Peng Bai

 

Math, Science & History

My research interests focus on the rational engineering of energy storage materials and systems by exploiting theoretical understandings of the multi-scale and multi-physics mechanisms.

Theory and experiment of intercalation battery nanomaterials

Interfacial Charge Transfer Kinetics

We are developing new electroanalytical methods to extract local rates of charge transfer in porous electrodes, and adopted the microscopic Marcus theory to analyze the curved Tafel plots. Findings by our method would lead to better desige of particles surfaces in terms of efficiency and life time.

See the full story in our paper published in Nature Communications in 2014.


Porous Electrode Theory

In the voltage-step experiments, the non-monotonic transient currents of a porous electrode are commonly interpreted as the nucleation and growth mechanism by the Kolmogorov-Johnson-Mehl-Avrami (KJMA) theory. We developed a simple statistical model showing that this characteristic could be a result of the statistical effects caused by a simple Markov process among countless composing nanoparticles.

See the full story in our paper published in Electrochimica Acta in 2013.


Electrochemical Phase Transformation Dynamics

We developed an eletrochemical phase-field model for single LiFePO4 nanoparticle, which couples the Butler-Volmer equation with the Cahn-Hilliard equation in a thermodynamically consistent manner. It for the first time predicts that phase separation can be suppressed by the applied voltage or current. This work defined the framework for multi-physics modeling of electrochemical engineering systems.

See the full story in our paper published in Nano Letters in 2011.


Lithium bromine/seawater redox flow battery


Mechanisms and control of dendritic electrodeposition

Cu electrodeposition in porous media


Li electrodeposition in organic electrolytes


Nanomaterials for energy storage

LiFePO4 nanoparticles for lithium ion batteries


MnO2 nanoparticles for pseudocapacitors

coming soon

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Copyright © Peng Bai 2014