Journal
ELECTROCHIMICA ACTA
Volume 389, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.138246
Keywords
Bimetallic alloy; Electrospinning; Carbon fibers; Sodium-ion battery; Full-cell
Categories
Funding
- National Natural Science Foundation of China [22075227]
- Industrial Innovation Chain of Key Research and Development Project of Shaanxi Province [2018ZDCXLGY0804, 2019ZDLGY1607]
- Key Science and Technology Innovation Team Project of Natural Science Foundation of Shaanxi Province [2017KCT01]
- Major Project of Shaanxi Coal Joint Fund of Shaanxi Provincial Science and Technology Department [2019JLZ07]
- Open fund of Key Laboratory of Synthetic and Natural Functional Molecule Chemistry [338050067 (2018e005)]
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The development of high-performance electrode materials for sodium-ion batteries remains a challenge due to volume changes in anode materials. Utilizing different redox potentials of metals and preparing composite materials can enhance battery performance, energy storage efficiency, and cycle stability.
In the current state of research, it is still a challenge to develop high-performance electrode materials with high energy density and long cycle life for sodium-ion batteries. For example, Owing to the serious volume changes of the anode active materials in the actual application of the sodium-ion batteries, which resulting in irreversible capacity loss and poor cycle stability of the battery. Taking advantage of different redox potentials of metals has proven to be an effective method to reduce volume changes. Here SbSn nanodots are encapsulated in nitrogen-doped carbon nanofibers prepared by electrospinning. The different oxidation depotentialities of Sn and Sb in SbSn helps to reduce the volume expansion during the cycle, three-dimensional interconnected N-doped carbon nanofibers(NCNFs) have a high specific surface area and high porosity, which are conducive to the transmission of electrons and ions. The resulting SbSn nanodots filled in N-doped carbon nanofibers(SbSn@NCNFs) composite exhibits impressive electrochemical performance, with high discharge capacity (808mAh g(-1) at 100mAg(-1)), rate capability(331mAh g(-1) at 1.6Ag(-1)) and excellent cycle stability (331mAh g(-1) at 100mAg(-1) after 500 cycles). By using this material as the anode and the Na3V2(PO4)(2)F-3 nano-flower anchored on three-dimensional carbon sheets (NVPF@3Dc) material manufactured by our research group as the cathode, a full Sodium-ion battery(SIB) with commercial value is assembled. (C) 2021 Elsevier Ltd. All rights reserved.
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