Details

Autor(en) / Beteiligte

• Wang, D.H.
• Xia, X.H.
• Xie, D.
• Niu, X.Q.
• Ge, X.
• Gu, C.D.
• Wang, X.L.
• Tu, J.P.

Titel

Rational in-situ construction of three-dimensional reduced graphene oxide supported Li2S/C composite as enhanced cathode for rechargeable lithium–sulfur batteries

Ist Teil von

• Journal of power sources, 2015-12, Vol.299, p.293-300

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2015

Quelle

ScienceDirect

Beschreibungen/Notizen

• The construction of advanced cathode materials is indispensable and vital for developing high-performance lithium–sulfur batteries. Herein, we develop a facile in-situ route to synthesize three-dimensional reduced graphene oxide supported Li2S/carbon composite (3D-rGO-Li2S/C). The Li2S/C nanoparticles are intimately anchored on the surface of 3D-rGO forming an integrated 3D porous composite. Due to the improved conductivity and reduced polysulfide dissolution, the 3D-rGO-Li2S/C cathode exhibits enhanced electrochemical performances with a high initial capacity of 819 mAh g−1 at 0.1C, as well as good cycling stability with a capacity retention of 415 mAh g−1 after 100 cycles at 1C. The integrated 3D conductive network is responsible for the enhancement of the electrochemical properties by providing fast ion/electron transfer and high mechanical stability. •3D-rGO-Li2S/C composite is synthesized through a facile in-situ method.•3D-rGO network provides reaction sites and a conductive network.•The 3D-rGO-Li2S/C shows better electrochemical performance than Li2S + C.