阳极
材料科学
法拉第效率
电池(电)
电化学
无定形固体
相(物质)
离子
化学工程
电极
Crystal(编程语言)
萃取(化学)
纳米技术
结晶学
物理化学
化学
热力学
功率(物理)
计算机科学
工程类
物理
有机化学
程序设计语言
色谱法
作者
Ah-Ram Park,Cheol‐Min Park
出处
期刊:ACS Nano
[American Chemical Society]
日期:2017-05-09
卷期号:11 (6): 6074-6084
被引量:91
标识
DOI:10.1021/acsnano.7b02039
摘要
A cubic crystal-structured Sn-based compound, SnTe, was easily synthesized using a solid-state synthetic process to produce a better rechargeable battery, and its possible application as a Sn-based high-capacity anode material for Li-ion batteries (LIBs) and Na-ion batteries (NIBs) was investigated. The electrochemically driven phase change mechanisms of the SnTe electrodes during Li and Na insertion/extraction were thoroughly examined utilizing various ex situ analytical techniques. During Li insertion, SnTe was converted to Li4.25Sn and Li2Te; meanwhile, during Na insertion, SnTe experienced a sequential topotactic transition to NaxSnTe (x ≤ 1.5) and conversion to Na3.75Sn and Na2Te, which recombined into the original SnTe phase after full Li and Na extraction. The distinctive phase change mechanisms provided remarkable electrochemical Li- and Na-ion storage performances, such as large reversible capacities with high Coulombic efficiencies and stable cyclabilities with fast C-rate characteristics, by preparing amorphous-C-decorated nanostructured SnTe-based composites. Therefore, SnTe, with its interesting phase change mechanisms, will be a promising alternative for the oncoming generation of anode materials for LIBs and NIBs.
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