Development and characterization of new families of organic alkaline salts for Charge Transfer Complexes in battery applications - CEA - Commissariat à l’énergie atomique et aux énergies alternatives
Communication Dans Un Congrès Année : 2024

Development and characterization of new families of organic alkaline salts for Charge Transfer Complexes in battery applications

Résumé

In the current climate context, different strategies were set-up to generate and store energy in a more responsible way, specifically in our transition away from thermic vehicles. To this day, the golden standard in the industry for alternative solutions of electricity storage for transportation remains lithium-ion batteries.[1] However, the rising demand for the mass production of portable electronic devices and electric vehicles now leads to new expectations.[2] Research is now focusing on the development of All-Solid-Sate Batteries expected to improve safety[3] while ensuring higher energy densities.[4] Polymer-based electrolytes have gathered great attention since the first report of lithium ion conductivity in poly(ethylene oxide) in the 1970s. More recently, organic charge-transfer complexes (CTCs) have been reported with promising super-ionic conductivity in the solid-state at room temperature by associating a donor/acceptor organic couple with a lithium salt.[5] These specific chemical structures hold a great potential to tune their electrochemical properties by changing the different partners (acceptor, donor and Li salt) and their molar ratios in the CTC. In this work, we synthesized two new families of organic alkaline salts (Li, Na, K) derived from the aromatic unit of chloranil, frequently used as an acceptor in CTC species. One family holds anionic trifluoromethanesulfonamide moieties, used as mimics of the LiTFSI salt. The other utilizes malononitrile functional groups to obtain fluorinefree compounds as an answer for governmental restrictions on the use of polyfluoroalkyl substances (PFAS).Ionic conduction properties of these organic salts were tested in standard battery applications, including in liquid, gel and solid electrolytes. Finally, we used them to develop charge-transfer complexes with different donor partners and compared their ionic conductivities to the state-of the art CTC electrolytes. References [1] B. Owens, Nature, 526, (2015), S89. [2] E. Fan et al., Chem. Rev., 120, (2020),7020-7063. [3] L. Yue et al., Energy Storage Mater., 5, (2016), 139-165. [4] S. Xia et al., Chem, 5, (2019), 753-785. [5] K. Hatakeyama-Sato et al., npj Comput. Mater., 8, (2022), 170.
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Dates et versions

cea-04719772 , version 1 (03-10-2024)

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  • HAL Id : cea-04719772 , version 1

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Romain Kunert, Noëline Tessier, Lionel Picard, Laurent Bernard. Development and characterization of new families of organic alkaline salts for Charge Transfer Complexes in battery applications. ISPE 18 - 18th International Symposium on Polymer Electrolytes, Jun 2024, Langkawi, Kuah, Malaysia. ⟨cea-04719772⟩
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