Dual protection of sulfur by interconnected porous carbon nanorods and graphene sheets for lithium-sulfur batteries

Xiangyang Zhou; Feng Chen; Juan Yang; Lulu Ma; Tao Bai; Bo Long; Qunchao Liao; Chongwu Liu

doi:10.1016/j.jelechem.2015.04.003

Dual protection of sulfur by interconnected porous carbon nanorods and graphene sheets for lithium-sulfur batteries

Xiangyang Zhou
, Feng Chen
, Juan Yang^*
, Lulu Ma
, Tao Bai
, Bo Long
, Qunchao Liao
, Chongwu Liu

^*Corresponding author for this work

Central South University
Hunan Rare Earth Metal Material Research Institute

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

A low-cost carbon/sulfur material has been prepared using interconnected porous carbon nanorods (PCNRs) as the framework, and self-assembled graphene sheets (GS) as the coating layer. This GS@PCNRs/S sulfur cathode exhibits excellent rate capability and cycle stability. It delivers a maximum discharge capacity of 549.9 mAh g^-1 at 1 C and keeps superior cyclability over 500 cycles with an average capacity fading rate of only 0.083% per cycle. The improved electrochemical performance is primarily attributed to the wrapped, internally porous architecture of GS@PCNRs/S, which not only can offer an excellent transport of lithium ions and electrons within the electrodes, but also can inhibit polysulfide diffusion by the external chemical and physical barrier of graphene sheets.

Original language	English
Pages (from-to)	59-67
Number of pages	9
Journal	Journal of Electroanalytical Chemistry
Volume	747
DOIs	https://doi.org/10.1016/j.jelechem.2015.04.003
State	Published - 2 Jun 2015
Externally published	Yes

Keywords

Graphene coating
Hierarchical porous carbon
Lithium-sulfur batteries
Polysulfide diffusion
Sulfur composite

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10.1016/j.jelechem.2015.04.003

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title = "Dual protection of sulfur by interconnected porous carbon nanorods and graphene sheets for lithium-sulfur batteries",

abstract = "A low-cost carbon/sulfur material has been prepared using interconnected porous carbon nanorods (PCNRs) as the framework, and self-assembled graphene sheets (GS) as the coating layer. This GS@PCNRs/S sulfur cathode exhibits excellent rate capability and cycle stability. It delivers a maximum discharge capacity of 549.9 mAh g-1 at 1 C and keeps superior cyclability over 500 cycles with an average capacity fading rate of only 0.083\% per cycle. The improved electrochemical performance is primarily attributed to the wrapped, internally porous architecture of GS@PCNRs/S, which not only can offer an excellent transport of lithium ions and electrons within the electrodes, but also can inhibit polysulfide diffusion by the external chemical and physical barrier of graphene sheets.",

keywords = "Graphene coating, Hierarchical porous carbon, Lithium-sulfur batteries, Polysulfide diffusion, Sulfur composite",

author = "Xiangyang Zhou and Feng Chen and Juan Yang and Lulu Ma and Tao Bai and Bo Long and Qunchao Liao and Chongwu Liu",

note = "Publisher Copyright: {\textcopyright} 2015 Published by Elsevier B.V.",

year = "2015",

month = jun,

day = "2",

doi = "10.1016/j.jelechem.2015.04.003",

language = "英语",

volume = "747",

pages = "59--67",

journal = "Journal of Electroanalytical Chemistry",

issn = "1572-6657",

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TY - JOUR

T1 - Dual protection of sulfur by interconnected porous carbon nanorods and graphene sheets for lithium-sulfur batteries

AU - Zhou, Xiangyang

AU - Chen, Feng

AU - Yang, Juan

AU - Ma, Lulu

AU - Bai, Tao

AU - Long, Bo

AU - Liao, Qunchao

AU - Liu, Chongwu

PY - 2015/6/2

Y1 - 2015/6/2

N2 - A low-cost carbon/sulfur material has been prepared using interconnected porous carbon nanorods (PCNRs) as the framework, and self-assembled graphene sheets (GS) as the coating layer. This GS@PCNRs/S sulfur cathode exhibits excellent rate capability and cycle stability. It delivers a maximum discharge capacity of 549.9 mAh g-1 at 1 C and keeps superior cyclability over 500 cycles with an average capacity fading rate of only 0.083% per cycle. The improved electrochemical performance is primarily attributed to the wrapped, internally porous architecture of GS@PCNRs/S, which not only can offer an excellent transport of lithium ions and electrons within the electrodes, but also can inhibit polysulfide diffusion by the external chemical and physical barrier of graphene sheets.

AB - A low-cost carbon/sulfur material has been prepared using interconnected porous carbon nanorods (PCNRs) as the framework, and self-assembled graphene sheets (GS) as the coating layer. This GS@PCNRs/S sulfur cathode exhibits excellent rate capability and cycle stability. It delivers a maximum discharge capacity of 549.9 mAh g-1 at 1 C and keeps superior cyclability over 500 cycles with an average capacity fading rate of only 0.083% per cycle. The improved electrochemical performance is primarily attributed to the wrapped, internally porous architecture of GS@PCNRs/S, which not only can offer an excellent transport of lithium ions and electrons within the electrodes, but also can inhibit polysulfide diffusion by the external chemical and physical barrier of graphene sheets.

KW - Graphene coating

KW - Hierarchical porous carbon

KW - Lithium-sulfur batteries

KW - Polysulfide diffusion

KW - Sulfur composite

UR - https://www.scopus.com/pages/publications/84930664608

U2 - 10.1016/j.jelechem.2015.04.003

DO - 10.1016/j.jelechem.2015.04.003

M3 - 文章

AN - SCOPUS:84930664608

SN - 1572-6657

VL - 747

SP - 59

EP - 67

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

ER -

Dual protection of sulfur by interconnected porous carbon nanorods and graphene sheets for lithium-sulfur batteries

Abstract

Keywords

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