纳米棒
材料科学
阳极
电极
电流密度
电化学
扩散
离子
电导率
分析化学(期刊)
电阻率和电导率
化学工程
纳米技术
物理化学
热力学
物理
工程类
电气工程
化学
量子力学
色谱法
作者
He Li,Junmei Jiang,Jianxing Huang,Yunhui Wang,Yueying Peng,Yiyong Zhou,Bing‐Joe Hwang,Jinbao Zhao
标识
DOI:10.1021/acsami.8b00783
摘要
In this study, one-dimensional Cu2- xSe nanorods synthesized by a simple water evaporation-induced self-assembly approach are served as the anode material for Na-ion batteries for the first time. Cu2- xSe electrodes express outstanding electrochemical properties. The initial discharge capacity is 149.3 mA h g-1 at a current density of 100 mA g-1, and the discharge capacity can remain at 106.2 mA h g-1 after 400 cycles. Even at a high current density of 2000 mA g-1, the discharge capacity of the Cu2- xSe electrode still remains at 62.8 mA h g-1, showing excellent rate performance. Owing to the excellent electronic conductivity and one-dimensional structure of Cu2- xSe, the Cu2- xSe electrodes manifest fast Na+ ion diffusion rate. Moreover, detailed Na+ insertion/extraction mechanism is further investigated by ex situ measurements and theoretical calculations.
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