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首页> 外文期刊>Applied Surface Science >Synthesis of Co3O4/NiO nanofilms and their enhanced electrochemical performance for supercapacitor application
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Synthesis of Co3O4/NiO nanofilms and their enhanced electrochemical performance for supercapacitor application

机译：Co3O4 / NiO纳米膜的合成及其在超级电容器中的电化学性能增强

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摘要

Transition metallic oxides have attracted considerable attention for supercapacitor applications because of their superior electrochemical performance at relatively low cost. Co3O4/NiO nanofilms were successfully prepared by calcination of precursor alpha-Co(OH)(2)/alpha-Ni(OH)(2). XRD, XPS, SEM and TEM techniques were used to characterize the composition and morphology of as-prepared samples. The results demonstrated that Co3O4/NiO nanofilms presented graphene-like morphology with shrinkage and wrinkles. The Brunauer-Emmett-Teller (BET) measurement showed that specific surface area of Co3O4/NiO was 176.5 m(2)/g. Electrochemical properties tests indicated that the Co3O4/NiO nanofilms had a higher specific capacitance and better rate capability than that of precursor alpha-Co(OH)(2)/alpha-Ni(OH)(2) at high current density. As to the cycling performance, the specific capacitance of Co3O4/NiO electrode would first increase from 556 F/g to 710 Fig quickly at 2 A/g after 80 cycles and then remained stable. Therefore, compared with that of precursor alpha-Co(OH)(2)/alpha-Ni(OH)(2), the capacitance performance of as-prepared Co3O4/NiO nanofilms was improved after calcination. The possible reason for the enhancement of capacitance performance was discussed. (C) 2016 Elsevier B.V. All rights reserved.
机译：过渡金属氧化物因其优越的电化学性能和相对较低的成本而在超级电容器应用中引起了极大的关注。通过煅烧前体α-Co（OH）（2）/α-Ni（OH）（2）成功制备了Co3O4 / NiO纳米膜。使用XRD，XPS，SEM和TEM技术表征了所制备样品的组成和形态。结果表明，Co3O4 / NiO纳米薄膜呈现出类似石墨烯的形貌，并具有收缩和皱纹。 Brunauer-Emmett-Teller（BET）测量显示Co3O4 / NiO的比表面积为176.5 m（2）/ g。电化学性能测试表明，在高电流密度下，Co3O4 / NiO纳米膜比前体α-Co（OH）（2）/ alpha-Ni（OH）（2）具有更高的比电容和更好的倍率性能。关于循环性能，在80次循环后，Co3O4 / NiO电极的比电容首先会以2 A / g的速度从556 F / g快速增加到710 Fig。因此，与前体α-Co（OH）（2）/α-Ni（OH）（2）相比，煅烧后制备的Co3O4 / NiO纳米膜的电容性能得到改善。讨论了提高电容性能的可能原因。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2016年第may1期|528-535|共8页
  • 作者

    Zuo Yong; Ni Jing-Jing; Song Ji-Ming; Niu He-Lin; Mao Chang-Jie; Zhang Sheng-Yi; Shen Yu-Hua;

  • 作者单位

    Anhui Univ, Key Lab Environm Friendly Polymer Mat Anhui Prov, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China;

    Anhui Univ, Key Lab Environm Friendly Polymer Mat Anhui Prov, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China|Bengbu Design & Res Inst Glass Ind, State Key Lab Adv, Technol Float Glass, 751 Donghai Rd, Bengbu 233018, Anhui, Peoples R China;

    Anhui Univ, Key Lab Environm Friendly Polymer Mat Anhui Prov, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China;

    Anhui Univ, Key Lab Environm Friendly Polymer Mat Anhui Prov, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China;

    Anhui Univ, Key Lab Environm Friendly Polymer Mat Anhui Prov, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China;

    Anhui Univ, Key Lab Environm Friendly Polymer Mat Anhui Prov, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China;

    Anhui Univ, Key Lab Environm Friendly Polymer Mat Anhui Prov, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Co3O4/NiO nanofilms; Calcination; Electrochemical; Supercapacitor;

    机译：Co3O4 / NiO纳米薄膜;煅烧;电化学;超级电容器;

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