Plastic–polymer composite electrolytes: Novel soft matter electrolytes for rechargeable lithium batteries

Patel, Monalisa ; Bhattacharyya, Aninda J. (2008) Plastic–polymer composite electrolytes: Novel soft matter electrolytes for rechargeable lithium batteries Electrochemistry Communications, 10 (12). pp. 1912-1915. ISSN 1388-2481

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Official URL: http://doi.org/10.1016/j.elecom.2008.10.009

Related URL: http://dx.doi.org/10.1016/j.elecom.2008.10.009

Abstract

We present here a soft matter solid composite electrolyte obtained by inclusion of a polymer in a semi-solid organic plastic lithium salt electrolyte. Compared to lithium bis-trifluoromethanesulfonimide-succinonitrile (LiTFSI-SN), the (100 − x)%-[LiTFSI-SN]: x%-P (P: polyacrylonitrile (PAN), polyethylene oxide (PEO), polyethylene glycol dimethyl ether (PEG)) composites possess higher ambient temperature ionic conductivity, higher mechanical strength and wider electrochemical window. At 25 °C, ionic conductivity of 95%-[0.4 M LiTFSI-SN]: 5%-PAN was 1.3 × 10−3 Ω−1 cm−1 which was twice that of LiTFSI-SN. The Young’s modulus (Y) increased from Y → 0 for LiTFSI-SN to a maximum ∼1.0 MPa for (100 − x)%-[0.4 M LiTFSI-SN]: x%-PAN samples. The electrochemical voltage window for composites was approximately 5 V (Li/Li+). Excellent galvanostatic charge/discharge cycling performance was obtained with composite electrolytes in Li|LiFePO4 cells without any separator.

Item Type:Article
Source:Copyright of this article belongs to Elsevier B.V.
Keywords:Solid Composite Electrolytes; Plastic Crystals; Ionic Conductivity; Mechanical Property; Rechargeable Lithium Battery.
ID Code:116896
Deposited On:20 May 2021 05:13
Last Modified:20 May 2021 05:13

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