Anode Based on Porous Silicon Films Using Polymer Electrolyte for Lithium-Ion Microbatteries. (7th August 2015)

• Record Type: Journal Article
• Authors: Chaudoy, V.; Luais, Erwann; Ghamouss, F.; Defforge, Thomas; Desplobain, S.; Gautier, G.; Wolfman, J.; Houdbert, J.-C.; Tran-Van, François; Sakai, J.
• Is Part Of: ECS transactions. Volume 66:Number 8(2015)
• Page Start: 31
• Page End: 39
• Publication Date: 2015-08-07
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06608.0031ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : In this paper, the preparation of an all solid-state lithium-ion microbattery is presented with original core materials : a gel polymer electrolyte (GPE) and a macroporous silicon (pSi) as the anode. The preparation and the synthesis of GPE consist of solubilizing a linear polymer (PVdF-HFP : poly(vinylidene fluoride-co-hexafluoropropylene) with an ionic liquid (P13FSI : Pyrrolidinium bis(fluorosulfonyl)imide) and a lithium salt (LiTFSI : lithium bis-trifluoromethanesulfonimide). The polymer film is transparent, self-supported and presents an ionic conductivity of 1.88 mS.cm -2 at 25°C. GPE compatibility with a Li/LiCoO2 system, with a Li/pSi half-cell and finally with a pSi/LiCoO2 lithium-ion microbattery, is demonstrated through 30 galvanostatic cycles. The full cell reaches a discharge capacity of 173 µAh/cm 2 at 167 µA/cm 2 with a coulombic efficiency upper than 99 % after 7 cycles of charge and discharge.