Effect of fabrication and operating parameters on electrochemical property of anode and cathode for direct methanol fuel cells

Liu, Guicheng; Zhou, Hongwei; Ding, Xianan; Li, Xinping; Zou, Dechun; Li, Xinyang; Wang, Xindong; Lee, Joong Kee

doi:10.1016/j.enconman.2016.06.008

Cited by 29 publications

(3 citation statements)

References 24 publications

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“…Thus, the effect of different operating conditions on the DFAFC with respect to the performance of the Co-NCNT catalyst was investigated. 55,56 At the operating temperature of 60°C, optimum operating condition achieved by the DFAFC is at 7 M formic acid and an oxygen flow rate of 700 mL min −1 ; the highest obtained maximum power density is 160.7 mW cm −2 . Figures 6 and 7 show the polarization and power density curves of DFAFC with the Co-NCNT catalyst as the cathode at 30 and 60°C, respectively.…”

Section: Effect Of the Operating Condition On The Dfafc Performancementioning

confidence: 99%

“…Although high oxygen flow rate enables in the increase of the mass transportation of oxygen and enhance the ORR activity, the considerable amount of oxygen will dry up the Nafion membrane and decrease the proton transport ability. 55,56 At the operating temperature of 60°C, optimum operating condition achieved by the DFAFC is at 7 M formic acid and an oxygen flow rate of 700 mL min −1 ; the highest obtained maximum power density is 160.7 mW cm −2 . As the formic acid concentration increases to become greater than 10 M, the maximum power density decreases for all the oxygen flow rates.…”

Section: Effect Of the Operating Condition On The Dfafc Performancementioning

confidence: 99%

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Performance of direct formic acid fuel cell using transition metal‐nitrogen‐doped carbon nanotubes as cathode catalysts

et al. 2019

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Summary The application of nonprecious metal catalysts, such as iron (Fe) and cobalt (Co) catalyst, to direct liquid fuel cells (DLFCs), especially in direct methanol fuel cells, has been widely investigated. However, the application of such non‐Pt catalysts as cathode catalysts in direct formic acid fuel cell (DFAFC) operations has not yet been investigated. This study intends to evaluate the formic acid tolerance of such catalysts in case of oxygen reduction reaction. In addition, we investigate their performances in DFAFC using the Fe‐ and Co‐nitrogen‐doped carbon nanotubes (Fe‐NCNT and Co‐NCNT) as the cathode catalysts and compare these performances with the commercial Pt/C catalyst. Herein, Fe‐NCNT and Co‐NCNT were synthesized using the conventional method by the pyrolysis of the multiwalled carbon nanotubes, dicyandiamide, and metal salt under the flow of N2 at 800°C. Both the Fe‐NCNT and Co‐NCNT catalysts exhibit higher formic acid tolerance when compared with that exhibited by the Pt/C catalyst. Further, single‐cell tests with hydrogen‐fed polymer electrolyte fuel cell (PEFC) and DFAFC operations were conducted under various operating conditions to compare the performances of the cells while using the prepared catalysts and the conventional Pt/C catalyst. The PEFC performances in both the Fe‐NCNT and Co‐NCNT catalysts were significantly low (94.9mW cm−2 for Fe‐NCNT and 164.0 mW cm−2 for Co‐NCNT at 60°C). Regardless, the Co‐NCNT catalyst exhibited a maximum power density of 160.7 mW cm−2 in DFAFC operated at 60°C and7‐M formic acid. This value is comparable with that for DFAFC with a Pt/C catalyst (128.9mW cm−2) and is considerably higher than that obtained for other DLFCs while using a non‐Pt catalyst. Therefore, the usage of a non‐Pt metal catalyst as the cathode catalyst is preferable in case of DFAFC.

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Section: Effect Of the Operating Condition On The Dfafc Performancementioning

confidence: 99%

Section: Effect Of the Operating Condition On The Dfafc Performancementioning

confidence: 99%

Performance of direct formic acid fuel cell using transition metal‐nitrogen‐doped carbon nanotubes as cathode catalysts

et al. 2019

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“…Liu et al [4] investigated the effect of diffusion layer components on these parameters through the study of the cell performance under different diffusion layer components. From another point of view, Liu et al [5] attempted to optimize the assembly force of the DMFCs by investigate the internal resistance and performance of the fuel cell at different values of that force. Similarly, Mahmoudi et al [6] proved numerically that, the cell performance and limiting current density increased as the gas diffusion layer compression increased due to the enhancement of the under rib flow.…”

Section: Introductionmentioning

confidence: 99%

Efficient fuel utilization by enhancing the under-rib mass transport using new serpentine flow field designs of direct methanol fuel cells

El-Zoheiry

Ookawara

Ahmed

2017

Energy Conversion and Management

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Soft, Highly Elastic, and Discharge‐Current‐Controllable Eutectic Gallium–Indium Liquid Metal–Air Battery Operated at Room Temperature

Liu

Kim

Wang

et al. 2018

Advanced Energy Materials

103

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Based on a liquid metal (eutectic alloy with 90 wt% gallium and 10 wt% indium) anode, a soft, highly elastic, discharge‐current‐controllable, cable‐shaped liquid metal–air battery operated at 25 °C, with effective reactions of Ga − 3e− → Ga3+ and O2 + 2H2O + 4e− → 4OH− is presented. In the liquid metal electrode, indium is used not only to inhibit the corrosion of gallium in the alkaline electrolyte but also to maintain the liquid state of the anode at room temperature. Thus, the liquid anode can be easily injected into (or extracted from) the battery cavity, leading to an easily renewable anode. In addition, the cable‐shaped battery shows a pressure‐responsive discharge current, owing to the soft, deformable battery body. Due to the liquid anode and flexible carbon fiber‐based cathode, the battery is highly flexible (bending radius < 1 mm) and easily recovers from any degree of bending without electrochemical performance impairment. With its elastic polyacrylic acid‐based gel electrolyte, the battery shows high elasticity, stretching by up to 100% (from 12 to 24 cm), excellent shape recovery from stretched states, and a discharge performance retention of 98.87%. Moreover, this paper provides the possibility to develop a deformable battery based on the liquid metal material.

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Effect of fabrication and operating parameters on electrochemical property of anode and cathode for direct methanol fuel cells

Cited by 29 publications

References 24 publications

Performance of direct formic acid fuel cell using transition metal‐nitrogen‐doped carbon nanotubes as cathode catalysts

Performance of direct formic acid fuel cell using transition metal‐nitrogen‐doped carbon nanotubes as cathode catalysts

Efficient fuel utilization by enhancing the under-rib mass transport using new serpentine flow field designs of direct methanol fuel cells

Soft, Highly Elastic, and Discharge‐Current‐Controllable Eutectic Gallium–Indium Liquid Metal–Air Battery Operated at Room Temperature

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