Single-Molecule Electret Piezoelectric Material for Continuous Current
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Solution Overview
Problem
Piezoelectric members in existing vibration power generation systems can only generate electrical energy when subjected to continuous vibration, limiting the production of a continuous flow of current.
Innovation Solution
A piezoelectric material comprising a single-molecule electret with a cluster skeleton and stable ionic sites, where a metal ion can migrate between these sites under pressure, continuously changing molecular polarization and generating a continuous flow of current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional piezoelectric element is used in vibration power generation, then electrical energy can be generated through expansion and contraction, but a continuous flow of current cannot be produced unless constant vibration energy is applied
Solution Approach 1:
The patent changes the fundamental mechanism from vibration-dependent expansion/contraction to pressure-dependent metal ion migration. By applying static or dynamic pressure to the single-molecule electret, metal ions migrate between stable ionic sites, continuously changing molecular polarization and generating current without requiring continuous vibration
Solution Approach 2:
The patent replaces the mechanical vibration-based piezoelectric mechanism with a pressure-induced ionic migration mechanism in single-molecule electrets. This substitution allows current generation through ion movement between ionic sites rather than through mechanical expansion and contraction, enabling continuous current flow under sustained pressure
2Reliability
If ferroelectric material is used as piezoelectric material, then polarization can be controlled by electric field, but no piezoelectricity has been demonstrated in single-molecule electrets
Solution Approach 1:
The patent segments the piezoelectric function into discrete ionic sites within the single-molecule electret structure. Metal ions migrate between separate stable ionic sites, creating distinct polarization states. This segmentation allows controlled piezoelectric response through ion movement between defined locations rather than requiring complex bulk material structures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed piezoelectric material and element can produce a continuous flow of current as long as pressure is applied, overcoming the limitation of requiring continuous vibration.
Implementation Method 1
migration of the metal ion included in the at least one of the stable ionic sites to the other one of the stable ionic sites changes molecular polarization; and the polarization continuously changes by having the metal ion of the single-molecule electret migrate to the other one of the stable ionic sites that is hollow, while pressure is applied
Data Source
AI summary
A piezoelectric material contains a single-molecule electret, and the single-molecule electret is a molecule including a cluster skeleton 100 having a continuous hole 101 and a plurality of stable ionic sites 102a and 102b separate from each other within the continuous hole and a metal ion M included in at least one of the stable ionic sites and capable of migrating to another one of the stable ionic sites that is hollow, and migration of the metal ion included in the at least one of the stable ionic sites to the other one of the stable ionic sites changes molecular polarization; and the polarization continuously changes by having the metal ion of the single-molecule electret migrate to the other one of the stable ionic sites that is hollow, while pressure is applied.