期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 7, 页码 3659-3666出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta06384h
关键词
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资金
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) [IRT1161]
- Program of Science and Technology Innovation Team in Bingtuan [2011CC001]
- National Natural Science Foundation of China [21263021, U1303291]
Nanostructured electrode materials have been extensively studied with the aim of enhancing lithium ion and electron transport and lowering the stress caused by their volume changes during the charge-discharge processes of electrodes in lithium-ion batteries. In this work, novel two-dimensional nanocomposite, polyaniline-coated SnS2 (SnS2@PANI) nanoplates have been prepared by an in situ oxidative polymerization of aniline on the surface of ultrasonic exfoliated SnS2 nanoplates. The SnS2@PANI nanoplates present a lamellar sandwich nanostructure, which can provide a good conductive network between neighboring nanoplates, shorten the path for ion transport in the active material, and alleviate the expansion and contraction of the electrode material during charge-discharge processes, leading to improved electrochemical performance. As an anode material for lithium-ion batteries, SnS2@PANI nanoplates have a high initial reversible capacity (968.7 mA h g(-1)), excellent cyclability (730.8 mA h g(-1) after 80 cycles, corresponding to 75.4% of the initial reversible capacity), and an extraordinary rate capability (356.1 mA h g(-1) at the rate of 5000 mA g(-1)). This study not only provides a simple and efficient synthesis strategy for various inorganic-organic composites obtained by the exfoliation of layered inorganic materials, but can also help in the design of novel, high performance electrode materials.
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