Journal of Electrochemical Energy Conversion and Storage最新文献_第3页

Supercapacitors based on spider nest shaped nickel foam electrodes operating in seawater 基于蜘蛛巢状泡沫镍电极在海水中工作的超级电容器

4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-10-03 DOI: 10.1115/1.4063612

Haiying Li, Yuchen Hui, Zunbin Xia, Huixin Wang

{"title":"Supercapacitors based on spider nest shaped nickel foam electrodes operating in seawater","authors":"Haiying Li, Yuchen Hui, Zunbin Xia, Huixin Wang","doi":"10.1115/1.4063612","DOIUrl":"https://doi.org/10.1115/1.4063612","url":null,"abstract":"Abstract An environmental-friendly supercapacitor based on aqueous electrolyte was fabricated. Electrodes with conductive spider nest–shaped three-dimensional(3D)porous structure was prepared for the assembly of symmetric supercapacitors. The nickel foam was modified by multiwalled carbon nanotubes and β-cyclodextrin. The construction of spider nest was stabilized via the chemical bond inside carbon nanotubes, π-π stack effects among carbon nanotubes, and physical adsorption between nickel foam and carbon nanotubes substrate. The role of β-cyclodextrin is dispersant to prevent agglomeration of carbon nanotubes, thereby enhancing electroactive surface area of nickel foam, and improving the specific capacitance of the electrodes. Furthermore, the electrodes exhibited excellent rate capability. The obtained symmetrical supercapacitors exhibited excellent power density of 17561.3 W kg−1, good specific capacitance of 398.8 F g−1, and energy density of 154.8 Wh kg−1 for 4000 cycles with outstanding cycling stability. In addition, the specific capacitance, energy density, and power density of the supercapacitor operating in seawater were found to be 100.2 F g−1, 17.8 Wh kg−1, and 2568 Wh kg−1, respectively, for 3000 cycles. Overall, our findings indicate that the supercapacitor could stably operate in seawater and shows potential for use as an eco-friendly power supply to marine engineering equipment.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135696204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lattice Boltzmann Simulations of non-homogeneous Li-O2 Battery Cathode: the effect of spatial and temporal porosity variations 非均匀锂氧电池正极的晶格玻尔兹曼模拟:时空孔隙度变化的影响

4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-09-22 DOI: 10.1115/1.4063489

Ajeesh Mohan T, Jithin M, Malay Das

{"title":"Lattice Boltzmann Simulations of non-homogeneous Li-O2 Battery Cathode: the effect of spatial and temporal porosity variations","authors":"Ajeesh Mohan T, Jithin M, Malay Das","doi":"10.1115/1.4063489","DOIUrl":"https://doi.org/10.1115/1.4063489","url":null,"abstract":"Abstract The porosity of the cathode in a lithium-oxygen battery is a crucial parameter that influences oxygen transport and active surface area availability. This study explores various cathode models with different initial porosity distributions and analyses the porosity evolution during discharge. The objective is to maximize the active surface area utilization of the cathode and increase the battery's discharge capacity. The simulations employ a recently developed Lattice Boltzmann method (LBM) model proposed by Chen et al. (Chen, S., B. Yang, and C. Zheng, Simulation of double-diffusive convection in fluid-saturated porous media by lattice Boltzmann method. International Journal of Heat and Mass Transfer, 2017. 108: p. 1501-1510.), which is capable of handling spatial and temporal variations in diffusion coefficient values. The results demonstrate that a hierarchical porous cathode provides a better specific capacity than a uniform porous cathode with the same average initial porosity. The specific capacity increases as the magnitude of initial porosity variation in the domain increases. Furthermore, incorporating oxygen channels improves oxygen transport in the cathode and offers a better specific capacity than the hierarchical porous cathode. A combination of hierarchical porous media and oxygen channels delivers the best specific capacity among all the other cathode models, as it efficiently balances oxygen transport and active surface area.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136060933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Power batteries state of health estimation of pure electric vehicles for charging process 纯电动汽车充电过程中动力电池健康状态评估

4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-09-13 DOI: 10.1115/1.4063430

