CN105914049A - 一种MnO2/碳纤维管复合电极材料的制备方法 - Google Patents
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 42
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- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 10
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- 239000000463 material Substances 0.000 abstract description 11
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002484 cyclic voltammetry Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000007832 Na2SO4 Substances 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
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- 239000006229 carbon black Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
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- 238000005119 centrifugation Methods 0.000 description 1
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- 239000008151 electrolyte solution Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- PQIOSYKVBBWRRI-UHFFFAOYSA-N methylphosphonyl difluoride Chemical group CP(F)(F)=O PQIOSYKVBBWRRI-UHFFFAOYSA-N 0.000 description 1
- 238000007144 microwave assisted synthesis reaction Methods 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
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- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
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- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
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Abstract
本发明属于超级电容器电极材料制备技术领域,涉及一种MnO2/碳纤维管复合电极材料的制备方法,以KMnO4和碳纤维管为反应原料,去离子水为溶剂,利用微波辐射合成技术制备MnO2/碳纤维管复合电极材料,合成时间很短,步骤简单,产率高,适合批量制备MnO2/碳复合电极材料;制备的MnO2/碳纤维管复合电极材料中MnO2为纳米棒状结构,均匀附着于碳纤维管表面,具有高度分散性,在电解液中提供较大接触面积,利于发挥赝电容效应;碳纤维管增强材料的导电性,提升反应过程中的电子传导效率,从而提高材料的电容特性。
Description
技术领域:
本发明属于超级电容器电极材料制备技术领域,涉及一种MnO2/碳纤维管复合电极材料的制备方法,具体涉及一种狼牙棒状的MnO2/碳纤维管超级电容器复合电极材料的制备方法。
背景技术:
超级电容器作为一种储能器件,具有结构简单、功率密度高、充放电快速、循环寿命长、工作温度范围宽等特点,在电动汽车、航空航天飞行器、军事等诸多领域有广阔的应用前景,引起了国内外研究者的广泛关注,成为当前化学电源领域的研究热点之一。
