Evaluation of Li2O as an efficient sintering aid for gadolinia-doped ceria electrolyte for solid oxide fuel cells

Zhu, Tenglong; Lin, Ye; Yang, Zhibin; Su, Dong; Ma, Shuguo; Han, Min−Koo; Chen, Fanglin

doi:10.1016/j.jpowsour.2014.03.010

Cited by 77 publications

(51 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results suggest that the Li 2 O or Li 2 O 2 will fully evaporate aer 1000 C. As reported by Zhu et al, 19 the high vapor pressure of Li 2 O (e.g. 1.09 Â 10 À8 bar) conrms that the Li 2 O can be developed as a non-residual sintering additive.…”

Section: Thermal Decompositions Of Lino 3 and Li-cgo Powderssupporting

confidence: 76%

“…They were then characterized in term of microstructure and electrical properties. The calcination temperature could vary from 130 to 600 C. 13,16,18,19 In our previous study, the NiO-CGO/Li-CGO dual-layer hollow ber precursors was cosintered at 1150 C, 20 in which the preparation of Li-CGO powders was adopted from Nicholas 16 prior to the deposition of electrolyte layer by brush painting.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

et al. 2015

View full text Add to dashboard Cite

The incorporation of lithium oxide (Li 2 O) as a sintering additive has specific advantages for electrolyte membrane fabrication. However, the viability of the sintering additive to be implemented in a phase inversion technique is still ambiguous. In this first attempt, lithium was doped into a gadolinium-doped ceria (CGO) crystal structure using the metal nitrate doping method and calcined at four different temperatures, i.e. 140, 300, 500 and 700 C. The prepared Li-doped CGO (Li-CGO) powders were analyzed by thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), N 2 adsorption/desorption, and Fourier-transform infrared (FTIR). Primary results demonstrate that the calcination temperature of the Li-CGO influences the condition of the electrolyte suspension. Li-CGO calcined at 700 C (D-700), as compared with other Li-CGO, possessed a strong interaction between the Li and CGO. The D-700 was then incorporated into the electrolyte flat sheet membrane which was prepared by a phase inversion technique. The membrane was then sintered at different sintering temperatures from 1350 C to 1450 C. In comparison with the unmodified CGO, the morphological results suggest that the Li 2 O can remarkably promote the densification of CGO at a lower sintering temperature (1400 C). These findings help to promote the use of sintering additives in a ceriabased electrolyte suspension specifically for the phase inversion technique.

show abstract

Section: Thermal Decompositions Of Lino 3 and Li-cgo Powderssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

et al. 2015

View full text Add to dashboard Cite

show abstract

“…No observable secondary phases for the Li 2 O-GDC sample were found. It is noted that the highest intensity diffraction peak shifted to higher angle as well as in our prior work [23]. This is probably due to the fact that diffusion of Li into the GDC lattice.…”

Section: Phase Structure and Chemical Compatibilitysupporting

confidence: 74%

“…Therefore, the future work will be focusing on decreasing the thickness of the GDC electrolyte and increasing the conductivity of SFM-GDC anode supports. In our previous work, we found that Li doping could increase the conductivity of electrolyte [23]. Therefore, theoretically, the ohmic resistance of Li-doped single cell will be further lower than the Li-free single cell.…”

Section: Cell Performance and Sulfur Tolerance Stabilitymentioning

confidence: 96%

See 1 more Smart Citation

Low temperature co-sintering of Sr2Fe1.5Mo0.5O6−δ–Gd0.1Ce0.9O2−δ anode-supported solid oxide fuel cells with Li2O–Gd0.1Ce0.9O2−δ electrolyte

Yang

Chen

et al. 2015

Journal of Power Sources

Self Cite

View full text Add to dashboard Cite

Assessment of processing route on the performance of ceria‐based composites

et al. 2021

View full text Add to dashboard Cite

Gd-doped ceria (GDC)-based composites, including a eutectic mixture of lithium and sodium carbonate (NLC) as second phase, were prepared using several processing routes, namely chemical synthesis, co-firing of both phases, or impregnation of a presintered porous matrix. LiAlO 2 -based composites were also prepared and used as reference. The structural, microstructural, and electrical properties (impedance spectroscopy in air, up to 700 C) of these materials were assessed in detail. A limited set of compositions was also used in measurements of total electrical conductivity at different oxygen partial pressures (from 0.21 to <10 −25 atm), in the 600 C to 700 C range. The results obtained confirmed the enormous impact of the processing route on the percolation of the ceramic phase. In the exploited range of operating conditions, GDC-NLC composites prepared by infiltration of molten carbonates within a mechanically robust ceramic matrix exhibit a high total ionic conductivity strongly influenced by the contribution of the molten salt while the ceramic phase is decisive in the appearance of a significant component of electronic conductivity under reducing conditions.

show abstract

Evaluation of Li2O as an efficient sintering aid for gadolinia-doped ceria electrolyte for solid oxide fuel cells

Cited by 77 publications

References 28 publications

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

Low temperature co-sintering of Sr2Fe1.5Mo0.5O6−δ–Gd0.1Ce0.9O2−δ anode-supported solid oxide fuel cells with Li2O–Gd0.1Ce0.9O2−δ electrolyte

Assessment of processing route on the performance of ceria‐based composites

Contact Info

Product

Resources

About