Xianming WU
,
Mingyou MA
,
Zhuobing XIAO
,
Zeqiang HE
,
Jianben LIU
,
Mingfei XU
,
null
,
null
,
null
,
null
,
null
,
null
,
null
,
null
,
null
材料科学技术（英）
Cathode material LiMn2O4 thin films were prepared by solution deposition followed by conventional thermal annealing (CTA) and rapid thermal annealing (RTA) using lithium acetate and manganese acetate as starting materials. The phase and surface morphology identification was done by X-ray diffraction and scanning electron microscopy. The electrochemical properties of the thin films were carried out by cyclic voltammetry, charge-discharge experiments, electrochemical impedance spectroscopy and potential step technique. The results show that both thin films are homogeneous and crack-free. Compared with the CTA derived thin films, the RTA derived ones with smaller grain size are more smooth and dense. The CTA and RTA derived LiMn2O4 thin films deliver the capacity of 34.5μAh/(cm2•\μm) and 38 μAh/(cm2•μm) and show the capacity loss of 0.050% and 0.037% per cycle after being cycled 100 times, respectively. The diffusion coefficient of lithium ion in the CTA derived LiMn2O4 thin-film electrode is 4.59×10-11 cm2/s, and that of lithium ion in the RTA derived one is 3.86×10-11 cm2/s.
关键词:
Cathode
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null
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null
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null
刘伟星
,
赵哲
,
涂宝峰
,
崔大安
,
区定容
,
程谟杰
催化学报
doi:10.1016/S1872-2067(14)60235-7
纳米TiO2修饰的La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF)阴极被直接应用于YSZ电解质电池上. TiO2可阻止LSCF和YSZ间的化学反应,抑制SrZrO3的形成. LSCF-0.25 wt% TiO2阴极电池在0.7 V和600°C下的电流密度是LSCF阴极电池的1.6倍.电化学阻抗谱结果表明, TiO2修饰显著加快了氧离子注入电解质的过程,这可能与TiO2抑制了阴极/电解质界面处高电阻SrZrO3层的形成有关.本文为在ZrO2基电解质上使用高性能的(La,Sr)(Co,Fe)O3阴极材料提供了一种简单有效的方法.
关键词:
中温固体氧化物燃料电池
,
阴极
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二氧化钛
,
界面反应
,
氧化锆基电解质
魏伟
,
王大伟
,
杨全红
新型炭材料
碳基材料具有丰富多元的形态和优异的性能，是目前储能材料的重要组成部分。简要评述碳基材料作为锂空气电池阴极时结构与性能的关系，讨论碳基材料的结构设计与功能调控的重要性，指明碳基材料在锂空气电池中的研究重点，并对其在锂空气电池中的应用进行了展望。
关键词:
锂空气电池
,
碳基材料
,
阴极
,
结构设计
