材料科学
纳米复合材料
电化学
插层(化学)
化学工程
无定形固体
电池(电)
碳纤维
无定形碳
阴极
涂层
无机化学
纳米技术
电极
复合数
复合材料
物理化学
有机化学
化学
功率(物理)
物理
量子力学
工程类
作者
Yongseok Lee,Jungmin Kang,Jinho Ahn,Wonseok Ko,Hyun-Young Park,Jung‐Keun Yoo,Won‐Sub Yoon,Jongsoon Kim
标识
DOI:10.1016/j.mtener.2023.101325
摘要
Conversion-type cathodes have a higher theoretical capacity compared to intercalation-type cathodes due to the use of more transition metal cations. However, their sluggish kinetics and low operation voltage hinder their practical application in the industry, resulting in low specific capacity. To address these issues, we prepare an amorphous carbon-coated Cu(PO3)2 nanocomposite, and evaluate its electrochemical performance under rechargeable Na-ion battery system. At a current density of 24 mA/g, it achieves a large specific capacity of ∼232 mAh/g with an average operation voltage of ∼2.0 V (vs. Na+/Na). Furthermore, the amorphous carbon-coated Cu(PO3)2 nanocomposite exhibits a cycle retention of ∼90% compared to the initial capacity after 100 cycles. In contrast, bare Cu(PO3)2 shows poor electrochemical performance under the same conditions. Various experimental measurements have demonstrated that the amorphous carbon-coated Cu(PO3)2 nanocomposite exhibits a reversible and smooth conversion reaction of Cu(PO3)2 phase in the rechargeable Na-ion battery system.
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