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Owing to the abundant reserves and low cost, sodium-ion batteries (SIBs) have garnered unprecedented attention. However, their widespread adoption is hindered by the scarcity of alternative anodes with fast-charging capability and high stability. To overcome this challenge, a fast-charging SIB anode, N-doped Bi/BiOCl embedded in a carbon framework (Bi/BiOCl@NC) with a fast Na+ transport channel and ultra-high structural stability, is developed. During cycling in ether electrolyte, Bi/BiOCl@NC undergoes a remarkable transformation into a 3D porous skeleton, which significantly reduces the Na+ transport pathway and accommodates volume changes. By employing density functional theory calculations to simulate the storage behavior of Na+ in the structure, Bi/BiOCl@NC is theoretically characterized to have a low Na+ transport barrier (0.056 eV) and outstanding electronic conductivity. Such unique characteristics induce Bi/BiOCl@NC anode to have an ultra-high Na+ storage capacity of 410 mAhg-1 at 20 Ag-1 and exhibit outstanding cycling stability with over 2300 cycles at 10 Ag-1. This study provides a rational scenario for the fast-charging anode design and will enlighten more advanced research to promote the exploitation of SIBs. A fast-charging SIB anode, N-doped Bi/BiOCl embedded in a carbon framework, with a fast Na+ transport channel, is developed. Density functional theory calculations confirm that the anode is theoretically characterized to have a low Na+ transport barrier (0.056 eV) and outstanding electronic conductivity. image
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ADVANCED ENERGY MATERIALS
ISSN: 1614-6832
Year: 2024
Issue: 37
Volume: 14
2 4 . 4 0 0
JCR@2023
Cited Count:
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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