| 第 49 卷第 2 期 |  | Vol. 49 No. 2 | | 2019 年 4 月 | Apr 2019 |
|
所屬欄目：功能材料
Co3O4電極材料的制備及其電容性能研究 |
| 鄒爾麗，楊佳欣，李欣茹，李艷華*
（長(cháng)沙學(xué)院 生物與環(huán)境工程學(xué)院，湖南 長(cháng)沙 410022） |
| 摘 要：采用水熱法，通過(guò)控制反應時(shí)間制備出不同形貌和尺寸的Co3O4材料。利用XRD和SEM對其結構和形貌進(jìn)行表征，采用循環(huán)伏安、恒電流充放電和交流阻抗等方法測試了其電化學(xué)性能。結果表明，隨著(zhù)反應時(shí)間的延長(cháng)，Co3O4材料的晶粒尺寸增大，形貌由不規則顆粒狀變?yōu)檎⒎襟w，其比電容不斷降低。在電流密度為0.2 A·g-1時(shí)，反應5 h、10 h和15 h所制備的Co3O4材料的比電容值分別為153.3 F·g-1、99.3 F·g-1和51.1 F·g-1。當電流密度從0.2 A·g-1增大到1.8 A·g-1時(shí)，反應5 h、10 h和15 h所制備的Co3O4材料的比電容值分別為96.3 F·g-1、91.3 F·g-1和27.1 F·g-1，其比電容保持率分別為62.8%、91.9%和53.0%。水熱反應5 h所制備的Co3O4材料具有最好的比電容。 |
| 關(guān)鍵詞：超級電容器；Co3O4；水熱法 |
| 中圖分類(lèi)號：O614.81 文獻標識碼：A 文章編號：1009-9212（2019）02-0053-05 |
|
| Synthesis of Co3O4 Material and Its Capacitive Performance |
| ZOU Er-li, YANG Jia-xin, LI Xin-ru, LI Yan-hua*
(College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China) |
| Abstract：Co3O4 Materials with different morphologies and sizes were prepared by hydrothermal method through controlling the reaction time. The as-synthesized Co3O4 was characterized by X-ray diffraction and scanning electron microscopy. Electrochemical property of Co3O4 was carried out by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The results showed that the crystallite size of Co3O4 materials increased with the increase of reaction time and their morphology changed from irregular particle to cube. The specific capacitance of Co3O4 materials decreased continuously when reaction time increased. When the current density was 0.2 A·g-1, the specific capacitance values of Co3O4 material synthesized with 5 h, Co3O4 material synthesized with 10 h, and Co3O4 material synthesized with 15 h were 153.3, 99.3 and 51.1 F·g-1, respectively. When the current density increased from 0.2 A·g-1 to 1.8 A·g-1, the specific capacitance values of Co3O4 material synthesized with 5 h, Co3O4 material synthesized with 10 h, and Co3O4 material synthesized with 15 h were 96.3 F·g-1, 91.3 F·g-1 and 27.1 F·g-1, respectively. Their specific capacitance retention rates were 62.8%, 91.9% and 53.0%, respectively. Co3O4 material prepared by hydrothermal reaction for 5 h showed the highest specific capacitance. |
| Key words：supercapacitors; Co3O4; hydrothermal method |
|
基金項目：2017年度湖南省大學(xué)生研究性學(xué)習和創(chuàng )新性實(shí)驗計劃項目，2018年度長(cháng)沙學(xué)院“大學(xué)生創(chuàng )新項目計劃”。
|
作者簡(jiǎn)介：鄒爾麗（1999-），女，湖南婁底人，研究方向：超級電容器電極材料研究。
|
聯(lián) 系 人：李艷華，副教授，博士，研究方向：超級電容器電極材料研究（E-mail：liyanhua11@126.com）。
|
收稿日期：2018-04-05
|
|