Diffuson-based thermal and ionic transport in Cu+ conducting materials

铜导电材料中基于扩散的热和离子传输

• 批准号: 526401433
• 负责人: Professor Dr. Wolfgang Zeier
• 金额: --
• 依托单位: Institut für Anorganische und Analytische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/526401433?language=en
• 关键词: Diffuson; based; thermal; ionic; transport

Ionic conductivity of Cu+ and Ag+ in solids is often associated with low thermal conductivities. However, while low thermal transport is beneficial for a variety of applications such as thermoelectric, the underlying connection of heat and ionic transport is unclear. The proposal is based on the hypothesis that heat transport in these superionic conductors is not governed by classic phonon transport, but rather by local thermal energy exchange between phonons, the “diffusons”. The diffuson heat transport is suggested to stem from structural factors that also lead to ionic transport. Nevertheless, to corroborate this hypothesis, selected materials compositions need to be explored and a connection between heat and ion transport needs to be established. The proposal seeks a fundamental understanding and connection of heat and ionic transport in Cu+ - based thermoelectric materials, and will afterwards evaluate the required thermoelectric design principles in light of ion transport.

固体中Cu+和Ag+的离子电导率通常与低导热系数有关。然而，虽然低热输运有利于热电等各种应用，但热和离子输运的潜在联系尚不清楚。这个提议是基于这样一个假设，即这些超离子导体中的热传输不是由经典的声子传输控制的，而是由声子之间的局部热能交换（即“扩散”）控制的。认为扩散热输运源于结构因素，而结构因素也导致离子输运。然而，为了证实这一假设，需要探索选定的材料成分，并建立热和离子输运之间的联系。该提案寻求对Cu+基热电材料中热量和离子输运的基本理解和联系，然后根据离子输运评估所需的热电设计原则。