Zhigang He, Xianggan Ni, Chaofeng Pan, Weiquan Li, Shaohua Han

{"title":"Power batteries state of health estimation of pure electric vehicles for charging process","authors":"Zhigang He, Xianggan Ni, Chaofeng Pan, Weiquan Li, Shaohua Han","doi":"10.1115/1.4063430","DOIUrl":"https://doi.org/10.1115/1.4063430","url":null,"abstract":"Abstract Under different usage scenarios of various electric vehicles (EVs), it becomes difficult to estimate the battery state of health (SOH) quickly and accurately. This paper proposes a SOH estimation method based on EVs' charging process history data. First, data processing processes for practical application scenarios are established. Then the health indicators (HIs) that directly or indirectly reflect the driver's charging behavior in the charging process are used as the model's input, and the ensemble empirical mode decomposition (EEMD) is introduced to remove the noise brought by capacity regeneration. Subsequently, the maximum information coefficient (MIC) - principal component analysis (PCA) algorithm is employed to extract significant HIs. Eventually, the global optimal nonlinear degradation relationship between HIs and capacity is learned based on Bayesian optimization (BO)-Gaussian process regression (GPR). Approximate battery degradation models for practical application scenarios are obtained. This paper validates the proposed method from three perspectives: models, vehicles, and regions. The results show that the method has better prediction accuracy and generalization capability and lower computational cost, which provides a solution for future online health state prediction based on a large amount of real-time operational data.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":"128 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135742204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heat transfer improvement of prismatic lithium-ion batteries via a mini-channel liquid-cooling plate with vortex generators 利用带涡流发生器的小通道液冷板改善棱柱形锂离子电池的传热性能

IF 2.5 4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-08-31 DOI: 10.1115/1.4063324

Huanwei Xu, Shi-Shuang Xiong, Wei Li, Lingfeng Wu, Zhonglai Wang

{"title":"Heat transfer improvement of prismatic lithium-ion batteries via a mini-channel liquid-cooling plate with vortex generators","authors":"Huanwei Xu, Shi-Shuang Xiong, Wei Li, Lingfeng Wu, Zhonglai Wang","doi":"10.1115/1.4063324","DOIUrl":"https://doi.org/10.1115/1.4063324","url":null,"abstract":"\u0000 Temperature is a critical factor affecting the performance and safety of battery packs of electric vehicles (EVs). The design of liquid cooling plates based on mini-channels has always been the research hotspots of battery thermal management systems (BTMS). This paper investigates the effect of adding vortex generators (VGs) to the liquid cooling channel on the heat dissipation capacity and temperature uniformity of the battery. The shape of the vortex generators (triangle, trapezoid, and semicircle), placement position (middle, inlet, and outlet of the channel), different flow rates, and different number of channels on the heat dissipation of the battery are systematically analysed. The research results indicate that: (1) The semi-circular vortex generator has better heat dissipation and a relatively lower impact on pressure drop than the triangular and trapezoidal vortex generators (2) The effect of adding vortex generators is more obvious when the flow rate is small in the cooling channels. When the flow velocity is 0.025 m/s, the heat dissipation performance can be increased by 7.4%. (3) When the cross-sectional area of the inlet is fixed, the heat dissipation effect of more channels is better. The average temperature of three and seven cooling channels decreases with a decrease of 8.87%. (4) The temperature difference can be effectively reduced when the vortex generators are concentrated near the outlet of the flow outlet. Its temperature difference is lower than that when the vortex generators are placed near the inlet, with a decrease of 10.5%.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47923316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical performance of Co1-xMnxFe2O4 decorated nanofiber Polyaniline (PAni) composites Co1-xMnxFe2O4修饰纳米纤维聚苯胺（PAni）复合材料的电化学性能

IF 2.5 4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-08-31 DOI: 10.1115/1.4063303

