阳极
电化学
锂(药物)
八面体
材料科学
离子
无机化学
化学工程
化学
电极
物理化学
有机化学
医学
工程类
内分泌学
作者
Youngho Jin,Ha Ryong Hwang,Honggyu Seong,Joon Ha Moon,Geongil Kim,Han‐Ill Yoo,Tymoteusz Jung,Jin Bae Lee,Jaewon Choi
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2024-03-22
卷期号:7 (7): 2955-2962
标识
DOI:10.1021/acsaem.4c00237
摘要
Antimony-based materials for lithium-ion storage are gaining attention as anode materials due to their high theoretical capacity. However, their volume expansion during the charge–discharge process causes a rapid capacity drop and low-cycle stability. To deal with these problems, we synthesized uniform octahedral antimony trioxide (Sb2O3) through the colloidal method and combined Sb2O3 with reduced graphene oxide (rGO). Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) showed the synthesis of octahedra Sb2O3 anchoring on the surface of rGO (Sb2O3-rGO) well. The galvanostatic charge/discharge (CD) test and cyclic voltammetry (CV) were used to estimate the electrochemical reaction of Sb2O3-rGO. To assess its kinetics, an analysis of CV curves at different scan rates and the galvanostatic intermittent titration technique were conducted. The Sb2O3-rGO exhibited high discharge capacity (744.0 mAh g–1 at 0.1 A g–1 after 310th cycle) and cycle stability (386.9 mAh g–1 at 0.5 A g–1 after 1200th cycle).
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