Article
Chemistry, Multidisciplinary
Zhiyu Shao, Xia Gao, Qian Zhu, Weifeng Zhao, Xiaotian Wu, Keke Huang, Shouhua Feng
Summary: By selectively doping different ions with different radii, the coordination sites of Co3O4 were modulated, leading to a higher intrinsic activity in the oxygen evolution reaction (OER) due to improved electrical conductivity and the formation of highly active Co3+/Co4+ species.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Wenchang Zhuang, Zhao Li, Ming Song, Wenyou Zhu, Lin Tian
Summary: Constructing 2D reduced graphene oxide (RGO) supported NiP/Fe4P nanosheets significantly improves the efficiency of electrocatalytic water splitting, showcasing excellent electrochemical stability.
Review
Chemistry, Multidisciplinary
Minseok Kim, Jaekyung Yi, Seong-Hyeon Park, Sarah. S. S. Park
Summary: This review provides strategic insights into MOF-based electrocatalysts, discussing the introduction of notable active sites and material design principles. It also explores the viability of MOFs as alternatives to currently used electrocatalysts and establishes the future direction of MOF-based electrocatalysis research.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xing-Liang Chen, Jin Lu, Yan Jiang, Yu-Feng Li, Hui Chang, Hai-Yan Yang, De-Xiang Zhang, Tian Wen, Zhi-Qiang Jiang
Summary: This research prepared a special class of Fe/Zn/Mo-based trimetallic hybrid zeolitic imidazolate frameworks that have the potential to act as highly efficient oxygen evolution reaction electrocatalysts.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Muhammad Arif, Salma Bilal, Anwar Ul Haq Ali Shah
Summary: This paper presents a detailed study on the synthesis of low-cost and efficient nitrogen-doped reduced graphene oxide nickel-silver (N-rGO-Ni/Ag) and nickel-cobalt (N-rGO-Ni/Co) nanocomposites as electrocatalysts in fuel cells. The nanocomposites exhibit remarkable electrocatalytic activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), with low onset and half wave potentials and satisfactory Tafel values.
Article
Chemistry, Multidisciplinary
Zhanzhao Fu, Qiang Li, Xiaowan Bai, Yuhao Huang, Li Shi, Jinlan Wang
Summary: This study introduces a simple coordination regulation method of the active site to improve the efficiency of CO2 conversion, demonstrates the excellent catalytic performance of NiN3B in CH4 conversion, and highlights the synergistic dual active sites formed between non-metal B and metal Ni atoms in catalysis.
Article
Engineering, Environmental
Yikui Zeng, Jinping Zhong, Huangbin Wang, Mingli Fu, Daiqi Ye, Yun Hu
Summary: A series of Co3O4/rGO nanocomposites with tunable oxygen vacancy defect concentrations were synthesized via alkali etching, with Co3O4/rGO-N0.64 exhibiting the highest photothermal catalytic performance due to the synergistic effect of oxygen vacancy defects and the thermal auxiliary effect of rGO.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Zhipeng Yu, Chaowei Si, Alec P. LaGrow, Zhixin Tai, Wolfgang A. Caliebe, Akhil Tayal, Maria J. Sampaio, Juliana P. S. Sousa, Isilda Amorim, Ana Araujo, Lijian Meng, Joaquim L. Faria, Junyuan Xu, Bo Li, Lifeng Liu
Summary: This study reports a bimetallic iridium-iron diatomic catalyst (IrFe-N-C) that exhibits excellent performance in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) and is used in zinc-air batteries.
