Integrated interconnected porous and lamellar structures realized fast ion/electron conductivity in high-performance lithium-sulfur batteries

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外文摘要：The practical application of high-energy-density lithium-sulfur(Li-S)batteries have been highly praised for energy storage devices,while are largely hindered by the"shuttling effect".Herein,core-shell carbon spheres composed of interlinked porous core and lamellar shell were designed to restrain the polysulfide shuttling.The microporous structure with pore size of around 1 nm effectively trap lithium polysulfides.Furthermore,the interconnected porous core shortens the ion transfer distance and the lamellar carbon shell endows the carbon spheres with fast electron conduction,finally facilitating polysulfide conversion kinetics.Therefore,the Li-S batteries with the carbon spheres as the interlayer show high discharge spe-cific capacity of 1002mAh/g at 2C with 574mAh/g remaining after 600 cycles,and high areal capacity of 5.48 mAh/cm2 with sulfur loading of 4.67 mg/cm2 at 0.1 C.The corresponding pouch cells also exhibit stable cycling stability with an initial discharge specific capacity of 1082 mAh/g at 0.1 C.

外文关键词：

InterlayerShuttle effectStrong adsorptionPorous carbon spheresLithium-sulfur batteries

作者：

Ya Song、Mingxia Zhou、Zhu Chen、Huali Nie、Jiao-Jing Shao、Guangmin Zhou

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作者单位：

School of Materials and Metallurgy,Guizhou University,Guiyang 550025,China

Medical College of Guizhou University,Guiyang 550025,China

College of Biological Science and Medical Engineering,Donghua University,Shanghai 201620,China

Shenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGuizhou Provincial High Level Innovative Talents ProjectInnovation Team for Advanced Electrochemical Energy Storage Devices and Key Materials of Guizhou Provincial Higher Education InsGuizhou Provincial Science and Technology ProjectsCultivation Project of Guizhou University

项目编号：

5197207052062004QKHPTRC-GCC[2022]013-1QianJiaoJi[2023]054QKHJC[2020]1Z042GDPY[2019]01

出版年：

2024

DOI：

10.1016/j.cclet.2023.109200

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(6)