Hainan Wang

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Keywords: Electrochemical impedance spectroscopy Electric double layer Electrochemical capacitor Electric double layer capacitor RC circuit a b s t r a c t This paper aims to clarify the intrinsic limitations of electrochemical impedance spectroscopy (EIS) in measuring electric double layer (EDL) capacitance. For more than two decades, capacitances measured(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: Electric double layer capacitors Mesoporous electrode morphology Specific(More)
h i g h l i g h t s g r a p h i c a l a b s t r a c t < New boundary conditions were derived to account for the Stern layer without simulating formally it. < Both the Stern and diffuse layers were rigorously accounted for. < The new boundary conditions were valid for planar, cylindrical, and spherical electrodes or pores. < They made possible the(More)
1. INTRODUCTION Microelectrodes and ultramicroelectrodes (UMEs) have been the subjects of intense studies in electrochemical sensing 1À9 and in electrical energy storage and conversion. 10À21 Microelectrodes and ultramicroelectrodes refer to electrodes with characteristic sizes less than 25 μm. 3À6 These electrodes have been used extensively in different(More)
This paper presents a generalized modified Poisson−Nernst−Planck (MPNP) model derived from first principles based on excess chemical potential and Langmuir activity coefficient to simulate electric double-layer dynamics in asymmetric electrolytes. The model accounts simultaneously for (1) asymmetric electrolytes with (2) multiple ion species, (3) finite ion(More)
Keywords: Cyclic voltammetry Electric double layer Electrochemical capacitor Electric double layer capacitor Modified Poisson–Nernst–Planck model Dimensional analysis a b s t r a c t This paper aims to develop a model for simulating the electric double layer dynamics in CV measurements while simultaneously accounting for transport phenomena in both the(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t This paper presents scaling laws for the integral capacitance of(More)
This paper aims to numerically assess the effects of electrolyte properties and electrode morphology on the capacitance of electric double layer capacitors (EDLCs) made of mesoporous electrodes consisting of ordered cylindrical pores in non-aqueous electro-lytes. Simulations solved a three-dimensional modified Poisson-Boltzmann model. They accounted for the(More)
This study aims to provide insights into the electrochemical transport and interfacial phenomena in hybrid pseudocapacitors under galvanostatic cycling. Pseudocapacitors are promising electrical energy storage devices for applications requiring large power density. They also involve complex, coupled, and multiscale physical phenomena that are difficult to(More)
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