A compact and seal-less direct carbon solid oxide fuel cell stack stepping into practical application

Qianyang Chen, Qianyuan Qiu, Xiaomin Yan, Mingyang Zhou, Yapeng Zhang, Zhijun Liu, Weizi Cai, Wei Wang, Jiang Liu*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

The direct carbon solid oxide fuel cell is a potential technology that efficiently and cleanly converts the chemical energy of solid carbon into electricity. Its superiority of all-solid-state configuration and unique operating mechanism indicate that it has a good application prospect in high energy density portable or backup power supplys. It can also be used to convert coal into electrical power. Here, for the first time, we report a compact direct carbon solid oxide fuel cell stack with 12 cells fabricated on a single 10 × 10 cm electrolyte plate. The plate covers a container filled with solid carbon-rich fuel to form a stack. No sealant and pipelines are needed and the carbon-rich fuel can be reloaded. Both activated carbon and sawdust of bauhinia tree branch are used as the fuel. The output power of such a stack approaches more than 10 W at 800 °C. Using 15 g of 5 wt% Fe-loaded activated carbon as the fuel, a stack discharging at a constant current of 1.5 A outputs an energy of 29 Wh, correspongding to an energy desnity of carbon of ∼2000 Wh kg−1. This work shows the feasibility of developing direct carbon solid oxide fuel cell into a compact electricity generator using readily available carbon-rich fuels. It also shows promise of using this technology in clean and efficient conversion of coal to electricity.

Original languageEnglish
Article number115657
Number of pages10
JournalApplied Energy
Volume278
DOIs
Publication statusPublished - 15 Nov 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Biomass
  • Carbon fuel
  • Cell stack
  • Coal
  • Electrolyte plate
  • Solid oxide fuel cell

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