Methodological Studies of the Mechanism of Anion Insertion in Nanometer‐Sized Carbon Micropores
Taylor, Erin E.
Kravchyk, Kostiantyn V.
Kovalenko, Maksym V.
Stadie, Nicholas P.
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Dual-ion hybrid capacitors (DIHCs) are a promising class of electrochemical energy storage devices intermediate between batteries and supercapacitors, exhibiting both high energy and power density, and generalizable across wide chemistries beyond lithium. In this study, a model carbon framework material with a periodic structure containing exclusively 1.2 nm width pores, zeolite-templated carbon (ZTC), was investigated as the positive electrode for the storage of a range of anions relevant to DIHC chemistries. Screening experiments were carried out across 21 electrolyte compositions within a common stable potential window of 3.0–4.0 V vs. Li/Li+ to determine trends in capacity as a function of anion and solvent properties. To achieve fast rate capability, a binary solvent balancing a high dielectric constant with a low viscosity and small molecular size was used; optimized full-cells based on LiPF6 in binary electrolyte exhibited 146 Wh kg−1 and >4000 W kg−1 energy and power densities, respectively.
This is the peer reviewed version of the following article: [Methodological Studies of the Mechanism of Anion Insertion in Nanometer‐Sized Carbon Micropores. ChemSusChem (2022)], which has been published in final form at https://doi.org/10.1002/cssc.202201847. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions: https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html#3.
Welty, C., Taylor, E. E., Posey, S., Vailati, P., Kravchyk, K. V., Kovalenko, M. V., & Stadie, N. P. (2022). Methodological Studies of the Mechanism of Anion Insertion in Nanometer‐Sized Carbon Micropores. ChemSusChem, e202201847.