Tungsten oxide/nitrogen-doped carbon nanotubes composite catalysts for enhanced redox kinetics in lithium-sulfur batteries

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外文摘要：The sluggish redox kinetics of polysulfides in lithium-sulfur(Li-S)batteries are a significant obstacle to their widespread adoption as energy storage devices.However,recent studies have shown that tungsten oxide(WO3)can facilitate the conversion kinetics of polysulfides in Li-S batteries.Herein,we fabricated host materials for sulfur using nitrogen-doped carbon nanotubes(N-CNTs)and WO3.We used low-cost components and simple procedures to overcome the poor electrical conductivity that is a disadvantage of metal oxides.The composites of WO3 and N-CNTs(WO3/N-CNTs)create a stable framework structure,fast ion diffusion channels,and a 3D electron transport network during electrochemical reaction pro-cesses.As a result,the WO3/N-CNT-Li2S6 cathode demonstrates high initial capacity(1162 mA·h·g-1 at 0.5 C),excellent rate performance(618 mA·h·g-1 at 5.5 C),and a low capacity decay rate(0.093％up to 600 cycles at 2 C).This work presents a novel approach for preparing tungsten oxide/carbon composite catalysts that facilitate the redox kinetics of polysulfide conversion.

外文关键词：

Li-S batteriesCompositesIon diffusion channels3D electron transport networkRedox kinetics

作者：

Deqing He、Zihao Xie、Qian Yang、Wei Wang、Chao Su

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作者单位：

School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,China

State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China

基金：

Open Project Program of the State Key Laboratory of Materials-Oriented Chemical EngineeringInstrumental Analysis Center,Jiangsu University of Science and Technology

项目编号：

KL21-05

出版年：

2024

DOI：

10.1016/j.cjche.2023.11.022

中国化学工程学报(英文版)

中国化工学会

中国化学工程学报(英文版)

CSTPCDEI

影响因子：0.818

ISSN：1004-9541

年,卷(期)：2024.67(3)

参考文献量41