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Citation: HU Dao-Zhong, CHEN Shi, WANG Zi-Dong, ZHAO Shu-Hong. The Measurement and Application of Hydrogen Diffusion Coefficient in MH Electrode[J]. Acta Physico-Chimica Sinica, ;2006, 22(09): 1151-1154. doi: 10.3866/PKU.WHXB20060923 shu

The Measurement and Application of Hydrogen Diffusion Coefficient in MH Electrode

1.
School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P. R. China; China North Vehicle Research Institute, Battery Test Base of 863 Special Project for Electric Vehicle, Beijing 100072, P. R. China

Received Date: 10 March 2006
Available Online: 4 September 2006

The average value of hydrogen diffusion coefficient in metal hydride (MH) electrode was measured by constant current discharge method. The relationship between hydrogen diffusion coefficient and state of charge (SOC) was determined by potentiostatic method. According to the MH electrode model, the fast charging performance of MH electrode can be improved by increasing hydrogen diffusion coefficient or decreasing the particle size of hydrogen storage alloy. The time when the surface hydrogen atom concentration on the MH electrode reaches maximum value under different initial states of charge and charge rates also can be calculated.
- Model of MH electrode;Hydrogen diffusion coefficient;Fast charging;Inner pressure
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