The development of a carbon–air semi fuel cell

Pointon, Kevin D.; Lakeman, Barry; Irvine, John T. S.; Bradley, John L.; Jain, Sneh L.

doi:10.1016/j.jpowsour.2005.07.023

Cited by 95 publications

(55 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…based solid electrolytes [18,19] have been used in DCFCs. The latest development in DCFC technology is to utilize highly reactive carbon particulates dispersed in a molten carbonate electrolyte, which flows between the anode and cathode at high temperature [2,3,9,11,12].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of carbon fuels for direct carbon fuel cells

Zhu

Chen

et al. 2009

Journal of Power Sources

Self Cite

139

125

View full text Add to dashboard Cite

a b s t r a c tThe direct carbon fuel cell (DCFC) is a promising power-generation device that has much higher efficiency (80%) and less emissions than conventional coal-fired power plants. Two commercial carbons (activated carbon and carbon black) pre-treated with HNO 3 , HCl or air plasma are tested in a DCFC. The correlation between the surface properties and electrochemical performance of the carbon fuels is explored. The HNO 3 -treated carbon fuels have the highest electrochemical reactivity in the DCFC due to the largest degree of surface oxygen functional groups. The overall effect on changing the electrochemical reactivity of carbon fuels is in the order HNO 3 > air plasma ≈ HCl. Product gas analysis indicates that complete oxidation of carbon to CO 2 can be achieved at 600-700 • C.

show abstract

Section: Introductionmentioning

confidence: 99%

Surface modification of carbon fuels for direct carbon fuel cells

Zhu

Chen

et al. 2009

Journal of Power Sources

Self Cite

139

125

View full text Add to dashboard Cite

show abstract

“…Although this transfer can be accomplished in the gas phase using a CO-CO 2 redox couple, 3 the use of electrodes based on liquid metals and molten carbonates would offer improved fuel flexibility. [4][5][6][7][8][9] The majority of work in DCFC has used a mixture of moltencarbonate salts ͑e.g., Li 2 CO 3 + K 2 CO 3 + Na 2 CO 3 ͒ as the anode, using either a molten-carbonate or a yttria-stabilized zirconia ͑YSZ͒ electrolyte. 10 Although the mixed carbonate salts appear to be very good oxidizers and impressive performance levels have been achieved with this type of anode, molten carbonates are not electronically conductive so that a metallic current collector must be incorporated into the anode structure.…”

mentioning

confidence: 99%

A Comparison of Molten Sn and Bi for Solid Oxide Fuel Cell Anodes

Jayakumar

Lee

Hornés

et al. 2010

J. Electrochem. Soc.

View full text Add to dashboard Cite

Molten Sn and Bi were examined at 973 and 1073K for use as anodes in solid oxide fuel cells with yttria-stabilized zirconia (YSZ) electrolytes. Cells were operated under “battery” conditions, with dry He flow in the anode compartment, to characterize the electrochemical oxidation of the metals at the YSZ interface. For both metals, the open-circuit voltages (OCVs) were close to that expected based on their oxidation thermodynamics, ∼0.93V for Sn and ∼0.48V for Bi. With Sn, the cell performance degraded rapidly after the transfer of approximately 0.5–1.5C∕cm2 of charge due to the formation of a SnnormalO2 layer at the YSZ interface. At 973K , the anode impedance at OCV for freshly reduced Sn was approximately 3Ωcm2 but this increased to well over 250Ωcm2 after the transfer of 1.6C∕cm2 of charge. Following the transfer of 8.2C∕cm2 at 1073K , the formation of a 10μm thick SnnormalO2 layer was confirmed by scanning electron microscopy. With Bi, the OCV anode impedance at 973K was less than 0.25Ωcm2 and remained constant until essentially all of the Bi had been oxidized to normalBi2normalO3 . Some implications of these results for direct carbon fuel cells are discussed.

show abstract

“…Different types of fuel cells are studied in the energetic research field, but little attention has been paid to direct carbon fuel cells (DCFCs) despite the fact that the energy released upon the electrochemical oxidation of carbon to CO 2 (23,95 kWh/l) exceeds that of most other non-solid fuels (e.g. hydrogen, methane and diesel) (2) and also carbon materials are available from many sources (for example, coal, carbon obtained from biomass pyrolysis and plastic materials and hydrocarbon cracking).…”

Section: Introductionmentioning

confidence: 99%

Studies of current collection configurations and sealing for tubular hybrid-DCFC

Bonaccorso

Jiang

et al. 2016

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Direct Carbon Fuel Cells (DCFC) offer efficient conversion of coal or biomass derived carbons to electricity. A Hybrid Direct Carbon Fuel Cell (HDCFC) is a type of DCFCs that combines solid oxide cell geometry with a molten carbonate fuel cell electrode. This study focused on investigating different current collection configurations and sealant for tubular HDCFC concept. A HDCFC used a gadolinia doped ceria (GDC) or a YSZ as the electrolyte, in composites with NiO and LSM as the anode and the cathode, respectively. Three different current collection configurations of HDCFC were investigated by AC impedance in order to study the electrochemical phenomena that occur at the electrodes surface. The AC impedance results showed that both the surface area and the position of the current collector inside of the anode chamber affect drastically both the series resistance (R s ) and the polarisation resistance (R p ) values. The lowest total resistance (R tot ) was achieved on Configuration b with silver wire interwoven nickel mesh attached to the side of the anode wall by silver paste (R tot = 2.98 Ω) and while the highest R tot was achieved on the configuration c with silver wire interwoven nickel mesh inserted into the mixture of carbon and carbonate (R tot =149 Ω) . The leak test carried out on several sealants demonstrated that composite sealants of Toku P-24 paste and an alumina silicate disc produced a low degree of leaks due to both the high resistance to the carbonate mixture and high density sealing after curing compared to the ceramabond.

show abstract

The development of a carbon–air semi fuel cell

Cited by 95 publications

References 3 publications

Surface modification of carbon fuels for direct carbon fuel cells

Surface modification of carbon fuels for direct carbon fuel cells

A Comparison of Molten Sn and Bi for Solid Oxide Fuel Cell Anodes

Studies of current collection configurations and sealing for tubular hybrid-DCFC

Contact Info

Product

Resources

About