已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

La0.75Sr0.25Cr0.5Mn0.5O3 based anodes for Solid Oxide Fuel Cells

材料科学 阳极 氧化物 燃料电池 电化学 甲烷 氢燃料 化学工程 阴极 钙钛矿(结构) 氧化还原 电解质 无机化学 电极 冶金 化学 物理化学 有机化学 工程类
作者
Arianna Giraldin
链接
摘要

Recently, the study of environmentally friendly materials useful in conversion of energy has become an interesting topic in material science. Fuel cells are efficient devices that directly transform chemical energy of fuels into electrical energy, with low or no pollutants emission. In this research, the use of an alternative anode has been investigated. Ni-YSZ based state of the art materials, in fact, suffer of particle sintering and C-poisoning with C-containing gas mixtures. Moreover, the oxidation of Ni particles can contribute to destroy the device. La0.75Sr0.25Cr0.5Mn0.5O3-δ (LSCM) perovskite was first proposed by Tao et al. as an alternative anode.[1] Inspired by this work, LSCM is fully characterised and its electrochemical performance has been studied utilising both methane and hydrogen as fuel. The possibility of enhancing electrocatalytic proprieties has been tempted using impregnation and infiltration of 5wt% of nickel. LSCM is synthetized using Marcilly method, starting from metal precursors. [2] It is characterised by several techniques. XRD is used to understand the crystallographic structure and to evaluate the presence of all constituents inside the cell. TPR curves give information about the processes of reduction at different temperatures. It can be noted a single peak at 403°C related to the reduction of Mn4+ to Mn3+. The presence of this redox couple can be strategic to obtain a Mixed Ionic and Electronic Conductor (MIEC). The use of MIECs can enhance the performance and reduce the Triple Phase Boundary criticisms. The powder surface area is determined using BET technique. Data concerning structure and granulometry are obtained using SEM. XPS and EDX analysis permit the compositional study of the electrode and the evaluation of eventual segregation processes. To test electrochemical performance of LSCM, a symmetric cell is prepared based on electrolyte supported geometry, using YSZ as electrolyte. At first the ink optimization was carried out: different inks are developed and compared to have good adhesion between electrode and electrolyte. Optimized ink is deposited by tape casting technique. Further efforts have been invested in the electron collector. The electrochemical performance was tested utilising Electrochemical Impedance Spectroscopy. Both hydrogen and methane have been used as fuel and different working temperatures have been selected. To evaluate the activating effect of Ni, a composite anode Ni/LSCM made by impregnation has been studied. The slow amount of Ni chosen (5wt%) and the highly dispersed deposition obtained allows avoiding the disadvantages connected with its utilisation. Consistently, the catalytic activity and electronic conductivity of the anodic material are enhanced. [1] S. Tao, J.T.S. Irvine, Nat Mater.,2003, 2,320. [2] C. Marcilly, P. Courty, and B. Delmon, J. Am. Ceram. Soc., 1970, 53, 56

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
令宏发布了新的文献求助10
1秒前
向东东完成签到,获得积分10
7秒前
笑点低的硬币完成签到,获得积分10
8秒前
9秒前
11秒前
斜玉完成签到,获得积分10
12秒前
vivian发布了新的文献求助10
13秒前
Xieyusen发布了新的文献求助10
17秒前
tuanheqi发布了新的文献求助20
18秒前
冷静新烟发布了新的文献求助10
20秒前
iorpi完成签到,获得积分10
24秒前
宇宇完成签到 ,获得积分10
24秒前
太叔十三完成签到 ,获得积分10
27秒前
30秒前
刘天宇完成签到 ,获得积分10
30秒前
充电宝应助焦糖采纳,获得10
30秒前
zy完成签到 ,获得积分10
31秒前
Omni完成签到 ,获得积分0
32秒前
SPLjoker完成签到 ,获得积分10
32秒前
冷艳薯片完成签到,获得积分10
33秒前
gjm完成签到,获得积分10
34秒前
38秒前
小L完成签到 ,获得积分10
38秒前
英勇的红酒完成签到 ,获得积分10
41秒前
42秒前
julien完成签到,获得积分10
43秒前
44秒前
隐形曼青应助ttt采纳,获得10
45秒前
45秒前
大个应助科研进化中采纳,获得10
49秒前
千倾完成签到 ,获得积分10
49秒前
生动夏青完成签到,获得积分10
52秒前
ho hou h发布了新的文献求助10
53秒前
53秒前
在水一方应助旨酒欣欣采纳,获得10
53秒前
leeSongha完成签到 ,获得积分10
53秒前
54秒前
殷勤的紫槐完成签到,获得积分10
54秒前
爆米花应助科研通管家采纳,获得10
55秒前
高分求助中
Ophthalmic Equipment Market by Devices(surgical: vitreorentinal,IOLs,OVDs,contact lens,RGP lens,backflush,diagnostic&monitoring:OCT,actorefractor,keratometer,tonometer,ophthalmoscpe,OVD), End User,Buying Criteria-Global Forecast to2029 2000
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Immigrant Incorporation in East Asian Democracies 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3965486
求助须知:如何正确求助?哪些是违规求助? 3510790
关于积分的说明 11155096
捐赠科研通 3245285
什么是DOI,文献DOI怎么找? 1792783
邀请新用户注册赠送积分活动 874096
科研通“疑难数据库(出版商)”最低求助积分说明 804171