第34卷第5期无机材料学报Vol. 34No. 5 2019年5月Journal of Inorganic Materials May, 2019文章编号: 1000-324X(2019)05-0487-06 DOI: 10.15541/jim20180343
Co3O4纳米线阵列@活性炭纤维复合材料的
水热合成及电化学应用
刘伟1,2,3, 郑凯2, 王东红1,2, 雷忆三1,2, 范怀林3
(1. 电磁防护材料及技术山西省重点实验室, 太原030032; 2. 中国电子科技集团公司第 33 研究所, 太原030032;
3. 中国科学院山西煤炭化学研究所, 煤转化国家重点实验室, 太原030001)
摘要: 以Co(NO3)2·6H2O为钴源, NH4F和尿素作为添加剂, 通过水热法在粘胶基活性炭纤维(ACF)的表面生长了Co3O4纳米线, 制备了Co3O4@ACF复合材料并进行了结构形貌表征及电化学性能测试。结果表明: 针状的Co3O4纳米线阵列均匀地垂直生长在活性炭纤维表面, 形成了丰富的介孔结构。通过改变Co(NO3)2·6H2O的用量, 可以获得不同负载量的Co3O4@ACF复合材料。当Co3O4负载量为47wt%时, Co3O4@ACF复合材料在1 A/g电流密度下的比电容高达566.9 F/g, 几乎是纯Co3O4的2倍; 在15 A/g的电流密度下, 其比电容仍可达到393.3 F/g, 表现了较好的倍率特性; 经过5000次循环充放电后, 其比电容仍可保持84.2%, 展现了优良的循环稳定性。
关键词: 活性炭纤维; 水热法; 四氧化三钴; 超级电容器
中图分类号: TB34文献标识码: A
Co3O4 Nanowire Arrays@Activated Carbon Fiber Composite Materials: Facile Hydrothermal Synthesis and Its Electrochemical Application
LIU Wei1,2,3, ZHENG Kai2, WANG Dong-Hong1,2, LEI Yi-San1,2, FAN Huai-Lin3
(1. Shanxi Key Laboratory of Electromagnetic Protection Material and Technology, Taiyuan 030032, China; 2. The 33rd Insti-
tute of China Electronics Technology Group Corporation, Taiyuan 030032, China; 3. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China)
Abstract: Co3O4@activated carbon fibers (ACF) composites were prepared through a facile hydrothermal method followed by calcination process, involving the growth of Co3O4 nanowires on ACF surface. Co(NO3)2·6H2O was used as Co source, urea and NH4F as additives. The structures and morphologies of Co3O4@ACF composites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), N2 adsorption/desorption measures, and thermogravimetric analysis (TGA). The electrochemical properties of Co3O4@ACF composites were investi-gated by cyclic voltammetry (CV), galvanostatic charge discharge (GCD) and electrochemical impedance spec-troscopy (EIS). The results showed that Co3O4 nanowire arrays uniformly grew on the surface of ACF along the vertical direction, forming abundant mesoporous structures. Co3O4@ACF composites with various Co3O4 fractions could be obtained by adding different amount of Co(NO3)2·6H2O. Furthermore, Co3O4@ACF composite with 47wt% Co3O4 fraction exhibited a high specific capacitance of 566.9 F/g at a current density of 1 A/g, which was almost twice as high as that of pure Co3O4. Even at 15 A/g, the composite still delivered a specific capacitance of
收稿日期: 2018-07-26; 收到修改稿日期:2018-10-30
基金项目:国家自然科学基金(U1710115); 山西省自然科学基金(201701D121050); 中国电科联合基金(6401B08110304) National Natural Science Foundation of China (U1710115); Natural Science Foundation of Shanxi Province
(201701D121050); Joint Foundation of China Electronic Technology Group Corporation (6401B08110304) 作者简介:刘伟(1990–), 男, 工程师. E-mail: lwucas2014@https://www.doczj.com/doc/de19019819.html,
通讯作者:雷忆三, 研究员. E-mail: lyscetc@https://www.doczj.com/doc/de19019819.html,