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Hierarchical Porous NiCo 2 O 4 Microboxes Constructed by Low‐Dimensional Substructures for Electrochemical Supercapacitor
Author(s) -
Zhu Tuyuan,
Zhang Huiwen,
Sha Ying,
Huang Yingchong,
Li Yuqi,
Zhao Dian,
Gao Xuehui
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201900295
Subject(s) - supercapacitor , capacitance , superstructure , capacitor , materials science , electrochemistry , porosity , nanowire , electrode , nanotechnology , optoelectronics , composite material , chemical engineering , voltage , electrical engineering , structural engineering , chemistry , engineering
The design and synthesis of new materials/structures for high‐performance electrochemical capacitors (ECs) is an ongoing challenge. Herein, a hierarchical porous NiCo 2 O 4 microbox superstructure made of low‐dimensional substructures was reported. The as‐prepared NiCo 2 O 4 microboxes are constructed by 2D nanosheets building units, which are futher woven by 0D nanoparticles and 1D nanowires. Such microbox superstructures combine the merits of all material dimensions in electrochemical capacitors, such as high porosity, sufficient active sites, and fast mass and charge transport. Benefiting from the structural advantages, the resultant NiCo 2 O 4 microbox electrode exhibits ultra‐high capacitor performance, i.e., the initial capacitance of 1820 F · g –1 and 96.6 % capacitance retention after 4000 cycles at 5 A · g –1 .