Fabrication and characteristics of porous Ni and NiO(Li) cathodes for MCFC

Parkt, Hyeoung-Ho; Jang, Chun-Il; Shin, Hyung‐Shik; Lee, Kyu-Taek

doi:10.1007/bf02705886

Cited by 8 publications

(11 citation statements)

References 3 publications

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“…Also, the Li 0.1 Ni 0.9 O peaks are narrow with smaller FWHM (full width at half maximum) compared to the NiO peaks. It confirms that the Li 0.1 Ni 0.9 O has attained a higher degree of crystallinity and larger crystallite size than the ex-situ oxidized NiO [30] .…”

Section: Structural Analysis On Oxidized Ni Current Collectorsmentioning

confidence: 52%

“…After the ex-situ oxidization, Ni phase coexists as a major phase along with NiO. It predicts that in the ex-situ process, oxidization occurs just on the surface where Ni is in contact with air; simply as NiO lamination over the Ni, without disturbing the bulk Ni metallic framework [30] . However, no impurity phase is observed, neither after the in-situ, nor after the ex-situ oxidization processes.…”

Section: Structural Analysis On Oxidized Ni Current Collectorsmentioning

confidence: 99%

“…It shows that no further lithiation/de-lithiation happened during the thermocell operation [34] . Therefore, the current collectors underwent only phase refinement due to lattice reorientation and change in the degree of crystallinity, such as the sintering effect [30] . The post SEM analysis ( Figs.…”

Section: Thermocell Measurements With Different Current Collectorsmentioning

confidence: 99%

“…However, a few mild pits are found on the surface, like delamination of the pre-made oxide layer [37] . The change in morphology and microstructure of the Ni on the in-situ oxidation process to form the Li 0.1 Ni 0.9 O could influence the dissolution [30] . The formation of a thick oxide layer, lithiation and intragranular voids may lead to volume expansion and structural weakness (stress and brittle) [19,37] .…”

Section: Thermocell Measurements With Different Current Collectorsmentioning

confidence: 99%

“…The formation of a thick oxide layer, lithiation and intragranular voids may lead to volume expansion and structural weakness (stress and brittle) [19,37] . Thus, a larger dimensional loss is experienced in the Li 0.1 Ni 0.9 O than the NiO current collectors [19,30] .…”

Section: Thermocell Measurements With Different Current Collectorsmentioning

confidence: 99%

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Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells

Kandhasamy

Haarberg

Kjelstrup³

et al. 2020

Journal of Energy Chemistry

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a b s t r a c tThermo-electrochemical cells with inexpensive molten carbonate electrolyte and (CO 2 |O 2 ) gas electrodes allow the possible conversion of high temperature waste heat from industrial processes into electricity. The cell containing eutectic (Li,Na) 2 CO 3 electrolyte with solid MgO dispersion delivers a large Seebeck coefficient of −1.7 mV/K. At present, the (CO 2 |O 2 ) gas electrodes use metallic gold as current collectors in order to avoid the formation of interfering oxide layers during operation. For further reduction in energy generation cost, the gold current collectors should be replaced with an inexpensive and stable alternative. In this study, the suitability of the (molten carbonate fuel cell) MCFC's nickel-based cathodes to operate the molten-carbonate thermo-electrochemical cell, was investigated. Ni current collectors were examined in two different states, as NiO and as lithiated NiO (Li x Ni 1 −x O). The NiO phase shows higher stability than the Li x Ni 1 −x O while the Seebeck coefficient remains above −1.2 mV/K.

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Section: Structural Analysis On Oxidized Ni Current Collectorsmentioning

confidence: 52%

Section: Structural Analysis On Oxidized Ni Current Collectorsmentioning

confidence: 99%

Section: Thermocell Measurements With Different Current Collectorsmentioning

confidence: 99%

Section: Thermocell Measurements With Different Current Collectorsmentioning

confidence: 99%

Section: Thermocell Measurements With Different Current Collectorsmentioning

confidence: 99%

See 3 more Smart Citations

Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells

Kandhasamy

Haarberg

Kjelstrup³

et al. 2020

Journal of Energy Chemistry

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Cardiovascular disease risk reduction in patients with diabetes - is clinical practice effective?

