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Selection of cathode materials for forsterite supported solid oxide fuel cells – Part I: Materials interactions
Journal of Power Sources ( IF 9.2 ) Pub Date : 2020-01-10 , DOI: 10.1016/j.jpowsour.2019.227607
Fabian Grimm , Norbert H. Menzler , Olivier Guillon

An inert-supported cell (ISC) was developed by Bosch with the aim of lowering the manufacturing costs of SOFCs and thus increasing their marketability and prolonging their lifetime. This ISC concept uses forsterite, a manganese silicate doped with Zn and Ca, as support material. The cell can be described as air side inert-supported cell, since forsterite faces the air compartment.

Forsterite was chosen as a support material, as it is abundant and therefore relatively inexpensive. All functional layers are subsequently applied and co-sintered at T < 1300 °C to further reduce cell manufacturing costs.

At present, LSM is used as a cathode. However, the performance of the cell is drastically reduced due to the formation of a Zn–Mn spinel at the triple-phase boundaries during co-firing.

Based on these findings, seven different cathodes were synthesized to identify a cathode that is less reactive with forsterite. In order to investigate their reactivity, different types of samples were prepared: mixed pellets, double-layered pellets and screen-printed cathode inks on forsterite green substrates. These samples and their cross sections were then investigated by using XRD, SEM, EDX, and WDX. Their reactivity was as follows (ascending order): LSFM > LSF > LSC > PSCF > LSCF > LCCF.



中文翻译:

镁橄榄石型固体氧化物燃料电池阴极材料的选择第I部分:材料相互作用

博世开发了一种惰性支撑电池(ISC),其目的是降低SOFC的制造成本,从而提高其可销售性并延长其使用寿命。此ISC概念使用镁橄榄石(一种掺杂有Zn和Ca的硅酸锰)作为载体材料。由于镁橄榄石面向空气室,因此该电池可谓是空气侧惰性支撑电池。

选择镁橄榄石作为载体材料,因为其含量丰富,因此相对便宜。随后在T <1300°C下施加并共烧结所有功能层,以进一步降低电池的制造成本。

目前,LSM被用作阴极。然而,由于在共烧过程中在三相边界处形成了Zn-Mn尖晶石,电池的性能急剧下降。

基于这些发现,合成了七个不同的阴极,以确定与镁橄榄石反应性较小的阴极。为了研究它们的反应性,制备了不同类型的样品:在镁橄榄石绿色基材上的混合颗粒,双层颗粒和丝网印刷阴极油墨。然后使用XRD,SEM,EDX和WDX研究这些样品及其横截面。它们的反应性如下(升序):LSFM> LSF> LSC> PSCF> LSCF> LCCF。

更新日期:2020-01-10
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