Journal of Power Sources Advances最新文献_第4页

A novel method for alleviating numerical stiffness in Li-ion thermal abuse models 一种减轻锂离子热滥用模型数值刚度的新方法

IF 4.5

Journal of Power Sources Advances Pub Date : 2023-08-01 DOI: 10.1016/j.powera.2023.100123

Jason Ostanek , Mohammad Parhizi , Judith Jeevarajan

{"title":"A novel method for alleviating numerical stiffness in Li-ion thermal abuse models","authors":"Jason Ostanek , Mohammad Parhizi , Judith Jeevarajan","doi":"10.1016/j.powera.2023.100123","DOIUrl":"10.1016/j.powera.2023.100123","url":null,"abstract":"<div><p>Numerical modeling of thermal runaway in Lithium-ion batteries has become a critical tool for designing safer battery systems. Significant progress has been made in developing kinetic mechanisms for decomposition reactions and including additional physics such as venting and combustion. However, the governing heat conduction equation and decomposition reaction equations become numerically stiff during thermal runaway, which limits the utility of thermal abuse models to low-dimensional formulations. The present work introduces a new solution strategy, which switches from the full, 3D transient heat conduction formulation to an adiabatic, 0D lumped body formulation only during the stiff portion of the simulation, i.e., only during thermal runaway. To test the new solver, a 3D thermal abuse model was configured to simulate an oven test of an 18650-format cell. The new solver was exercised for scenarios of varying degrees of stiffness, and the results were compared with a baseline solver using typical integration methods. For an extremely stiff scenario, computation speed was increased by a factor of 183x relative to the baseline solver, with little impact on solution accuracy, thus effectively alleviating the numerical stiffness issue. The new solution strategy addresses the poor scalability of high-dimensional models, such as 3D-CFD-based thermal abuse models, and improves their practicality for industrial use.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44660576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of liquid water distribution in GDL under cross-flow-inducing parallel flow field using operando synchrotron X-ray radiography 横流诱导平行流场下GDL内液态水分布的operando同步辐射x射线测量

IF 4.5

Journal of Power Sources Advances Pub Date : 2023-06-01 DOI: 10.1016/j.powera.2023.100119

Takahisa Suzuki , Akihiko Kato , Satoshi Yamaguchi , Yasutaka Nagai , Daisuke Hayashi , Satoru Kato

{"title":"Measurement of liquid water distribution in GDL under cross-flow-inducing parallel flow field using operando synchrotron X-ray radiography","authors":"Takahisa Suzuki , Akihiko Kato , Satoshi Yamaguchi , Yasutaka Nagai , Daisuke Hayashi , Satoru Kato","doi":"10.1016/j.powera.2023.100119","DOIUrl":"https://doi.org/10.1016/j.powera.2023.100119","url":null,"abstract":"<div><p>Baffles in flow field channels for air in a polymer electrolyte fuel cell are known to enhance the performance by inducing convective flow through the gas diffusion layer (GDL) with smaller pressure loss than interdigitated flow fields. This work experimentally correlates performance enhancement with the amount of liquid water in a GDL. A parallel flow field (PFF) that has different inlet and outlet opening sizes is applied to induce cross-flow in the GDL under the rib between adjacent air channels. Operando synchrotron X-ray radiography experiments are conducted to compare the amount of water in the GDL with that for a PFF having the same inlet and outlet sizes. The performance enhancement by application of different opening sizes increases with decreasing relative humidity and increasing air flow rate. A significant performance enhancement is observed when the amount of water in the GDL substrate under the rib becomes almost zero. No performance enhancement is observed under over-humidified conditions, although a decrease in the amount of water in the GDL is still observed, which suggests that the performance becomes insensitive to the difference in the liquid water saturation as the saturation increases.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49751845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulations of all-solid-state batteries using specific contact area diameters for active materials determined by X-ray computed tomography 使用X射线计算机断层扫描确定的活性材料比接触面积直径的全固态电池的数值模拟

IF 4.5

Journal of Power Sources Advances Pub Date : 2023-04-01 DOI: 10.1016/j.powera.2023.100120

