Facile synthesis of hierarchical nanocage MnCo2O4 for high performance supercapacitor
Facile synthesis of hierarchical nanocage MnCo2O4 for high performance supercapacitor
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DOI：
10.1016/j.electacta.2016.12.109
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发表时间：
2017-01-20
影响因子：
6.6
通讯作者：
Yuan, Huatang
中科院分区：
文献类型：
--
作者：
Dong, Yanying;Wang, Ying;Yuan, Huatang
本文以双金属咪唑分子筛（ZIF，Mn-Co-ZIF）为前驱体和模板剂合成了纳米笼状MnCo 2 O 4，该材料在高性能超级电容器方面具有巨大的潜力。所得MnCo 2 O 4具有中空多面体纳米结构，继承了Mn-Co-ZIF的双重结构。此外，纳米笼MnCo 2 O 4由大量纳米颗粒组成，有助于缩短离子扩散路径，提供多孔结构，并协同电子传输。MnCo 2 O 4电极表现出优异的超级电容器性能，其具有1763 F g（1）（1 A g（1））的高比电容和840 F g（1）（10 A g（1））的可逆电容。在1 A g（1）下4500次循环后，MnCo 2 O 4电极显示出95%的电容保持率，这证明了其上级循环稳定性。纳米笼MnCo 2 O 4具有良好的电化学性能，这是由于其独特的分层中空结构在电化学循环过程中可以保持。(C)2016爱思唯尔有限公司版权所有。
Herein, nanocage MnCo2O4 is synthesized by using a dual metal zeolitic imidazolate framework (ZIF, Mn-Co-ZIF) as both precursor and template, which shows great potential for high performance supercapacitor. The as-obtained MnCo2O4 exhibits hollow polyhedral nanostructure, that inherit from the dual Mn-Co-ZIF. Moreover, the nanocage MnCo2O4 is composed by numerous nanoparticles, which help to short ion diffusion pathway, provide porous structure, and collaborative electronic transmission. The MnCo2O4 electrodes exhibit excellent supercapacitor performances, that possess a high specific capacitance of 1763 F g(1) (1 A g(1)), and a reversible capacitance of 840 F g(1) (10 A g(1)). After 4500 cycles at 1 A g (1), the MnCo2O4 electrode shows a capacitance retention of 95%, which demonstrates its superior cycle stability. The nanocage MnCo2O4 exhibits good electrochemical properties, due to its unique hierarchical hollow structure can be maintained during the electrochemical cycling. (C) 2016 Elsevier Ltd. All rights reserved.