Spinel Single-Crystal Ferroelectrics for Lead-Free Energy Storage
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Solution Overview
Problem
Current energy storage technologies rely heavily on lead-based ferroelectric materials, which are toxic and pose environmental and health risks, necessitating the development of lead-free alternatives.
Innovation Solution
The use of spinel-type single crystals, specifically AB2O4 where A is Ca, Sr, Ba, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, or Zn, and B is a transition metal element or a rare earth element, as ferroelectrics and relaxor ferroelectrics for energy storage applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lead-based ferroelectric materials are used for energy storage, then energy storage performance is improved, but environmental harm and health risks increase
Solution Approach 1:
The patent changes the chemical composition parameters by replacing lead-based materials with spinel-type materials having general formula AB2O4, where A and B represent specific metal elements. This compositional parameter change achieves both non-toxicity and satisfactory energy storage performance, resolving the contradiction between performance and environmental harm.
Solution Approach 2:
The patent employs composite spinel-type materials with specific element combinations (A = Ca, Sr, Ba, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn; B = transition metal or rare earth elements) to achieve the desired properties. The composite nature of these materials allows optimization of both environmental safety and energy storage characteristics.
2Object-affected harmful factors
If lead-free ferroelectric materials are developed, then environmental friendliness is improved, but material performance may deteriorate
Solution Approach 1:
The patent systematically varies the chemical parameters by selecting different A and B elements in the AB2O4 spinel structure to optimize performance. Specific element choices (e.g., Sr, Ba for A site; rare earth elements for B site) are made to enhance dielectric properties and energy storage capacity while maintaining lead-free composition.
Solution Approach 2:
The patent applies local quality optimization by specifically selecting certain metal elements for A and B sites in the spinel structure based on their electronic and ionic properties. This localized element selection at specific crystallographic positions enables tailored performance characteristics for energy storage applications.
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
Spinel-type single crystals exhibit ferroelectricity at room temperature and some exhibit relaxation properties, making them suitable as lead-free relaxor ferroelectrics for energy storage materials and rechargeable products, which are non-toxic, environmentally friendly, and offer improved performance.
Implementation Method 1
spinel-type single crystals exhibit ferroelectricity at room temperature
Implementation Method 2
some exhibit relaxation properties, making them suitable as lead-free relaxor ferroelectrics
Data Source
AI summary
Provided are the uses of spinel-type single crystals as ferroelectrics and relaxor ferroelectrics, which can be applied to energy storage materials, and rechargeable energy storage products. In respect of the use of spinel-type single crystals AB2O4 as ferroelectrics, in AB2O4, A is Ca, Sr, Ba, Ti, V, Cr, Mn, Fe, Co, Ni, Cu or Zn, and B is a transition metal element or a rare earth element. In respect of the use of spinel-type single crystals AB2O4 as relaxor ferroelectrics, in AB2O4, A is Sr, and B is Tb. The energy storage material comprises a spinel-type single crystal AB2O4. The rechargeable energy storage product comprises a spinel-type single crystal AB2O4. The spinel-type single crystals AB2O4 do not contain lead and exhibit ferroelectricity at room temperature, and individual spinel-type single crystals also exhibit a relaxation property, thus being capable of serving as novel lead-free relaxor ferroelectrics; the spinel-type single crystals are non-toxic and harmless, thereby being greener and more environmentally friendly.