普鲁士蓝
阴极
循环伏安法
假电容
锂(药物)
材料科学
电解质
电化学
化学工程
分析化学(期刊)
电极
化学
色谱法
超级电容器
物理化学
医学
工程类
内分泌学
作者
Yuncai Chen,Hyung‐June Woo,Sharifah Athira Fatihah Syed Mohd Fadzil,Tan Winie,Fei Wang,A. K. Arof
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-03-22
卷期号:5 (4): 4833-4840
被引量:16
标识
DOI:10.1021/acsanm.1c04416
摘要
Fast charge–discharge rate sodium-ion batteries (SIBs) can be considered as an ideal alternative candidate to lithium-ion batteries (LIBs) for low-cost and large-scale application. Prussian blue and its analogues (abbreviated as PB) as a cathode material for SIBs were proposed due to the similar working mechanisms with LIBs. However, the early synthesized PBs have suffered capacity fading at long cycles of charge/discharge and high C-rate. In this work, we synthesized a cage-like porous cubic structure (PB-C) via a simple single iron source precipitation method with a reheating process and acid etching. The galvanostatic charge–discharge measurements have shown that a high specific capacity could be maintained at a high C-rate. At 0.2 C, the specific capacity is 112 mA h g–1, while at 10 C, the specific capacity is 97 mA h g–1. Also, PB-C showed no obvious capacity fading at the 1000th cycle with more than 85% capacity retention. Cyclic voltammetry analysis at various scan rates proved that the nanoporous structure with a superior specific surface area carries the pseudocapacitance effect, leading to the excellent electrochemical performance. This exceptional performance discloses that the as-prepared cage-like porous PB is one of the potential candidates as a cathode material in low-cost and large-scale applications for practical SIBs.
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