Flower-like NiCo2O4 from Ni-Co 1, 3, 5-benzenetricarboxylate metal organic framework tuned by graphene oxide for high-performance lithium storage. (20th July 2018)

• Record Type: Journal Article
• Authors: Gan, Qingmeng; Liu, Bingjun; Zhao, Kuangmin; He, Zhen; Liu, Suqin
• Is Part Of: Electrochimica acta. Volume 279(2018)
• Page Start: 152
• Page End: 160
• Publication Date: 2018-07-20
• Subjects: Lithium-ion batteries -- Metal organic framework -- Flower-like structure -- Graphene -- Growth mechanism; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.05.055
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Three-dimensional (3D) flower-like NiCo2 O4 (F-NiCo2 O4 ) is synthesized through using graphene oxide (GO) as "designer additives" to induce Ni-Co 1, 3, 5-benzenetricarboxylate metal-organic framework (Ni-Co-BTC MOF) from nanoparticles to form nanoneedles, and then further self-assembles to a 3D flower-like morphology. A possible process of morphological change is described in detail according to the changing amount of GO and reaction time. The as-prepared unique structure constructed by ultrafine subunits exhibits a high specific surface area (152.8 m 2 g −1 ) and plentiful mesopores. As an anode in lithium-ion battery, F-NiCo2 O4 shows a high capacity of 1167 mA h g -1 at a current density of 200 mA g −1 and even maintains 333 mA h g -1 at a high rate of 5000 mA g −1 . Moreover, the 3D flower-like F-NiCo2 O4 remains a high capacity of 1067 mA h g -1 at 1000 mA g −1 after 400 cycles. The novel method in this work paves a new way to form 3D structure by using GO to induce MOF aggregation, which may be extended to preparing other metal/metal oxides materials for electrochemical energy-storage systems.