نتایج جستجو برای: electrode engineering

تعداد نتایج: 325461  

Journal: :Physical chemistry chemical physics : PCCP 2016
Alexander J Pearse Eleanor Gillette Sang Bok Lee Gary W Rubloff

Morphologically complex electrochemical systems such as composite or nanostructured lithium ion battery electrodes exhibit spatially inhomogeneous internal current distributions, particularly when driven at high total currents, due to resistances in the electrodes and electrolyte, distributions of diffusion path lengths, and nonlinear current-voltage characteristics. Measuring and controlling t...

2005
U. van Rienen J. Flehr U. Schreiber S. Schulze U. Gimsa W. Baumann D. G. Weiss J. Gimsa R. Benecke H.-W. Pau

Slowly varying electromagnetic fields play a key role in various applications in bio-systems and medical engineering. Examples are the electric activity of neurons on neurochips used as biosensors, the stimulating electric fields of implanted electrodes used for deep brain stimulation in patients with Morbus Parkinson and the stimulation of the auditory nerves in deaf patients, respectively. In...

Journal: :ACS nano 2015
Tu Hong Bhim Chamlagain Shuren Hu Sharon M Weiss Zhixian Zhou Ya-Qiong Xu

We investigate the wavelength- and polarization-dependence of photocurrent signals generated at few-layer MoS2-metal junctions through spatially resolved photocurrent measurements. When incident photon energy is above the direct bandgap of few-layer MoS2, the maximum photocurrent response occurs for the light polarization direction parallel to the metal electrode edge, which can be attributed t...

2014
Xian-Wei Liu Jie-Jie Chen Yu-Xi Huang Xue-Fei Sun Guo-Ping Sheng Dao-Bo Li Lu Xiong Yuan-Yuan Zhang Feng Zhao Han-Qing Yu

Bioelectrochemical systems (BESs) share the principle of the microbially catalyzed anodic substrate oxidation. Creating an electrode interface to promote extracellular electron transfer from microbes to electrode and understanding such mechanisms are crucial for engineering BESs. In this study, significantly promoted electron transfer and a 10-times increase in current generation in a BES were ...

2013
Xueling ZHU Juan ZHANG Zeng PING Jia LIU

Due to limitations of 0.618 pole method, the triangle method and the champ ground resistance tester method on grounding resistance measurement of transmission lines and towers under conditions of complex landscape in a mountainous area, it adopts a generalized three-electrode grounding resistance measurement method which arranges electrode flexibly in the grounding resistance measurement of tra...

2015
Yuta Ojima Shogo Miyata

Cell sorting is an important technology that is widely used for medical diagnosis in hospitals and cell engineering research. Among cell sorting technology, dielectrophoresis (DEP) is one of the most promising approaches for manipulating and separating biological particles because this phenomena requires no labeling procedure with a fluorescent dye or magnetic beads. In this study, we developed...

Journal: :Nano letters 2015
Young-Sang Yu Chunjoong Kim David A Shapiro Maryam Farmand Danna Qian Tolek Tyliszczak A L David Kilcoyne Rich Celestre Stefano Marchesini John Joseph Peter Denes Tony Warwick Fiona C Strobridge Clare P Grey Howard Padmore Ying Shirley Meng Robert Kostecki Jordi Cabana

The performance of battery electrode materials is strongly affected by inefficiencies in utilization kinetics and cycle life as well as size effects. Observations of phase transformations in these materials with high chemical and spatial resolution can elucidate the relationship between chemical processes and mechanical degradation. Soft X-ray ptychographic microscopy combined with X-ray absorp...

2015
Young-Sang Yu Chunjoong Kim David A. Shapiro Maryam Farmand Danna Qian Tolek Tyliszczak A. L. David Kilcoyne Rich Celestre Stefano Marchesini John Joseph Peter Denes Tony Warwick Fiona C. Strobridge Clare P. Grey Howard Padmore Ying Shirley Meng Robert Kostecki Jordi Cabana

The performance of battery electrode materials is strongly affected by inefficiencies in utilization kinetics and cycle life as well as size effects. Observations of phase transformations in these materials with high chemical and spatial resolution can elucidate the relationship between chemical processes and mechanical degradation. Soft X-ray ptychographic microscopy combined with X-ray absorp...

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