ECS Electrochemistry Letters最新文献

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Effects of Electron-Beam Pretreatment on Anodically Grown TiO2 Nanotubes 电子束预处理对阳极生长TiO2纳米管的影响

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0061504EEL

Yong-Wook Choi, M. Seong, Hyeonseok Yoo, Dong-Wha Park, S. Oh, J. Kwak, Y. Jung, Jinsub Choi

引用次数: 1

One-Step Electrochemical Deposition of Reduced Graphene Oxide-Bismuth Nanocomposites for Determination of Lead 一步电化学沉积还原氧化石墨烯-铋纳米复合材料测定铅

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0021509EEL

Xueping Hu, Dawei Pan, Mingyue Lin, Haitao Han, Fei Li

The novel reduced graphene oxide-bismuth (RGO-Bi) nanocomposites were successfully synthesized through one-step electrochemical reduced deposition and used to modify disposable screen-printed electrode (SPE) for determination of Pb(II). By electrochemical deposition, a large number of Bi particles were distributed on RGO. Combined the unique structure and electronic properties of RGO with the ability of Bi to form alloys with other metals, the RGO-Bi/SPE has shown wide linear range and low detection limit for determination of Pb(II). Additionally, the RGO-Bi/SPE was successfully applied to the rapid determination of Pb(II) in real coastal sediment pore waters. (C) 2015 The Electrochemical Society. All rights reserved.

通过一步电化学还原沉积法制备了新型氧化石墨烯-铋(RGO-Bi)纳米复合材料，并将其用于修饰一次性丝网印刷电极(SPE)中铅(II)的测定。通过电化学沉积，在还原氧化石墨烯上分布了大量的Bi颗粒。结合RGO独特的结构和电子性质以及Bi与其他金属形成合金的能力，RGO-Bi/SPE测定Pb(II)具有宽的线性范围和低的检出限。此外，RGO-Bi/SPE成功应用于实际海岸沉积物孔隙水中Pb(II)的快速测定。(C) 2015中国电化学会。版权所有。

引用次数: 11

Evaluation of an Alkaline Electrolyte System for Al-Air Battery 铝-空气电池碱性电解液体系的评价

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0031512EEL

Zegao Sun, Huimin Lu, Qingshui Hong, L. Fan, Chunbo Chen, Jing Leng

引用次数: 26

High-Rate Capabilities of Ferroelectric BaTiO3–LiCoO2 Composites with Optimized BaTiO3 Loading for Li-Ion Batteries 优化锂离子电池BaTiO3负载的铁电BaTiO3 - licoo2复合材料的高倍率性能

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0041512EEL

T. Teranishi, Y. Yoshikawa, R. Sakuma, Hirokazu Okamura, H. Hashimoto, H. Hayashi, T. Fujii, A. Kishimoto, Y. Takeda

引用次数: 15

Analytical Relationship between Anion Formation and Carrier-Trap Statistics in Chalcogenide Glass Films 硫系玻璃薄膜阴离子形成与载流子陷阱统计的分析关系

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0061507EEL

Mehdi Saremi, H. Barnaby, A. Edwards, M. Kozicki

An analytical mapping for electron trapping in chalcogenide glass (ChG)films is derived which equates anion formation (dissolution) reactions and carrier-trap statistics. Glass binaries composed of chalcogen atoms contain high densities of negative charge that result from chemical reactions involving free electrons. This process of anion formation and dissolution between an electron and a neutral species is shown to be equivalent to standard models for carrier statistics. The derived equivalence reduces chemical reaction equations into statistics calculations performed through conventional semiconductor device simulation. The proposed mapping is shown to be valid for both equilibrium and steady state photogeneration conditions. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any

推导了硫系玻璃(ChG)薄膜中电子捕获的解析映射，该映射将阴离子形成(溶解)反应与载流子捕获统计等同起来。由硫原子组成的玻璃双星含有高密度的负电荷，这是由涉及自由电子的化学反应产生的。电子和中性物质之间阴离子形成和溶解的过程与载流子统计的标准模型等效。导出的等效性将化学反应方程简化为通过传统半导体器件模拟执行的统计计算。所提出的映射被证明是有效的平衡和稳态光产生条件。©作者2015。由ECS出版。这是一篇在知识共享署名4.0许可(CC BY, http://creativecommons.org/licenses/by/4.0/)的条款下发布的开放获取文章，该许可允许在任何情况下不受限制地重复使用该作品