Article
Chemistry, Multidisciplinary
Yali Liu, Yuenan Zheng, Danyang Feng, Liangliang Zhang, Ling Zhang, Xiaowei Song, Zhen-An Qiao
Summary: The study found that mesoporous Co3O4 catalyst exhibited excellent catalytic activity for the selective oxidation of aromatic alkanes, particularly the conversion of ethylbenzene to acetophenone with a conversion rate of 42% and a selectivity of 90% at 120 degrees Celsius. Furthermore, it was discovered that mCo(3)O(4) followed a unique catalytic pathway of direct oxidation from aromatic alkanes to aromatic ketones, as opposed to the conventional stepwise oxidation to alcohols and then to ketones. This implied that mCo(3)O(4) had a higher kinetic favorability for the direct oxidation of ethylbenzene to acetophenone compared to non-selective oxidation on commercial Co3O4.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Hong Li, Xinxin Shu, Haolong Xi, Zhengxing Lv, He Tian, Jintao Zhang, Haibing Xia
Summary: Fe-Cu diatomic nanoclusters with sizes of 0.5-2.5 nm were prepared by chelation interaction and doping interaction. They were proposed as a new type of active site for oxygen reduction reaction (ORR). The as-prepared catalysts showed enhanced electrocatalytic performance and better stability compared to commercial Pt/C catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Menghui Chen, Yongting Chen, Jialin Cai, Zhili Yang, Meihua Tang, Joey Chung-Yen Jung, Shengli Chen, Jiujun Zhang, Shiming Zhang
Summary: This study prepared a single-atom Fe-N-C catalyst through high-temperature pyrolysis, which contains various active sites like pyridinic-N-C, Fe-N-4, and pore defects. Density functional theory (DFT) calculations suggest that these multiple active sites synergistically function to enable high-efficiency ORR electrocatalysis. The optimal Fe-N-C catalyst shows superior ORR activity compared to commercial Pt/C catalyst.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Chang Ning Sun, Zhi Li Wang, Xing-You Lang, Zi Wen, Qing Jiang
Summary: This study investigated the behavior of intermediates in the nitrogen reduction reaction (NRR) for fifteen double-atom catalysts (DACs) through density functional theory calculations, revealing that intermediates can be adsorbed through different configurations according to the activity improvement needs under the synergistic effect of active sites on appropriate DACs. VFe-N-C exhibited the best catalytic activity for electrochemical NRR, with a limiting potential of -0.36 V vs. the reversible hydrogen electrode. The proposed synergistic effect of active sites on DACs for NRR could offer a new method for designing NRR catalysts.
Article
Chemistry, Physical
Juan Bai, Jun Mei, Jing Shang, Xin Mao, Dongchen Qi, Ting Liao, Aijun Du, Ziqi Sun
Summary: It is well known that the activity of electrocatalytic oxygen evolution reaction (OER) depends on the active centers of electrocatalysts. In this study, molybdenum oxide catalysts were used as a representative model and it was found that the inactive molybdenum sites can be regenerated as synergistic active centers for promoting OER through phosphorus-modulated defective engineering. The optimal catalyst achieved an overpotential of 287 mV for a current density of 10 mA cm(-2) with only 2% performance decay after 50 hours of continuous operation. This work provides insights into activating inert metal sites on oxide catalysts to enhance their electrocatalytic properties.
Article
Chemistry, Multidisciplinary
Wanchao Kang, Ruifang Wei, Heng Yin, Dongfeng Li, Zheng Chen, Qinge Huang, Pengfei Zhang, Huanwang Jing, Xiuli Wang, Can Li
Summary: Using transient absorption spectroscopy and a photo-sensitization strategy, we have successfully resolved the sequential oxidation kinetics of water oxidation in the OER catalytic cycle, providing insights into the kinetic understanding of heterogeneous catalysis with multi-sites.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Ruimin Li, Rong Zhang, Boyang Zhang, Wei Fang, Yalei Qiao, Wenyang Wang, Zixiang Cui, Ding Zhang
Summary: Bifunctional catalyst Co3O4/N-rGO with particle size of 27-31 nm, prepared using a one-pot synthesis method, exhibits better ORR and OER activity, excellent current stability, and methanol tolerance compared to commercial Pt/C and RuO2/C.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2021)
Article
Energy & Fuels
Jayasmita Jana, Ravi Nivetha, Huynh Ngoc Diem, Tran Van Phuc, Sung Gu Kang, Jin Suk Chung, Won Mook Choi, Seung Hyun Hur
Summary: In this study, a ternary composite material was synthesized as an electrode material for water reduction under alkaline conditions. The study showed that the material has selective reactive sites, requires a significant overpotential to achieve the desired current density, and exhibits good reaction rate and stability.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Thanh Truong Dang, Thi Kim Anh Nguyen, K. C. Bhamu, Tahereh Mahvelati-Shamsabadi, Vo Kim Hieu Van, Eun Woo Shin, Koo-Hyun Chung, Seung Hyun Hur, Won Mook Choi, Sung Gu Kang, Jin Suk Chung
Summary: In this work, the in situ exfoliation of graphitic carbon nitride (g-C3N4) and engineering of holey defects on 2D g-C3N4 layers were achieved. The solvothermal treatment of g-C3N4-bulk in various organic solvents led to the formation of self-assembled graphene. Tetrahydrofuran solvent was used to engineer uniform holey defects on 2D g-C3N4 nanosheets, resulting in enhanced photocatalytic performance. The full exfoliation of the engineered nanostructure in reaction media maximized the accessibility of active sites, leading to high H2 evolution rate.
