A novel in situ diffusion strategy to fabricate high performance cathodes for low temperature proton-conducting solid oxide fuel cells†,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A novel in situ diffusion strategy to fabricate high performance cathodes for low temperature proton-conducting solid oxide fuel cells†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-04-24 00:00:00 , DOI: 10.1039/c8ta00859k
Jie Hou _{1,

2,

3,

4,

5} , Lina Miao _{1,

2,

3,

4,

5} , Jianing Hui _{6,

7,

8} , Lei Bi _{5,

9,

10,

11,

12} , Wei Liu _{1,

2,

3,

4,

5} , John T. S. Irvine _{6,

7,

8}

Affiliation

Developing new low-cost high-performance cobalt-free cathode materials for low temperature proton-conducting solid oxide fuel cells (H-SOFCs) has been an imperative topic. In response to this challenge, we herein develop a novel in situ Pr diffusion strategy based on a Sm_0.2Ce_0.8O_2−δ–Pr(Pr_0.5Ba_1.5)Cu₃O_7−δ (SDC–PBCu, 3 : 7 wt%) compound, to achieve a perovskite-related proton-blocking composite cathode (PBCC) Ce_1−xPr_xO_2−δ–Ba₂CeCu₃O_7.4–Sm₂Ba_1.33Ce_0.67Cu₃O₉–CuO (PDC–BCC–SBCC–CuO) for BaZr_0.1Ce_0.7Y_0.2O_3−δ-based H-SOFCs. The single cell achieves a remarkable performance with a maximum power density (MPD) of 1000 and 566 mW cm⁻², corresponding to the interfacial polarization resistance (R_P) of 0.037 and 0.188 Ω cm² at 700 and 600 °C, respectively. The XRD results demonstrate that the PBCu phase disappears after the calcination of the mixed SDC–PBCu composite powder at 900 °C, with the formation of four new phases including fluorite structured PDC, orthorhombic layered material BCC, tetragonal perovskite-related SBCC and a small quantity of metallic oxide CuO, being favorable for a superior cathode performance. The ascendant electrochemical performance including the very high MPD and the lower R_P obtained here indicate that the quaternary cobalt-free PBCC PDC–BCC–SBCC–CuO is a preferable alternative for high-performance low-temperature H-SOFCs.

中文翻译：

一种新颖的原位扩散策略，可制造用于低温质子传导固体氧化物燃料电池的高性能阴极†

开发用于低温质子传导固体氧化物燃料电池（H-SOFC）的新型低成本高性能无钴阴极材料已经成为当务之急。在响应于这一挑战，我们这里所开发一种新型的原位基于一个钐镨扩散战略_0.2铈_0.8 ø _{2- δ} -Pr（镨_0.5巴_1.5）的Cu ₃ Ô _{7- δ}（SDC-PBCu，3：7重量％）的化合物，实现了钙钛矿有关的质子阻挡复合阴极（PBCC）的Ce _{1- X}镨_X ö _{2- δ} -Ba ₂ CECU ₃ ö _7.4-Sm ₂的Ba _1.33 Ce的_0.67的Cu ₃ ö ₉ -CuO（PDC-BCC-SBCC-CuO的）为BaZr _0.1 Ce的_0.7 ý _0.2 ø _{3- δ}系H-SOFC中。单电池以1000和566 mW cm ^-2的最大功率密度（MPD）实现了卓越的性能，对应于0.037和0.188Ωcm ²的界面极化电阻（R _P）分别在700和600°C下。XRD结果表明，在900°C下煅烧SDC-PBCu复合粉末后，PBCu相消失，形成了四个新相，包括萤石结构的PDC，正交晶层状材料BCC，四方钙钛矿相关的SBCC和少量的钙钛矿。量的金属氧化物CuO，有利于优异的阴极性能。此处具有很高的电化学性能，包括非常高的MPD和较低的R _P，这表明，季铵盐无铅PBCC PDC–BCC–SBCC–CuO是高性能低温H-SOFC的理想替代品。

更新日期：2018-04-24

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11