リン酸形燃料電池の劣化モードの経時変化

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  • History of PAFC Fuel Cell Performance Degradation Mode
  • リンサンガタ ネンリョウ デンチ ノ レッカ モード ノ ケイジ ヘンカ

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It is desirable to establish the accelerate evaluation method for phosphoric acid fuel cell durability in order to promote the PAFC's utilization. It is necessary to clarify the mechanism of voltage loss and investigate the accelerate factors for the establishment of test method. The accelerate factors of voltage loss has been defined by the subscale cell tests and it was found that the temperature is the key factor which accelerate the cell voltage loss by fullscale and subscale test. This paper focused the voltage loss by the gas diffusion which appeared after long time run and investigated the voltage loss mode change and the relation between the loss mode and an accelerate factor by the result of fullscale cell test of 20, 000 hour run. It was obtained that the accelerate test by temperature as an accelerate factor could adapt to the prediction of voltage loss till 40, 000 hour run.

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