Results of a 20 000 h lifetime test of a 7 kW direct methanol fuel cell (DMFC) hybrid system – degradation of the DMFC stack and the energy storage

Abstract

First-ever lifetime test of a DMFC system lasting 25 600 h with a dynamic load profile of a material handling vehicle.

A review on durability issues and restoration techniques in long-term operations of direct methanol fuel cells

“…The degradation rate was only 5 mV h À1 at 120 mA cm À2 which accounted for a total power density loss of 14%. Recently, Kimiaie et al [35] reported ground breaking results where they demonstrated a successful lifetime operation of DMFC stack for 20,000 h integrated in a hybrid energy system for powering a forklift truck. The results of their study present a vital achievement regarding the durability of DMFC systems that has been a matter of serious concern.…”

Electrocatalytic and Electroanalytic Investigation of Carbohydrates Oxidation on Gold-Based Nanocatalysts in Alkaline and Neutral pHs

“…Carbon-based fuels can be used in fuel cells (FCs) [1][2][3][4][5][6] for the production of electricity -despite their relatively low gravimetric energy density compared to molecular hydrogen, 33 kWh kg −1 vs. 1-9 kWh kg −1 -or in electrolysis cells (ECs) [7][8][9][10][11] for the production of fuels and/or chemicals. For FCs, the main selection criterion for the design and fabrication of electrode materials is the electrooxidation with the lowest overpotential, i.e., at low electrode potentials (E), ideally E < 0.7 V vs. reversible hydrogen electrode (RHE).…”

Synergistic electrocatalytic activity of a spinel ZnCo2O4/reduced graphene oxide hybrid towards oxygen reduction reaction

“…Among all the available energy conversion options, fuel cells appear to be more promising because of their ability to convert chemical energy into electrical energy in an efficient and non-polluting way [6]. Due to their high energy and power density, both proton-exchange membrane fuel cells (PEMFC) and direct methanol fuel cells (DMFC) have shown promising results for their application as energy conversion sources for high-end electronic devices and electric vehicles [7,8]. Electrochemical oxygen reduction reaction (ORR) has already been realized as a key aspect in areas like energy storage and energy conversion, and therefore, oxygen reduction reaction surely plays a pivotal role in facilitating an energy conversion process inside a typical fuel cell [9].…”