2000

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Objective To assess the 10‐year risk of a cardiovascular disease (CVD) event in a cohort of patients with diabetes, and to assess whether routine clinical practice can change this risk. Design A retrospective cohort study of 166 patients randomly selected from the database of a rural general hospital diabetes department. Method Using data on systolic blood pressure (SBP), total cholesterol and smoking status from 1995 and 1996, the 10‐year risk of a CVD event was estimated for each patient using the Framingham Heart Study Coronary Heart Disease Risk Prediction Chart. The parameters were assessed to see whether any change was achieved by routine clinical practice. Results No significant changes in SBP, total cholesterol or smoking habit were achieved. The mean 10‐year risk of a CVD event in 1995 and 1996 was 19.6 and 19.2% respectively (p=NS); 54% (1995) and 46% (1996) of patients had a 10‐year risk of greater than 20%, approximately equating to an annual risk of 2%. Conclusion CVD risk in a cohort of patients with diabetes is alarmingly high, and routine clinical practice did not result in an overall reduction. CVD risk estimation charts can be used to identify patients at high risk of CVD, and more effective strategies are required to lower this risk. Copyright © 2000 John Wiley & Sons, Ltd.

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Influence of carbonisation on selected engineering properties of carbon resin electrodes for electrochemical treatment of wastewater

Oke

2009

Can J Chem Eng

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In this study, effects of selected factors on selected properties of carbon resin electrodes (CRE) have been investigated. CRE were developed from used dry cells and resin using non-heat-treatment process. Selected properties (density, electrical resistance, microstructure, hygroscopy, stability moisture content, compressive and flexural strength) of the electrodes were monitored and effects of carbonisation temperature, carbon particle size, and compaction pressure on these properties were studied.The study revealed that the density of CRE was in the range of 1.33 to 1.59 g/cm 3 , compressive strength ranged from 36.56 to 43.81 MN/m 2 , flexural strength, moisture content, and swelling were in the range of 6.76 to 8.10 MN/m 2 , 0.84-0.93%, and 6.04-9.30%, respectively. In all cases electrical resistance and density of CRE decreased with increasing carbonisation temperature at various operational factors (particle size, compacting pressure, and percentage of the resin used). Also, it was revealed that carbonisation of CRE from 30 to 220 • C reduced specific electrical resistance and density from 1.85 to 1.29 × 10 −1 /cm and from 1.35 to 1.24 g/cm 3 , respectively, but carbonisation temperature had no significant effect on wetness, compressive and flexural strength, stability, and moisture content of the electrodes. Estimated costs revealed that cost of producing CRE was cheaper ($13.25/m) than that of heat-treated electrodes ($33.33/m).It was concluded that carbonisation temperature, particle size, compacting pressure, and percentage of the resin used are important factors in the development of CRE with lower specific electrical resistance.Dans la présenteétude, on a examiné les effets de facteurs choisis sur des propriétés choisies d'électrodes de résine de carbone (ERC). On a mis au point ces dernièresà partir de piles sèches usées et de résine au moyen d'un procédé sans traitement thermique. On a observé les propriétés sélectionnées (densité, résistanceélectrique, microstructure, hygrométrie, stabilité, teneur en humidité, résistanceà la compression et résistanceà la flexion) desélectrodes et on a examiné les effets de la température de carbonisation, la taille des particules de carbone et la pression de compactage sur ces propriétés. L'étude a révélé que la densité des ERC se situait dans la plage de 1,33 g/cm 3à 1,59 g/cm 3 , la pression de compactage variait de 36,56à 43,81 MN/m 2 et la résistanceà la flexion, la teneur en humidité et le gonflement variaient de 6,76à 8,10 MN/m 2 , 0,84à 0,93% et 6,04à 9,30% respectivement. Dans tous les cas, la résistanceélectrique et la densité des ERC diminuaient avec l'augmentation de la température de carbonisationà divers facteurs opérationnels (taille des particules, pression de compactage et pourcentage de résine utilisé). On aégalement noté que la carbonisation des ERC de 30à 220 • C réduisait la résistanceélectrique et la densité spécifiques de 1,85à 1,29 × 10 −1 /cm et de 1,35 g/cm 3à 1,24 g/cm 3 respectivement, mais la température de carbonisation n'a eu aucun ef...

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Fabrication and characteristics of porous Ni and NiO(Li) cathodes for MCFC

Cited by 8 publications

References 3 publications

Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells

Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells

Cardiovascular disease risk reduction in patients with diabetes - is clinical practice effective?

Influence of carbonisation on selected engineering properties of carbon resin electrodes for electrochemical treatment of wastewater

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