Co-MOF-derived stalk-flower like NiCo-LDH homostructure towards boosting electrochemical energy storage  

作　　者：Panpan Li Xiaoliang Wang Shaobin Yang Jian Qi 

机构地区：[1]College of Mining,College of Materials Science and Engineering,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,Liaoning Technical University,Fuxin,123000,China [2]Department of Architecture and Civil Engineering,Lyuliang University,Lvliang,033000,China [3]State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Progress in Natural Science:Materials International》2024年第6期1236-1248,共13页自然科学进展·国际材料(英文版)

基　　金：the National Natural Science Foundation of China(No.51974152),for financial support

摘　　要：The rational design of the heterostructure of multi-component materials acts on electrochemical properties.However,the effect of structure and component alone on the performance is ignored.Homostructure can reflect the advantages of structural design more directly and fully tap the potential of the material itself.Herein,the homogeneous stereostructure with NiCo-LDH nanostalks(NiCo-LDHS)and NiCo-LDH nanoflowers(NiCo-LDHF)was synthesized through simultaneous Co-MOF in-situ etch and electrodeposition.NiCo-LDHSnot only preserves the shape of MOF rods,but also forms a firm adhesion to nickel foam.The coated NiCo-LDHFon NiCo-LDHS increases the loading of pseudocapacity material.As a result of the high capacity of Ni(OH)_(2),the high conductivity of Co(OH)_(2),as well as the stalk-flower stereostructure,the NiCo-LDHS-Felectrode demonstrates a specific capacity of 2058 F g^(-1)(13994 mF cm^(-2))at 1 A g^(-1),along with an ultrahigh rate capability,retaining 73.9%of its capacity at 20 A g^(-1).Moreover,the assembled NiCo-LDHS-F//AC hybrid supercapacitor(HSC)exhibits striking energy and power densities of 48.44 Wh·kg^(-1)(0.78 m Wh·cm^(-2))and 800 W kg^(-1)(12.8 mW cm^(-2)),respectively.Notably,after 10,000 consecutive charging and discharging cycles,the device maintains a capacity retention of85.36%,demonstrating its good cycling stability.These findings prove the essentiality of designing homogeneous structure for the advancement of energy storage performance.

关 键 词：Co-MOF Sacrificial template Electrodeposition NiCo-LDH Homostructure SUPERCAPACITOR 

分 类 号：TM53[电气工程—电器] O646[理学—物理化学] TB383.1[理学—化学]