MnCO<sub>3</sub>/CB复合材料应用于超级电容器性能研究

摘要

为了提高新型储能材料碳酸锰（MnCO₃）的导电性和应用于超级电容器的性能，我们采用简单温和的液相沉积法，在室温下制备出MnCO₃/CB复合材料。导电炭黑（CB）先用稀HNO₃进行纯化和活化的处理，再将处理后的CB放入NH₄HCO₃和MnSO₄的混合溶液中进行液相沉淀。利用红外和XPS方法观察发现经过稀酸纯化处理后，炭黑表面的负电基团（羧基和醌基）增多，使得其在水中不易团聚，更有利于合成均匀的复合物。利用SEM对复合物形貌进行了表征，直径40 nm的炭黑颗粒将莲花状的碳酸锰颗粒包裹，并在碳酸锰颗粒之间堆积形成含有孔隙的空间结构。利用恒流充放电测试其电化学性能，结果表明，MnCO₃/CB复合电极材料的质量比容值是纯粹MnCO₃电极材料的2倍并且具有良好循环容量保持率。MnCO₃作为一种新近发现的储能材料，合成复合物为其作为超级电容器电极材料提供了新的思路。

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	韩丽琼
	刘坤琳
	陈明鸣

关键词：超级电容器复合物碳酸锰炭黑电化学性能

Abstract：

In order to improve the characterization of MnCO₃, a three-dimensional composite of MnCO₃ and carbon black (CB) is built via a quite simple co-precipitation method at room temperature. Firstly we use concentrate HNO₃ to purify and activate the CB, then we put the CB into the mixture of NH₄HCO₃ and MnSO₄ for co-precipitation. We find many negative groups (carboxyl and quinone) on the purified CBs' surface by FT-IR and XPS, which make CB difficult to reunite in the water. MnCO₃ like lotus is mixed with flocculated carbon black with diameter 700 nm which is identified by SEM. The result of XRD shows that the fiber like product is MnCO₃. The cyclic voltammetry of the MnCO₃/CB nanocomposite shows better electrochemical performance than pure MnCO₃. As a new capacitor energy storage material, MnCO₃/CB composite provide a new direction for supercapacitor electrode material.

Keywords： supercapacitor； composite； MnCO₃； carbon black； electrochemical characterization

Received 2016-04-14;

Fund:

国家自然科学基金（NSFC 51372168）。

Corresponding Authors: 陈明鸣,E-mail:chmm@tju.edu.cn。 Email: chmm@tju.edu.cn

About author: 韩丽琼(1990-),女,硕士研究生,现从事超级电容器电极材料方面的研究。

引用本文:

韩丽琼, 刘坤琳, 陈明鸣.MnCO₃/CB复合材料应用于超级电容器性能研究[J]. 化学工业与工程, 2018,35(2): 1-8

Han Liqiong, Liu Kunlin, Chen Mingming.MnCO₃/CB Composite and Its Application for Electrochemical Capacitor[J]. Chemcial Industry and Engineering, 2018,35(2): 1-8

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