Performance improvement of air electrode for Li/air batteries by hydrophobicity adjustment

2015 ◽  
Vol 3 (22) ◽  
pp. 11874-11879 ◽  
Author(s):  
Mei Chen ◽  
Xiaoliang Jiang ◽  
Hui Yang ◽  
Pei Kang Shen
Keyword(s):  
Performance Improvement ◽  
Current Collector ◽  
Carbon Paper ◽  
Electrode Structure ◽  
Air Electrode

In this paper, a particular air electrode structure for Li/air batteries was designed and evaluated by using carbon paper as the support for the catalyst and the current collector of the air electrode.

Direct growth of flower-like 3D MnO2 ultrathin nanosheets on carbon paper as efficient cathode catalyst for rechargeable Li–O2 batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (89) ◽  
pp. 72495-72499 ◽  
Author(s):  
Hong-Qiang Wang ◽  
Jing Chen ◽  
Si-Jiang Hu ◽  
Xiao-Hui Zhang ◽  
Xiao-Ping Fan ◽  
...  
Keyword(s):  
Carbon Paper ◽  
Cathode Catalyst ◽  
Working Mechanism ◽  
Air Electrode ◽  
Ultrathin Nanosheets ◽  
Direct Growth

Structure and working mechanism of the MnO2/CP air electrode.

scholarly journals Ordered SnO2@C Flake Array as Catalyst Support for Improved Electrocatalytic Activity and Cathode Durability in PEMFCs

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2412
Author(s):  
Zhaoyi Yang ◽  
Ming Chen ◽  
Baizeng Fang ◽  
Gaoyang Liu
Keyword(s):  
Electrochemical Impedance ◽  
Proton Exchange ◽  
Pt Catalyst ◽  
Carbon Paper ◽  
Potential Range ◽  
Active Surface Area ◽  
Reduction Peak ◽  
Electrode Structure ◽  
Positive Interaction ◽  
Supported Pt Catalyst

Pt-SnO2@C-ordered flake array was developed on carbon paper (CP) as an integrated cathode for proton exchange membrane fuel cell through a facile hydrothermal method. In the integrated cathode, Pt nanoparticles were deposited uniformly with a small particle size on the SnO2@C/CP support. Electrochemical impedance spectroscopy analysis revealed lower impedance in a potential range of 0.3–0.5 V for the ordered electrode structure. An electrochemically active surface area and oxygen reduction peak potential determined by cyclic voltammetry measurement verified the synergistic effect between Pt and SnO2, which enhanced the electrochemical catalytic activity. Besides, compared with the commercial carbon-supported Pt catalyst, the as-developed SnO2@C/CP-supported Pt catalyst demonstrated better stability, most likely due to the positive interaction between SnO2 and the carbon coating layer.

Development of Areal Capacity of Si-O-C Composites as Anode for Lithium Secondary Batteries Using 3D-Structured Carbon Paper as a Current Collector

2017 ◽  
Vol 164 (2) ◽  
pp. A355-A359 ◽  
Author(s):  
Seongki Ahn ◽  
Moongook Jeong ◽  
Koki Miyamoto ◽  
Tokihiko Yokoshima ◽  
Hiroki Nara ◽  
...  
Keyword(s):  
Current Collector ◽  
Carbon Paper ◽  
Lithium Secondary Batteries ◽  
A Current ◽  
Areal Capacity

Freely-Suspended, Single Chamber Glucose Oxidase-Laccase Enzymatic Fuel Cell

2012 ◽  
Vol 512-515 ◽  
pp. 1499-1502
Author(s):  
Nurrisa Asrul ◽  
Raihan Othman ◽  
Muhd Zu Azhan Yahya ◽  
Hamzah Mohd Salleh ◽  
Faridah Yusof ◽  
...  
Keyword(s):  
System Design ◽  
Glucose Oxidase ◽  
Enzyme Reaction ◽  
Current Collector ◽  
Open Circuit ◽  
Citrate Buffer ◽  
Air Electrode ◽  
Single Chamber ◽  
Enzymatic Fuel Cell ◽  
Freely Suspended

We investigate glucose oxidase-laccase EFC employing simplified system design – freely suspended enzymes in a membraneless, single chamber cell. The highly specific enzyme reaction mechanisms permit such system design. The EFC comprises nickel mesh as the oxidative current collector and a carbon-based air electrode as the reductive current collector, enclosed in acrylic casing of 3 ml volumetric capacity. The air electrode also serves as the ambient oxygen diffusion site to continuously feed oxygen into the system. The anolyte consists of glucose oxidase enzyme (10 U), glucose substrate (200 mM) and FAD co-enzyme (3.8 mM), while the catholyte consists of laccase enzyme (10 U) and syringaldazine substrate (216 µM). The cell employing citrate buffer electrolyte of pH 5 exhibits the best characteristics i.e. an open circuit voltage (OCV) around 960 mV and able to sustain continuous discharge current of 30µA for about 31.75 hours. The cell possesses volumetric power density of 286 W/cm3which is considered comparable to biocatalytic energy systems employing much more complicated design.