引用次数: 17

Quantitative In Situ Differential Reflectance Spectroscopy Analysis of Polycrystalline Platinum Oxidation in an Aqueous Acidic Electrolyte 多晶铂在酸性水溶液中氧化的定量原位差分反射光谱分析

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0061509EEL

Jing Xu, D. Scherson

A method is herein described that allows the coverage of the two forms of oxide believed to form on polycrystalline Pt, Pt(poly), surfaces in aqueous solutions to be determined based on the analysis of in situ differential reflectance spectroscopy, R/R, and voltammetric data recorded simultaneously. The model employed assumes R/R can be expressed as the sum of contributions due to each type of surface site, i, represented by the product of their potential dependent coverage, θi(E), and a linear function of E obtained empirically. Values of θi(E) for the unoxidized and oxidized sites are calculated by solving a system of three non-linear equations that relate θi(E) to the charge associated with the formation of the oxide layer based on coulometric analyses and accepted values for the number of electrons transferred for each of the oxides. Data collected for Pt(poly) electrodes in aqueous 0.1 M HClO4 was found to be consistent with the coexistence of the two forms of Pt oxide and unoxidized sites on the surface over a potential range extending from ca. 1.0 to 1.25 V. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0061509eel] All rights reserved.

本文描述了一种方法，该方法允许根据同时记录的原位差分反射光谱、R/R和伏安数据的分析来确定水溶液中被认为在多晶Pt、Pt(聚)表面上形成的两种形式的氧化物的覆盖范围。所采用的模型假设R/R可以表示为每种表面站点的贡献之和，i由它们的潜在依赖覆盖率的乘积θi(E)和经验得到的E的线性函数表示。通过求解一个由三个非线性方程组成的系统来计算未氧化和氧化位点的θi(E)值，该系统将θi(E)与基于库仑分析的氧化层形成相关的电荷和每种氧化物转移的电子数的可接受值联系起来。在0.1 M HClO4水溶液中收集的Pt(聚)电极的数据发现，在约1.0至1.25 v的电位范围内，表面上两种形式的氧化Pt和未氧化Pt共存。©作者2015。由ECS出版。这是一篇基于知识共享署名4.0许可(CC BY, http://creativecommons.org/licenses/by/4.0/)的开放获取文章，该许可允许在任何媒体上不受限制地重复使用该作品，前提是正确引用原始作品。[DOI: 10.1149/2.0061509eel]版权所有

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引用次数: 1

Spray-Drying Synthesis of Pure Na2CoPO4F as Cathode Material for Sodium Ion Batteries 喷雾干燥法制备纯Na2CoPO4F钠离子电池正极材料

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0061506EEL

H. Zou, Shouding Li, Xiaobiao Wu, M. J. McDonald, Yong Yang

The expected theoretical energy density of Na2CoPO4F as a cathode material for sodium ion batteries surpasses 500 Wh kg−1 even if considering only one-electron utilized per formula unit. It is therefore one of the highest energy density cathode materials for sodium-ion batteries. In this work, pure phase Na2CoPO4F/C nanocomposite was successfully synthesized by a spray-drying and high temperature sintering method. The Na2CoPO4F/C nanocomposite, when tested vs. sodium metal, delivered a discharge capacity of 107 mAh g−1 with a voltage plateau at 4.3 V. © 2015 The Electrochemical Society. [DOI: 10.1149/2.0061506eel] All rights reserved.

