High-performance direct hydrogen peroxide fuel cells (DHPFCs) with silver nanowire-graphene hybrid aerogel as highly-conductive mesoporous electrodes

•A monolithic silver nanowire hybrid aerogel with reduced graphene oxide for DHPFC is proposed.•The new cathode material exhibits a favorable catalytic efficiency towards H2O2 reduction reaction process.•The direct hydrogen peroxide fuel cell delivers a substantially high power density. Direct hydro...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2020-02, Vol.381, p.122749, Article 122749
Main Authors: Yang, Yang, Dong, Ruizhe, Zhu, Yunlong, Li, Haosheng, Zhang, Heng, Fan, Xiaomeng, Chang, Honglong
Format: Article
Language:English
Subjects:
DHPFC
Graphene aerogel
Hydrogen peroxide
Silver nanowire
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Summary:•A monolithic silver nanowire hybrid aerogel with reduced graphene oxide for DHPFC is proposed.•The new cathode material exhibits a favorable catalytic efficiency towards H2O2 reduction reaction process.•The direct hydrogen peroxide fuel cell delivers a substantially high power density. Direct hydrogen peroxide fuel cells have inspired the benign interests for air-independent submarine and underwater unmanned electronic applications. Yet, the process of H2O2 reduction reaction is significantly hindered by the sluggish electron transfer kinetics and poor mass transport efficiency. Herein, a three-dimensional monolithic silver nanowire aerogel assisted by the graphene monolayers is prepared, and validated as a promising H2O2 reduction catalyst. The interconnected, continuous aerogels and the substrate-free features allow the electron rapid flow and mass transport. Attributed to above advantages, the composites exhibit a high effectiveness and a low impedance during the catalysis. The direct hydrogen peroxide fuel cell equipped with these hybrid aerogels delivers a maximum power density of 1.4 W g−1 and 11.25 W g−1 $−1 based on the electrode weight and capital cost, which are substantially higher than previous values. The concept of building three-dimensional aerogels as self-standing electrodes provides a method for designing and manufacturing next-generation direct hydrogen peroxide fuel cells to bring the technology much closer to commercialization.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2019.122749