Co金属有机骨架模板制备NiCo水滑石/泡沫镍复合材料及电容性能  

Preparation by Co metal-organic framework template and capacitive properties of NiCo-layered double hydroxide/nickel foam composites

作　　者：王晓亮[1] 张多 石雪梅 乔心页 程焱 赵浩男 常雷明 于振秋 黄传辉[2] 杨绍斌[1] WANG Xiao‑Liang;ZHANG Duo;SHI Xue‑Mei;QIAO Xin‑Ye;CHENG Yan;ZHAO Hao‑Nan;CHANG Lei‑Ming;YU Zhen‑Qiu;HUANG Chuan‑Hui;YANG Shao‑Bin(Geology and Mineral Engineering Special Materials Professional Technology Innovation Center of Liaoning Province,Key Laboratory of Mineral High Value Conversion and Energy Storage Materials of Liaoning Province,College of Materials Science&Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China;School of Mechanical&Electrical Engineering,Xuzhou University of Technology,Xuzhou,Jiangsu 221000,China;Liaohe Oilfield Training Center,Panjin,Liaoning 124000,China)

机构地区：[1]辽宁工程技术大学材料与工程学院,辽宁省地矿工程特种材料专业技术创新中心,辽宁省矿物高值化与储能材料重点实验室,阜新123000 [2]徐州工程学院机电工程学院,徐州221000 [3]辽河油田培训中心,盘锦124000

出　　处：《无机化学学报》2023年第4期607-616,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金项目(No.51974152);辽宁工程技术大学学科创新团队支持项目(No.LNTU20TD-9,LNTU20TD-16)资助。

摘　　要：通过两步法先在泡沫镍(nickel foam,NF)上原位生长Co金属有机骨架(Co metal-organic framework,Co-MOF)纳米片阵列,再浸入不同浓度Ni^(2+)离子溶液刻蚀Co-MOF纳米片,在NF表面得到NiCo水滑石(NiCo layered double hydroxide,NiCo-LDH)。NiCo-LDH/NF继承了Co-MOF纳米片结构形成一级纳米片阵列,并在一级纳米片表面形成次级纳米片褶皱。在2 mmol Ni(NO_(3))2·6H_(2)O溶液中刻蚀得到的NiCo-LDH/NF表现出高容量、高倍率性能,在电流密度为5 mA·cm^(-2)时比电容为7 764.5 mF·cm^(-2),电流密度为20 mA·cm^(-2)时比电容为6 098.2 mF·cm^(-2),容量保持率为78.5%,在20 A·g^(-1)电流密度下经过5 000次长循环后,容量保持率为85.9%。与活性炭组装的混合电容器达到38.9 Wh·kg^(-1)的最大能量密度和8 000.0 W·kg^(-1)的最大功率密度。Using a two‑step method,a Co metal‑organic framework(Co‑MOF)nanosheet array was grown in situ on nickel foam(NF),and then Co‑MOF nanosheets were etched with different concentrations of Ni^(2+)ion solution to obtain NiCo layered double hydroxide(NiCo‑LDH).NiCo‑LDH/NF inherits the Co‑MOF nano‑sheet structure to form a primary nano‑sheet array and a secondary nano‑sheet fold on the surface of the primary nano‑sheet.NiCo‑LDH/NF obtained by etching in 2 mmol Ni(NO_(3))2·6H_(2)O solution showed a small number of thin and folded secondary nano‑sheets grown on the primary nano‑sheet array,exhibited a high capacitance and high rate performance,had a specific capacitance of 7764.5 and 6098.2 mF·cm^(-2) at a current density of 5 and 20 mA·cm^(-2),and capacitance retention rate of 78.5%.After 5000 cycles at a current density of 20 A·g^(-1),the capacitance retention rate was 85.9%.The hybrid capacitor assembled by NiCo‑LDH/NF and active carbon achieved an maximum energy density of 38.9 Wh·kg^(-1) and a maximum power density of 8000.0 W·kg^(-1).

关 键 词：金属有机骨架化合物 层状双金属氢氧化物 超级电容器 复合材料 原位生长 

分 类 号：O614.81[理学—无机化学]