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@article{Madabattula:2020:10.1149/2.0272001JES,
author = {Madabattula, G and Wu, B and Marinescu, M and Offer, G},
doi = {10.1149/2.0272001JES},
journal = {Journal of The Electrochemical Society},
title = {How to design lithium ion capacitors: modelling, mass ratio ofelectrodes and pre-lithiation},
url = {http://dx.doi.org/10.1149/2.0272001JES},
volume = {167},
year = {2020}
}

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TY - JOUR
AB - Lithium ion capacitors (LICs) store energy using double layer capacitance at the positive electrode and intercalation at the negative electrode. LICs offer the optimum power and energy density with longer cycle life for applications requiring short pulses of high power. However, the effect of electrode balancing and pre-lithiation on usable energy is rarely studied. In this work, a set of guidelines for optimum design of LICs with activated carbon (AC) as positive electrode and lithium titanium oxide (LTO) as negative electrode was proposed. A physics-based model has been developed and used to study the relationship between usable energy at different effective C rates and the mass ratio of the electrodes. The model was validated against experimental data from literature. The model was then extended to analyze the need for pre-lithiation of LTO. The limits for pre-lithiation in LTO and use of negative polarization of the AC electrode to improve the cell capacity have been analyzed using the model. Furthermore, the model was used to relate the electrolyte depletion effects to poorer power performance in a cell with higher mass ratio. The open-source model can be re-parameterised for other LIC electrode combinations, and should be of interest to cell designers.
AU - Madabattula,G
AU - Wu,B
AU - Marinescu,M
AU - Offer,G
DO - 10.1149/2.0272001JES
PY - 2020///
SN - 0013-4651
TI - How to design lithium ion capacitors: modelling, mass ratio ofelectrodes and pre-lithiation
T2 - Journal of The Electrochemical Society
UR - http://dx.doi.org/10.1149/2.0272001JES
UR - http://hdl.handle.net/10044/1/75746
VL - 167
ER -

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