【摘 要】
:
高温质子交换膜燃料电池(HT-PEMFCs)由于操作在较高温度(120~200 oC)下而具有 (1)阴阳极动力学速度明显加快,(2)阳极对燃料中CO 等杂质气体的耐受能力明显提高,(3)阴极生成的产物为气态水,避免了电极被水淹的困扰,大大简化了PEMFCs 水管理系 统,(4)简化了系统热管理系统,并且有望实现非贵金属催化剂的使用等优点而成为质子交 换膜燃料电池的重要发展方向.
【机 构】
:
北京航空航天大学化学与环境学院,北京,100191
论文部分内容阅读
高温质子交换膜燃料电池(HT-PEMFCs)由于操作在较高温度(120~200 oC)下而具有 (1)阴阳极动力学速度明显加快,(2)阳极对燃料中CO 等杂质气体的耐受能力明显提高,(3)阴极生成的产物为气态水,避免了电极被水淹的困扰,大大简化了PEMFCs 水管理系 统,(4)简化了系统热管理系统,并且有望实现非贵金属催化剂的使用等优点而成为质子交 换膜燃料电池的重要发展方向.
其他文献
The cycle performance at high voltage up to 4.8V for spinel LiMn2O4(LMO) was investigated at 55℃.It was found that the cycle stability was dramatically improved when dimethoxydimethylsilane(DDS) was a
CoFe2O4 not only has superior magnetic properties,1 but also has stable electrochemical properties.The high theoretical specific capacity (~916 mAh g-1) enable it to be an promising anode material in
锂离子电池由于其体积小、能量密度高的优势,成为迄今为止移动终端、消费电子产品的主要能源供应手段,且目前有迚军混合动力和纯电动汽车领域的态势.然而,目前商业化锂离子电池的负极材料主要还是采用石墨化碳材料,但其理论比容量较小,只有372mAh/g,难以满足高比能量锂离子电池的需求.
Recently,many research works have been reported on graphene as anodes for Li-ion batterys (LIBs).But due to its limited theoretical capacity of 744mAh/g,the up-to-date research attempts begin to focus
Nanostructured transition metal oxides,a particular class of nanomaterials,are crucial for the development of various novel materials with functionality and smartness.These transition metal oxides nan
Li/CFx电池能量密度高(2180Wh/kg),安全性能好,低温性能优异,寿命长,被广泛地用于军事与民用领域.然而传统的Li/CFx电池正极材料氟化碳导电性差,电极动力学缓慢,同时价格不菲,大大制约了锂/氟化碳电池的发展.近年来,随着材料开发技术的发展、实验设计的完善和各种测试手段提高,使研究者们对锂/氟化碳电池的反应机理有了更进一步的理解,大大提高了锂/氟化碳电池倍率特性.
尖晶石结构的钛酸锂(Li4Ti5O12,LTO),其在充放电(嵌脱锂)过程中晶格常数几乎不发生变化,从而在脱嵌锂过程中表现出良好的可逆性和结构稳定性,是重要的锂电池负极材料,主要应用于高安全、长寿命和高功率等场合.然而钛酸锂系电池在活化、使用及储存过程中会发生气胀,引起电池外壳变形进而导致电池性能的急剧下降,这是制约其实际应用的重要障碍[1-2].
Lithium ion batteries (LIBs) are the dominant mobile power sources in the current society.However,as an essential component of LIBs,the present commercial graphite-based anode materials with limited s
Lithium ion batteries have been widely used as power sources for portable electronic devices and expanded to use in electric vehicles and energy storage system due to their high energy/power density,l
The ESR measurements of the emeraldine salt of polyaniline were done in a wide pH range of 0.20 M H2SO4 solution (pH 0.7)to 0.30 M Na2SO4 solution of pH 12.0.It was found that the ESR signal of polyan