Boosting the bifunctional electrocatalytic oxygen activities of CoOxnanoarrays with a porous N-doped carbon coating and their application in Zn–air batteries

2017 ◽  
Vol 5 (34) ◽  
pp. 17804-17810 ◽  
Author(s):  
Yongchao Hao ◽  
Yuqi Xu ◽  
Nana Han ◽  
Junfeng Liu ◽  
Xiaoming Sun
Keyword(s):  
Cobalt Oxide ◽  
Porous Carbon ◽  
Carbon Coating ◽  
High Efficiency ◽  
Catalytic Performance ◽  
Good Stability ◽  
Carbon Coated ◽  
Air Battery

A N-doped porous carbon coated cobalt oxide nanoarray electrode was prepared with excellent bifunctional oxygen catalytic performance, and demonstrated good stability and high efficiency in a Zn–air battery.

Engineering hollow cobalt oxide nanospheres with porous carbon coating for stable lithium storage

2021 ◽  
pp. 115531
Author(s):  
Doufeng Wu ◽  
Jian Song ◽  
Yelin Ji ◽  
Qinghua Tian ◽  
Zhuyin Sui ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Porous Carbon ◽  
Carbon Coating ◽  
Lithium Storage

Nickel cobalt oxide/carbon nanotubes hybrid as a high-performance electrocatalyst for metal/air battery

Nanoscale ◽  
2014 ◽  
Vol 6 (17) ◽  
pp. 10235-10242 ◽  
Author(s):  
Hui Zhang ◽  
Hang Qiao ◽  
Haiyan Wang ◽  
Nan Zhou ◽  
Jiajie Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Synergistic Effect ◽  
Cobalt Oxide ◽  
High Performance ◽  
Catalytic Performance ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide ◽  
Air Battery

The NiCo2O4/CNTs hybrid was firstly proposed as a high-performance catalyst for ORR process. Because of the synergistic effect, the hybrid exhibited significant improvement of catalytic performance in comparison with the NiCo2O4 or CNTs alone, even outperforming Pt/C.

scholarly journals Formation of Nanocrystalline Cobalt Oxide-Decorated Graphene for Secondary Lithium-Air Battery and Its Catalytic Performance in Concentrated Alkaline Solutions

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1122
Author(s):  
Si-Han Peng ◽  
Hsin-Chun Lu ◽  
Shingjiang Jessie Lue
Keyword(s):  
Cobalt Oxide ◽  
Hydrothermal Reaction ◽  
Catalytic Performance ◽  
Discharge Voltage ◽  
Alkaline Solutions ◽  
Carbon Cloth ◽  
X Ray Diffraction ◽  
Charge Voltage ◽  
Cobalt Solution ◽  
Air Battery

A potent cathode catalyst of octahedral cobalt oxide (Co3O4) was synthesized onto graphene (GR) nanosheets via a two-step preparation method. The precursor cobalt solution reacted with GR during the initial hydrolysis step to form intermediates. A subsequent hydrothermal reaction promoted Co3O4 crystallinity with a crystalline size of 73 nm, resulting in octahedral particles of 100–300 nm in size. Scanning electron microscopy, Raman spectroscopy, and X-ray diffraction analysis confirmed the successful formation of the Co3O4/GR composite. This catalyst composite was sprayed onto a carbon cloth to form a cathode for the hybrid electrolyte lithium-air battery (HELAB). This catalyst demonstrated improved oxygen reduction and oxygen evolution capabilities. The HELAB containing this catalyst showed a higher discharge voltage and stable charge voltage, resulting in a 34% reduction in overall over-potential compared to that without the Co3O4/GR composite. The use of saturated LiOH in 11.6 M LiCl aqueous electrolyte at the cathode further reduced the over-potential by 0.5 V. It is proposed that the suppressed dissociation of LiOH expedites the charging reaction from un-dissociated LiOH. This Co3O4/GR composite is a promising bi-functional catalyst, suitable as a cathode material for a HELAB operating in high relative humidity and highly alkaline environment.

Ferrocene-Crosslinked Polypyrrole Hydrogel Derived Fe-N-doped Hierarchical Porous Carbon as Efficient Electrocatalysts for pH Universal ORR and Zn-air battery

2021 ◽  
Author(s):  
Peng Sun ◽  
Teng Zhang ◽  
Hantian Luo ◽  
Jinli Dou ◽  
Weiwei Bian ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Efficiency ◽  
Low Cost ◽  
Cost Effective ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Air Battery ◽  
Carbon Based

Herein, a cost-effective and high-efficiency Fe-N-doped carbon-based catalysts, denoted as PF-800, was facilely prepared via direct carbonization of a polypyrrole hydrogel (PF) using the low cost and commercial massive produced...

Porous carbon-coated NaTi2(PO4)3 with superior rate and low-temperature properties

2018 ◽  
Vol 6 (5) ◽  
pp. 2365-2370 ◽  
Author(s):  
Qiao Hu ◽  
Mufan Yu ◽  
Jiaying Liao ◽  
Zhaoyin Wen ◽  
Chunhua Chen
Keyword(s):  
Low Temperature ◽  
Porous Carbon ◽  
Carbon Coating ◽  
Hydrothermal Process ◽  
Carbon Coated

Nanosized porous carbon-coated NaTi2(PO4)3 (NTP) particles with superior rate and low-temperature properties are synthesized by a hydrothermal process combined with different carbon coating steps.

Ferrocene-based Porous Organic Polymer Derived N-Doped Porous Carbon/Fe3C Nanocrystal Hybrids towards High-efficiency ORR for Zn-air Battery

2021 ◽  
Author(s):  
Xiaoming Liang ◽  
Xia Liu ◽  
Han Lou ◽  
Huiru Wang ◽  
Hui Li ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Porous Carbon ◽  
High Efficiency ◽  
Low Cost ◽  
Organic Polymer ◽  
Energy Devices ◽  
Oxygen Reduction Catalysts ◽  
Air Battery ◽  
Reduction Catalysts ◽  
Nonprecious Metal

Exploring low-cost and high-powered nonprecious metal oxygen reduction catalysts (ORR) in fuel cells and metal-air batteries is critical for the commercialization of these sustainable energy devices. In this article, novel...

Co2P nanoparticle/multi-doped porous carbon nanosheets for the oxygen evolution reaction

2021 ◽  
Author(s):  
Xinxin Sang ◽  
Hengbo Wu ◽  
Nan Zang ◽  
Huilian Che ◽  
Dongyin Liu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Porous Carbon ◽  
Oxygen Evolution Reaction ◽  
Catalytic Performance ◽  
Carbon Nanosheets

Co2P hybridized with multi-doped carbon nanoleaves is obtained via direct carbonization of ZIF-L/PEI/PA and show good electro-catalytic performance in OER.

Copper–cobalt oxide catalysts supported on MgF or AlO—their structure and catalytic performance

2006 ◽  
Vol 298 ◽  
pp. 225-231 ◽  
Author(s):  
M WOJCIECHOWSKA ◽  
M ZIELINSKI ◽  
A MALCZEWSKA ◽  
W PRZYSTAJKO ◽  
M PIETROWSKI
Keyword(s):  
Cobalt Oxide ◽  
Catalytic Performance ◽  
Oxide Catalysts
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