaction (SMSI) plays an important role in tuning catalytic behavior by facilitating migration of reducible oxides from the support onto loaded metal surfaces and alloying of the guest metal with the metal component in the support. However, the conventional high-temperature redox treatment for SMSI is limited in achieving simultaneous occurrence of oxide migration and alloying mechanisms, which restricts its application in electrocatalysis. In this study, a low-temperature solvothermal-induced SMSI is established in the CeCuOx/C supported Pt system, leading to the partial encapsulation of supported Pt by CeOx and the alloying of Cu2+ in the substrate with guest Pt. This encapsulation and alloying processes significantly improve the catalysis configuration and restructure the geometric/electronic state of interfacial Pt atoms, resulting in enhanced performance for methanol oxidation reaction (MOR).
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Qi Zhou, Xueqiang Qi, Yiguang Zhou, Junyi Li, Jinxia Jiang, Hanchao Li, Xiaobin Niu, Rui Wu, Jun Song Chen
Summary: Lithium-selenium (Li-Se) batteries have attracted widely attention due to their high volume specific capacity and good electronic conductivity of selenium. However, the rapid capacity fading, high volume changes and shuttle effect of lithium polyselenides (LiPSes) limit its further application. In this study, a zinc-cobalt bimetallic catalysts on nitrogen-doped 3D ordered porous carbon (ZnCo-NC) was constructed and applied as cathode for Li-Se batteries, showing significantly improved performance compared to single-metal counterparts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Si-Jia Zheng, Hua Cheng, Jin Yu, Qin Bie, Jing-Dong Chen, Feng Wang, Rui Wu, Daniel John Blackwood, Jun-Song Chen
Summary: A three-dimensional ordered porous nitrogen-doped carbon-supported Ni-N-x catalyst has been synthesized by direct pyrolysis of a mixture of SiO2, polyvinyl pyrrolidone, nickel-phenanthroline complex, followed by the removal of the SiO2 templates. The optimized catalyst exhibits a high CO Faradaic efficiency above 85% and a large CO current density of 16.2 mA.cm(-2), demonstrating superior CO2RR performance.
Article
Chemistry, Physical
Chuang Fu, Xueqiang Qi, Lei Zhao, Tingting Yang, Qian Xue, Zhaozhao Zhu, Pei Xiong, Jinxia Jiang, Xuguang An, Haiyuan Chen, Jun Song Chen, Andreu Cabot, Rui Wu
Summary: A dual-atom catalyst, Zn/Fe-NC, is synthesized through pyrolysis of PVP coated on Fe-doped ZIF-8, and it shows outstanding activity for oxygen reduction reaction (ORR) with high half-wave potential, excellent stability, and resistance to methanol. Density functional theory calculation reveals that the ORR overpotential is only 0.282 V, and the down-shifted d band center of active Fe affected by Zn alleviates the adsorption of OH* intermediates, thus promoting the overall ORR electrocatalytic activity. Moreover, zinc-air batteries with Zn/Fe-NC catalyst as oxygen cathode demonstrate remarkable power density and specific capacity for practical applications.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Shuhao Xiao, Jinxia Jiang, Ying Zhu, Jing Zhang, Hanchao Li, Rui Wu, Xiaobin Niu, Jiaqian Qin, Jun Song Chen
Summary: FeSe2-xSx microspheres were prepared by self-doping solvothermal method and gas phase selenization. S doping improved the Na adsorption and lowered the diffusion energy barrier, enhancing the electronic conductivity of FeSe2-xSx. The carbon-free nature of the microspheres resulted in a low specific surface area and high tap density, leading to a high initial columbic efficiency. Compared with pure FeSe2, FeSe2-xSx exhibited a high reversible capacity and enhanced rate performance. Additionally, FeSe2-xSx//NVP pouch cells achieved high energy and volumetric energy densities, demonstrating the potential applications of FeSe2-xSx microspheres.
ADVANCED POWDER MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhao Li, Xueqiang Qi, Junjie Wang, Zhaozhao Zhu, Jinxia Jiang, Xiaobin Niu, Andreu Cabot, Jun Song Chen, Rui Wu
Summary: NiN4Cl-ClNC catalysts with atomically dispersed NiN4Cl active sites are prepared through a molten-salt-assisted pyrolysis strategy. The optimized catalyst shows excellent CO2 conversion activity and outstanding stability, delivering a high CO Faradaic efficiency of 98.7% and a remarkable CO partial current density of approximately 349.4 mA cm(-2) in flow-cell. The introduced axial Ni-Cl bond and ClC bond induce electronic delocalization, stabilizing Ni and facilitating the rate-determining step of COOH* formation.
Article
Physics, Applied
Dong Yan, Shuhao Xiao, Xinyan Li, Jinxia Jiang, Qiyuan He, Hanchao Li, Jiaqian Qin, Rui Wu, Xiaobin Niu, Jun Song Chen
Summary: Transition metal sulfides have high potential for sodium storage, but their low conductivity and volume expansion affect their high-rate performance and cycling stability. In this work, a NiS2/FeS heterostructure was constructed by growing Ni-based layered double hydroxide nanosheets on Fe-based Prussian Blue nanocrystals followed by sulfurization. The resulting nanocomposite showed superior rate performance and cycle life compared to the heterostructure-free NiS2 and FeS.
ENERGY MATERIAL ADVANCES
(2023)
Article
Electrochemistry
Qin Bie, Pingbo Li, Hua Cheng, Sijia Zheng, Jin Yu, Lei Yu, Feng Wang, Rui Wu, Jingdong Chen, Jun Song Chen
Summary: A 3D hierarchical porous carbon loaded with atomically dispersed Fe-N-4 was developed as a sulfur cathode for lithium-sulfur batteries, improving conductivity and sulfur activity, and reducing volume expansion, leading to good capacity and cycling performance.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Multidisciplinary
Juncao Huang, Xiaoping Tan, Shuqin Ran, Yuxin Tao, Rui Wu, Chaofan Li, Yuxue Chen, Wen Pan
Summary: In this study, the host-guest recognition and sensing between CP6 and SC is investigated, and a highly selective and sensitive fluorescent sensing method is developed. The method is successfully applied for the detection of SC in carbonate beverages.
NEW JOURNAL OF CHEMISTRY
(2022)
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)