Industrial-grade rare-earth and perovskite oxide for high-performance electrolyte layer-free fuel cell

Chen, Xia; Wang, Baoyuan; Ma, Ying; Cai, Yixiao; Afzal, Muhammad; Liu, Yanyan; He, Yaning; Zhang, Wei; Dong, Wenjing; Li, Junjiao; Zhu, Bin

doi:10.1016/j.jpowsour.2015.12.086

Cited by 95 publications

(49 citation statements)

References 51 publications

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“…Theconductivity of the two samples increased,a long with the increase in temperature,a nd demonstrated at hermally activated process.T he conductivityo fL SCF-LCP with sodium silicate varied from 0.040 to 0.074 Scm À1 over at emperature range from 500 to 600 8C. [24] In comparison, LSCF-LCP without sodium silicate presented ah igher conductivityt han that with sodium silicate.T his may be due to silicon oxide being a component of the LSCF-LCP with sodium silicate;silicon dioxide is an insulator that can block electron transport. Although the introductionofs odium silicate binder resultsi n some SiO 2 formation, the total conductivityo ft he fuel cell membrane may be decreaseds omewhat, buti tm ay block some electronic conduction.…”

Section: Resultsmentioning

confidence: 91%

“…Such a mechanism has been widelyo bserved and reported in our previous works. [16,24,28,29] To better understand the underlying processes, electrochemical impedance spectroscopy( EIS) characterization of the cells at different temperatures was performed under air/ H 2 conditions in open-circuit mode,a ss hown in Figure 4. Thes cattered points in Figure 4a re the collected results, whereas the solid lines are the fitting patterns obtained by using an equivalentc ircuit mode of R s /R ct (CPE1)/R mt (CPE2).…”

Section: Resultsmentioning

confidence: 99%

“…[18][19][20][21][22][23] TheL SCF-LCP composite made from mixing industrial-grade rare-earth oxide andperovskite semiconductori sanewk ind of functional material with rather high ionic conductivity. [24][25][26][27]…”

Section: Introductionmentioning

confidence: 99%

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Thin‐Film Fuel Cells using a Sodium Silicate Binder with La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) and LaCePr Oxides (LCP) Membranes

et al. 2018

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Sodium silicate was used as a binder to prepare LaCePr oxides (LCP) and La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) thin films on a Ni0.8Co0.15Al0.05Li oxide ceramic substrate for the first time. The microstructure, morphology, and electrical properties of the LSCF–LCP thin films were characterized and investigated by using XRD, SEM, energy‐dispersive X‐ray spectroscopy, and electrochemical impedance spectroscopy. The film sintered at 600 °C presents promising density and has been successfully applied as the electrolyte membrane for solid‐oxide fuel cells (SOFCs). Such a device achieved a respectable electrochemical performance with an open‐circuit voltage of 1.04 V and a maximum power output of 545 mW cm−2 at 575 °C. These findings suggest that sodium silicate is a suitable binder for the preparation of dense thin‐film membranes for SOFCs. Moreover, the preparation technology based on sodium silicate eliminated degumming and high‐temperature sintering, which resulted in greatly simplifying the preparation process of the thin‐film fuel cell towards potential fuel cell commercialization.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

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Thin‐Film Fuel Cells using a Sodium Silicate Binder with La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) and LaCePr Oxides (LCP) Membranes

et al. 2018

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“…Typical semiconducting materials include Li-and Ni-based wide-bandgap oxides [5][6] [7][8] [10] [11] [12][13] [14][15] [16] and perovskites, such as La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) [17] [18] [19], Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) [20] and Pr 0.4 Sr 0.6 Co 0.2 Fe 0.7 Nb 0.1 O 3−δ [15]. The typical ionic conductors are based on doped ceria: GDC [5][7] [14], Sm-doped ceria (SDC) [6][10] [20] [21] [22], co-doped cerias [16] [17][18] [19] and mixtures of doped ceria and alkali carbonates [8] [11] [12] [13] [15][23] [24] have been reported. The doped ceria -alkali carbonate mixture has been reported widely to improve the ionic conductivity of the electrolyte in three-layer fuel cells [25] [26].…”

Section: Introductionmentioning

confidence: 99%

Carbonate dual-phase improves the ionic conductivity and performance of mixed ionic and semiconductor single-layer fuel cell