S. Iwamoto , M. Kodama , K. Yanagi , Y. Haniu , Y. Fujii , N. Masuda , H. Higuchi , Y. Suetsugu , S. Hirai

{"title":"Numerical simulations of all-solid-state batteries using specific contact area diameters for active materials determined by X-ray computed tomography","authors":"S. Iwamoto , M. Kodama , K. Yanagi , Y. Haniu , Y. Fujii , N. Masuda , H. Higuchi , Y. Suetsugu , S. Hirai","doi":"10.1016/j.powera.2023.100120","DOIUrl":"10.1016/j.powera.2023.100120","url":null,"abstract":"<div><p>At present, it would be desirable to improve the C-rate values of bulk-type all-solid-state lithium-ion batteries by optimizing the electrode structures. Although simulations are an effective means of determining optimal structures, a high degree of accuracy is required. The present study demonstrates a pseudo-two-dimensional (P2D) method of simulating cathodes providing improved accuracy along with low computational cost and based on actual three-dimensional electrode structures. This method incorporates the volume fraction and tortuosity of the solid electrolyte (SE) and active material (AM), both of which are widely used in conventional simulations, and takes into account the specific contact area diameter (D<sub>SCA</sub>) of the AM. The latter parameter reflects the extent of AM particle aggregation and is obtained from the analysis of three-dimensional X-ray computed tomography images. The validity of these P2D simulations is confirmed by comparison with experimental results for three electrodes having different SE particle sizes. The experimental result shows that battery capacity is increased with decreases in the SE particle sizes. This effect is not predicted using conventional P2D simulations employing only volume fraction and tortuosity but is reproduced by P2D simulations in which D<sub>SCA</sub> values are used to model AM particle aggregation and Li diffusion within AM particles.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47861094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The effect of addition of the redox mediator dimethylphenazine on the oxygen reaction in porous carbon electrodes for Li/O2 batteries 氧化还原介质二甲非那嗪的加入对锂/氧电池多孔碳电极氧反应的影响

IF 4.5

Journal of Power Sources Advances Pub Date : 2023-03-01 DOI: 10.1016/j.powera.2023.100113

Matthias Augustin , Per Erik Vullum , Fride Vullum-Bruer , Ann Mari Svensson

{"title":"The effect of addition of the redox mediator dimethylphenazine on the oxygen reaction in porous carbon electrodes for Li/O2 batteries","authors":"Matthias Augustin , Per Erik Vullum , Fride Vullum-Bruer , Ann Mari Svensson","doi":"10.1016/j.powera.2023.100113","DOIUrl":"10.1016/j.powera.2023.100113","url":null,"abstract":"<div><p>Secondary Li–O<sub>2</sub> batteries are promising due to their potentially high theoretical energy density. However, both the discharge (oxygen reduction reaction, ORR) and the recharge reaction (oxygen evolution reaction, OER) are associated with high irreversible losses, and multiple side reactions, depending on the electrolyte of choice. Addition of redox mediators is currently considered a promising route to combat the challenges of the highly irreversible ORR/OER. In this work, the effect of addition of the redox mediator 5,10-dimethylphenazine (DMPZ) on the capacity and reversibility of the oxygen reaction is investigated in porous carbon electrodes. The electrolytes are based on tetraethylene glycol dimethyl ether (TEGDME) as solvent, and either Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) as salt, or a combination of LiTFSI and LiNO<sub>3</sub> salt, alternatively dimethyl sulfoxide (DMSO) as solvent, with LiTFSI salt. The addition of DMPZ results in a significant improvement of the reversibility of the ORR/OER reactions for electrolytes based on LiTFSI in DMSO, and LITFSI + LiNO<sub>3</sub> in TEGDME. This is attributed to a depression of the side reactions limiting the recharge reaction in these electrolytes. Post mortem analyses by XRD, SEM, as well as FIB-SEM investigations of cross sections, are used to characterize the products from the side reactions.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45576908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning for optimal electrode wettability in lithium ion batteries 基于机器学习的锂离子电池电极润湿性优化

IF 4.5

Journal of Power Sources Advances Pub Date : 2023-03-01 DOI: 10.1016/j.powera.2023.100114

Amina El Malki , Mark Asch , Oier Arcelus , Abbos Shodiev , Jia Yu , Alejandro A. Franco

