Scalable Holey Graphene Synthesis and Dense Electrode Fabrication toward High-Performance Ultracapacitors

ACS Nano ◽  
2014 ◽  
Vol 8 (8) ◽  
pp. 8255-8265 ◽  
Author(s):  
Xiaogang Han ◽  
Michael R. Funk ◽  
Fei Shen ◽  
Yu-Chen Chen ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
High Performance ◽  
Graphene Synthesis ◽  
Electrode Fabrication

scholarly journals High performance LiMnFePO4/Li4Ti5O12 full cells by functionalized polymeric additives

2021 ◽  
Author(s):  
Jean-Christophe Daigle ◽  
Sylviane Rochon ◽  
Yuichiro Asakawa ◽  
Benoît Fleutot ◽  
Charlotte Mallet ◽  
...  
Keyword(s):  
High Voltage ◽  
High Performance ◽  
Functional Polymers ◽  
Fast Charge ◽  
Polymeric Additives ◽  
Electrode Fabrication ◽  
Charge Discharge

Herein, we report a novel class of additives based on functional polymers for electrode fabrication applied in the first fast charge–discharge and high-voltage LiMnFePO4/Li4Ti5O12 batteries operating at 3.0 V.

scholarly journals Low cost and green preparation process for α-Fe2O3@gum arabic electrode for high performance sodium ion batteries

2017 ◽  
Vol 5 (5) ◽  
pp. 2102-2109 ◽  
Author(s):  
Li Xu ◽  
Hansinee Sitinamaluwa ◽  
Henan Li ◽  
Jingxia Qiu ◽  
Yazhou Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Gum Arabic ◽  
Fabrication Process ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Preparation Process ◽  
Water Based ◽  
Electrode Fabrication ◽  
First Time

A high performance α-Fe2O3 electrode is prepared via a green gum arabic-water based electrode fabrication process for SIBs for the first time.

Electrophoretic MEA Fabrication for High Performance DMFC

2009 ◽  
Vol 412 ◽  
pp. 249-252 ◽  
Author(s):  
Hirokazu Munakata ◽  
Suguru Omori ◽  
Kiyoshi Kanamura
Keyword(s):  
Direct Methanol Fuel Cell ◽  
High Performance ◽  
Composite Particles ◽  
Hot Press ◽  
Direct Methanol ◽  
Press Method ◽  
Electrode Composition ◽  
Electrode Fabrication ◽  
Mechanical Pressing ◽  
Methanol Fuel Cell

Anode for direct methanol fuel cell (DMFC) was fabricated on Nafion 117 membrane by electrophoretic deposition (EPD) method. An ethanol suspension containing Pt-Ru/C and Nafion ionomer was utilized, in which Pt-Ru/C and Nafion ionomer formed composite particles. The prepared electrode was tightly attached to the membrane without mechanical pressing and heat treatment. The electrode composition, i.e., the ratio between Pt-Ru/C and ionomer in the electrode, was controllable by Nafion content in the suspension, and strongly influenced on the DMFC performance. Accordingly, the anode with ionomer fraction of 26% exhibited the highest performance, which was more than twice as high as the performance attained in a standard electrode fabrication (hot press method).

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Prospects for convergent beam electron diffraction with a 200kV cold field-emission transmission electron microscope

1991 ◽  
Vol 49 ◽  
pp. 466-467
Author(s):  
J W Steeds ◽  
R Vincent
Keyword(s):  
Field Emission ◽  
High Performance ◽  
Small Diameter ◽  
Convergent Beam Electron Diffraction ◽  
Zone Axis ◽  
Medium Voltage ◽  
Transmission Electron ◽  
Good Crystallinity ◽  
Special Modification ◽  
Convergent Beam

We review the analytical powers which will become more widely available as medium voltage (200-300kV) TEMs with facilities for CBED on a nanometre scale come onto the market. Of course, high performance cold field emission STEMs have now been in operation for about twenty years, but it is only in relatively few laboratories that special modification has permitted the performance of CBED experiments. Most notable amongst these pioneering projects is the work in Arizona by Cowley and Spence and, more recently, that in Cambridge by Rodenburg and McMullan.There are a large number of potential advantages of a high intensity, small diameter, focussed probe. We discuss first the advantages for probes larger than the projected unit cell of the crystal under investigation. In this situation we are able to perform CBED on local regions of good crystallinity. Zone axis patterns often contain information which is very sensitive to thickness changes as small as 5nm. In conventional CBED, with a lOnm source, it is very likely that the information will be degraded by thickness averaging within the illuminated area.

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