Sura R. Mohammed, M. Ismail, I. Ibrahim

{"title":"Electrochemical performance of Co1-xMnxFe2O4 decorated nanofiber Polyaniline (PAni) composites","authors":"Sura R. Mohammed, M. Ismail, I. Ibrahim","doi":"10.1115/1.4063303","DOIUrl":"https://doi.org/10.1115/1.4063303","url":null,"abstract":"\u0000 The current work is concerned with preparing cobalt manganese ferrite (Co1-xMnxFe2O4) with different concentrations of cobalt and manganese (x= 0.2, 0.4, and 0.6) and decorating it with polyaniline (PAni) for use in supercapacitive applications. The results of the X-Ray diffraction (XRD) manifested a broad peak of PAni and a cubic structure of cobalt manganese ferrite having crystal size between 60 nm - 138 nm, which decreases with increasing concentration of Mn. The field emission scanning electron microscopy (FE-SEM) images evidenced that the PAni has nanofiber (NFs) structures, according to the method of preparation, where the hydrothermal method was used. The magnetic properties of the prepared ferrite, as well as the prepared PAni/Co1-xMnxFe2O4 composites, were studied through the vibrating sample magnetometer (VSM) analysis, where the magnetic hysteresis loops of ferrite elucidated a significant influence on the manganese content and the decorated PAni, through the decrease of both saturation magnetism (Ms) and remnant magnetism (Mr) in addition to the corrosive field (Hc). Increasing the content of manganese in the composites led to an improvement in the energy storage performance of the capacitors, which were tested in 1 M of H2SO4 by using the CV cyclic voltammetry analysis, galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). Increasing the manganese content caused an increase in the specific capacity and a significant increase in the charging and discharging time; the highest capacitance is 556 F/g.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43712305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation and controllability study of electrochemical actuators based on Si/CNTs composite material 基于Si/CNTs复合材料的电化学致动器的实验研究与可控性研究

IF 2.5 4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-07-27 DOI: 10.1115/1.4063057

Zhilin Wu, Xiaobing Yang, Kai Sheng, Dawei Li

{"title":"Experimental investigation and controllability study of electrochemical actuators based on Si/CNTs composite material","authors":"Zhilin Wu, Xiaobing Yang, Kai Sheng, Dawei Li","doi":"10.1115/1.4063057","DOIUrl":"https://doi.org/10.1115/1.4063057","url":null,"abstract":"\u0000 Electrochemical actuators can convert electrical energy into mechanical energy directly and have been applied widely. With a large volume expansion in the electrochemical reaction, silicon material demonstrates enormous potential in the manufacture of the electrochemical actuators. Here, we propose a new electrochemical actuator based on Si/CNTs composite electrode. A mathematical model is developed to analyze the relationship among material parameters, structural changes, and bending deformation. The curvature changes of the cantilever beam are captured by a CCD camera during electrochemical cycling. Combining the model and bending curvatures, the modulus and swell strain are extracted and detailed analyzed. Here, the elastic modulus of the composite electrode softens and decreases from 9.59 GPa to 4.78 GPa, while the swell strain increases from 0.12% to 2.97% when arriving 6% normalized concentration of lithium. These results show that the composite material possesses excellent bending resistance and deformation ability. Also, the curvature changes under different thickness ratios are predicted successfully, the evolution of stress in the working electrode is simulated, and the loading experiment of the actuator is carried out. This work provides a new way to realize the controllability of the electrochemical actuators.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48745520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal and Air Management of an Open Cathode PEM Fuel Cell using Sliding Mode Control 采用滑模控制的开阴极PEM燃料电池的热管理和空气管理

IF 2.5 4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-07-27 DOI: 10.1115/1.4063056

K. Ram, Shanal Kumar, Vincent Léchappé, A. Mohammadi, Maurizio Cirrincione

{"title":"Thermal and Air Management of an Open Cathode PEM Fuel Cell using Sliding Mode Control","authors":"K. Ram, Shanal Kumar, Vincent Léchappé, A. Mohammadi, Maurizio Cirrincione","doi":"10.1115/1.4063056","DOIUrl":"https://doi.org/10.1115/1.4063056","url":null,"abstract":"\u0000 The paper presents a simplified nonlinear model for an open cathode proton exchange membrane fuel cell (PEMFC) and its control by using three different strategies. The model presented uses four state variables. The mass flow of oxygen, hydrogen flow, water and temperature were taken to be the critical dynamics in the system. The unknown parameters were estimated using the experimental data of a 1.2 kW PEMFC. The simplified model showed good agreement with experimental results. Control schemes were implemented to control the stack temperature of the PEMFC. The proportional (P) and proportional-integral (PI) Control performed well but had a poorer response compared to the sliding mode control (SMC) scheme. The study of the different control schemes reveals the dangers of singularly controlling either the oxygen excess ratio or the temperature. Results show the best control is achieved when the excess ratio is control through the reference temperature. The study also compares the parasitic losses from the fans caused by the different controllers. Overall the results provide a good insight into designing a robust control system for an open cathode PEMFC for faster response and greater durability.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44175269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Promoting Effect of PbO on Ir Nanosurface Towards Ethanol Electrocatalytic Oxidation in Alkaline Media PbO对Ir纳米表面乙醇在碱性介质中电催化氧化的促进作用

