Novel Organic Electrode Materialsfor Innovative Thick Electrode Based Aqueous Batteries

Abstract

Thanks to the use of abundant chemical elements, organic chemistry provides great opportunities for discovering innovative electrode materials, which could be prepared (i) from renewable resources (biomass) and (ii) via eco-efficient processes, making the concept of greener and sustainable batteries possible [1]. Two types of reaction mechanisms can be used: n-type involving charge transfer with cation release/uptake and p-type involving anion uptake/release [2-5]. We are putting a lot of efforts on greener and sustainable organic batteries. In this communication, we report on novel materials, their uncommon reaction mechanism, and the performance of full aqueous cells. We focus on aqueous organic batteries as a new promising green technology, barely studied yet, for which negative electrodes are missing. We have designed and synthesized novel mixed p- and n-type “bi-block” oligomer negative electrodes with repeating units made of naphthalene diimide and bipyridinium units [6]. They demonstrate optimal potential, extremely fast kinetics and highly competitive capacity and cyclability in both neutral aqueous Na and Mg electrolytes, including ocean water. Based on these findings, full organic cells bearing millimeter thick electrodes were assembled and tested [7]. These findings make a big step forward the design of low-cost rocking-chair dual-ion aqueous batteries. References 1) P. Poizot, F. Dolhem, Energy Environ. Sci. 4, 2003 (2011). 2) Z. Song and H. Zhou, Energy Environ. Sci. 6, 2280 (2013). 3) S. Gottis, A.-L. Barrès, F. Dolhem, P. Poizot, ACS Appl Mater Interfaces 6, 10870 (2014). 4) E. Deunf, P. Moreau, E. Quarez, D. Guyomard, F. Dolhem, P. Poizot, J. Mater. Chem. A, 4, 6131 (2016). 5) E. Deunf, P. Jimenez, D. Guyomard, F. Dolhem, P. Poizot, Electrochem. Comm., 72, 64 (2016). 6) S. Perticarari, Y. Sayed-Ahmad-Baraza, C. Ewels, P. Moreau, D. Guyomard, P. Poizot, F. Odobel, J. Gaubicher, Adv. Energy Mater., 8, 1701988 (2018). 7) S. Perticarari, E. Grange, T. Doizy, Y. Pellegrin, E. Quarez, K. Oyaizu, A. J. Fernandez, D. Guyomard, P. Poizot, F. Odobel and J. Gaubicher, Chem. Mat., in revision