多硫化物
阴极
电解质
材料科学
吸附
催化作用
基质(水族馆)
化学工程
阳极
硫黄
带隙
锂(药物)
纳米技术
电极
化学
光电子学
物理化学
有机化学
地质学
工程类
内分泌学
海洋学
冶金
医学
作者
Tan Wang,Sibo Zhang,Xiaoshi Lang,Lan Li,Chuangang Yao,Kedi Cai
标识
DOI:10.1149/1945-7111/ac5850
摘要
To tackle the issues of lithium sulfur battery (Li-S), a strategy of simultaneous regulating the band gap and catalytic activity of TiO 2 via embedded MoO 2 based on interlaced carbon nanotubes carrier as substrate material to achieve efficient adsorption has been proposed. This substrate material is controlled to be nanosized with abundant catalytically active sites and widely-distributed pore through the cross-linked porous conductive skeleton, further promoting the electrolyte penetration and charge transfer. In addition, the introduction of MoO 2 tailors the Ti electronic states, so the substrate material renders high adsorption energy of −1.47 eV for Li 2 S 6 by theoretical calculation. Furthermore, the cathode exhibits high conversion efficiency from long-chain lithium polysulfide to Li 2 S (Q low /Q high (the conversion capacity of Li 2 S) is 2.91 at 0.1C) and excellent sulfur utilization and fast sulfur reaction kinetics. The cathode also exhibits a low-capacity fade and excellent cycling performance.
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