TY  - JOUR
AU  - Zhang, Tong
AU  - Porcher, Willy
AU  - Paillard, Elie
TI  - Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation
JO  - Journal of power sources
VL  - 395
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2019-03443
SP  - 212 - 220
PY  - 2018
AB  - Sulfolane (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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000438001800024
DO  - DOI:10.1016/j.jpowsour.2018.05.077
UR  - https://juser.fz-juelich.de/record/863370
ER  -