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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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高温固体氧化物电解用于绿色生产.

Hua Liu1, Miao Yu1, Xiaofeng Tong2

  • 1Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.

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固体氧化物电解电池 (SOEC) 提供高效的绿色生产. 材料和系统的持续创新是克服成本和耐用性挑战的关键,以便广泛采用.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 能源工程 能源工程

背景情况:

  • 全球变暖和能源危机需要可再生能源解决方案.
  • 绿色是未来能源系统的关键能源载体.
  • 固体氧化物电解电池 (SOEC) 是绿色生产的一个有前途的技术,因为其高效率和可逆操作.

研究的目的:

  • 提供对SOEC技术最新进展的全面审查.
  • 讨论从细胞到系统水平的进展,包括材料,制造和表征.
  • 分析SOEC的性能,降解机制和缓解策略.

主要方法:

  • 关于SOEC技术的最新科学文献的综述.
  • 分析细胞,堆和系统水平的发展.
  • 讨论材料科学,制造技术和表征方法.
  • 电化学和耐用性能,降解和缓解策略的评估.
  • 关于SOEC与可再生能源系统整合的概要.

主要成果:

  • SOEC 具有很高的电效,不需要贵金属催化剂.
  • 在电池/堆组件,配置,电极材料和制造方法方面的进展已经得到报道.
  • 降解机制和缓解策略对于改善SOEC耐用性至关重要.
  • 当与可再生能源集成时,SOEC系统显示出灵活性,稳定性,可扩展性和能源效率.

结论:

  • 对于未来的绿色社会而言,SOEC技术对于净零排放至关重要.
  • 通过创新克服成本和耐用性挑战对于SOEC商业化至关重要.
  • 鼓励在材料,制造,整合和操作方面进行进一步的研究和开发.