Article
Materials Science, Multidisciplinary
Ngoc-Diem Huynh, Jayasmita Jana, Ravi Nivetha, Tran Van Phuc, Jin Suk Chung, Seung Hyun Hur
Summary: Depositing NiO/Co3O4 on siloxene multi-sheets increased the activity for the hydrogen evolution reaction (HER) during water splitting. The hierarchical structure of the composite and synergistic effect of metal oxides enhanced the catalytic activity, exhibiting a low overpotential and stability in 1 M KOH. The as-prepared catalyst shows promise as an electrocatalyst for HER due to the low cost of transition metal oxides, abundance of silicon on Earth, and simplicity of the synthesis process.
CURRENT APPLIED PHYSICS
(2022)
Article
Electrochemistry
Krishnan Subramanyan, Sanming Chen, Na Li, Tingting Ma, Yongping Liu, Sundaram Chandrasekaran, Vanchiappan Aravindan
Summary: We report a new low-voltage insertion anode based on MXene V4C3Tx and compare its electrochemical performance with ester and ether-based electrolytes in both half-cell and full-cell configurations. The results show that the ether-based electrolyte exhibits better retention ability and rate performance. In addition, the formation of a passivation layer in the carbonate-based electrolyte leads to increased initial Coulombic inefficiency. Full-cell tests with NVPC cathode also demonstrate that the ether-based electrolyte provides enhanced capacity, capacity retention, and rate performance compared to ester-based electrolytes.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Applied
Chenglu Liu, Zhengyan Xu, Sundaram Chandrasekaran, Yongping Liu, Mengyang Wu
Summary: In this study, a conductive double network hydrogel with unique properties such as self-healing, self-adhesive, and antibacterial activity was successfully fabricated. The hydrogel exhibited excellent self-healing and adjustable mechanical properties, as well as remarkable antibacterial activities. It also showed great potential in flexible wearable materials and health monitoring.
CARBOHYDRATE POLYMERS
(2023)
Article
Materials Science, Multidisciplinary
Tran Van Phuc, Seung Hyun Hur
Summary: Bifunctional water-splitting electrocatalysts were synthesized through the pyrolysis of bimetallic metal-organic frameworks. The as-synthesized catalyst exhibited excellent electrocatalytic activity with very low overpotentials of 261 mV for OER and 101 mV for HER at 10 mA cm-2 in 1.0 M KOH. The well-developed porous structure and conductive sp2 networks during pyrolysis enhanced the electrocatalytic activity, and computational simulation showed the role of N-doping in lowering adsorption energies and accelerating water-splitting kinetics. The as-prepared catalysts showed no current drops even after 3000 cycles and demonstrated excellent long-term stability.
CURRENT APPLIED PHYSICS
(2023)
Review
Energy & Fuels
Ravi Nivetha, Sushant Sharma, Jayasmita Jana, Jin Suk Chung, Won Mook Choi, Seung Hyun Hur
Summary: Metal-organic frameworks (MOFs) are porous crystalline materials formed by coordination bonding between organic ligands and metal ions or clusters, and have attracted significant interest due to their high porosity, diverse structures, and controllable chemical composition. The focus has recently shifted to 2D transition-metal (TM)-based MOFs, which exhibit high aspect ratios and can be used to construct heterostructures with high electrical conductivity and abundant active sites. This review provides a comprehensive overview of the synthesis strategies, applications, and recent advances in energy conversion and storage of 2D TM-based MOFs and their composites/derivatives.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Physical
Jayasmita Jana, Tata Sanjay Kanna Sharma, Jin Suk Chung, Won Mook Choi, Seung Hyun Hur
Summary: In this study, iron-molybdenum composites with carbide and oxide functionalities were synthesized and their catalytic activities towards the electrolysis of water and urea were investigated. A 3D carbon nano-nest (CnN) was used as the carbide source and stabilizing agent. Different behavior was observed when the materials were used as electrode materials for water splitting and alkaline urea electrolysis. The reaction mechanism depended on the nature of the catalyst surface and constituents.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Sundaram Chandrasekaran, Rong Hu, Lei Yao, Lijun Sui, Yongping Liu, Amor Abdelkader, Yongliang Li, Xiangzhong Ren, Libo Deng
Summary: We successfully fabricated bifunctional M-N-C catalysts for rechargeable zinc-air batteries using a new class of metal-organic framework. These catalysts exhibited excellent alkaline oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities, with lower overpotentials and half-wave potentials compared to commercial Pt/C catalysts. The strong electronic correlation between metallic Co nanoparticles and atomic Co-N-4 sites in the catalysts enhanced the adsorption/desorption of intermediates in ORR/OER, resulting in improved bifunctional electrocatalytic performance. The Co@C-CoNC-based rechargeable zinc-air battery showed high power density and stability during discharge.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Physical
Namachivayam Karthik, Sundaram Chandrasekaran, Thomas Nesakumar Jebakumar Immanuel Edison, Raji Atchudan, Seung Tae Choi
Summary: The effect of femtosecond (FS) laser-texturing on the oxygen evolution reaction (OER) of 316 L stainless steel (SS) plates was studied. FS laser texturing was used to create oxyhydroxide layers with dimple structures on the SS electrodes. The FS laser textured electrodes showed improved OER activity in terms of overpotential and current density.
