Liping Zhang, R. Ljazouli, P. Lefaucheux, T. Tillocher, R. Dussart, Y. Mankelevich, J. D. Marneffe, S. Gendt, M. Baklanov
{"title":"Damage Free Cryogenic Etching of a Porous Organosilica Ultralow-k Film","authors":"Liping Zhang, R. Ljazouli, P. Lefaucheux, T. Tillocher, R. Dussart, Y. Mankelevich, J. D. Marneffe, S. Gendt, M. Baklanov","doi":"10.1149/2.007302SSL","DOIUrl":"https://doi.org/10.1149/2.007302SSL","url":null,"abstract":"","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82711142","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}
We report the fabrication and evaluation of a ceramic-anode supported button cell LSCM-SDC/SDC/PBSC (thickness 400 μ m/ 20 μ m/20 μ m). The anode/electrolyte assembly LSCM-SDC/SDC was co-fired at low temperature of 1250 ◦ C, where a slight amount of CuO was mixed with LSCM. The CuO (20.3 wt%) were impregnated into the porous substrate to enhance current collecting effect. The cell exhibited power density of 596 mWcm − 2 and 381 mWcm − 2 at 700 ◦ C with wet hydrogen and methane as the fuel respectively, where the silver paste was used as current collectors, the highest performance up to date for the cells with metal oxide anodes at this temperature.
{"title":"A Ceramic-Anode Supported Low Temperature Solid Oxide Fuel Cell","authors":"Hanping Ding, J. Ge, Xingjian Xue","doi":"10.1149/2.019206ESL","DOIUrl":"https://doi.org/10.1149/2.019206ESL","url":null,"abstract":"We report the fabrication and evaluation of a ceramic-anode supported button cell LSCM-SDC/SDC/PBSC (thickness 400 μ m/ 20 μ m/20 μ m). The anode/electrolyte assembly LSCM-SDC/SDC was co-fired at low temperature of 1250 ◦ C, where a slight amount of CuO was mixed with LSCM. The CuO (20.3 wt%) were impregnated into the porous substrate to enhance current collecting effect. The cell exhibited power density of 596 mWcm − 2 and 381 mWcm − 2 at 700 ◦ C with wet hydrogen and methane as the fuel respectively, where the silver paste was used as current collectors, the highest performance up to date for the cells with metal oxide anodes at this temperature.","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80862144","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}
We use electrochemical impedance spectroscopy (EIS) to monitor the resistance increases associated with Li-ion batteries during and after overcharge. EIS is commonly used to measure the resistance within a Li-ion cell and can show changes in resistance behavior originating from chemical and electrochemical reactions occurring within bulk electrodes, electrolyte, and along electrode/electrolyte interfaces [1]. The physical processes in electrochemical cells have different time constants or effective capacitances, which result in different frequency responses [2]. We report the impedance characteristics for overcharged batteries are markedly different from those of the healthy batteries. At 500 Hz, the results are independent of state of charge for healthy batteries, and grossly different for overcharged batteries [3]. The changes at 500 Hz are not coincidental, as this frequency responsive to the cell passivation layers that form upon overcharge. From the results, we recommend a singlepoint impedance-based diagnostic tool for monitoring battery health. Commercial Li-ion prismatic cells (Full River 10 to 300 mAh) are used for these experiments. EIS measurements were collected using a Solartron SI 1260 impedance gain-phase analyzer driven by an EG&G PAR263A potentiostat. Impedance data were collected under open circuit conditions using a ±10 mV amplitude perturbation between 50 kHz and 10 mHz at various voltages during charge, overcharge and discharge. The upper limit for the charge voltage ranged from 4.2 V to 5.0 V, while the discharge voltage cutoff was held constant at 2.8 V throughout all experiments. EIS data were collected and analyzed by ZPlot and ZView software packages (Scribner Associates Inc.). The batteries were charged and discharged at constant 1C rates (30 mA) at approximately 23°C. Repeated charge/discharge (2.8–4.2 V) and overcharge/discharge (2.8 – 4.4, 4.6, 4.8, 5.0 V) data were measured using a Maccor Series 4300 battery tester. Overcharged LiCoO2|C cells have drastically different impedance spectra as compared to properly operated ones (charged between 2.8 – 4.2 V). A soft overcharge to 4.4 V results in small changes in the impedance spectrum compared to the recommended 4.2 V upper charging limit. When overcharged above 4.4 V, the impedance characteristics change dramatically. The shapes of the impedance spectra irreversibly change upon discharge after a severe 5.0 V overcharge and no longer resemble the impedance spectra measured for the battery charged to 4.2 V (see reference 3). This irreversibility in the impedance response for overcharged Li-ion cells is most pronounced at 500 Hz (Fig 1). A single overcharge to 4.6 V causes the battery impedance at 500 Hz to drop significantly, reflecting a change in the structure of the electrode passivation layers. With further overcharge cycles, the battery impedance at 500 Hz increases, reflecting an increase in the cell resistance, and the first steps toward an overheating battery. Th
