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Article dans une revue
Superior Electrochemical Performance of Thin-Film Thermoplastic Elastomer-Coated SnSb as an Anode for Li-ion Batteries
Abstract : The high failure strain of thermoplastic elastomers (TPEs) is a very desirable feature for rechargeable Li-ion batteries by improving the lifetime of high specific capacity anode materials that undergo mechanical fractures induced by large volume variations. In this work, poly(styrene-b-2-hydroxyethyl acrylate) called PS-b-PHEA was synthesized by a nitroxide meditated polymerization method. Owing to the use of a specific polystyrene macroinitiator (SG1), a suitable TPE copolymer with long hydroxyethyl acrylate blocks to ensure good mechanical properties is obtained for the first time. We show that the electrochemical properties of the PS-b-PHEA-coated SnSb anode are drastically improved by suppressing the crack formation at the surface of the electrode. Indeed, electrochemical characterization revealed that a high and stable gravimetric capacity over 100 cycles could be achieved. Moreover, excellent capacity reversibility was achieved when cycled at multiple C-rates and fast kinetics confirming the strong protection role of the polymer. The advanced chemical and mechanical properties of PS-b-PHEA open up promising perspectives to significantly improve the electrochemical performance of all electrodes that are known to suffer from large volume variations.
Littérature citée [44 références]
https://hal.umontpellier.fr/hal-02082253
Contributeur : Odile Hennaut <>
Soumis le : jeudi 2 juillet 2020 - 17:19:13
Dernière modification le : jeudi 9 juillet 2020 - 14:34:25
Archivage à long terme le : : jeudi 24 septembre 2020 - 05:45:37
Contributeur : Odile Hennaut <>
Soumis le : jeudi 2 juillet 2020 - 17:19:13
Dernière modification le : jeudi 9 juillet 2020 - 14:34:25
Archivage à long terme le : : jeudi 24 septembre 2020 - 05:45:37
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