A non-aqueous Li/organosulfur semi-solid flow battery |
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Authors: | Chenhui Wang Qinzhi Lai Pengcheng Xu Xianfeng Li Huamin Zhang |
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Affiliation: | a Division of energy storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;b Collaborative Innovation Centre of Chemistry for Energy Materials(iChEM), Dalian 116023, China;c University of Chinese Academy of Sciences, Beijing 100039, China |
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Abstract: | Non-aqueous flow batteries have attracted extensive attention due to the advantages of wide voltage window, high energy density and wide operating temperature and so on. Herein, tetramethylthiuram disulfide (TMTD) with high intrinsic capacity (223 mAh/g) and high solubility (~1 mol/L in chloroform) is investigated as the positive active material of the non-aqueous Li/disulfide semi-solid flow battery. The electrochemical activity and reversibility are investigated by cyclic voltammetry and linear scan voltammetry. This Li/TMTD battery with a high cell voltage of 3.36 V achieves coulombic efficiency of 99%, voltage efficiency of 73% and energy efficiency of 72% at the current density of 5 mA/cm2 with active material concentration of 0.1 mol/L. Moreover, the Li/TMTD battery can operate for 100 cycles without obvious efficiency decay, indicating good stability. |
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Keywords: | Energy storage Batteries Organosulfur High energy density High cell voltage |
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