化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (11) : 229-233. DOI: 10.19817/j.cnki.issn1006-3536.2022.11.046

开发与应用

NiCo₂O₄纳米笼的制备及其在超级电容器中的应用

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^1,3*

作者信息 +

Preparation of NiCo₂O₄ nanocages and its applications in supercapacitors

Li Xue^1,3, He Gege², Tian Liangliang³, Cheng Zhengfu^1,3

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文章历史 +

Received		Published
2021-07-12		2022-11-20
Issue Date	Revised Date
2022-11-30	2021-07-12

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摘要

二维片状NiCo₂O₄具有特殊的各向异性结构和较高的理论比容量,在电储能领域有特殊的应用前景,但常见的二维NiCo₂O₄容易发生团聚,导致其储能性能下降。通过简单的协同腐蚀沉淀策略(CEP)及退火工艺成功制备出NiCo₂O₄纳米笼,该空心结构由片状NiCo₂O₄相互交错形成,有效的三维支撑腔体减少了团聚,同时多孔结构提供了应力释放空间,改善了电化学储能性能。结果表明,电极在3.5A/g电流密度下,比电容高达1688F/g,在10A/g条件下循环1000次依旧能够保持原比电容的87.7%。表明将二维片状材料组装形成笼状结构可以有效提升电化学储能性能。

Abstract

The two-dimensional NiCo₂O₄ sheets have special anisotropic structure and high theoretical capacitance,displaying an outstanding application prospect for energy storage.However,the common NiCo₂O₄ nanosheets are prone to agglomeration,which leads to the degradation of the energy storage performance.The NiCo₂O₄ nanocages were successfully prepared by a simple coordinated etching and precipitation (CEP) method and a post annealing process.The hollow structure was composed of interacted NiCo₂O₄ nanosheets,forming a three-dimensional architecture,which effectively supported cavity and reduced the agglomeration of nanosheets.Moreover,the porous structure provided spaces for stress release and improved the electrochemical performance.The specific capacitance of the electrode was as high as 1688F/g at 3.5A/g current density,and still retained 87.7% of the original specific capacitance after 1000 cycles at 10A/g.The results revealed that the assembling of nanosheets into three-dimensional cage-like structure was effective to improve energy storage performance.

关键词

过渡金属氧化物 / NiCo₂O₄ / 纳米笼 / 协同腐蚀沉淀 / 电容器

Key words

transition metal oxide / NiCo₂O₄ / nanocages / coordinated etching and precipitation / supercapacitor

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NiCo₂O₄纳米笼的制备及其在超级电容器中的应用[J]. 化工新型材料, 2022, 50(11): 229-233 DOI:10.19817/j.cnki.issn1006-3536.2022.11.046

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基金资助

国家自然科学基金(21403020)

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