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30 °C, using a Bio-Logic Instruments VSP potentiostat. The charge increment (δQ) was calculated by time integration of the current. Cyclic voltammetry measurements of Li-S cells were conducted at a scan rate of 0.2 mV s−1 in the range of 1.8–2.8 V at 30 °C. Cathodes were punched into 1.267 cm2 diameter disks and weighed to acquire the accurate sulfur loading for each piece. Added volume of electrolytes was determined by the sulfur loading, based on the E/S ratios, with a digital micropipette (Nichipet EX II 100, 10–100 μL, Nichiryo Co., Ltd.). Half-cells with 200 μm thick Li metal foil (MTI Corporation) as the anode and polyethylene (Asahi Kasai, Japan) as the separator were assembled using CR2032 coin cells in an MBraun LABmaster glove box with an Ar atmosphere (<1 ppm O2 and <1 ppm H2O). In the LiǀǀCu cell without the polyethylene separator, a thin polypropylene spacer r with a central hole was used to eliminate effects of a separator and crimping pressure on the morphology of Li electrodeposits. The galvanostatic discharge/charge cycles were tested using a LANHE battery tester in an incubator at 30 °C. Page 14 of 24PDF Image | A lithium-sulfur battery with a solution-mediated pathway
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