Journal of Power Sources Advances最新文献_第10页

Atomic-scale studies of garnet-type Mg3Fe2Si3O12: Defect chemistry, diffusion and dopant properties 石榴石型Mg3Fe2Si3O12的原子尺度研究:缺陷化学、扩散和掺杂性能

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-06-01 DOI: 10.1016/j.powera.2020.100016

Navaratnarajah Kuganathan , Alexander Chroneos

{"title":"Atomic-scale studies of garnet-type Mg3Fe2Si3O12: Defect chemistry, diffusion and dopant properties","authors":"Navaratnarajah Kuganathan , Alexander Chroneos","doi":"10.1016/j.powera.2020.100016","DOIUrl":"10.1016/j.powera.2020.100016","url":null,"abstract":"<div><p>Materials with low cost, environmentally benign, high structural stability and high Mg content are of considerable interest for the construction of rechargeable Mg-ion batteries. In the present study, atomistic simulations are used to provide insights into defect and diffusion properties of garnet type Mg<sub>3</sub>Fe<sub>2</sub>Si<sub>3</sub>O<sub>12</sub>. Calculations reveal that the Mg–Fe anti-site defect cluster (0.44 eV/defect) is the lowest energy intrinsic defect process. Three dimensional Mg-ion migration pathway with the activation energy of 2.19 eV suggests that Mg-ion diffusion in this material is slow. Favourable isovalent dopants are found to be Mn<sup>2+</sup>, Ga<sup>3+</sup> and Ge<sup>4+</sup> on the Mg, Fe and Si sites respectively. While the formation of Mg interstitials required for the capacity is facilitated by Al doping on the Si site, Mg vacancies needed for the vacancy assisted Mg-ion diffusion are enhanced by Ge doping on the Fe site. The electronic structures of favourable dopants are calculated and discussed using density functional theory.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.powera.2020.100016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"96830021","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: 2

Highly stable metal halide perovskite microcube anodes for lithium-air batteries 用于锂空气电池的高度稳定的金属卤化物钙钛矿微立方阳极

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-06-01 DOI: 10.1016/j.powera.2020.100015

Athanasia Kostopoulou , Dimitra Vernardou , Dimitra Makri , Konstantinos Brintakis , Kyriaki Savva , Emmanuel Stratakis

{"title":"Highly stable metal halide perovskite microcube anodes for lithium-air batteries","authors":"Athanasia Kostopoulou , Dimitra Vernardou , Dimitra Makri , Konstantinos Brintakis , Kyriaki Savva , Emmanuel Stratakis","doi":"10.1016/j.powera.2020.100015","DOIUrl":"10.1016/j.powera.2020.100015","url":null,"abstract":"<div><p>Metal halide perovskites have been recently proposed as hopeful materials for energy storage applications. Besides, the quite important electrochemical characteristics of these materials, all the perovskite-based anodes are synthesized at high temperatures (90–150 °C) and with reaction durations of the order of tens of hours. In this work, it has been particularly shown that the direct growth of all-inorganic, metal halide microcrystals free of ligands, provides high-performance and stable electrodes for Li-air batteries. We describe a very simple and rapid method to synthesize well-crystalline and ultra-stable, at both ambient and aqueous conditions, CsPbBr<sub>3</sub> microcubes, exhibiting prominent electrochemical performance. In particular, it is shown that during the successive scans in which the Li-ions intercalate and deintercalate, the microcubes-based anodes showed a high specific capacity of 549 mAh·g<sup>−1</sup> and operation durability up to 1500 cycles. The large interfacial area between the perovskite electroactive material and the electrolyte along with the increase of the active sites on the exposed microcubes facets favor the Li-ions intercalation. It is concluded that the anodes presented here demonstrate the best electrochemical features among the nano- and microparticulate lead halide perovskite anodes used for Li-air batteries, to date.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.powera.2020.100015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54919075","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: 17

Evaluation of counter and reference electrodes for the investigation of Ca battery materials 研究钙电池材料的反电极和参比电极的评价

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-04-01 DOI: 10.1016/j.powera.2020.100008

Xu Liu , Giuseppe Antonio Elia , Stefano Passerini

引用次数: 10

Ni/NiFe2 dual-layer coating for SOFC steel interconnects application SOFC钢互连用Ni/NiFe2双层涂层

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-04-01 DOI: 10.1016/j.powera.2020.100011

Qingqing Zhao, Shujiang Geng, Xingye Gao, Gang Chen, Fuhui Wang

引用次数: 11

A rapid mechanical durability test for reinforced fuel cell membranes 增强燃料电池膜的快速机械耐久性试验

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-04-01 DOI: 10.1016/j.powera.2020.100010

Alireza Sadeghi Alavijeh , Sandeep Bhattacharya , Owen Thomas , Carmen Chuy , Erik Kjeang

引用次数: 3

Efficiency analysis of 50 kWe SOFC systems fueled with biogas from waste water 以废水沼气为燃料的50kwe SOFC系统效率分析

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-04-01 DOI: 10.1016/j.powera.2020.100009

Hendrik Langnickel , Markus Rautanen , Marta Gandiglio , Massimo Santarelli , Tuomas Hakala , Marco Acri , Jari Kiviaho

