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Citation: XU Ming-Yuan, DING Han-Ming, YUAN Ting, CAO Jian-Yu, ZOU Zhi-Qing, XIA Bao-Jia, YANG Hui. Optimization of Cathode Microporous Diffusive Layer of Air-Breathing Direct Methanol Fuel Cell[J]. Chinese Journal of Applied Chemistry, ;2009, 26(2): 135-139. shu

Optimization of Cathode Microporous Diffusive Layer of Air-Breathing Direct Methanol Fuel Cell

1.
a Department of Chemistry, East China Normal University, Shanghai 200062;
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b Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050

Corresponding author: YANG Hui,
Received Date: 7 January 2008
Available Online: 23 April 2008
Fund Project: 国家科技部“八六三”计划(2006AA05Z136,2006AA04Z342,2007AA05Z141) (2006AA05Z136,2006AA04Z342,2007AA05Z141)国家自然科学基金(20673136,20706056) (20673136,20706056)上海浦江计划(06PJ14110) (06PJ14110)

By adjusting the proportion of Ketjen black EC-600JD(KB) and Black pearls 2000(BP),the optimal pore structure of the cathode microporous diffusive layer of an air-breathing direct methanol fuel cell(DMFC) can be obtained,which improves the mass transfer of oxygen and avoids the water flooding within the cathode.The experimental results show that the addition of BP in the cathode diffusive layer has a significant influence on DMFC's performance.When the mass ratio of KB and BP is ca.9:1,an air-breathing DMFC at a temperature of 25 ℃ exhibits the highest power density of 20.8×10^-3 W/cm² with the best stability.It is believed that the enhanced power density and improved stability of the DMFC could be ascribed to an improvement in cathode porous structure due to the addition of small amounts of BP.
- direct methanol fuel cell,
- air-breathing,
- cathode microporous layer,
- cathode water management,
- membrane electrode assembly
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