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Accelerated Conditioning

The Experts below are selected from a list of 39 Experts worldwide ranked by ideXlab platform

Haijiang Wang – 1st expert on this subject based on the ideXlab platform

  • Accelerated Conditioning for a proton exchange membrane fuel cell
    Journal of Power Sources, 2012
    Co-Authors: Xiaozi Yuan, Haijiang Wang, Hui Li

    Abstract:

    Abstract A Conditioning process is usually needed for a newly fabricated proton exchange membrane (PEM) fuel cell to be activated. Depending on the membrane electrode assemblies, this process can take hours and even days to complete. To provide for Accelerated Conditioning techniques that can complete the process in a short time, this paper compares various reported methods to condition a PEM single cell. The major objectives are to identify Accelerated Conditioning approaches that can significantly reduce the Conditioning duration for the existing Conditioning regime in an operationally easy manner, and to understand the fundamental principles that govern Accelerated Conditioning. Various effects investigated include temperature, cycling steps, and cycling frequencies. Other techniques, such as short circuiting, hydrogen pumping, and hot water circulation, are also discussed. For each technique, measurements are taken using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV).

  • a review of Accelerated Conditioning for a polymer electrolyte membrane fuel cell
    Journal of Power Sources, 2011
    Co-Authors: Xiaozi Yuan, Shengsheng Zhang, Haijiang Wang

    Abstract:

    Abstract A newly fabricated polymer electrolyte membrane (PEM) fuel cell usually needs a so-called break-in/Conditioning/incubation period to activate it and reach its best performance. Typically, during this activation period the cell performance increases gradually, and then reaches a plateau without further increase. Depending on the membrane electrode assemblies, this process can take hours and even days to complete, which consumes a considerable amount of hydrogen fuel, leading to a higher operating cost. To provide for Accelerated Conditioning techniques that can complete the process in a short time period, this paper reviews established Conditioning protocols and reported methods to condition PEM single cells and stacks, in an attempt to summarize available information on PEM fuel cell Conditioning and the underlying mechanisms. Various techniques are arranged into two categories: on-line Conditioning and off-line Conditioning. For each technique, the experimental procedure and outcomes are outlined. Finally, weaknesses of the currently used Conditioning techniques are indicated and further research efforts are proposed.

Xiaozi Yuan – 2nd expert on this subject based on the ideXlab platform

  • Accelerated Conditioning for a proton exchange membrane fuel cell
    Journal of Power Sources, 2012
    Co-Authors: Xiaozi Yuan, Haijiang Wang, Hui Li

    Abstract:

    Abstract A Conditioning process is usually needed for a newly fabricated proton exchange membrane (PEM) fuel cell to be activated. Depending on the membrane electrode assemblies, this process can take hours and even days to complete. To provide for Accelerated Conditioning techniques that can complete the process in a short time, this paper compares various reported methods to condition a PEM single cell. The major objectives are to identify Accelerated Conditioning approaches that can significantly reduce the Conditioning duration for the existing Conditioning regime in an operationally easy manner, and to understand the fundamental principles that govern Accelerated Conditioning. Various effects investigated include temperature, cycling steps, and cycling frequencies. Other techniques, such as short circuiting, hydrogen pumping, and hot water circulation, are also discussed. For each technique, measurements are taken using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV).

  • a review of Accelerated Conditioning for a polymer electrolyte membrane fuel cell
    Journal of Power Sources, 2011
    Co-Authors: Xiaozi Yuan, Shengsheng Zhang, Haijiang Wang

    Abstract:

    Abstract A newly fabricated polymer electrolyte membrane (PEM) fuel cell usually needs a so-called break-in/Conditioning/incubation period to activate it and reach its best performance. Typically, during this activation period the cell performance increases gradually, and then reaches a plateau without further increase. Depending on the membrane electrode assemblies, this process can take hours and even days to complete, which consumes a considerable amount of hydrogen fuel, leading to a higher operating cost. To provide for Accelerated Conditioning techniques that can complete the process in a short time period, this paper reviews established Conditioning protocols and reported methods to condition PEM single cells and stacks, in an attempt to summarize available information on PEM fuel cell Conditioning and the underlying mechanisms. Various techniques are arranged into two categories: on-line Conditioning and off-line Conditioning. For each technique, the experimental procedure and outcomes are outlined. Finally, weaknesses of the currently used Conditioning techniques are indicated and further research efforts are proposed.

Hui Li – 3rd expert on this subject based on the ideXlab platform

  • Accelerated Conditioning for a proton exchange membrane fuel cell
    Journal of Power Sources, 2012
    Co-Authors: Xiaozi Yuan, Haijiang Wang, Hui Li

    Abstract:

    Abstract A Conditioning process is usually needed for a newly fabricated proton exchange membrane (PEM) fuel cell to be activated. Depending on the membrane electrode assemblies, this process can take hours and even days to complete. To provide for Accelerated Conditioning techniques that can complete the process in a short time, this paper compares various reported methods to condition a PEM single cell. The major objectives are to identify Accelerated Conditioning approaches that can significantly reduce the Conditioning duration for the existing Conditioning regime in an operationally easy manner, and to understand the fundamental principles that govern Accelerated Conditioning. Various effects investigated include temperature, cycling steps, and cycling frequencies. Other techniques, such as short circuiting, hydrogen pumping, and hot water circulation, are also discussed. For each technique, measurements are taken using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV).