Design of perforated structures of cathode current collectors in micro-direct methanol fuel cells

ZHANG Peng; ZHANG Yu-feng; ZHANG Bo; LIU Xiao-wei

doi:10.3788/OPE.20111904.0820

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Design of perforated structures of cathode current collectors in micro-direct methanol fuel cells

Article | 更新时间：2020-08-12

- Design of perforated structures of cathode current collectors in micro-direct methanol fuel cells
- Optics and Precision Engineering Vol. 19, Issue 4, Pages: 820-827(2011)
- 作者机构：
  
  1. 哈尔滨工业大学 MEMS中心,黑龙江哈尔滨,150001
  2. 哈尔滨工业大学微系统与微结构制造教育部重点实验室,黑龙江哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111904.0820
  CLC： TM911.4
- Received：08 August 2010，
  
  Revised：26 August 2010，
  
  Published Online：26 April 2011，
  
  Published：26 April 2011
- 稿件说明：
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张鹏, 张宇峰, 张博, 刘晓为. 微型直接甲醇燃料电池阴极集流板多孔结构设计[J]. 光学精密工程, 2011,19(4): 820-827

ZHANG Peng, ZHANG Yu-feng, ZHANG Bo, LIU Xiao-wei. Design of perforated structures of cathode current collectors in micro-direct methanol fuel cells[J]. Editorial Office of Optics and Precision Engineering, 2011,19(4): 820-827
张鹏, 张宇峰, 张博, 刘晓为. 微型直接甲醇燃料电池阴极集流板多孔结构设计[J]. 光学精密工程, 2011,19(4): 820-827 DOI： 10.3788/OPE.20111904.0820.

ZHANG Peng, ZHANG Yu-feng, ZHANG Bo, LIU Xiao-wei. Design of perforated structures of cathode current collectors in micro-direct methanol fuel cells[J]. Editorial Office of Optics and Precision Engineering, 2011,19(4): 820-827 DOI： 10.3788/OPE.20111904.0820.

摘要

针对自呼吸微型直接甲醇燃料电池阴极氧气传质效率低和性能差等问题

对微型直接甲醇燃料电池阴极集流板多孔结构进行了设计和实验研究。通过建立甲醇燃料电池阴极模型

分析了集流板开孔形状和开孔率的变化对电池性能的影响

指出开孔形状对阴极电流几乎没有影响

开孔率在一定范围内变化时阴极电流变化较小。然后对得出的结果进行了实验验证。提出了一种具有平行沟道的阴极集流板多孔结构

通过对阴极氧气浓度、速度和电流密度的模拟仿真

说明了提出的结构可以有效改善氧气传质和提高电池性能。利用微精密加工技术实现了有效面积为8 mm8 mm的自呼吸微型直接甲醇燃料电池

室温下测试显示

当甲醇溶液浓度为1 mol/L

流速为1 ml/min时

最大输出功率达到11 mW/cm

为便携式微能源系统的应用开发奠定了基础。

Abstract

To solve the low efficiency of oxygen mass transport and weak performance of self-breathing micro-direct methanol fuel cells (DMFCs)

the different cathode current collectors with a perforated structure were designed. Firstly

the effects of opening shapes and opening ratios on the cell performance were studied by establishing the cathode model of DMFC

which indicates that the opening shapes have little effect on the cathode current density

and the variations of cathode current are rather small in the range of opening ratios. Then

experiments were performed to verify the simulations. Based on the above analysis

a cathode perforated structure with parallel channels was presented. Compared with conventional structures

the simulation results illustrate that the improved structure can effectively improve the oxygen mass transport to increase the cell performance. A self-breathing DMFC with the active area of 8 mm8 mm was fabricated on the stainless steel plates by utilizing micromachining technology. Test results show that the peak power density of the DMFC is 11 mW/cm

with methanol solution of 1 mol/L and speed of 1 ml/min at room temperature. In conclusion

the improved self-breathing cathode structure can be contribute to further development of portable micro power source systems.

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references

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