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A porous 3D-RGO@MWCNT hybrid material as Li-S battery cathode.

ABSTRACT: In this work, a unique three-dimensional (3D) structured carbon-based composite was synthesized. In the composite, multiwalled carbon nanotubes (MWCNT) form a lattice matrix in which porous spherical reduced graphene oxide (RGO) completes the 3D structure. When used in Li-S batteries, the 3D porous lattice matrix not only accommodates a high content of sulfur, but also induces a confinement effect towards polysulfide, and thereby reduces the "shuttle effect". The as-prepared S-3D-RGO@MWCNT composite delivers an initial specific capacity of 1102 mAh·g^-1. After 200 charging/discharge cycles, a capacity of 805 mAh·g^-1 and a coulombic efficiency of 98% were maintained, implying the shuttle effect was greatly suppressed by the composite matrix. In addition, the S-3D-RGO@MWCNT composite also exhibits an excellent rate capability.

SUBMITTER: Zhang Y

PROVIDER: S-EPMC6404391 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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A porous 3D-RGO@MWCNT hybrid material as Li-S battery cathode.

Zhang Yongguang Y Ren Jun J Zhao Yan Y Tan Taizhe T Yin Fuxing F Wang Yichao Y

Beilstein journal of nanotechnology 20190221

In this work, a unique three-dimensional (3D) structured carbon-based composite was synthesized. In the composite, multiwalled carbon nanotubes (MWCNT) form a lattice matrix in which porous spherical reduced graphene oxide (RGO) completes the 3D structure. When used in Li-S batteries, the 3D porous lattice matrix not only accommodates a high content of sulfur, but also induces a confinement effect towards polysulfide, and thereby reduces the "shuttle effect". The as-prepared S-3D-RGO@MWCNT compo ...[more]

PMID: 30873323

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