Na2CoPO4F作为钠离子电池正极材料的预期理论能量密度超过500 Wh kg−1，即使考虑每个公式单位只使用一个电子。因此，它是钠离子电池能量密度最高的正极材料之一。本文采用喷雾干燥和高温烧结的方法成功合成了纯相Na2CoPO4F/C纳米复合材料。与金属钠相比，Na2CoPO4F/C纳米复合材料的放电容量为107 mAh g−1，电压平台为4.3 v©2015 The Electrochemical Society。[DOI: 10.1149/2.0061506eel]版权所有

引用次数: 52

A Combinatorial Approach toward the Discovery of Electrolyte Formulations for Non-Aqueous Electrochemical Energy Storage Devices 非水电化学储能装置电解质配方的组合研究

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0081509EEL

Charles A. Cartier, Zhange Feng, James D. Faulk, D. Scherson

A unique robot-type instrument is herein described capable of producing large numbers of non-aqueous electrolyte mixtures involving the most common organic carbonate solvents either currently in use or being considered by the Li-ion battery industry. The ability of this device to accurately dispense computer-controlled mixtures of often highly volatile solvents was validated by comparing the intended formulations against data collected by gas-chromatography-mass spectrometric analysis which yielded results within 3.5% of each other. Key to the success of this powerful combinatorial strategy was the use of temperature-controlled reservoirs to decrease the vapor pressure of the solvents involved, as well as the selection of an appropriate solvent and technique to prevent solvent mixing during the aspiration-delivery steps. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0081509eel] All rights reserved.

本文描述了一种独特的机器人型仪器，能够生产大量非水电解质混合物，包括目前使用或正在考虑的锂离子电池工业中最常见的有机碳酸盐溶剂。通过将预期配方与气相色谱-质谱分析收集的数据进行比较，验证了该设备准确分配计算机控制的高挥发性溶剂混合物的能力，两者的结果误差在3.5%以内。这种强大的组合策略成功的关键是使用温控储层来降低所涉及溶剂的蒸气压，以及选择适当的溶剂和技术，以防止在吸入输送步骤中溶剂混合。©作者2015。由ECS出版。这是一篇基于知识共享署名4.0许可(CC BY, http://creativecommons.org/licenses/by/4.0/)的开放获取文章，该许可允许在任何媒体上不受限制地重复使用该作品，前提是正确引用原始作品。[DOI: 10.1149/2.0081509eel]版权所有

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引用次数: 5

Preparation of Pt/C Catalyst by Coaxial Arc Plasma Deposition for Polymer Electrolyte Membrane Fuel Cells 同轴电弧等离子沉积法制备聚合物电解质膜燃料电池用Pt/C催化剂

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0091510EEL

Y. Agawa, M. Kunimatsu, T. Ito, Yasutaka Kuwahara, H. Yamashita

A coaxial arc plasma deposition (CAPD) source was developed to generate metallic nanoparticles (NPs) with sizes from sub-nanometer to several nanometers. Pt NPs were deposited on a carbon support by CAPD for use as a polymer electrolyte membrane fuel cell (PEMFC) electrode catalyst. The principle of catalyst formation and the mechanism for control of the particle size by CAPD were investigated. Transmission electron microscopy observations were performed for Pt/C catalysts with various Pt contents. Single PEMFCs were fabricated using 1, 5, and 10 wt% Pt/C catalysts, of which the best cell performance was obtained with the 10 wt% Pt/C catalyst.

研究了一种同轴电弧等离子体沉积(CAPD)源，用于制备亚纳米到几纳米尺寸的金属纳米颗粒。采用CAPD技术在碳载体上沉积Pt纳米粒子，作为聚合物电解质膜燃料电池(PEMFC)电极催化剂。研究了催化剂的形成原理和CAPD控制颗粒大小的机理。对不同Pt含量的Pt/C催化剂进行了透射电镜观察。分别用1、5、10 wt% Pt/C催化剂制备了单体pemfc，其中10 wt% Pt/C催化剂的电池性能最好。

引用次数: 8

Electronic Effects in 1,3-diaryl-1,3-diketone Reduction Potentials Correlate with σ0 1,3-二烷基-1,3-二酮还原电位的电子效应与σ0相关

ECS Electrochemistry Letters

Pub Date : 2015-01-01 DOI: 10.1149/2.0091512EEL

Stephen L. Gipson, C. Garner, Basu D. Panthi

引用次数: 0

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