电池(电)
电解质
锂硫电池
比能量
电化学
阴极
储能
容量损失
原电池
能量密度
化学
硫黄
材料科学
化学工程
电极
热力学
工程物理
功率(物理)
工程类
物理化学
有机化学
物理
细胞
生物化学
作者
H. Merve Bilal,Damla Eroğlu
标识
DOI:10.1149/1945-7111/abe7a2
摘要
Lithium-Sulfur (Li-S) battery performance is greatly sensitive to cell design as a result of the highly complex reaction and shuttle mechanisms within the cathode. Electrolyte-to-sulfur (E/S) ratio is one of the key design parameters that have a great impact on the performance of Li-S batteries. Here, an integrated research methodology coupling experimental characterization and electrochemical modeling is applied to forecast the relation between the E/S ratio and the discharge capacity, cycling performance and cell- and system-level specific energy and energy density of the Li-S battery. The highest initial discharge capacity is achieved with an E/S ratio of 20 μ l mg −1 , whereas, the best capacity retention is observed for 13 μ l mg −1 . This experimentally obtained link between the E/S ratio and the discharge performance is taken into consideration in the proposed cell- and system-level performance models. Lower E/S ratios lead to higher battery performance at the cell and system level. Consequently, an E/S ratio of 13 μ l mg −1 presents the best performance as the impact of E/S ratio not only on the peak discharge capacity and capacity retention but also on the specific energy and energy density at the cell and system level are all considered.
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