Vanadium carbide nanoparticles incorporation in carbon nanofibers for room-temperature sodium sulfur batteries: Confining, trapping, and catalyzing

被引：57

作者：

Tang, Wenwen ^{[1
]}

Zhong, Wei ^{[1
]}

Wu, Yuanke ^{[1
]}

Qi, Yuruo ^{[1
]}

Guo, Bingshu ^{[1
]}

Liu, Dingyu ^{[1
]}

Bao, Shu-Juan ^{[1
]}

Xu, Maowen ^{[1
]}

机构：

[1] Southwest Univ, Sch Mat & Energy, Minist Educ, Key Lab Luminescent & Real Time Analyt Chem, Chongqing 400715, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2020年 / 395卷

基金：

中国国家自然科学基金;

关键词：

Room temperature Na-S batteries; Effective catalysis; Reaction kinetics; Freestanding cathode; PERFORMANCE; COMPOSITE;

D O I：

10.1016/j.cej.2020.124978

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Room-temperature sodium-sulfur (RT Na-S) batteries have aroused extensive interest from researchers owing to the high theoretical volumetric energy density, nontoxicity and low-cost. However, poor conductivity of sulfur and high solubility of polysulfides in electrolyte are two major challenges for the practical application of the RT Na-S batteries. Herein, we report a three dimensional self-supported structure with Vanadium carbide (VC) nanoparticles embedded in carbon nanofibers for RT Na-S batteries. Finally, the VC-CNFs@S electrode displays a reversible capacity of 379 mAh g(-1) after 2000 cycles at 0.5C with a high capacity retention of 96.2%. Such outstanding electrochemical property is ascribed to the "confining - trapping - catalyzing" effect of VC-CNFs structure.

引用

页数：6

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