{"title":"Machine learning for optimal electrode wettability in lithium ion batteries","authors":"Amina El Malki , Mark Asch , Oier Arcelus , Abbos Shodiev , Jia Yu , Alejandro A. Franco","doi":"10.1016/j.powera.2023.100114","DOIUrl":"10.1016/j.powera.2023.100114","url":null,"abstract":"<div><p>Electrode wetting is a critical step in the Lithium-Ion Battery manufacturing process. The injection of electrolyte in the electrodes’ porosity requires the application of pressure-vacuum pumping strategies without warranty that the full porosity will be fully occupied with electrolyte at the end of this process step. The electrode wettability strongly depends on the contact angle between the electrolyte and the electrode, the electrode microstructure characterized by its porosity, pore network and tortuosity factor, the electrolyte viscosity and density. Computational fluid dynamics approaches such as the Lattice Boltzmann Method can provide relevant information of the filling process, yet these approaches come with significant computational cost. The use of machine learning techniques can provide surrogate models for the optimization of this multi-parameter process that depends on both chemical and physical properties. Within this context, we propose a general workflow for realizing this objective and provide detailed simulation-based experiments. These physics-informed surrogate models open the path to tractable, rapid solutions of parameter identification and design optimization problems. They also provide a general workflow for applications on other optimal battery material design problems.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42408351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

One year operation of an anion exchange membrane water electrolyzer utilizing Aemion+® membrane: Minimal degradation, low H2 crossover and high efficiency 使用Aemion+®膜的阴离子交换膜水电解槽运行一年：最小降解、低H2交叉和高效

IF 4.5

Journal of Power Sources Advances Pub Date : 2023-01-01 DOI: 10.1016/j.powera.2023.100109

Marta Moreno-González , Peter Mardle , Shan Zhu , Bobak Gholamkhass , Scot Jones , Nathan Chen , Benjamin Britton , Steven Holdcroft

引用次数: 11

X-ray absorption spectromicroscopy gives access to Li1+xAlxGe2−x(PO4)3 (LAGP) local degradation at the anode-electrolyte interface x射线吸收光谱显微镜可以在阳极-电解质界面处获得Li1+xAlxGe2−x(PO4)3 (LAGP)的局部降解

IF 4.5

Journal of Power Sources Advances Pub Date : 2022-11-01 DOI: 10.1016/j.powera.2022.100106

Majid Kazemian , Maya Kiskinova , Benedetto Bozzini

{"title":"X-ray absorption spectromicroscopy gives access to Li1+xAlxGe2−x(PO4)3 (LAGP) local degradation at the anode-electrolyte interface","authors":"Majid Kazemian , Maya Kiskinova , Benedetto Bozzini","doi":"10.1016/j.powera.2022.100106","DOIUrl":"10.1016/j.powera.2022.100106","url":null,"abstract":"<div><p>Batteries with inorganic solid-state electrolytes (ISSE) are attracting notable interest for next-generation systems implementing Lithium (Li) metal anodes, in view of achieving higher energy densities combined with superior safety. Notwithstanding extensive research and development work, this technology is not yet ready for industrial implementation, one of the key challenges being the stability of ISSEs, chiefly at the anodic interface. This work attacks this issue for the specific case of the LAGP/Li (Lithium Aluminium Germanium Phosphate/Lithium) interface with a micro-spectroscopic approach centred on <em>post mortem</em> Scanning Transmission X-ray Microscopy (STXM) of intact LMO/LAGP/Li thin-film batteries, microfabricated in discharged state. Pristine and cycled cells were mapped to pinpoint morphochemical changes, induced by electrochemical ageing. The evidenced shape changes, corresponding to mechanical damaging of the solid/solid electrodic interfaces correlate with LAGP decomposition at the anode, leading to reduction of Ge, whereas the chemical state at the cathodic interface is preserved. Thanks to its submicron spacial resolution, the STXM at the Ge L-edge and O K-edge spectra allowed to assess the highly localized nature of the chemical transformation of LAGP and its correlation with the formation of Li outgrowth features.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666248522000245/pdfft?md5=d3c27cf428d85d9d5a4df5b0021104c7&pid=1-s2.0-S2666248522000245-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46528837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A calorimetric approach to fast entropy-variations extraction for lithium-ion batteries using optimized galvanostatic intermittent titration technique 基于优化恒流间歇滴定技术的锂离子电池熵变快速提取热法研究

