Ultrafine Co3O4 Nanoparticles within Nitrogen‐Doped Carbon Matrix Derived from Metal–Organic Complex for Boosting Lithium Storage and Oxygen Evolution Reaction

Transition metal oxides have recently received great attention for application in advanced lithium‐ion batteries (LIBs) and oxygen evolution reaction (OER). Herein, the ethylenediaminetetraacetic cobalt complex as a precursor to synthesize ultrafine Co3O4 nanoparticles encapsulated into a nitrogen‐d...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2019-11, Vol.15 (46), p.n/a
Main Authors: Zhang, Jingyuan, Qian, Bin, Sun, Shuo, Tao, Shi, Chu, Wangsheng, Wu, Dajun, Song, Li
Format: Article
Language:English
Subjects:
Cobalt compounds
cobalt oxide
Cobalt oxides
Coordination compounds
Energy conversion
Energy storage
Lithium
Lithium-ion batteries
lithium‐storage
metal–organic complexes
Nanoparticles
Nanotechnology
oxygen evolution reaction
Oxygen evolution reactions
Precursors
Pyrolysis
Structural hierarchy
Structural integrity
Transition metal oxides
Ultrafines
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Summary:Transition metal oxides have recently received great attention for application in advanced lithium‐ion batteries (LIBs) and oxygen evolution reaction (OER). Herein, the ethylenediaminetetraacetic cobalt complex as a precursor to synthesize ultrafine Co3O4 nanoparticles encapsulated into a nitrogen‐doped carbon matrix (NC) composites is presented. The as‐prepared Co3O4/NC‐350 obtained by pyrolysis at 350 °C demonstrates superior rate performance (372 mAh g−1 at 5.0 A g−1) and high cycling stability (92% capacity retention after 300 cycles at 1.0 A g−1) as anode for LIBs. When evaluated as an electrocatalyst for OER, the Co3O4/NC‐350 achieves an overpotential of 298 mV at a current density of 10 mA cm−2. The NC‐encapsualted porous hierarchical structure assures fast and continuous electron transportation, high activity sites, and strong structural integrity. This works offers novel complex precursors for synthesizing transition metal–based electrodes for boosting electrochemical energy conversion and storage. Ultrafine Co3O4 nanoparticle confined into the nitrogen‐doped carbon framework are synthesized by calcining ethylenediaminetetraacetic transition metal precursors for the first time and demonstrate superior lithium‐storage properties and oxygen evolution reduction activity.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201904260