Jouttijärvi

Yao

Asghar

et al. 2019

Preprint

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A mixed ionic and semiconducting composite in a single-layer configuration has been shown to work as a fuel cell at a lower temperature (500-600 oC) than a traditional solid-oxide fuel cell. The performance of such single-layer fuel cell (SLFC) is often limited by high resistive losses. Here, an eutectic mixture of alkali-carbonates was added to SLFC to improve the ionic conductivity. The dualphase composite ionic conductor consisted of a ternary carbonate (sodium lithium potassium carbonate, NLKC) mixed with gadolinium-doped cerium oxide (GDC). Lithium nickel zinc oxide (LNZ) was used as the semiconducting material. The LNZ-GDC-NLKC SLFC reached a high power density, 582 mW/cm2 (conductivity 0.22 S/cm) at 600 °C, which is more than 30 times better than without the carbonate. The best results were obtained with the ternary carbonate which decreased the ohmic losses of the cell by more than 95%, whereas a binary carbonate (sodium lithium carbonate, NLC) showed a lower conductivity and performance (243 mW/cm2, 0.17 S/cm at 600°C). It is concluded that adding carbonates to the LNZ-GDC will improve the ionic conductivity and positively contribute to the cell performance. These results will help to design better-performing SLFCs in the future and highlight the potential of SLFCs as a candidate for future electricity generation.

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“…To address this challenge, an efficacious approach based on semiconducting ionic conductors has been proposed very recently to replace the conventional electrolyte YSZ and SDC [9,10,11,12,13,14,15]. The developed materials have exhibited extraordinarily high ionic conductivity superior to those of YSZ and SDC, showing tremendous potential as membrane layer in LT-SOFCs [14,15].…”

Section: Introductionmentioning

confidence: 99%

Study on Zinc Oxide-Based Electrolytes in Low-Temperature Solid Oxide Fuel Cells

et al. 2017

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Semiconducting-ionic conductors have been recently described as excellent electrolyte membranes for low-temperature operation solid oxide fuel cells (LT-SOFCs). In the present work, two new functional materials based on zinc oxide (ZnO)—a legacy material in semiconductors but exceptionally novel to solid state ionics—are developed as membranes in SOFCs for the first time. The proposed ZnO and ZnO-LCP (La/Pr doped CeO2) electrolytes are respectively sandwiched between two Ni0.8Co0.15Al0.05Li-oxide (NCAL) electrodes to construct fuel cell devices. The assembled ZnO fuel cell demonstrates encouraging power outputs of 158–482 mW cm−2 and high open circuit voltages (OCVs) of 1–1.06 V at 450–550 °C, while the ZnO-LCP cell delivers significantly enhanced performance with maximum power density of 864 mW cm−2 and OCV of 1.07 V at 550 °C. The conductive properties of the materials are investigated. As a consequence, the ZnO electrolyte and ZnO-LCP composite exhibit extraordinary ionic conductivities of 0.09 and 0.156 S cm−1 at 550 °C, respectively, and the proton conductive behavior of ZnO is verified. Furthermore, performance enhancement of the ZnO-LCP cell is studied by electrochemical impedance spectroscopy (EIS), which is found to be as a result of the significantly reduced grain boundary and electrode polarization resistances. These findings indicate that ZnO is a highly promising alternative semiconducting-ionic membrane to replace the electrolyte materials for advanced LT-SOFCs, which in turn provides a new strategic pathway for the future development of electrolytes.

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Industrial-grade rare-earth and perovskite oxide for high-performance electrolyte layer-free fuel cell

Cited by 95 publications

References 51 publications

Thin‐Film Fuel Cells using a Sodium Silicate Binder with La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) and LaCePr Oxides (LCP) Membranes

Thin‐Film Fuel Cells using a Sodium Silicate Binder with La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) and LaCePr Oxides (LCP) Membranes

Carbonate dual-phase improves the ionic conductivity and performance of mixed ionic and semiconductor single-layer fuel cell

Study on Zinc Oxide-Based Electrolytes in Low-Temperature Solid Oxide Fuel Cells

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Industrial-grade rare-earth and perovskite oxide for high-performance electrolyte layer-free fuel cell

Cited by 95 publications

References 51 publications

Thin‐Film Fuel Cells using a Sodium Silicate Binder with La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) and LaCePr Oxides (LCP) Membranes

Thin‐Film Fuel Cells using a Sodium Silicate Binder with La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) and LaCePr Oxides (LCP) Membranes

Carbonate dual-phase improves the ionic conductivity and performance of mixed ionic and semiconductor single-layer fuel cell

Study on Zinc Oxide-Based Electrolytes in Low-Temperature Solid Oxide Fuel Cells

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Product

Resources

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Thin‐Film Fuel Cells using a Sodium Silicate Binder with La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) and LaCePr Oxides (LCP) Membranes

Thin‐Film Fuel Cells using a Sodium Silicate Binder with La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) and LaCePr Oxides (LCP) Membranes