New possibilities to obtain ceramic nanoheterostructures with enhanced ionic conductivityстатья
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Дата последнего поиска статьи во внешних источниках: 17 апреля 2024 г.
Аннотация:New possibilities to improve the transport characteristics of ceramic electrode materials, which are important for improvement high-energy electrochemical devices, lithium-ion batteries (LIBs), and solid oxide fuel cells (SOFCs), have been determined. Since the full-scale search for new electrochemically active inorganic structures does not promise substantial progress, it is topical to use the possibilities associated with optimizing the structural parameters of already known materials. It is shown that an enhancement in the specific power of these devices associated with an increase in the ionic conductivity of electrode materials can be achieved at the expense of a combination of size effects and experimentally proven effects of amorphization, i.e., the effects of nonautonomic phases formed on the interfaces of composites from incommensurate structural elements. They can provide a substantial increase in the diffusion mobility of lithium and oxygen ions at intergrain and interphase boundaries. Simple experimental methods to obtain such multi-structured nanomaterials based on electrochemically active phases for LIB positive electrodes are proposed.