In this work, we develop an approach to synthesize a nanoscale structure with Sb nanocrystals and polypyrrole nano-network (Sb@ppy NNW) from the reduction of SbCl3 and the polymerization and crosslinking of pyrrole. The Sb@ppy NNW exhibits excellent electrochemical characteristics with incessant conduction paths for fast transfer of electrons, short paths for fast diffusion/migration of ions and large contact area between active material and electrolyte for the storage of Na/Li. The Sb@ppy NNW is used as active material in the working electrode for lithium-ion half cells and sodium-ion half cells. The sodium-ion half cells possess excellent cycling stability with a high specific capacity of 510 mA h g-1 at a current density of 100 mA g-1 and 463 mA h g-1 after 100 cycles at a current density of 500 mA g-1, and superior rate performance with a specific capacity of 635.6 mA h g-1 even at a current density of 1600 mA g-1. The specific capacities for the lithium-ion half cells are 660 mA h g-1 after 100 cycles at a current density of 100 mA g-1 and 635.6 mA h g-1 even at a current density of 1600 mA g-1
|Journal||Journal of the Electrochemical Society|
|State||Published - Jan 23 2020|
Bibliographical noteFunding Information:
This work was supported by National Natural Science Foundation of China [grant numbers 51301117, 11502158, 51671140]; the International Cooperation Project Foundation of Shanxi Province China [grant numbers 201603D421037, 2015081053]; the Top Young Academic Leaders of Shanxi and the 1331 project Key Innovation Teams of Shanxi Province; the Higher School Science and Technology Innovation Project Foundation of Shanxi Province China [grant number 2016128]; and the Research Project Supported by Shanxi Scholarship Council of China [grant 2015 034]. F.Y. is grateful for the support by the NSF through the grant CMMI-1634540, monitored by Dr Khershed Cooper.
© 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry