Nanotechnologies in ceramic electrochemical cells

Cao, Jiafeng; Ji, Yuexia; Shao, Zongping

doi:10.1039/d3cs00303e

Cited by 12 publications

(5 citation statements)

References 367 publications

(376 reference statements)

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“…Solid oxide fuel cells (SOFCs) offer a promising technology for generating clean electricity, which is of paramount importance in the pursuit of carbon neutrality. − In contrast to conventional oxygen ion-conducting SOFCs, protonic ceramic fuel cells (PCFCs) show great potential due to their ability to operate within intermediate temperature ranges (500–700 °C), facilitated by lower activation energy for proton transport. − Steam is generated on the cathode side, preventing fuel dilution on the anode and ensuring resilience against oxidation in the commonly used Ni-based cermet anode . However, the sluggish reaction kinetics of cathode materials at these intermediate temperatures significantly limit PCFC performance. , Therefore, an urgent need arises for the development of cathode materials with high activity and stability to drive the commercialization of PCFCs.…”

Section: Introductionmentioning

confidence: 99%

Dual Self-Assembled Nanocomposite Cathode for Protonic Ceramic Fuel Cells

Yuan,

Tong,

et al. 2024

Energy Fuels

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Protonic ceramic fuel cells (PCFCs) show great promise as a technology for clean power generation. However, the sluggish reaction kinetics and instability of the cathodes continue to impede their commercialization. Here, we report a multiphase nanocomposite produced through dual self-assembly, which serves as a highly active and durable cathode for PCFCs. During cathode sintering, self-assembly takes place to create a composite consisting of PrNi0.5Co0.5O3‑δ (PNC), BaCe0.7Zr0.1Y0.2O3‑δ (BCZY), and PrO x nanoparticles. Compared to the single-phase PNC cathode, this cathode demonstrates enhanced performance with a reduction of 49.1% in ohmic resistance and 48.5% in polarization resistance at 700 °C. This outcome is attributed to improved oxygen surface exchange kinetics and electrolyte–cathode interface strength. Furthermore, the self-assembled cathode in the single cell exhibits a 33.3% increase in power output relative to that of the PNC cathode cell. More interestingly, the cell displays performance activation during 400 h of operation, resulting in a power output increase of 27.5%. The cathode is revealed to be further self-assembled during operation in the post-mortem analysis, featuring an in situ-formed needle-like nanocomposite composed of BaPrO3 and BCZY. This work presents an innovative approach to nanocomposite self-assembly for potential use in PCFC cathode applications.

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Section: Introductionmentioning

confidence: 99%

Dual Self-Assembled Nanocomposite Cathode for Protonic Ceramic Fuel Cells

Yuan,

Tong,

et al. 2024

Energy Fuels

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“…However, in previous works, in situ formation of NPs requires a reductive atmosphere 12 or the introduction of vapor for a long time, 15 which is not convenient enough for practical operation. Hence, there is an imminent need to advance a more facile in situ exsolution approach, for example, thermal-induced exsolution, 16 which has attracted increasing attention recently, and the few works focused on it proved its wide potential in the PCC field. 17,18 Here, with the ex/in situ experiments and corresponding first-principles calculations, we proposed a simple and expedient temperature-induced exsolution method to in situ form SrCo 0.5 Nb 0.5 O 3−δ (SCN) NPs on the surface of PrSrCo 1.8 Nb 0.2 O 3−δ (PSCN).…”

Section: Introductionmentioning

confidence: 99%

“…However, in previous works, in situ formation of NPs requires a reductive atmosphere or the introduction of vapor for a long time, which is not convenient enough for practical operation. Hence, there is an imminent need to advance a more facile in situ exsolution approach, for example, thermal-induced exsolution, which has attracted increasing attention recently, and the few works focused on it proved its wide potential in the PCC field. , …”

Section: Introductionmentioning

confidence: 99%

A Superior Catalytic Air Electrode with Temperature-Induced Exsolution toward Protonic Ceramic Cells