{"title":"Impedance Diagnostic for Overcharged Lithium-Ion Batteries","authors":"C. Love, K. Swider-Lyons","doi":"10.1149/2.014204ESL","DOIUrl":"https://doi.org/10.1149/2.014204ESL","url":null,"abstract":"We use electrochemical impedance spectroscopy (EIS) to monitor the resistance increases associated with Li-ion batteries during and after overcharge. EIS is commonly used to measure the resistance within a Li-ion cell and can show changes in resistance behavior originating from chemical and electrochemical reactions occurring within bulk electrodes, electrolyte, and along electrode/electrolyte interfaces [1]. The physical processes in electrochemical cells have different time constants or effective capacitances, which result in different frequency responses [2]. We report the impedance characteristics for overcharged batteries are markedly different from those of the healthy batteries. At 500 Hz, the results are independent of state of charge for healthy batteries, and grossly different for overcharged batteries [3]. The changes at 500 Hz are not coincidental, as this frequency responsive to the cell passivation layers that form upon overcharge. From the results, we recommend a singlepoint impedance-based diagnostic tool for monitoring battery health. Commercial Li-ion prismatic cells (Full River 10 to 300 mAh) are used for these experiments. EIS measurements were collected using a Solartron SI 1260 impedance gain-phase analyzer driven by an EG&G PAR263A potentiostat. Impedance data were collected under open circuit conditions using a ±10 mV amplitude perturbation between 50 kHz and 10 mHz at various voltages during charge, overcharge and discharge. The upper limit for the charge voltage ranged from 4.2 V to 5.0 V, while the discharge voltage cutoff was held constant at 2.8 V throughout all experiments. EIS data were collected and analyzed by ZPlot and ZView software packages (Scribner Associates Inc.). The batteries were charged and discharged at constant 1C rates (30 mA) at approximately 23°C. Repeated charge/discharge (2.8–4.2 V) and overcharge/discharge (2.8 – 4.4, 4.6, 4.8, 5.0 V) data were measured using a Maccor Series 4300 battery tester. Overcharged LiCoO2|C cells have drastically different impedance spectra as compared to properly operated ones (charged between 2.8 – 4.2 V). A soft overcharge to 4.4 V results in small changes in the impedance spectrum compared to the recommended 4.2 V upper charging limit. When overcharged above 4.4 V, the impedance characteristics change dramatically. The shapes of the impedance spectra irreversibly change upon discharge after a severe 5.0 V overcharge and no longer resemble the impedance spectra measured for the battery charged to 4.2 V (see reference 3). This irreversibility in the impedance response for overcharged Li-ion cells is most pronounced at 500 Hz (Fig 1). A single overcharge to 4.6 V causes the battery impedance at 500 Hz to drop significantly, reflecting a change in the structure of the electrode passivation layers. With further overcharge cycles, the battery impedance at 500 Hz increases, reflecting an increase in the cell resistance, and the first steps toward an overheating battery. Th","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79025876","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}
In this work, we demonstrate a low temperature polysilicon nanowire fabrication process using amorphous silicon deposition over an oxide pillar, anisotropic reactive ion etch and metal-induced lateral crystallization (MILC). The fabricated nanowires are rectangular, with a width and height of around 100 nm. MILC is successfully achieved at temperatures down to 450oC, making the process compatible with glass substrates and hence suitable for low cost, disposable biosensors. Crystallisation lengths of 4.1 µm and 0.8 µm are obtained for 15 hour anneals at 480oC and 450oC, respectively.