{"title":"Efficiency analysis of 50 kWe SOFC systems fueled with biogas from waste water","authors":"Hendrik Langnickel , Markus Rautanen , Marta Gandiglio , Massimo Santarelli , Tuomas Hakala , Marco Acri , Jari Kiviaho","doi":"10.1016/j.powera.2020.100009","DOIUrl":"10.1016/j.powera.2020.100009","url":null,"abstract":"<div><p>Solid oxide fuel cell systems (SOFCs) are able to convert biogas from e.g. waste water plants highly efficiently into electricity and heat. An efficiency study of industrial sized solid oxide fuel cell systems installed at a waste water treatment plant is presented. The site consist of a biogas cleaning unit, two Convion C50 SOFC systems and a heat recovery section. The electric and total efficiencies of the systems are analyzed as a function of the electric net power output. The two systems achieved consistently high electric (50–55%) and total (80–90%) efficiencies in an electric net power output range between 25 kW and 55 kW. The study also shows that the high system efficiencies are independent of the CH<sub>4</sub> content in the biogas. The results indicate that fuel cell systems are able to perform power modulation according to the power demand, while achieving constant high efficiencies. This is a clear benefit in comparison to micro turbines and combustion engines which are normally used for converting biogas into electricity and heat.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.powera.2020.100009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"104216599","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: 17

Numerical simulation of mass transfer enhancement in liquid metal batteries by means of electro-vortex flow 电涡流增强液态金属电池传质的数值模拟

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-02-01 DOI: 10.1016/j.powera.2020.100004

Norbert Weber , Michael Nimtz , Paolo Personnettaz , Tom Weier , Donald Sadoway

引用次数: 21

Effect of PEM fuel cell porous media compression on in-plane transport phenomena PEM燃料电池多孔介质压缩对面内输运现象的影响

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-02-01 DOI: 10.1016/j.powera.2020.100001

Mehdi Mortazavi , Anthony D. Santamaria , Vedang Chauhan , Jingru Z. Benner , Mahbod Heidari , Ezequiel F. Médici

{"title":"Effect of PEM fuel cell porous media compression on in-plane transport phenomena","authors":"Mehdi Mortazavi , Anthony D. Santamaria , Vedang Chauhan , Jingru Z. Benner , Mahbod Heidari , Ezequiel F. Médici","doi":"10.1016/j.powera.2020.100001","DOIUrl":"10.1016/j.powera.2020.100001","url":null,"abstract":"<div><p>Liquid-gas two-phase flow in the gas diffusion layer (GDL) of proton exchange membrane fuel cells is investigated using an ex-situ experimental setup. The mass transport phenomena is investigated in carbon paper and carbon cloth GDLs and at different compressions. Water percolation within the plane of the GDL is visualized with a CCD camera while its injection pressure is measured. Similarly, air percolation within the plane of GDL samples which were initially saturated with water is investigated. Experiments are conducted for the three flow regimes of stable displacement, capillary fingering, and viscous fingering. Images are analyzed to obtain the normalized wetted area. It is observed that while the GDL compression directly affects normalized wetted area for stable displacement and viscous fingering flow regimes, it has no impact on this parameter for capillary fingering flow regime. For stable displacement flow regime and for both carbon paper and carbon cloth samples, water percolation pressure increases with GDL compression. However, the water percolation pressure data obtained for capillary fingering flow regime does not suggest any discernible trend as a function of GDL compression. The findings in this study can be used to validate percolation models proposed by different schemes such as pore-network models.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.powera.2020.100001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"100661901","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: 24

Catalytically graphitized freestanding carbon foams for 3D Li-ion microbatteries 用于3D锂离子微电池的催化石墨化独立碳泡沫

IF 4.5

Journal of Power Sources Advances Pub Date : 2020-02-01 DOI: 10.1016/j.powera.2020.100002

Antonia Kotronia , Habtom Desta Asfaw , Cheuk-Wai Tai , Kristina Edström , Daniel Brandell

{"title":"Catalytically graphitized freestanding carbon foams for 3D Li-ion microbatteries","authors":"Antonia Kotronia , Habtom Desta Asfaw , Cheuk-Wai Tai , Kristina Edström , Daniel Brandell","doi":"10.1016/j.powera.2020.100002","DOIUrl":"10.1016/j.powera.2020.100002","url":null,"abstract":"<div><p>A long-range graphitic ordering in carbon anodes is desirable since it facilitates Li<sup>+</sup> transport within the structure and minimizes irreversible capacity loss. This is of vital concern in porous carbon electrodes that exhibit high surface areas and porosity, and are used in 3D microbatteries. To date, it remains a challenge to graphitize carbon structures with extensive microporosity, since the two properties are considered to be mutually exclusive. In this article, carbon foams with enhanced graphitic ordering are successfully synthesized, while maintaining their bicontinuous porous microstructures. The carbon foams are synthesized from high internal phase emulsion-templated polymers, carbonized at 1000 °C and subsequently graphitized at 2200 °C. The key to enhancing the graphitization of the bespoke carbon foams is the incorporation of Ca- and Mg-based salts at early stages in the synthesis. The carbon foams graphitized in the presence of these salts exhibit higher gravimetric capacities when cycled at a specific current of 10 mA g<sup>−1</sup> (140 mAh g<sup>−1</sup>) compared to a reference foam (105 mAh g<sup>−1</sup>), which amounts to 33% increase.</p></div>","PeriodicalId":34318,"journal":{"name":"Journal of Power Sources Advances","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.powera.2020.100002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46194780","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: 5