超级电容器储能机理可分为三类:基于吸附的双电层电容、涉及氧化还原反应的赝电容、以双电层和赝电容为储能机制的混合电容器。电极材料是超级电容器的关键,它直接决定了超级电容器的诸多性能指标。近年来,金属氧化物赝电容材料吸引了众多研究者的注意力,这是因为金属氧化物制备简单、结构丰富、比表面大、金属离子价态丰富,非常适合用作电容器的电极材料,其中,MnO2纳米电极材料的研究最为广泛,但是MnO2导电性不佳,这会直接影响电容器的性能,为提高导电性,研究者将MnO2与各种碳材料进行复合,从而提高电容器性能,例如,文献“J.Mater.Chem.,2012,22,153-160”报道了在石墨化的碳空心球表面生长一层MnO2,表现出较高的比电容;文献“J.Mater.Chem.,2012,22,16939”则报道了将MnO2与聚苯胺复合后,在0.5A g-1的电流密度下比电容高达383F g-1;Lu等人(Nanoscale Research Letters 2012,7:33)也报道了在碳纳米管上负载MnO2后可以显著提高电容器性能;此外,Wang等人(ACS Nano 2010,4,2822–2830)报道了MnO2与石墨烯复合,也表现出较好的性能。然而,从上述公开的文献中可以发现其制备过程需要时间较长,严重降低了材料的合成效率,因而,发展一种快速、高效的超级电容器电极材料制备方法具有重要研究意义。
发明内容:
本发明的目的在于克服现有技术存在的缺点,寻求设计提供一种利用微波合成技术高效、快速制备MnO2/碳纤维管复合电极材料的方法,该方法合成时间很短,步骤简单,产率高,适合批量制备MnO2/碳纤维复合电极材料,制备的MnO2/碳纤维管复合电极材料作为超级电容器电极材料表现出较高的比电容。
为了实现上述发明目的,本发明以KMnO4和碳纤维管为反应原料,去离子水为溶剂,利用微波辐射合成技术制备MnO2/碳纤维管复合电极材料,具体包括以下步骤:
(1)将20-50mg碳纤维管、17-51mg KMnO4依次加入到20ml去离子水中,超声分散10min后转移至反应瓶中;
(2)将步骤(1)的反应瓶放入微波合成仪器,温度设置为160-185℃,反应时间为5-20min;
(3)反应结束后,将步骤(2)得到的样品在6000rpm条件下离心收集,依次用去离子水、乙醇分别洗涤2次,再在60℃干燥12h,制备得到MnO2/碳纤维管复合电极材料。
本发明与现有技术相比,合成时间很短,步骤简单,产率高,适合批量制备MnO2/碳复合电极材料;制备的MnO2/碳纤维管复合电极材料中MnO2为纳米棒状结构,均匀附着于碳纤维管表面,具有高度分散性,在电解液中提供较大接触面积,利于发挥赝电容效应;碳纤维管增强材料的导电性,提升反应过程中的电子传导效率,从而提高材料的电容特性。
附图说明:
图1为本发明实施例1制备的MnO2/碳纤维管复合电极材料的透射电镜照片。
图2为本发明实施例2制备的MnO2/碳纤维管复合电极材料的透射电镜照片。
图3为本发明实施例3制备的MnO2/碳纤维管复合电极材料的透射电镜照片。
图4为本发明实施例2制备的MnO2/碳纤维管复合电极材料在50mV/s扫速下得到的循环伏安曲线。
具体实施方式:
下面通过具体实施例并结合附图做进一步说明。
实施例1:
本实施例将33mg碳纤维管、17mg KMnO4先后加入到20ml去离子水中,超声分散10min后转移至反应瓶中,再将反应瓶放入微波合成仪器,温度设置为185℃,反应时间为10min;反应结束后,将得到的样品进行离心(6000rpm)收集后,依次用去离子水和乙醇分别洗涤2次,在60℃干燥12h,制备得到的MnO2/碳纤维管复合电极材料。
本实施例对制备的MnO2/碳纤维管复合电极材料进行TEM表征,如图1所示,MnO2为纳米棒状结构,直径为6-8nm,长度为20-70nm,均匀附着于碳纤维管表面。
实施例2:
本实施例将33mg碳纤维管、34mg KMnO4先后加入到20ml去离子水中,超声分散10min后转移至反应瓶中,再将反应瓶放入微波合成仪器,温度设置为185℃,反应时间为10min;反应结束后,将得到的样品进行离心(6000rpm)收集后,依次用去离子水和乙醇分别洗涤2次,在60℃干燥12h,即制备得到MnO2/碳纤维管复合电极材料。
本实施例对制备的MnO2/碳纤维管复合电极材料进行TEM表征,如图1所示,MnO2为纳米棒状结构,直径为6-8nm,长度为20-70nm,密集附着于碳纤维管表面,与实施例1中得到的样品相比,MnO2含量显著增大。
本实施例将制备的MnO2/碳纤维管复合电极材料与聚偏二氟乙烯(polyvinylidenefluoride,PVDF)和碳黑按照85:10:5的重量百分比混合后加入0.5mL N-甲基吡咯烷酮(NMP),制作成浆料后涂敷于不锈钢网上,在60℃干燥12h后经压片机压片,即得超级电容器工作电极,采用三电极体系测试超级电容器工作电极的超电容性能,其中采用的电解液为1mol L-1Na2SO4水溶液,Pt片为对电极,Ag/AgCl为参比电极,其在50mV/s扫速下得到的循环伏安曲线如图4所示,经计算比电容为49.7F/g。
实施例3:
本实施例将33mg碳纤维管、51mg KMnO4先后加入到20ml去离子水中,超声分散10min后转移至反应瓶中,再将反应瓶放入微波合成仪器,温度设置为185℃,反应时间为10min;反应结束后,将得到的样品经离心(6000rpm)收集后,依次用去离子水和乙醇分别洗涤2次,在60℃干燥12h,即制备得到MnO2/碳纤维管复合电极材料。