Zhu,

Zhang,

Shi

et al. 2024

ACS Nano

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Protonic ceramic cells merit extensive exploration, attributed to their innate capabilities for potent and environmentally benign energy conversion. In this work, a temperatureinduced exsolution methodology to synthesize SrCo 0.5 Nb 0.5 O 3−δ (SCN) nanoparticles (NPs) with notably elevated activity on the surface of PrSrCo 1.8 Nb 0.2 O 6−δ (PSCN) is proposed, directly addressing the extant challenge of restrained catalytic activity prevalent in air electrode materials. In situ assessments reveal that SCN NPs commence exsolution from the matrix at temperatures surpassing 900 °C during straightforward calcination processes and maintain stability throughout annealing. Notably, the resultant SCN−PSCN interface facilitates vapor adsorption and protonation processes, which are poised to enhance surface reaction kinetics pertaining to the proton-involved oxygen reduction and evolution reaction (P-ORR and P-OER). A fuel-electrode-supported protonic ceramic cell leveraging SCN−PSCN as the air electrode manifests compelling performance, attaining a peak power density of 1.30 W•cm −2 in the fuel cell modality and a current density of 1.91 A•cm −2 at 1.3 V in the electrolysis mode, recorded at 650 °C. Furthermore, density functional theory calculations validate that the introduction of SCN NPs onto the PSCN surface conspicuously accelerates electrode reaction rates correlated with P-ORR and P-OER, by significantly mitigating energy barriers associated with surface oxygen and vapor dissociation.

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“…The development of nanostructured electrodes is also very effective for increasing the electrode activity at intermittent temperatures such as the well-known infiltration and exsolution methods. , In the exsolution method, transition or noble metal oxides are doped at the B -site of a parent perovskite lattice in an oxidizing atmosphere and then exsoluted under a reducing environment or under cathodic polarization, forming nanosized metallic particles on the surface of host electrodes. ,, Such exsoluted nanoparticles (NPs) not only improve the electrode performance but also show high structural stability against agglomeration. However, this method suffers from several limitations.…”

Section: Introductionmentioning

confidence: 99%

Development of Nanostructured Lanthanum Strontium Cobalt Ferrite/Gadolinian-Doped Ceria Composite Electrodes of Solid Oxide Cells Formed by In Situ Polarization

Sun,

He,

et al. 2024

ACS Appl. Mater. Interfaces

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In the development of nanoscale oxygen electrodes of high-temperature solid oxide cells (SOCs), the interface formed between the nanoelectrode particles and the electrolyte or electrolyte scaffolds is the most critical. In this work, a new synthesis technique for the fabrication of nanostructured electrodes via in situ electrochemical polarization treatment is reported. The lanthanum strontium cobalt ferrite (LSCF) precursor solution is infiltrated into a gadolinia-doped ceria (GDC) scaffold presintered on a yttria-stabilized zirconia (YSZ) electrolyte, followed by in situ polarization current treatment at SOC operation temperatures. Electrode ohmic and polarization resistances decrease with an increase in the polarization current treatment. Detailed microstructure analysis indicates the formation of a convex-shaped interface between the LSCF nanoparticles (NPs) and the GDC scaffold, very different from the flat contact between LSCF and GDC observed after heating at 800 °C with no polarization current treatment. The embedded LSCF NPs on the GDC scaffold contribute to the superior stability under both fuel cell and electrolysis operation conditions at 750 °C and a high peak power density of 1.58 W cm −2 at 750 °C. This work highlights a novel and facile route to in situ construct a stable and high-performing nanostructured electrode for SOCs.

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Nanotechnologies in ceramic electrochemical cells

Abstract: A ceramic electrochemical cell is able to work in electrically activated SOEC mode and can also generate electric energy in SOFC mode, while nanotechnologies will greatly facilitate the mass transport and energy conversion processes in the cell.

Cited by 12 publications

References 367 publications

Dual Self-Assembled Nanocomposite Cathode for Protonic Ceramic Fuel Cells

Dual Self-Assembled Nanocomposite Cathode for Protonic Ceramic Fuel Cells

A Superior Catalytic Air Electrode with Temperature-Induced Exsolution toward Protonic Ceramic Cells

Development of Nanostructured Lanthanum Strontium Cobalt Ferrite/Gadolinian-Doped Ceria Composite Electrodes of Solid Oxide Cells Formed by In Situ Polarization

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