材料科学
电极
纳米复合材料
电化学
碳纤维
离子
快离子导体
扩散
化学工程
纳米技术
电解质
复合数
物理化学
复合材料
热力学
物理
工程类
量子力学
化学
作者
Zhixuan Wei,Xing Meng,Ye Yao,Qiang Liu,Chunzhong Wang,Yingjin Wei,Fei Du,Gang Chen
标识
DOI:10.1021/acsami.6b12650
摘要
Exploring suitable electrode materials with high specific capacity and high-rate capability is a challenging goal for the development of Na-ion batteries. Here, we report a NASICON-structured compound, Ca0.5Ti2(PO4)3, with respect to its synthesis and electrochemical properties. The electrode is found to enable fast Na+ ion diffusion owing to the rich crystallographic vacancies, affording a reversible capacity of 264 mA h g–1 between 3.0 and 0.01 V. In particular, the hybrid Ca0.5Ti2(PO4)3@carbon exhibits remarkable rate performance with a discharge capacity of nearly 45 mA h g–1 at a current density of 20 A g–1, which is attributed to the pseudocapacitive effect.
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