PatentDOI
Metal-free bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
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TLDR
A mesoporous carbon foam co-doped with nitrogen and phosphorus that has a large surface area and good electrocatalytic properties for both ORR and OER and is tested as an air electrode for primary and rechargeable Zn-air batteries.Abstract:
A co-doped carbon material, methods of making such materials, and electrochemical cells and devices comprising such materials are provided. The co-doped carbon material comprises a mesoporous carbon material doped with nitrogen and phoshporous (NPMC). The present NPMC exhibit catalytic activity for both oxygen reduction reaction and oxygen evolution reaction and may be useful as an electrode in an electrochemical cell and particularly as part of a battery. The present NPMC materials may be used as electrodes in primary zinc-air batteries and in rechargeable zinc-air batteries and many other energy systems.read more
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Journal ArticleDOI
Metal–organic framework-derived one-dimensional porous or hollow carbon-based nanofibers for energy storage and conversion
Chaohai Wang,Yusuf Valentino Kaneti,Yusuf Valentino Kaneti,Yoshio Bando,Yoshio Bando,Jianjian Lin,Chao Liu,Jiansheng Li,Yusuke Yamauchi,Yusuke Yamauchi +9 more
TL;DR: In this paper, a mini review of the development of metal organic framework (MOF)-derived 1D porous or hollow carbon nanofibers using the electrospinning method and their application in energy storage (e.g., supercapacitors and rechargeable batteries) and conversion devices (e., fuel cells) is presented.
Journal ArticleDOI
Active Sites and Mechanism of Oxygen Reduction Reaction Electrocatalysis on Nitrogen-Doped Carbon Materials.
TL;DR: Based on the increased knowledge in controlling ORR performances, bottom-up preparation of N-doped carbon catalysts, using N-containing conjugative molecules as the assemblies of the catalysts is promising.
Journal ArticleDOI
NiCo Alloy Nanoparticles Decorated on N-Doped Carbon Nanofibers as Highly Active and Durable Oxygen Electrocatalyst
Yue Fu,Hai-Yang Yu,Cong Jiang,Tian-Heng Zhang,Run Zhan,Xiaowei Li,Jian-Feng Li,Jing-Hua Tian,Ruizhi Yang +8 more
TL;DR: In this article, a hybrid catalyst with NiCo alloy nanoparticles decorated on N-doped carbon nanofibers is synthesized by a facile electrospinning method and postcalcination treatment.
Journal ArticleDOI
An Aqueous Rechargeable Zn//Co3 O4 Battery with High Energy Density and Good Cycling Behavior.
Xiaowei Wang,Xiaowei Wang,Faxing Wang,Liying Wang,Liying Wang,Minxia Li,Yanfang Wang,Bingwei Chen,Yusong Zhu,Lijun Fu,Liusheng Zha,Lixin Zhang,Yuping Wu,Yuping Wu,Wei Huang +14 more
TL;DR: An aqueous rechargeable Zn//Co3 O4 battery is demonstrated with Zn@carbon fibers and Co3 O3 @Ni foam as the negative and positive electrodes, respectively, using an electrolyte of 1 m KOH and 10 × 10(-3) m Zn(Ac)2 .
Journal ArticleDOI
Co Nanoislands Rooted on Co-N-C Nanosheets as Efficient Oxygen Electrocatalyst for Zn-Air Batteries.
Peng Yu,Lei Wang,Fanfei Sun,Ying Xie,Xu Liu,Jingyuan Ma,Xiuwen Wang,Chungui Tian,Jinghong Li,Honggang Fu +9 more
TL;DR: The synthesis of Co nanoislands rooted on Co-N-C nanosheets supported by carbon felts (Co/Co-N/C) is reported, which leads to good bifuctional catalytic performances of Zn-air batteries.
References
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Journal ArticleDOI
Electrical Energy Storage for the Grid: A Battery of Choices
TL;DR: The battery systems reviewed here include sodium-sulfur batteries that are commercially available for grid applications, redox-flow batteries that offer low cost, and lithium-ion batteries whose development for commercial electronics and electric vehicles is being applied to grid storage.
Journal ArticleDOI
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode
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TL;DR: In this paper, the stability of reaction intermediates of electrochemical processes on the basis of electronic structure calculations was analyzed and a detailed description of the free energy landscape of the electrochemical oxygen reduction reaction over Pt(111) as a function of applied bias was presented.
Journal ArticleDOI
Nitrogen-doped carbon nanotube arrays with high electrocatalytic activity for oxygen reduction.
TL;DR: It is reported that vertically aligned nitrogen-containing carbon nanotubes (VA-NCNTs) can act as a metal-free electrode with a much better electrocatalytic activity, long-term operation stability, and tolerance to crossover effect than platinum for oxygen reduction in alkaline fuel cells.
Journal ArticleDOI
Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces
Isabela C. Man,Hai-Yan Su,Federico Calle-Vallejo,Heine Anton Hansen,José I. Martínez,Nilay İnoğlu,John R. Kitchin,Thomas F. Jaramillo,Jens K. Nørskov,Jan Rossmeisl +9 more
TL;DR: In this article, a large database of HO* and HOO* adsorption energies on oxide surfaces was used to analyze the reaction free energy diagrams of all the oxides in a general way.
Journal ArticleDOI
Sulfur and Nitrogen Dual-Doped Mesoporous Graphene Electrocatalyst for Oxygen Reduction with Synergistically Enhanced Performance†
TL;DR: In this paper, Mesoporous graphene doped with both N and S atoms (N-S-G) was prepared in one step and studied as an electrochemical catalyst for the oxygen reduction reaction (ORR).