Study on leaf-shaped cobalt-based metal-organic frameworks synthesized by solvothermal method as high discharge current density air cathode catalyst for lithium-oxygen batteries

Ionics ◽  
2020 ◽  
Vol 26 (5) ◽  
pp. 2673-2680 ◽  
Author(s):  
Kedi Cai ◽  
Chunxi Dong ◽  
Xiaoshi Lang ◽  
Lan Li ◽  
Qingguo Zhang
Keyword(s):  
Current Density ◽  
Discharge Current ◽  
Solvothermal Method ◽  
Metal Organic Frameworks ◽  
Cathode Catalyst ◽  
Air Cathode ◽  
Discharge Current Density ◽  
High Discharge ◽  
Metal Organic ◽  
Lithium Oxygen Batteries

On-site evolution of ultrafine ZnO nanoparticles from hollow metal–organic frameworks for advanced lithium ion battery anodes

2017 ◽  
Vol 5 (43) ◽  
pp. 22512-22518 ◽  
Author(s):  
Yiqiong Zhang ◽  
Yanbing Lu ◽  
Shi Feng ◽  
Dongdong Liu ◽  
Zhaoling Ma ◽  
...  
Keyword(s):  
Current Density ◽  
Zno Nanoparticles ◽  
High Current Density ◽  
Metal Organic Frameworks ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
High Current ◽  
Metal Organic ◽  
Hollow Metal

With unique hollow frameworks decorated with well-dispersed ultrafine ZnO nanoparticles, the h-ZIF-8@ZnO hybrids exhibit good cycling performance with a reversible capacity of ∼637.9 mA h g−1 at a high current density of 1.0 A g−1 after 500 cycles.

3D hollow cage copper cobalt sulfide derived from metal–organic frameworks for high-performance asymmetric supercapacitors

CrystEngComm ◽  
2021 ◽  
Author(s):  
Jiaqi Wang ◽  
Yiling Quan ◽  
Guoxiang Wang ◽  
Dazhi Wang ◽  
Jie Xiao ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
High Performance ◽  
Solvothermal Method ◽  
Metal Organic Frameworks ◽  
Cobalt Sulfide ◽  
Large Specific Surface Area ◽  
Asymmetric Supercapacitors ◽  
Metal Organic ◽  
One Step

Metal–organic frameworks (MOFs) attracted considerable attention through their large specific surface area and excellent adjustable voids. A one-step solvothermal method is proposed herein to fabricate the 3D hollow cage copper-cobalt...

Co3O4 nanocage derived from metal-organic frameworks: An excellent cathode catalyst for rechargeable Li-O2 battery

Nano Research ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1555-1562 ◽  
Author(s):  
Zhuoliang Jiang ◽  
Hui Sun ◽  
Wenke Shi ◽  
Tianhang Zhou ◽  
Jianyong Hu ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Cathode Catalyst ◽  
Metal Organic

One-Step Construction of Ni/Co-Doped C–N Nanotube Composites as Excellent Cathode Catalysts for Neutral Zinc–Air Battery

NANO ◽  
2019 ◽  
Vol 14 (03) ◽  
pp. 1950028 ◽  
Author(s):  
Liang Yu ◽  
Qingfeng Yi ◽  
Xiaokun Yang ◽  
Xiulin Zhou
Keyword(s):  
Current Density ◽  
Discharge Current ◽  
Open Circuit ◽  
Composite Catalyst ◽  
Carbon Paper ◽  
Neutral Medium ◽  
Discharge Current Density ◽  
Nanotube Composites ◽  
Air Battery ◽  
Co Doped

