硫化铋/氧化石墨烯/聚（3,4-乙撑二氧噻吩）复合材料增强的锂离子存储能力
Enhanced Lithium-Ion Storage Capability of a Bismuth Sulfide/Graphene Oxide/Poly(3,4-ethylenedioxythiophene) Composite.
作者信息
Mukkabla Radha, Deepa Melepurath, Srivastava Avanish Kumar
机构信息
Department of Chemistry, Indian Institute of Technology Hyderabad, Ordnance Factory Estate, Yedduaram, 502205, Telangana, India), Fax: +91-40-23016003, Tel: +91-40-023016024.
CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi, 110012, India.
出版信息
Chemphyschem. 2015 Oct 26;16(15):3242-53. doi: 10.1002/cphc.201500515. Epub 2015 Sep 2.
A Bi2 S3 /graphene oxide (GO) composite enwrapped by a poly(3,4-ethylenedioxythiophene) (PEDOT) coating was prepared for the first time for use as an anode in Li-ion batteries. Pristine Bi2 S3 nanoflowers and composites of Bi2 S3 /GO and Bi2 S3 /GO/PEDOT were assembled into half cells with Li metal as the counter electrode, and initial discharge capacities of 833, 1020, and 1300 mAh g(-1) , respectively, were obtained. Composites of Bi2 S3 /GO/PEDOT and Bi2 S3 /GO showed superior cycling stability and better rate capability than pristine Bi2 S3 . GO provides highly conducting interconnections, which allow facile propagation of electrons during charge/discharge, and this improves the ion-uptake capability of the Bi2 S3 nanoflowers and also increases the rate capability. PEDOT furnishes a protective coating that prevents detachment of the material from the current collector during cycling, and it also imparts better cycling stability to the Bi2 S3 /GO/PEDOT composite.
首次制备了一种被聚（3,4 - 亚乙基二氧噻吩）（PEDOT）包覆的Bi₂S₃/氧化石墨烯（GO）复合材料，用作锂离子电池的阳极。将原始的Bi₂S₃纳米花以及Bi₂S₃/GO和Bi₂S₃/GO/PEDOT复合材料与锂金属作为对电极组装成半电池，分别获得了833、1020和1300 mAh g⁻¹的初始放电容量。Bi₂S₃/GO/PEDOT和Bi₂S₃/GO复合材料表现出比原始Bi₂S₃更优异的循环稳定性和更好的倍率性能。GO提供了高导电互连，使得在充电/放电过程中电子能够轻松传播，这提高了Bi₂S₃纳米花的离子吸收能力，也提高了倍率性能。PEDOT提供了一层保护涂层，可防止材料在循环过程中从集流体上脱落，并且还赋予Bi₂S₃/GO/PEDOT复合材料更好的循环稳定性。
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