Controllable synthesis and in situ TEM study of lithiation mechanism of high performance NaV3O8 cathodes

2015 ◽  
Vol 3 (6) ◽  
pp. 3044-3050 ◽  
Author(s):  
Xinyong Tao ◽  
Kuan Wang ◽  
Hongtao Wang ◽  
Qianqian Li ◽  
Yang Xia ◽  
...  
Keyword(s):  
Cathode Materials ◽  
High Performance ◽  
In Situ Tem ◽  
Controllable Synthesis ◽  
Tem Characterization ◽  
One Step

We report a controllable one-step calcination synthesis of NaV3O8 nanobelts, nanorods and microrods. In situ TEM characterization confirms the basic lithiation mechanism of NaV3O8 cathode materials.

scholarly journals Computational and experimental investigations of one-step conversion of poly(carbonate)s into value-added poly(aryl ether sulfone)s

2016 ◽  
Vol 113 (28) ◽  
pp. 7722-7726 ◽  
Author(s):  
Gavin O. Jones ◽  
Alexander Yuen ◽  
Rudy J. Wojtecki ◽  
James L. Hedrick ◽  
Jeannette M. García
Keyword(s):  
High Performance ◽  
Density Functional ◽  
Value Added ◽  
Single Step ◽  
Nucleophilic Attack ◽  
Experimental Investigations ◽  
Aryl Ether ◽  
One Step ◽  
Poly Carbonate

It is estimated that ∼2.7 million tons poly(carbonate)s (PCs) are produced annually worldwide. In 2008, retailers pulled products from store shelves after reports of bisphenol A (BPA) leaching from baby bottles, reusable drink bottles, and other retail products. Since PCs are not typically recycled, a need for the repurposing of the PC waste has arisen. We report the one-step synthesis of poly(aryl ether sulfone)s (PSUs) from the depolymerization of PCs and in situ polycondensation with bis(aryl fluorides) in the presence of carbonate salts. PSUs are high-performance engineering thermoplastics that are commonly used for reverse osmosis and water purification membranes, medical equipment, as well as high temperature applications. PSUs generated through this cascade approach were isolated in high purity and yield with the expected thermal properties and represent a procedure for direct conversion of one class of polymer to another in a single step. Computational investigations performed with density functional theory predict that the carbonate salt plays two important catalytic roles in this reaction: it decomposes the PCs by nucleophilic attack, and in the subsequent polyether formation process, it promotes the reaction of phenolate dimers formed in situ with the aryl fluorides present. We envision repurposing poly(BPA carbonate) for the production of value-added polymers.

In Situ One-Step Synthesis of Hierarchical Nitrogen-Doped Porous Carbon for High-Performance Supercapacitors

2014 ◽  
Vol 6 (10) ◽  
pp. 7214-7222 ◽  
Author(s):  
Ju-Won Jeon ◽  
Ronish Sharma ◽  
Praveen Meduri ◽  
Bruce W. Arey ◽  
Herbert T. Schaef ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Nitrogen Doped ◽  
One Step

Development of an In-Situ Nanoindentation Specimen Holder for the High Voltage Electron Microscope

1997 ◽  
Vol 3 (S2) ◽  
pp. 593-594 ◽  
Author(s):  
M.A. Wall ◽  
U. Dahmen
Keyword(s):  
In Situ Tem ◽  
Post Mortem ◽  
Delamination Wear ◽  
Voltage Electron ◽  
Specimen Holder ◽  
Tem Characterization ◽  
Natural Sampling ◽  
Sampling Volume ◽  
Considerable Work

Progress on the development of an in-situ nanoindentation specimen holder for the Kratos 1.5MeV HVEM located at the National Center for Electron Microscopy, Berkeley, CA, USA, is reported. There is currently considerable work being reported on the mechanical properties (i.e., hardness, delamination, wear, etc.) of single and multicomponent thin films, nanoclusters and fibers by techniques such as nanoindenting, ref. [1] are recent examples. However, with all of these tests there has not been direct, unambiguous observation of the response or evolution of the microstructure. With many of these reports, there has been little “post-mortem” TEM characterization and there has been no real attempts to simulate these dynamically in the TEM. For the case of nano-testing of the materials the interaction volumes are often on the scale of the natural sampling volume of the HVEM. It seems natural that post-mortem and in-situ TEM characterization techniques be applied.

One-Step In Situ Growth of Iron-Nickel Sulfide Nanosheets on FeNi Alloy Foils: High-Performance and Self-Supported Electrodes for Water Oxidation

Small ◽  
2017 ◽  
Vol 13 (18) ◽  
pp. 1604161 ◽  
Author(s):  
Cheng-Zong Yuan ◽  
Zhong-Ti Sun ◽  
Yi-Fan Jiang ◽  
Zheng-Kun Yang ◽  
Nan Jiang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
High Performance ◽  
Nickel Sulfide ◽  
In Situ Growth ◽  
Iron Nickel ◽  
One Step ◽  
Feni Alloy

Hierarchical hollow microspheres Na3V2(PO4)2F3C@rGO as high-performance cathode materials for sodium ion batteries

2020 ◽  
Vol 44 (30) ◽  
pp. 12985-12992
Author(s):  
Peng Du ◽  
Kan Mi ◽  
Fangdong Hu ◽  
Xiaolei Jiang ◽  
Debao Wang ◽  
...  
Keyword(s):  
Cathode Material ◽  
Hydrothermal Method ◽  
Cathode Materials ◽  
High Performance ◽  
Hollow Microspheres ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
One Step

Nanosheet-assembled Na3V2(PO4)2F3 microspheres were synthesized by a one-step polyol-assisted hydrothermal method and combined with graphene as the cathode material for SIBs.

scholarly journals In Situ TEM Characterization of Electrochemical Systems

2011 ◽  
Vol 17 (S2) ◽  
pp. 1572-1573 ◽  
Author(s):  
K Noh ◽  
L Sun ◽  
X Chen ◽  
J Wen ◽  
S Dillon
Keyword(s):  
In Situ Tem ◽  
Electrochemical Systems ◽  
Tem Characterization

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

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