{"title":"Rectangular Polysilicon Nanowires by Top-Down Lithography, Dry Etch and Metal-Induced Lateral Crystallization","authors":"K. Sun, M. Hakim, P. Ashburn","doi":"10.1149/2.011203ESL","DOIUrl":"https://doi.org/10.1149/2.011203ESL","url":null,"abstract":"In this work, we demonstrate a low temperature polysilicon nanowire fabrication process using amorphous silicon deposition over an oxide pillar, anisotropic reactive ion etch and metal-induced lateral crystallization (MILC). The fabricated nanowires are rectangular, with a width and height of around 100 nm. MILC is successfully achieved at temperatures down to 450oC, making the process compatible with glass substrates and hence suitable for low cost, disposable biosensors. Crystallisation lengths of 4.1 µm and 0.8 µm are obtained for 15 hour anneals at 480oC and 450oC, respectively.","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73377125","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}
Sang-Un Byun, Hong-Gyu Park, Kyung-Il Lee, B. Lim, Hyungtaek Lee, Dae‐Shik Seo
{"title":"Application of Electrohydrodynamic Printing for Liquid Crystal Alignment","authors":"Sang-Un Byun, Hong-Gyu Park, Kyung-Il Lee, B. Lim, Hyungtaek Lee, Dae‐Shik Seo","doi":"10.1149/2.029206ESL","DOIUrl":"https://doi.org/10.1149/2.029206ESL","url":null,"abstract":"","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73730637","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}
DTU Orbit (31/12/2018) Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia The surface composition of sintered scandia and yttria co-stabilized zirconia was analyzed with x-ray photoelectron spectroscopy. The samples were sintered at 1300°C or 1500°C in flowing dry or moisturized air. It was found that Sc2O3 does not segregate to the surface, unlike the Y2O3 in yttria stabilized zirconia. The probable reason for this is that due to its size the Sc3+ ion fits better in the zirconia lattice than Y3+ does. The difference in surface composition may be the explanation for the observed increased tolerance toward sulfur of Ni-ScYSZ compared to Ni-YSZ cermets.
{"title":"Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia","authors":"K. V. Hansen, M. Mogensen","doi":"10.1149/2.003206ESL","DOIUrl":"https://doi.org/10.1149/2.003206ESL","url":null,"abstract":"DTU Orbit (31/12/2018) Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia The surface composition of sintered scandia and yttria co-stabilized zirconia was analyzed with x-ray photoelectron spectroscopy. The samples were sintered at 1300°C or 1500°C in flowing dry or moisturized air. It was found that Sc2O3 does not segregate to the surface, unlike the Y2O3 in yttria stabilized zirconia. The probable reason for this is that due to its size the Sc3+ ion fits better in the zirconia lattice than Y3+ does. The difference in surface composition may be the explanation for the observed increased tolerance toward sulfur of Ni-ScYSZ compared to Ni-YSZ cermets.","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74113092","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}
Jia Yang, Fang-yang Liu, Y. Lai, Jie Li, Ye-xiang Liu
{"title":"Photoelectrochemical Deposition of CuInSe2 Thin Films","authors":"Jia Yang, Fang-yang Liu, Y. Lai, Jie Li, Ye-xiang Liu","doi":"10.1149/2.007204ESL","DOIUrl":"https://doi.org/10.1149/2.007204ESL","url":null,"abstract":"","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86020797","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}
{"title":"Composite, Solvent-Casted Nafion Membranes for Vanadium Redox Flow Batteries","authors":"P. Trogadas, E. Pinot, T. Fuller","doi":"10.1149/2.004201ESL","DOIUrl":"https://doi.org/10.1149/2.004201ESL","url":null,"abstract":"","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86054371","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}
José M. García, J. A. Adame, Ricardo Cuenca Álvarez, F. J. López
{"title":"ZnO NW's Grown by Zn[TMHD]2 Precursor","authors":"José M. García, J. A. Adame, Ricardo Cuenca Álvarez, F. J. López","doi":"10.1149/2.007206ESL","DOIUrl":"https://doi.org/10.1149/2.007206ESL","url":null,"abstract":"","PeriodicalId":11627,"journal":{"name":"Electrochemical and Solid State Letters","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80280107","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}
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