Cobalt nanoparticles embedded into free-standing carbon nanofibers as catalyst for room-temperature sodium-sulfur batteries

被引：42

作者：

Du, Wenyan ^{[1
]}

Gao, Wei ^{[1
]}

Yang, Tingting ^{[1
]}

Guo, Bingshu ^{[1
]}

Zhang, Longzhen ^{[1
]}

Bao, Shu-juan ^{[1
]}

Chen, Yuming ^{[2
]}

Xu, Maowen ^{[1
]}

机构：

[1] Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Dept Nucl Sci & Engn, Chongqing 400715, Peoples R China

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2020年 / 565卷

基金：

中国国家自然科学基金;

关键词：

Free standing; Co nanoparticles; Reaction kinetics; Sodium-sulfur batteries;

D O I：

10.1016/j.jcis.2020.01.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Room-temperature sodium-sulfur (RT Na-S) batteries are seriously limited because of poor conductivity of sulfur and sluggish reaction kinetics of polysulfide intermediates. Here, we design a free-standing film, constructed from Co nanoparticles onto nitrogen-doped porous carbon nanofibers (Co@NPCNFs), to load sulfur for RT Na-S batteries. Experiment result shows that Co as catalyst can enable the rapid sodium intercalation and fast reduction reaction of the polysulfides during cycling. Hence, the prepared Co@NPCNFs/S cathode exhibits a remarkable capacity of 906 mAh g(-1) at 0.1 C and long cycling life up to 800 cycles with a slow capacity decay of 0.038% per cycle at 1 C. (C) 2020 Elsevier Inc. All rights reserved.

引用

页码：63 / 69

页数：7

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