Facile synthesis of TiN nanocrystals/graphene hybrid to chemically suppress the shuttle effect for lithium-sulfur batteries

JOURNAL OF ALLOYS AND COMPOUNDS

卷:822

Article

Tu, Jianxin¹  Li, Hejun¹  Lan, Tongbin^2,3  Zeng, Shao-Zhong^2,3  Zou, Jizhao^2,3  Zhang, Qi⁴  Zeng, Xierong^2,3 

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Carbon Carbon Composites Res Ctr, Xian 710072, Peoples R China

[2] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen Key Lab Special Funct Mat, Shenzhen 518060, Peoples R China

[3] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen Engn Lab Adv Technol Ceram, Shenzhen 518060, Peoples R China

[4] Cranfield Univ, Sch Aerosp Transport & Mfg, Cranfield MK43 0AL, Beds, England

关键词: Lithium-sulfur batteries;    Shuttle effect;    Titanium nitride;    Microwave reduction;    Chemisorption;   

DOI  :  10.1016/j.jallcom.2020.153751

来源: Elsevier

【 摘 要 】

Herein, we present a microwave reduction strategy for the synthesis of reduced-graphene-oxide (rGO) supported TiN nanoparticle hybrid (TiN/rGO) under N-2 atmosphere. The method involves GO reduction, metal oxide reduction and nitridation reaction in one single step. Due to TiN high conductivity and good interfacial affinity between it and lithium polysulfides (LiPSs), the prepared TiN/rGO-Sulfur (TiN/rGO-S) cathodes demonstrate rapid charge transfer, lower polarization, faster surface redox reaction kinetic and enhanced stability cycling performance than rGO-Sulfur (rGO-S) and TiO2/rGO-Sulfur (TiO2/rGO-S) cathodes. The initial capacity reaches 1197.6 mA h g(-1) with a reversible capacity of 888.7 mA h g(-1) being retained after 150 cycles at 0.1 C. (C) 2020 Elsevier B.V. All rights reserved.

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