An All-Solid-State Carbon-Air Battery Reaching an Output Power over 10 W and a Specific Energy of 3600 Wh kg-1

Xiaomin Yan, Mingyang Zhou, Yapeng Zhang, Qianyuan Qiu, Qianyang Chen, Weizi Cai, Yubao Tang, Jiang Liu*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)
3 Downloads (Pure)


Carbon-air batteries have a very high theoretical specific energy. However, they have not been given sufficient attention because of the challenges associated with optimizing the battery design and making it rechargeable. Here we report a novel carbon-air battery stack based on solid oxide electrolyte which enables high operating temperature. The battery is composed of a tubular membrane electrode assembly (MEA), with a solid oxide electrolyte layer sandwiched between two porous electrodes, and carbon powder filled inside the MEA tube. By introducing a row of holes along the length direction of the MEA tube for current collection, the performance of the battery can be significantly enhanced because of shortened current paths. By using a removable quartz plug to stuff the open end of the MEA tube, the battery becomes mechanically rechargeable. Several batteries can be assembled into a stack by connecting the batteries in electrical series through the holes for current collection. A 3-battery-stack operating at 800 °C displays an output power of 11.0 W, corresponding to ∼160 mW cm-2. With an overall carbon powder of ∼10 g, the stack discharges at 0.5 A and ∼2.75 V for 26 h, revealing a specific energy of ∼3600 Wh kg-1, which is significantly higher than those of the state-of-the-art metal-air batteries.
Original languageEnglish
Article number127057
Number of pages8
JournalChemical Engineering Journal
Early online date19 Sep 2020
Publication statusPublished - 15 Jan 2021
MoE publication typeA1 Journal article-refereed


  • carbon-air battery
  • all-solid-state
  • tubular 3-battery-stack
  • improved current collection
  • mechanically rechargeable


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