Perovskite Hydride Ceramic Cell Electrolyte for Leakage Suppression
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Solution Overview
Problem
Ceramic reversible cells, such as steam electrolysis cells and fuel cells, do not exhibit sufficient properties and require further improvement in terms of electrolysis current density, output, and Faradaic efficiency.
Innovation Solution
Incorporating perovskite-type metal oxides, their hydrates, or hydrides, with specific compositions and hydride ions, and maintaining a particular equilibrium state with dry hydrogen, to introduce hydride ions, thereby suppressing hole or electron leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional ceramic reversible cells are used, then basic functionality is maintained, but electrolysis current density, output, and Faradaic efficiency are insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the ceramic electrolyte by incorporating specific ratios of Ba, Zr, Ce, and M elements (where M is In, Fe, Cr, or Mn) in the perovskite structure ABO3-d. This compositional parameter optimization enhances both electrolysis current density and Faradaic efficiency while maintaining stable cell performance through controlled material chemistry
Solution Approach 2:
The patent creates a composite ceramic material system combining perovskite-type metal oxide with specific dopant elements (Ba, Sr, Ca at A-site; Zr, Sn, Ce, Ti, Hf at B-site; In, Fe, Cr, Mn as M-element). This composite approach integrates multiple functional properties into a single electrolyte material, simultaneously improving productivity and reliability
2Power
If conventional ceramic reversible cells are used, then basic fuel cell operation is maintained, but output at 600°C is insufficient
Solution Approach 1:
The patent optimizes the chemical composition parameters of the perovskite electrolyte to enhance power output specifically at 600°C operating temperature. By adjusting the stoichiometric ratios and dopant concentrations in the ABO3-d structure, the material exhibits improved electrochemical performance at this intermediate temperature range
3Productivity
If conventional ceramic reversible cells are used, then basic ammonia co-electrolysis function is maintained, but Faradaic efficiency of ammonia at 600°C is insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters of the ceramic electrolyte to specifically enhance ammonia production efficiency. By optimizing the dopant ratios and cationic composition in the perovskite structure, the cell achieves higher Faradaic efficiency for ammonia at 600°C, reducing energy loss and improving overall conversion efficiency
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
Enhances electrolysis current density, output, and Faradaic efficiency, particularly at 600°C, surpassing conventional art.
Implementation Method 1
include hydride ions when brought into an equilibrium state by contact with dry hydrogen having a water content of 20 ppm or less in a volume ratio at 500°C to 900°C
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B~2C
AI summary
A ceramic reversible cell including any one or more selected from the group consisting of a perovskite-type metal oxide, a hydrate of the perovskite-type metal oxide and a hydride of the perovskite-type metal oxide, in which the any one or more selected from the group consisting of the perovskite-type metal oxide, the hydrate of the perovskite-type metal oxide, and the hydride of the perovskite-type metal oxide include A (A being any one or more selected from the group consisting of Ba, Sr and Ca), B (B being any one or more selected from the group consisting of Zr, Sn, Ce, Ti and Hf), and M (M being any one or more selected from the group consisting of In, Fe, Cr and Mn) as main metal atoms, and satisfy the predetermined formula and include hydride ions when brought into an equilibrium state by contact with dry hydrogen having a water content of 20 ppm or less in a volume ratio at 500°C to 900°C.