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000863370 1001_ $$0P:(DE-Juel1)167369$$aZhang, Tong$$b0$$ufzj
000863370 245__ $$aTowards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation
000863370 260__ $$aNew York, NY [u.a.]$$bElsevier$$c2018
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000863370 520__ $$aSulfolane (tetramethylene sulfone, SL) is known for leading to Li-ion electrolytes with high anodic stability. However, the operation of graphite electrodes in alternative electrolytes is usually challenging, especially when ethylene carbonate (EC) is not used as co-solvent. Thus, we study here the influence of the lithium salt on the physico-chemical and electrochemical properties of EC-free SL-based electrolytes and on the performance of graphite electrodes based on carboxymethyl cellulose (CMC). SL mixed with dimethyl carbonate (DMC) leads to electrolytes as conductive as state-of-the-art alkyl carbonate-based electrolytes with wide electrochemical stability windows. The compatibility with graphite electrodes depends on the Li salt used and, even though cycling is possible with most salts, lithium difluoro-oxalato borate (LiDFOB) is especially interesting for graphite operation. LiDFOB electrolytes are conductive at room temperature (ca. 6 mS cm−1) with an anodic stability slightly below 5 V vs. Li/Li+ on particulate carbon black electrodes. In addition, it allows cycling graphite electrodes with steady capacity and high coulombic efficiency without any additive. The testing of graphite electrodes in half-cells is, however, problematic with SL:DMC mixtures and, by switching the Li metal counter electrode for LiFePO4, the graphite electrode achieves better practical performance in terms of rate capability.
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000863370 7001_ $$0P:(DE-HGF)0$$aPorcher, Willy$$b1
000863370 7001_ $$0P:(DE-Juel1)166311$$aPaillard, Elie$$b2$$eCorresponding author
000863370 773__ $$0PERI:(DE-600)1491915-1$$a10.1016/j.jpowsour.2018.05.077$$gVol. 395, p. 212 - 220$$p212 - 220$$tJournal of power sources$$v395$$x0378-7753$$y2018
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000863370 8564_ $$uhttps://juser.fz-juelich.de/record/863370/files/Choice%20of%20Li%20salt%20-%20R2_for%20repository.pdf$$yPublished on 2018-06-15. Available in OpenAccess from 2020-06-15.
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