空心海胆状二氧化锰的制备及其在超级电容器中的应用 |
Synthesis of Hollow Urchin-Like MnO2 via a Facile Hydrothermal Method and Its Application in Supercapacitors |
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摘要: 采用简单的一步水热法制备了空心海胆状二氧化锰,无需任何模板剂和表面活性剂。该材料具有3D的纳米结构,结构稳定,并由单个的二氧化锰空心管自组装而成。该纳米材料的特殊结构为其提供了高的比电容。在1 mol·L-1硫酸钠电解液中,扫速为1 mV·s-1的条件下,该材料的比电容值为254.6 F·g-1。在电流密度为1.0 A·g-1的条件下,充放电循环1 000次后比电容值仍保持为初始值的97.5%。表明该材料具有良好的电容性能和稳定性,其具备用作高性能超级电容器的电极材料的潜能。 |
关键词: 空心海胆结构 二氧化锰 超级电容器 |
基金项目: 国家自然科学基金(No.20905038),教育部创新团队(IRT1148),江苏省自然科学基金(BK20141424)和江苏高校优势学科建设工程资助项目(PAPD)资助项目。 |
Abstract: In this study, we described a simple hydrothermal method to synthesize hollow urchin-like manganese dioxide without any template and surfactant. 3D Hollow urchin-like manganese dioxide was consisted of single manganese dioxide tube with stable structure. Its unique structure is beneficial to improve the specific capacitance. The specific capacity is 254.6 F·g-1 in 1 mol·L-1 Na2SO4 electrolyte at a scan rate of 1 mV·s-1. Over 97.5% of the first cycle capacitance was retained after repeating the galvanostatic charge-discharge for 1 000 cycles. This nanomaterial could be used to supercapacitor which exhibited excellent stability and capacitive properties, indicating its potential application to act as a promising electrode material for supercapacitors. |
Keywords: hollow urchin structure MnO2 supercapacitors |
投稿时间:2014-02-28 修订日期:2014-09-02 |
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冯晓苗,闫真真,陈宁娜.空心海胆状二氧化锰的制备及其在超级电容器中的应用[J].无机化学学报,2014,30(11):2509-2515. |
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