Abstract
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
Original language | English |
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Article number | 020527 |
Journal | Journal of the Electrochemical Society |
Volume | 167 |
Issue number | 2 |
DOIs | |
State | Published - Jan 23 2020 |
Bibliographical note
Publisher Copyright:© 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Materials Chemistry
- Surfaces, Coatings and Films
- Electrochemistry
- Renewable Energy, Sustainability and the Environment