首页|氮掺杂碳纳米纤维负载NiCo-LDH纳米片用于超级电容器

氮掺杂碳纳米纤维负载NiCo-LDH纳米片用于超级电容器

NiCo-LDH nanosheet anchored on N-doped carbon nanofiber for supercapacitor

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利用静电纺丝法和高温碳化法制备了氮掺杂碳纳米纤维(NCNF),通过水热合成反应法在NCNF表面原位生长镍钴层状双氢氧化物(NiCo-LDH)纳米片,制备出核壳结构的NiCo-LDH/NCNF复合材料.对样品的形貌和结构进行表征,并对复合材料进行电化学性能测试.结果显示:NiCo-LDH/NCNF在1、10 A/g的电流密度下,比电容可达2 822.9、2 178.8 F/g,电容保持率高达77.2％;在连续充放电循环6 000次后,电容保持率仍可达到91.8％,循环稳定性能优异.以NiCo-LDH/NCNF为正极,活性炭(AC)为负极组装的非对称超级电容器(NiCo-LDH/NCNF//AC)在1 A/g电流密度下,比电容为226.1 F/g,在742.1 W/kg功率密度下,能量密度高达69.2 Wh/kg.表明NiCo-LDH/NCNF复合材料是一种极具潜力的能量转换与存储材料.
Nitrogen doped carbon nanofibers(NCNF)are prepared by electrospinning method and high-temperature carbonization methods,and nickel cobalt layered double hydroxide(NiCo LDH)nanosheets are in-situ grown on the surface of NCNF through hydrothermal synthesis reaction to produce NiCo LDH/NCNF composite with core-shell structure.The morphology and structure of NiCo LDH/NCNF composite are demonstrated,and the electrochemical properties of composite are tested.The results show that the specific capacitance can reach 2 822.9 F/g at 1 A/g,and still reach 2 178.8 F/g at 10 A/g,and the capacitance retention rate is as high as 77.2％,demonstrating excellent rate performance.After 6000 charge-discharge cycles,the capacitance retention is 91.8％,indicating excellent cycle stability performance.An asymmetric supercapacitor(ASC)assembled using NiCo LDH/NCNF as the positive electrode and activated carbon(AC)as the negative electrode has a specific capacitance of 226.1 F/g at 1 A/g,a high energy density of up to 69.2 Wh/kg with a power density of 742.1 W/kg.Therefore,the NiCo LDH/NCNF composite could be as promising electrode materials for energy conversion and storage.

electrospinningnitrogen doped carbon nanofiberNiCo-LDHnanosheetsupercapacitorelectrochemical property

李净珊、徐洋洋、叶仪鹏、董梦娇、李秉芯、陈昊天

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中原工学院纺织服装产业研究院,河南郑州 450007

中原工学院国际教育学院,河南郑州 450007

静电纺丝 氮掺杂碳纳米纤维 镍钴层状双氢氧化物 纳米片 超级电容器 电化学性能

河南省高等学校重点研发项目河南省重点研发与推广专项(科技攻关)指导项目中国纺织工业联合会科技指导项目中原工学院青年人才能力基金项目

23A4300082221022300472021047K2020QN006

2024

上海纺织科技
上海市纺织科学研究院

上海纺织科技

CSTPCD
影响因子：0.476
ISSN：1001-2044
年,卷(期)：2024.52(10)