Semi-liquid configuration of sulfur cell is proposed as simple strategy to develop high-energy lithium battery. Two solutions of Li₂S₈ in diethylene glycol dimethyl ether (DEGDME), containing either lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) or lithium trifluoromethansulfonate (LiCF₃SO₃) and lithium nitrate (LiNO₃), are studied as catholytes for Li/S cells exploiting the polysulfides electrochemical reaction at about 2.2 V vs. Li⁺/Li. X-ray photoelectron spectroscopy (XPS) and thermal analyses, respectively, reveal composition and high-temperature stability of the catholyte solutions. Ad hoc study conducted by impedance spectroscopy, voltammetry, and galvanostatic techniques suggests well suitable characteristics in terms of Li⁺-transport ability, electrochemical stability window, and electrode/electrolyte interphase features. Cells with sulfur loading ranging from about 3 to 6 mg cm⁻² into the solution are successfully studied with remarkable performances in terms of current rates, efficiency and cycle life. Hence, the lithium cells based on the catholyte deliver maximum capacity of the order of 1100 mAh g_S⁻¹ at C/10 rate and stable capacity of about 800 mAh g_S⁻¹ at C/3 rate with Coulombic efficiency exceeding 99%. Therefore, the catholyte solutions studied herein are considered as a very promising candidates for high-energy storage in next generation systems, such as the intriguing hybrid and electric vehicles.

硫电池的半液态结构被认为是开发高能锂电池的简单策略。研究了Li ₂ S ₈在二甘醇二甲醚（DEGDME）中的两种溶液，它们分别含有双（三氟甲磺酰基）亚胺酸锂（LiTFSI）或三氟甲磺酸锂（LiCF ₃ SO ₃）和硝酸锂（LiNO ₃）。 / S电池在约2.2 V vs.的条件下利用多硫化物电化学反应。李⁺ /李。X射线光电子能谱（XPS）和热分析分别揭示了阴极电解液的组成和高温稳定性。特别指定通过阻抗光谱法，伏安法和恒电流技术进行的研究表明，在Li ⁺传输能力，电化学稳定性窗口和电极/电解质界面特性方面，非常合适的特性。成功地研究了硫在溶液中的负载量为3至6 mg cm ^-2的电池，并在电流速率，效率和循环寿命方面表现出非凡的性能。因此，基于阴极电解液的锂电池 在C / 10速率下可提供约1100 mAh g _S ^-1的最大容量，并具有约800 mAh g _S ^-1的稳定容量。 以C / 3的速率，库仑效率超过99％。因此，本文研究的阴极溶液被认为是下一代系统（如耐人寻味的混合动力和电动汽车）中高能存储的非常有前途的候选者。