本实施例对制备的MnO2/碳纤维管复合电极材料进行TEM表征,如图3所示,MnO2为纳米棒状结构,直径为6-10nm,长度为50-150nm,密集附着于碳纤维管表面,与实施例2中得到的样品相比,MnO2含量进一步增大,生长更为密集。
Claims (1)
1.一种MnO2/碳纤维管复合电极材料的制备方法,其特征在于以KMnO4和碳纤维管为反应原料,去离子水为溶剂,利用微波辐射合成技术制备MnO2/碳纤维管复合电极材料,具体包括以下步骤:
(1)将20-50mg碳纤维管、17-51mg KMnO4依次加入到20ml去离子水中,超声分散10min后转移至反应瓶中;
(2)将步骤(1)的反应瓶放入微波合成仪器,温度设置为160-185℃,反应时间为5-20min;
(3)反应结束后,将步骤(2)得到的样品在6000rpm条件下离心收集,依次用去离子水、乙醇分别洗涤2次,再在60℃干燥12h,制备得到MnO2/碳纤维管复合电极材料。
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CN107761195A (zh) * | 2017-10-26 | 2018-03-06 | 青岛大学 | 一种用于超级电容器电极的木质素基纳米碳纤维制备方法 |
CN107946085A (zh) * | 2017-11-22 | 2018-04-20 | 湖南科技大学 | 一种表面修饰的氮掺杂碳空心球负载的二氧化锰产品、制备方法及其应用 |
CN111554932A (zh) * | 2020-05-11 | 2020-08-18 | 中科廊坊过程工程研究院 | 一种高性能复合正极材料、其制备方法和用途 |
CN114899385A (zh) * | 2022-06-10 | 2022-08-12 | 江西省纳米技术研究院 | 碳/二氧化锰复合材料及其制备方法与应用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101599370A (zh) * | 2009-04-23 | 2009-12-09 | 哈尔滨工程大学 | 一种快速制备导电碳/二氧化锰复合电极材料的方法 |
US20120236467A1 (en) * | 2011-03-16 | 2012-09-20 | Vanderbilt University, Center For Technology Transfer And Commercialization | Ultracapacitor, methods of manufacturing and applications of the same |
CN104465130A (zh) * | 2014-12-16 | 2015-03-25 | 吉林大学 | 一种超级电容器电极材料的制备方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101599370A (zh) * | 2009-04-23 | 2009-12-09 | 哈尔滨工程大学 | 一种快速制备导电碳/二氧化锰复合电极材料的方法 |
US20120236467A1 (en) * | 2011-03-16 | 2012-09-20 | Vanderbilt University, Center For Technology Transfer And Commercialization | Ultracapacitor, methods of manufacturing and applications of the same |
CN104465130A (zh) * | 2014-12-16 | 2015-03-25 | 吉林大学 | 一种超级电容器电极材料的制备方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107761195A (zh) * | 2017-10-26 | 2018-03-06 | 青岛大学 | 一种用于超级电容器电极的木质素基纳米碳纤维制备方法 |
CN107946085A (zh) * | 2017-11-22 | 2018-04-20 | 湖南科技大学 | 一种表面修饰的氮掺杂碳空心球负载的二氧化锰产品、制备方法及其应用 |
CN111554932A (zh) * | 2020-05-11 | 2020-08-18 | 中科廊坊过程工程研究院 | 一种高性能复合正极材料、其制备方法和用途 |
CN111554932B (zh) * | 2020-05-11 | 2021-12-28 | 廊坊绿色工业技术服务中心 | 一种高性能复合正极材料、其制备方法和用途 |
CN114899385A (zh) * | 2022-06-10 | 2022-08-12 | 江西省纳米技术研究院 | 碳/二氧化锰复合材料及其制备方法与应用 |
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