IF 4.5

Journal of Power Sources Advances Pub Date : 2022-08-01 DOI: 10.1016/j.powera.2022.100097

Abdul Muiz Ahmad, Guillaume Thenaisie, Sang-Gug Lee

{"title":"A calorimetric approach to fast entropy-variations extraction for lithium-ion batteries using optimized galvanostatic intermittent titration technique","authors":"Abdul Muiz Ahmad, Guillaume Thenaisie, Sang-Gug Lee","doi":"10.1016/j.powera.2022.100097","DOIUrl":"https://doi.org/10.1016/j.powera.2022.100097","url":null,"abstract":"<div><p>A fast entropy-variations (Δ<em>S</em>) extraction method has been proposed based on calorimetry, which determines the heat associated with Δ<em>S</em> by analyzing the electro-thermal response of a battery to a sequence of constant current pulses, i.e., the galvanostatic intermittent titration technique (GITT). The rest times in GITT are reduced by only considering limited relaxation of the ionic concentration gradients inside the battery after the current interruptions while completely ignoring the thermal equilibrium conditions inside the calorimeter. The resulting thermal signal of the battery is analyzed using an algorithm that adopts exponential regression to characterize the generated heat energy corresponding to each current pulse. Additionally, the polarization heat inside the battery is investigated by taking into account the initial presence of the concentration gradients when a current pulse is applied. Thus, the optimized rest times between the successive current pulses can reduce the measurement time manyfold compared to the previously reported methods, which require the battery to reach both electrochemical and thermal equilibriums. This work shows that the Δ<em>S</em> profiles of a 1 Ah NMC811/graphite pouch cell with 2.5% state of charge (SOC) resolution can be extracted at least three times faster than the method with unoptimized rest times, in a highly repeatable manner.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666248522000154/pdfft?md5=c3257471c3f143efc6d469f922f066e9&pid=1-s2.0-S2666248522000154-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136974976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of reliable resistance values for electrical double-layer capacitors 双层电容器可靠电阻值的测定

IF 4.5

Journal of Power Sources Advances Pub Date : 2022-08-01 DOI: 10.1016/j.powera.2022.100098

Lukas Köps , Pietro Zaccagnini , Candido Fabrizio Pirri , Andrea Balducci

引用次数: 0

Acceleration of through-plane water removal in polymer electrolyte fuel cell by channel hydrophilization and electrode perforation 通道亲水性和电极穿孔加速聚合物电解质燃料电池的通平面除水

IF 4.5

Journal of Power Sources Advances Pub Date : 2022-08-01 DOI: 10.1016/j.powera.2022.100102

Kosuke Nishida , Yudai Kono , Ryoichi Funaoka , Tatsuki Furukawa

{"title":"Acceleration of through-plane water removal in polymer electrolyte fuel cell by channel hydrophilization and electrode perforation","authors":"Kosuke Nishida , Yudai Kono , Ryoichi Funaoka , Tatsuki Furukawa","doi":"10.1016/j.powera.2022.100102","DOIUrl":"10.1016/j.powera.2022.100102","url":null,"abstract":"<div><p>To alleviate water flooding in cathode electrodes of polymer electrolyte fuel cells (PEFCs), it is essential to design the optimum channel/electrode structure for rapid water removal. This study presented a novel hybrid structure with the channel hydrophilization and electrode perforation for accelerating the through-plane water discharge and demonstrated the effect of its structure on the water transports in the cathode channel and gas diffusion layer (GDL) of a working PEFC with optical and X-ray imaging. The results revealed that the hydrophilization of the channel walls encourages the through-plane water suction form the GDL to the channel. Furthermore, the electrode perforation promotes the in-plane water discharge from the fine porous media to the large penetration grooves and holes. The synergistic effect of these two water transports in the hybrid structure effectively alleviates the flooding in the porous layers and enhances the oxygen diffusibility, resulting in significant improvement of the cell performance.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666248522000208/pdfft?md5=5e118c01fed9a2bf192947514e4f937d&pid=1-s2.0-S2666248522000208-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41698249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1