Development of a neutral Zn–air battery is of much significance due to the high stability of zinc in a neutral electrolyte. Here, Ni/Co-doped C–N nanotube composites (C–N, Ni/C–N, Co/C–N, and Ni–Co/C–N) as efficient oxygen reduction reaction (ORR) electrocatalysts in a neutral medium have been prepared by direct pyrolysis of Ni/Co salt, dicyandiamide (DCD) and glucose. Among the synthesized catalysts, Ni–Co/C–N presents a high ORR current density of 8.5[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]cm[Formula: see text] in a 0.5[Formula: see text]mol[Formula: see text][Formula: see text][Formula: see text]L[Formula: see text] KNO3 solution. The ORR electron transfer number of the catalyst Ni–Co/C–N is 3.8, indicating that O2 is almost completely reduced to H2O. A neutral zinc–air battery utilizing a 0.5[Formula: see text]mol[Formula: see text][Formula: see text][Formula: see text]L[Formula: see text] KNO3 solution has been assembled by using the prepared composite catalyst coated on carbon paper as an air cathode, and Zn plate as an anode. The battery with the cathode catalyst Ni–Co/C–N delivers the open-circuit voltage of 1.13[Formula: see text]V and the maximum power density of 65[Formula: see text]mW[Formula: see text][Formula: see text][Formula: see text]cm[Formula: see text]. The constant discharge current density of 50[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]cm[Formula: see text], 100[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]cm[Formula: see text] and 150[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]cm[Formula: see text] can last 202[Formula: see text]h, 93[Formula: see text]h and 11[Formula: see text]h, respectively. A stable voltage plateau appears at various discharge current densities. The neutral zinc–air battery can be repeatedly discharged after replacing the zinc anode. Results indicate that the synthesized Ni–Co/C–N catalyst is an excellent cathode material applied to a neutral zinc–air battery, showing broad application prospects as a mobile power source.

Enhanced Electrochemical Performance of CoB Amorphous Alloy through the Addition of Lanthanum

2018 ◽  
Vol 914 ◽  
pp. 102-108
Author(s):  
Wei Zhao ◽  
Yi Lin Liao ◽  
Shu Jun Qiu ◽  
Hai Liang Chu ◽  
Yong Jin Zou ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Discharge Capacity ◽  
Current Density ◽  
Discharge Current ◽  
Electrochemical Impedance ◽  
Chemical Reduction ◽  
High Rate ◽  
Discharge Current Density

In order to investigate the effect of lanthanum on the electrochemical properties of CoB amorphous alloy, Co-Lax-B alloys (x = 0, 0.1, 0.5, and 1) were prepared by chemical reduction method. As negative electrodes in alkaline rechargeable batteries, Co-Lax-B alloys exhibit superior electrochemical properties. For Co-La0.1-B alloy, at the discharge current density of 100 mA/g, the initial discharge capacity is 830.6 mAh/g and the discharge capacity has remained around 317.3 mAh/g even after 100 cycles. Moreover, the high-rate discharge ability (HRD) of Co-La0.1-B alloy electrode at the discharge current density of 300 mA/g, 600 mA/g, and 900 mA/g is 98.16%, 95.17%, and 91.86%, respectively. The anodic polarization (AP) and the electrochemical impedance spectra (EIS) measurements indicate that the kinetics of electrochemical performance of the alloys is remarkably improved with the addition of lanthanum.

Ir-Doped Ni-based metal–organic framework ultrathin nanosheets on Ni foam for enhanced urea electro-oxidation

2020 ◽  
Vol 56 (14) ◽  
pp. 2151-2154 ◽  
Author(s):  
You Xu ◽  
Xingjie Chai ◽  
Tianlun Ren ◽  
Shanshan Yu ◽  
Hongjie Yu ◽  
...  
Keyword(s):  
Solvothermal Method ◽  
Nickel Foam ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Ni Foam ◽  
Ultrathin Nanosheets ◽  
Metal Organic ◽  
Electro Oxidation ◽  
Organic Framework

NiIr-based metal–organic frameworks grown on a nickel foam substrate (NiIr-MOF/NF) are synthesized by a solvothermal method and directly used for urea electro-oxidation.

scholarly journals Adsorptive, kinetics and regeneration studies of fluoride removal from water using zirconium-based metal organic frameworks

RSC Advances ◽  
2020 ◽  
Vol 10 (32) ◽  
pp. 18740-18752 ◽  
Author(s):  
Tong Ling Tan ◽  
Poovarasi A/P Krusnamurthy ◽  
Hideki Nakajima ◽  
Suraya Abdul Rashid
Keyword(s):  
Lattice Spacing ◽  
Solvothermal Method ◽  
Metal Organic Frameworks ◽  
Fluoride Removal ◽  
Metal Organic ◽  
Facile Solvothermal Method

A facile solvothermal method is used to prepare octahedral MOF-801 with a lattice spacing of 0.304 nm representative of ZrO2 (011) planes for water defluorination.

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