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Assembly of GO Nanosheets–Coated Zeolitic Imidazolate Framework‐67 Nanocubes via Electrospinning and Their Derivatives for Enhanced Lithium‐Ion Storage Performance
Author(s) -
Li Hao,
Lu Bing-Rong,
Zhang Wu-Di,
Cao Fu-Hu,
Li Hao,
Zhang Chuan-Ling
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000209
Subject(s) - materials science , electrospinning , anode , zeolitic imidazolate framework , chemical engineering , imidazolate , crystallinity , porosity , nanofiber , lithium (medication) , nanoparticle , lithium ion battery , nanotechnology , coating , sintering , electrode , adsorption , battery (electricity) , metal organic framework , composite material , chemistry , polymer , organic chemistry , medicine , power (physics) , physics , endocrinology , quantum mechanics , engineering
Zeolitic imidazolate framework‐67 (ZIF‐67)‐derived Co 3 O 4 /N‐doped porous carbon hybrids have drawn great attention as anode materials for lithium‐ion batteries (LIBs) because of their unique advantages. Herein, based on the electrospinning‐assisted assembly method, two strategies are used to further enhance the stability and capacity of the anodes; one is increasing the crystallinity of ZIF‐67 nanocubes (NCs) to raise the specific surface area and porosity, and the other is coating GO nanosheets on the surfaces of ZIF‐67 (ZIF‐67@GO) to improve the conductivity and capacity and buffer the sintering during the cycling process. After electrospinning of ZIF‐67@GO NCs followed by a two‐step thermal treatment, hollow Co 3 O 4 nanoparticles encapsulated N‐doped porous carbon nanofibers with high graphitization degree are constructed (ES‐CNCo 3 O 4 @rGO). When applied as the anode for LIBs, the ES‐CNCo 3 O 4 @rGO electrode exhibits excellent rate capability and high specific capacity as well as stable cycling performance (1315 mAh g −1 after 100 cycles at 0.1 A g −1 and 1234 mAh g −1 after 500 cycles at 1 A g −1 ).