介孔碳基钴镍氧化物的电化学电容性能

杨贞胜; 孔令斌; 邓莉; 罗永春; 康龙

doi:10.61558/2993-074X.2834

电化学 >

2011 , Vol. 17 >Issue 2: 217 - 221

DOI: https://doi.org/10.61558/2993-074X.2834

研究论文

介孔碳基钴镍氧化物的电化学电容性能

杨贞胜 ,
孔令斌 ,
邓莉 ,
罗永春 ,
康龙

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1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050;
2. 兰州理工大学材料科学与工程学院,甘肃兰州 730050

收稿日期: 2011-01-07

修回日期: 2011-03-15

网络出版日期: 2011-05-05

基金资助

国家自然科学基金(50602020), 973计划前期研究专项(2007CB216408)和甘肃省高校基本科研业务费专项资金

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Electrochemical Capacitive Performance of Mesoporous Carbon Based Co-Ni Oxides

YANG Zhen-Sheng ,
KONG Ling-Bin ,
DENG Li ,
LUO Yong-Chun ,
KANG Long

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1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Received date: 2011-01-07

Revised date: 2011-03-15

Online published: 2011-05-05

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摘要

以介孔碳CMK-3为载体,利用CMK-3表面缺陷作形核中心,应用前驱体化学液相共沉淀法制备新型的Co0.25Ni0.75氧化物/CMK-3复合材料.X射线衍射（XRD）分析及扫描电子显微镜（SEM）形貌观察表明该材料主要呈现弱结晶态结构, 其中Co-Ni氧化物纳米片交错成空间网络并包覆在介孔碳表面.BET测试表明该材料孔径分布在3~4 nm之间,且高分散、疏松多孔,具有良好的OH-离子传递特性.循环伏安和恒流充放电测试表明,该材料有高的电化学活性, 在5 mA/cm2电流密度下,Co0.25Ni0.75氧化物（92%）/C比电容达1781F/g.

关键词： 超级电容器; 钴镍氧化物; 交错纳米片网络

本文引用格式

杨贞胜 , 孔令斌 , 邓莉 , 罗永春 , 康龙 . 介孔碳基钴镍氧化物的电化学电容性能[J]. 电化学, 2011 , 17(2) : 217 -221 . DOI: 10.61558/2993-074X.2834

Abstract

By using defects on the surface of CMK-3 served as nucleation center, Co0.25Ni0.75 oxide/C composite was successfully prepared through a simple chemical co-precipitation method. Characterization was carried by using X-ray diffraction, BET and scanning electron microscopy. Results showed that a perfect mesoporous network of interconnected nanoflakes was obtained for Co0.25Ni0.75 oxide/C composite and, this material has a less crystallization, interconnected nanoflakes network structure and a narrow mesoporous distribution at about 3~4 nm. The highly dispersed and loosely packed Co0.25Ni0.75 oxide/C composite possessed good electrochemical accessibility and fast diffusion rate of OH-. Cyclic voltammetry, charge–discharge curves suggested that the as-prepared Co0.25Ni0.75 oxide(92%) /C electrode is highly electrochemical activated and an admirable specific capacitance of as high as 1781 F/g could be obtained at current density of 5mA/cm2.

Key words： supercapacitor; ; cobalt-nickel oxide; ; interconnected nanoflakes network

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