Boosting the power density of direct borohydride fuel cells to >600 mW cm−2 by cathode water management

Wenxing Jiang, Fangfang Wan, Qiqi Wan, Endao Zhang, Zhenying Chen, Yang Zhang, Jianbin Luo, Yingying Liu, Xiaodong Zhuang, Junliang Zhang and Changchun Ke

Applied Energy, 2025, vol. 378, issue PB, No S0306261924023225

Abstract: Direct borohydride fuel cell (DBFC) has garnered significant interest due to its high energy density. However, the power density remains insufficient for commercial applications. Lots of works have been conducted on the kinetics of the anode reaction, while little attention has been devoted to cathode water management which is important issue for direct liquid fuel cell. Herein, a new structure gas diffusion layer (GDL) with hetero-junction double microporous layer (HJD-MPL) is developed. Utilizing the HJD-MPL structure, achieving a peak power density of 688 mW cm−2 at 80 °C, which exceeds the literature reports (453 mW cm−2). With higher porosity, permeability and stronger gradient capillary force, the oxygen transfer resistance is reduced from 75.5 s cm−1 of commercial GDL to 24.4 s cm−1. This study offers new insight into DBFCs, emphasizing cathode engineering to advance more effective and reliable direct liquid fuel cell technologies.

Keywords: Direct borohydride fuel cell; Hetero-junction double microporous layer; Oxygen transport resistance; Cathode (search for similar items in EconPapers)
Date: 2025
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261924023225
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:378:y:2025:i:pb:s0306261924023225

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2024.124939

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().