阳极
电化学
材料科学
氮化物
接口(物质)
氮化钛
钛
钠离子电池
电池(电)
钠
离子
无机化学
化学工程
纳米技术
作者
Ming Liu,Zilu Zhang,Yunyun Xie,Zhiwei Guo,Hua Feng,Wenyou Liu,Hai Wang
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:51 (34): 12855-12865
被引量:3
摘要
The search for new electrode materials for sodium-ion batteries (SIBs), especially for enhancing the specific capacity and cycling stability of anodes, is of great significance for the development of new energy conversion and storage materials. Here, a new type of titanium nitride composite anode (TiN@C) coated with 2D carbon nanosheets was prepared for the first time using a rationally designed topochemical conversion approach of interface-confinement. Subsequently, the electrochemical performance and Na+ storage mechanism of TiN@C as an anode for SIBs was investigated. The quantum-dot-sized TiN anodes exhibited shorter ionic transport pathways, while the 2D ultrathin carbon nanosheets reinforced the structural stability of the composite and provided a high electron transformation rate. As a result, the TiN/C composite anode can deliver a high reversible capacity of 170 mA h g-1 and 149 mA h g-1 after 5000 cycles at a current density of 0.5 A g-1 and 1 A g-1, indicating excellent electrochemical properties. This work provides new opportunities to explore the convenient and controllable preparation of metal nitride anodes for other energy conversion and storage applications.
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