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The composite of Ketjen black and Ti4O7-modified separator for enhancing the electrochemical properties of lithium sulfur battery by Xiao Wu; Shanshan Yao; Mingquan Liu; Shengli Pang; Xiangqian Shen; Tianbao Li; Shibiao Qin is a Engineering article available to read on EtoBox.

What is The composite of Ketjen black and Ti4O7-modified separator for enhancing the electrochemical properties of lithium sulfur battery about?

The large-scale manufacturing of lithium sulfur (Li-S) battery has been long hampered by the rapid capacity degradation and short cycle life, which is primarily attributed to the soluble polysulfides and subsequent continuing shuttling effect. The separator modification as a simple and effective technique has been extensively applied in Li-S batteries to solve inherent defects. Herein, the composite of Ketjen black (KB) and Ti 4 O 7 was synthetized by carbothermal reduction and made into KB/Ti 4 O 7 -modified separator. The multifunctional layer can improve utilization of active substances and restrain shuttling effect by forming synergistic effect of physical obstruct and chemisorption for polysulides. The cell using KB/Ti 4 O 7 separator exhibits enhanced electrochemical properties reflecting in higher specific capacity (1074 mAh g -1 at 1C) and longer cycling life (836 mAh g -1 after 100 cycles). The above results indicate that the composite of carbon and metallic oxide modified separator is pretty suitable for advanced Li-S battery.

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Author

Xiao Wu; Shanshan Yao; Mingquan Liu; Shengli Pang; Xiangqian Shen; Tianbao Li; Shibiao Qin

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Engineering (Physical Sciences)