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黄瓜状 V2O5/聚(3,4-乙撑二氧噻吩)&MnO2 纳米线具有增强的电化学循环稳定性。

Cucumber-like V2O5/poly(3,4-ethylenedioxythiophene)&MnO2 nanowires with enhanced electrochemical cyclability.

机构信息

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology, Wuhan 430070, China.

出版信息

Nano Lett. 2013 Feb 13;13(2):740-5. doi: 10.1021/nl304434v. Epub 2013 Jan 30.

Abstract

Inspired by the cucumber-like structure, by combining the in situ chemical oxidative polymerization with facile soaking process, we designed the heterostructured nanomaterial with PEDOT as the shell and MnO(2) nanoparticles as the protuberance and synthesized the novel cucumber-like MnO(2) nanoparticles enriched vanadium pentoxide/poly(3,4-ethylenedioxythiophene) (PEDOT) coaxial nanowires. This heterostructured nanomaterial exhibits enhanced electrochemical cycling performance with the decreases of capacity fading during 200 cycles from 0.557 to 0.173% over V(2)O(5) nanowires at the current density of 100 mA/g. This method is proven to be an effective technique for improving the electrochemical cycling performance and stability of nanowire electrodes especially at low rate for application in rechargeable lithium batteries.

摘要

受黄瓜状结构的启发,通过结合原位化学氧化聚合与简便的浸泡工艺,我们设计了一种具有 PEDOT 壳和 MnO2 纳米颗粒突起的异质结构纳米材料,并合成了新型的黄瓜状 MnO2 纳米颗粒富钒氧化物/聚(3,4-乙撑二氧噻吩)(PEDOT)共轴纳米线。这种异质结构纳米材料在电流密度为 100mA/g 时,经过 200 次循环后,容量衰减从 0.557%降至 0.173%,表现出增强的电化学循环性能。该方法被证明是一种有效提高纳米线电极电化学循环性能和稳定性的技术,特别是在低倍率下应用于可充电锂电池。

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