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多孔镍钴层状双金属氢氧化物阵列的制备 及其电容性能

作者:时间:2024-09-11点击数:



全文下载: 202404010.pdf


文章编号: 1672-6987202404-0067-08 DOI 10.16351/j.1672-6987.2024.04.010



董世豪1a 刘岩1a 李春2 李镇江1b 范晓彦1a*(1.青岛科技大学 a.数理学院;b.材料科学与工程学院,山东 青岛 266061 2. 中国海洋大学 物理与光电工程学院,山东 青岛 266069


摘要: 通过一步水热的方法在泡沫镍(NF)基底上生长了镍钴层状双金属氢氧化物(NiCo-LDHs)阵列。研究了NiCo的物质的量比对其晶相结构、形貌和电容性能的影响。在n(Ni)∶nCo=2∶2时获得高电容量和高循环稳定性的Ni2Co2-LDH有序致密的多孔纳米针阵列。在电流密度1 A·g-1时,比电容高达2 381 F·g-1;在电流密度10 A·g-1时,电容率保持率为571%4 500次充放电循环后电容率保持高达60%。最后,以Ni2Co2-LDH@NF为正极,以活性炭为负极构建了非对称电容器。在电流密度为1 A·g-1时,该非对称电容器的比容量为2114 F·g-1。在电流密度5 A·g-1时,5 000次充放电循环后电容保持率高达90%。在116 kW·kg-1的功率密度下拥有731 Wh·kg-1的能量密度。


关键词: 层状双金属氢氧化物; 阵列; 超级电容器


中图分类号: O 646文献标志码: A


引用格式: 董世豪,刘岩,李春,等. 多孔镍钴层状双金属氢氧化物阵列的制备及其电容性能[J. 青岛科技大学学报(自然科学版), 2024, 454): 67-74.


DONG Shihao, LIU Yan, LI Chun,et al. Preparation of porous nickel-cobalt layered double hydroxide arrays and its capacitance performanceJ. Journal of Qingdao University of Science and TechnologyNatural Science Edition), 2024 454): 67-74.


Preparation of Porous Nickel-Cobalt Layered Double Hydroxide

Arrays and Its Capacitance Performance


DONG Shihao1a, LIU Yan1a, LI Chun2, LI Zhenjiang1b, FAN Xiaoyan1a

(1.a.College of Mathematics and Physics; b. College of Materials Science and Engineering, Qingdao University of Science and Technology,

Qingdao 266061, China; 2. Department of Physics, Ocean University of China, Qingdao 266069, China)


Abstract: In this paper, nickel-cobalt layered double hydroxides (NiCo-LDHs) were synthesized on nickel foam (NF) by one-step hydrothermal method. The effects the molar ratio Ni and CO on the crystal structure, morphology and capacitive properties were studied. When n(Ni)∶nCo=2∶2,ordered and dense porous Ni2Co2-LDHs nanoneedle arrays with high capacitance and high cycle stability were obtained. The specific capacitance is 2 381 F·g-1 at 1 A·g-1, the capacitance retention rate is 571% at 10 A·g-1 and 60% after 4 500 charge discharge cycles, respectively. Finally, an asymmetric supercapacitor was constructed with Ni2Co2- LDH@NF as the positive electrode material and commercial activated carbon as the negative electrode material. The specific capacitance is 2114 F·g-1 at 1 A·g-1, the capacitance retention rate is 90% after 5 000 charge-discharge cycles at 5 A·g-1. It has an energy density of 731 kW·kg-1 at a power density of 116 kW·kg-1.


Key words: nickel cobalt layered double hydroxide; arrays; supercapacitors


收稿日期: 2023-10-01

基金项目: 山东省自然科学基金项目(ZR2020ME042.

作者简介: 董世豪(1995—),男,硕士研究生.*通信联系人.



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