MOLECULAR CATALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Thanh Truong Dang, K. C. Bhamu, Tahereh Mahvelati-Shamsabadi, Thi Kieu Oanh Nguyen, Eun Woo Shin, Koo-Hyun Chung, Seung Hyun Hur, Won Mook Choi, Sung Gu Kang, Jin Suk Chung
Summary: The solvothermal treatment of bulk g-C3N4 in an environmentally sustainable organic solvent resulted in the formation of grid-like structured graphene on g-C3N4, facilitating charge transfer and separation. The grid-like structure also contributed to the formation of a platinum oxide cocatalyst and significantly improved the photocatalytic activity.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Tahereh Mahvelati-Shamsabadi, Kailash Chandra Bhamu, Seong-hun Lee, Thanh Truong Dang, Vu Hoang Khoi, Seung Hyun Hur, Won Mook Choi, Sung Gu Kang, Tae Joo Shin, Jin Suk Chung
Summary: This paper reports the formation of coordinatively unsaturated atomically dispersed Pt+2 sites on hexagonal nanosheets of g-C3N4. The structure with a Pt loading of 0.38 wt% exhibited a superb photocatalytic hydrogen evolution rate of 2900 μmol g-1 h-1, which was 5.6 times higher than that of the reactive Pt1 sites on bulk. Advanced spectroscopic analysis and DFT calculations revealed the strong electronic metal-support interactions between Pt1 and HCN, which effectively reduced the adsorbed Pt+4 sites into Pt+2 and created favorable uniform Pt+2-N4 moieties at low Pt loading for water adsorption, dissociation, and H2 evolution.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Jayasmita Jana, Tata Sanjay Kanna Sharma, Jin Suk Chung, Won Mook Choi, Seung Hyun Hur
Summary: In recent years, the search for transition-metal-based materials for overall water splitting in the energy field research has gained attention. A series of late first-row transition-metal molybdates (TMMo) were studied for alkaline water splitting, where the materials were synthesized through a hydrothermal process. Among the molybdates, CoMo exhibited the best activity and stability, making it a potential commercial alternative electrocatalyst for overall water splitting.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Ngoc-Diem Huynh, Won Mook Choi, Seung Hyun Hur
Summary: In this study, various two-dimensional materials were used as supports for the bimetallic Co and Mo sulfide/oxide (CMSO) heterostructure. The CMSO supported on reduced graphene oxide (rGO), graphite carbon nitride (gC3N4), and siloxene (SiSh) exhibited better water electrolysis activity compared to pristine CMSO. Particularly, the CMSO@rGO showed a large surface area, low interface charge-transfer resistance, low overpotential of 259 mV (10 mA/cm2), a Tafel slope of 85 mV/dec, and excellent long-term stability over 40 hours of continuous operation in the oxygen evolution reaction.
Article
Nanoscience & Nanotechnology
Pham Duc Minh Phan, Duc-Viet Nguyen, Nguyen Hoai Anh, Huynh Phuoc Toan, Pho Phuong Ly, Dai-Phat Bui, Seung Hyun Hur, Thuy Dieu Thi Ung, Do Danh Bich, Hoai-Thanh Vuong
Summary: This study proposes a facile one-step method to fabricate CdS/g-C3N4 nanocatalysts for the production of H2O2 from water and oxygen under light and ultrasound irradiation. The results show that the formation of H2O2 relies on oxygen radical species and is promoted by the interaction between CdS and g-C3N4.
ACS APPLIED NANO MATERIALS
(2023)
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)