Journal ArticleDOI
MOF-derived bi-metal embedded N-doped carbon polyhedral nanocages with enhanced lithium storage
Man Huang,Man Huang,Kan Mi,Junhao Zhang,Huili Liu,Tingting Yu,Aihua Yuan,Qinghong Kong,Shenglin Xiong +8 more
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TLDR
In this article, an effective and controllable strategy was developed to construct porous bimetallic Co/Zn embedded N-doped carbon polyhedral nanocages via annealing a ZIF-8@ZIF-67 precursor at 800 °C under Ar atmosphere.Abstract:
To tackle the issue of the low specific capacity (372 mA h g−1) of graphite as the anode material for lithium-ion batteries (LIBs), an effective and controllable strategy was developed to construct porous bimetallic Co/Zn embedded N-doped carbon (Co–Zn/N–C) polyhedral nanocages via annealing a ZIF-8@ZIF-67 precursor at 800 °C under Ar atmosphere. The results clearly displayed that metallic Co and Zn particles are uniformly dispersed in the carbon matrix. Porous Co–Zn/N–C polyhedral nanocages have a large specific surface area of 349.12 m2 g−1 and contain plenty of micropores and mesopores, which benefit from the carbonization of organic ligands and the catalytic effect of cobalt in the calcination process. As anodes for LIBs, the porous Co–Zn/N–C polyhedral nanocages showed an initial discharge capacity of 809 mA h g−1 and a capacity retention of 702 mA h g−1 after 400 cycles at a current density of 0.2 A g−1. Furthermore, a reversible capacity of 444 mA h g−1 was obtained at a much higher current density of 2 A g−1. The improved electrochemical performance was attributed to the synergistic effect of Zn and Co, the unique porous hollow structure as well as N doping, which relieved the impact of volume changes, maintained perfect electrical conductivity throughout the electrode and enhanced the electrochemical activities of lithium storage.read more
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Enhanced Capacity and Rate Capability of Nitrogen/Oxygen Dual-Doped Hard Carbon in Capacitive Potassium-Ion Storage.
Jinlin Yang,Jinlin Yang,Zhicheng Ju,Zhicheng Ju,Yong Jiang,Zheng Xing,Baojuan Xi,Jinkui Feng,Shenglin Xiong +8 more
TL;DR: Nitrogen/oxygen dual-doped hierarchical porous hard carbon (NOHPHC) is introduced as the anode in KIBs by carbonizing and acidizing the NH2 -MIL-101(Al) precursor to improve the specific capacity and electrochemical performance of potassium-ion batteries.
Journal ArticleDOI
Carbon nanocages with N-doped carbon inner shell and Co/N-doped carbon outer shell as electromagnetic wave absorption materials
TL;DR: In this paper, a carbon nanocage was synthesized by direct pyrolysis of a core-shell ZIF-8@ZIF-67 polyhedron.
Journal ArticleDOI
Advanced Carbon-Based Anodes for Potassium-Ion Batteries
Xuan Wu,Xuan Wu,Yanli Chen,Zheng Xing,Christopher W.K. Lam,Su-Seng Pang,Wei Zhang,Zhicheng Ju +7 more
Journal ArticleDOI
Applications of Metal-Organic-Framework-Derived Carbon Materials.
TL;DR: Here, many kinds of carbon materials derived from metal-organic frameworks are introduced with a particular focus on their promising applications in batteries, supercapacitors, electrocatalytic reactions, water treatment, and other possible fields.
Journal ArticleDOI
Hollow Ni/C microspheres derived from Ni-metal organic framework for electromagnetic wave absorption
TL;DR: In this paper, a hollow nickel/carbon (Ni/C) microsphere was synthesized by in situ pyrolysis of the Ni-based trimellitic acid framework (Ni-MOF) at argon atmosphere.
References
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Exceptional chemical and thermal stability of zeolitic imidazolate frameworks
Kyo Sung Park,Zheng Ni,Adrien P. Côté,Jae Yong Choi,Rudan Huang,Fernando J. Uribe-Romo,Hee K. Chae,Michael O'Keeffe,Omar M. Yaghi +8 more
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Journal ArticleDOI
A metal–organic framework-derived bifunctional oxygen electrocatalyst
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Journal ArticleDOI
Nitrogen-doped mesoporous carbon of extraordinary capacitance for electrochemical energy storage
Tianquan Lin,I-Wei Chen,Fengxin Liu,Chongyin Yang,Hui Bi,Fangfang Xu,Fuqiang Huang,Fuqiang Huang +7 more
TL;DR: It is found that a nitrogen-doped ordered mesoporous few-layer carbon has a capacitance of 855 farads per gram in aqueous electrolytes and can be bipolarly charged or discharged at a fast, carbon-like speed and can store a specific energy of 41 watt-hours per kilogram (19.5 watt- hours per liter).
Journal ArticleDOI
Partially oxidized atomic cobalt layers for carbon dioxide electroreduction to liquid fuel
Shan Gao,Yue Lin,Xingchen Jiao,Yongfu Sun,Qiquan Luo,Wenhua Zhang,Dianqi Li,Jinlong Yang,Yi Xie +8 more
TL;DR: In this paper, the role of the two different catalytic sites of pure cobalt and coexisting domains of cobalt metal and cobalt oxide has been evaluated, showing that surface cobalt atoms of the atomically thin layers have higher intrinsic activity and selectivity towards formate production, at lower overpotentials.