IF 2.5 4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-07-25 DOI: 10.1115/1.4063017

Huazhong Ma, Sheng-Rong He, Xingyu Ma, Yaoyue Yang

{"title":"Promoting Effect of PbO on Ir Nanosurface Towards Ethanol Electrocatalytic Oxidation in Alkaline Media","authors":"Huazhong Ma, Sheng-Rong He, Xingyu Ma, Yaoyue Yang","doi":"10.1115/1.4063017","DOIUrl":"https://doi.org/10.1115/1.4063017","url":null,"abstract":"\u0000 Metal-metal (hydr)oxide interfaces can promote the CO2 selectivity of ethanol oxidation reaction (EOR) due to so-called metal-oxide-interaction (MOI). Here, we first show that the mixture of Ir and PbO species at the nanoscale can also form “bifunctional effect” sites, where C-C bond of ethanol can be effective cut at Ir sites to generate C1 intermediates, and nearby PbO species could provide oxygenated-species. Actually, the as-prepared Ir-PbO/C catalysts with a mean metallic nanoparticle size of 2.6±0.5 nm can greatly improve the activity, stability and C1 pathway selectivity of EOR. Specifically, it exhibits superior mass activity of 1150 mA mg−1Ir in 1 M NaOH solution containing 1 M C2H5OH. Chronoamperometry tests show that the stability of Ir-PbO/C is also significantly improved compared with Ir/C. In situ electrochemical infrared absorption spectral results confirm that the addition of oxophilic PbO species could accelerate the oxidative removal of COad intermediates, thereby greatly improving catalytic performance. This study may give new insights into designing efficient anode catalysts for the direct ethanol fuel cells (DEFCs).","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47320759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Cooling System Boundary Conditions on the Performance of Proton Exchange Membrane Fuel Cell: A Comprehensive Analysis 冷却系统边界条件对质子交换膜燃料电池性能影响的综合分析

IF 2.5 4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-07-25 DOI: 10.1115/1.4063016

Yaochen Wang, H. Ren, Cong Li

{"title":"Effects of Cooling System Boundary Conditions on the Performance of Proton Exchange Membrane Fuel Cell: A Comprehensive Analysis","authors":"Yaochen Wang, H. Ren, Cong Li","doi":"10.1115/1.4063016","DOIUrl":"https://doi.org/10.1115/1.4063016","url":null,"abstract":"\u0000 We developed a three-dimensional multiphysics numerical model of a Proton Exchange Mem-brane Fuel Cell (PEMFC) with a cathode mesh structure to investigate how coolant flow rate and temperature impact its performance. After experimentally validating the model, we compared the performance of the cathode mesh structure PEMFC with that of the traditional straight flow PEMFC. The results indicate that the cathode mesh structure PEMFC has a lower pressure drop and a more index of uniform distribution (IUD), leading to enhanced performance, better temperature distribution, and improved water management of the PEMFC. The investigation of the cooling system's operating parameters revealed that the temperature of the cathode catalyst layer in the PEMFC is the highest, while the temperature of the bipolar plate is the lowest. Of the nine cases that we evaluated, Case 7, with a coolant inlet temperature and flow rate of 303.15 K and 0.07 m s−1, respectively, yielded the highest power density and the lowest average temperature. The IUD of the PEM in Case 5 was 0.608, suggesting that the temperature distribution of the PEM is more uniform when the coolant inlet temperature and flow rate are 323.15 K and 0.05 m s−1, respectively. We have demonstrated through calculations that there is a strong correlation between temperature difference and IUDs. These findings have significant implications for the optimization and application of PEMFCs.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47602791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A approach for fast-charging lithium-ion batteries state of health prediction based on model-data fusion 基于模型数据融合的快速充电锂离子电池健康状态预测方法

IF 2.5 4区工程技术

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-07-19 DOI: 10.1115/1.4062990

Hailin Feng, Yatian Liu

引用次数: 0