The Effect of Different Flow Patterns on Anode Fluid Behaviors of Micro Direct Methanol Fuel Cells

2009 ◽  
Vol 60-61 ◽  
pp. 260-264
Author(s):  
Bo Zhang ◽  
Yu Feng Zhang ◽  
Xiao Wei Liu ◽  
Peng Zhang
Keyword(s):  
Flow Field ◽  
Gas Flow ◽  
Direct Methanol Fuel Cells ◽  
Current Collector ◽  
Flow Patterns ◽  
Carbon Paper ◽  
Carbon Cloth ◽  
Serpentine Flow Field ◽  
Direct Methanol ◽  
Visualization Technology

Based on the visualization technology, we investigated experimentally the effect of different flow patterns on anode fluid behaviors of the μDMFC (Micro Direct Methanol Fuel Cell) with a transparent material under the same condition. Stainless steel mesh was utilized as the current collector which was distinct from the carbon cloth or carbon paper. Four dissimilar flow patterns were developed and tested. The observation of the effect of different flow patterns revealed that movements of dilute methanol solutions and CO2 gas bubbles in the dot and parallel flow fields represented more difficult, which could result in a decline of the μDMFC performance. The study also showed that a channel blocking in the single-serpentine flow field would be extremely terrible which could lead to a fuels leaking of the μDMFC, meanwhile the liquid-gas flow was more fluent and stable in a double-serpentine flow field. Therefore, due to its advantages, a double-serpentine flow pattern is more suitable for the μDMFC application compared with the other flow patterns.

Structured Carbon Nanotube/Silicon Nanoparticle Anode Architecture for High Performance Lithium-Ion Batteries

2014 ◽  
Vol 1643 ◽  
Author(s):  
Sharon Kotz ◽  
Ankita Shah ◽  
Sivasubramanian Somu ◽  
KM Abraham ◽  
Sanjeev Mukerjee ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Standard Procedure ◽  
Active Material ◽  
Lithium Ion ◽  
Current Collector ◽  
Directed Assembly ◽  
Electrode Structure ◽  
Silicon Nanoparticle

ABSTRACTSilicon is emerging as a very attractive anode material for lithium ion batteries due to its low discharge potential, natural abundance, and high theoretical capacity of 4200 mAh/g, more than ten times that of graphite (372 mAh/g). This high charge capacity is the result of silicon’s ability to incorporate 4.4 lithium atoms per silicon atom; however, the incorporation of lithium also leads to a 300-400% volume expansion during charging, which can cause pulverization of the material and loss of access to the silicon. The architecture of the anode must therefore be able to adapt to this volume increase. Here we present a layered carbon nanotube and silicon nanoparticle electrode structure, fabricated using directed assembly techniques. The porous carbon nanotube layers maintain electrical connectivity through the active material and increase the surface area of the current collector. Using this architecture, we obtain an initial capacity in excess of 4000 mAh/g, as well as increased power and energy density as compared to anodes fabricated using the standard procedure of slurry casting.

scholarly journals Intercalated nanosized MO2 (M: Sn, Ce) layers between CNTs and Pt or PtSn nanoparticles catalysts

2007 ◽  
Vol 3 (2) ◽  
pp. 174-182
Author(s):  
Mohamed Mohamedi ◽  
Amel Tabet-Aoul
Keyword(s):  
Nanostructured Catalysts ◽  
Current Collector ◽  
Electrical Energy ◽  
Oxidation Potential ◽  
Carbon Paper ◽  
Direct Ethanol Fuel Cells ◽  
Promoting Effect ◽  
Slow Potential ◽  
High Performing ◽  
Energy Conversion Systems

Direct ethanol fuel cells (DEFCs) is receiving enormous attention as alternative electrical energy conversion systems. This paper gives an outline on some recent advances achieved in our laboratory regarding the development of high performing anode for ethanol oxidation. We developed multi-components binderless hierarchically organized layer onto layer nanostructured catalysts comprising a carbon paper (CP, current collector)/carbon nanotubes (CNTs, conductivity enhancer)/catalyst promoter (MOx, M: Sn; Ce)/Pt-based (electrocatalyst). The main focus was how to lower the onset oxidation potential (OOP) of ethanol at Pt75Sn25 catalyst. Towards that aim, metal oxides such as CeO2 and SnO2 were sought as catalyst promoters. It has been discovered that intercalating a nanostructured layer of SnO2 between CNTs and Pt75Sn25 considerably lowered the OOP of ethanol and also increased the specific mass activity (SMA) at low potentials. Indeed, the OOP at the CP/CNT/SnO2/Pt75Sn25 was 210 mV and 117 mV negative relative to that delivered by CP/CNT/Pt and CP/CNT/Pt75Sn25, respectively confirming by that the promoting effect of SnO2 of the oxidation of CO at low potentials. The SMA determined at slow potential scan rate of 5 mV/s at 0.4 V vs. Ag/AgCl revealed that CP/CNT/SnO2/Pt75Sn25 delivered an SMA of 1.2 times higher than that of the CP/CNT/Pt75Sn25 catalyst and 1.5 times greater than the one exhibited by the CP/CNT/CeO2/Pt75Sn25 catalyst.

scholarly journals Simulation for All-Solid State Batteries with Multi-Element Network Model

2021 ◽  
Vol 333 ◽  
pp. 17002
Author(s):  
Ryusei Hirate ◽  
Hiroki Mashioka ◽  
Shinichiro Yano ◽  
Yoshifumi Tsuge ◽  
Gen Inoue
Keyword(s):  
Lithium Ion Batteries ◽  
Performance Improvement ◽  
Layer Structure ◽  
Porous Electrode ◽  
Phase Interface ◽  
Lithium Ion ◽  
Interface Model ◽  
Electrode Structure ◽  
Electrode Layer ◽  
Solid State Batteries

In order to increase energy density and enhance safety, all-solid-sate lithium-ion batteries have been developed as a storage battery for electric vehicle (EV). Further performance improvement of all-solid-sate lithium-ion batteries requires optimization of the electrode structure. In this paper, we constructed a phase interface model focusing on the microstructure of the porous electrode, and examined the reaction of the electrode layer structure.

Sign in / Sign up

Export Citation Format

Share Document