CeO2-based composite solid electrolyte material and preparation method thereof

A solid electrolyte and mixed liquid technology, which is applied in circuits, fuel cells, electrical components, etc., can solve the problem that the electrical conductivity needs to be improved, and achieve the effects of improving electrochemical performance, fewer pores, and simple preparation process.

Active Publication Date: 2020-08-25
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CeO 2 The conductivity of solid electrolyte materials at the medium and low temperature stage still needs to be improved, which has become an important research direction at present.

Method used

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  • CeO2-based composite solid electrolyte material and preparation method thereof
  • CeO2-based composite solid electrolyte material and preparation method thereof
  • CeO2-based composite solid electrolyte material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a CeO 2 matrix composite solid electrolyte material, the general structural formula is as follows: Ce 0.8 PR 0.1 La 0.1 o 2–δ x(Li 0.5 K 0.5 Cl), where δ is the amount of oxygen deficiency.

Embodiment 2

[0031] a CeO 2 matrix composite solid electrolyte material, the general structural formula is as follows: Ce 0.8 PR 0.1 La 0.1 o 2–δ x(Li 0.5 K 0.5 Cl), where δ is the amount of oxygen deficiency, 1 / 3≤x≤3.

[0032] CeO 2 The preparation method of matrix composite solid electrolyte material comprises the following steps:

[0033] S1, according to the general structural formula Ce 0.8 PR 0.1 La 0.1 o 2–δ x(Li 0.5 K 0.5 Cl), take by weighing 鐠 salt, cerium salt, lanthanum salt, potassium chloride and lithium chloride, mix with an appropriate amount of organic acid, then add water to dissolve, to obtain a mixed solution;

[0034] S2, adjusting the pH of the mixed solution to neutral to obtain a precursor;

[0035] S3. Microwave combustion reaction of the precursor at 800-1200W for 10-30min, then dry at 120-150°C for 0.5-2h, and ball mill to obtain CeO 2 based composite solid electrolyte materials.

[0036] Wherein, the molar amount of the organic acid=(1-1.5)×(nCe+...

Embodiment 3

[0041] a CeO 2 Based composite solid electrolyte material, its preparation method comprises the following steps:

[0042] S1, according to the general structural formula Ce 0.8 PR 0.1 La 0.1 o 2–δ x(Li0.5 K 0.5 Cl), x=1 / 3, weighed nitrate, cerium nitrate, lanthanum nitrate, potassium chloride and lithium chloride, mixed with an appropriate amount of tartaric acid, then dissolved in water to obtain a mixed solution;

[0043] S2, adjusting the pH of the mixed solution to neutral to obtain a precursor;

[0044] S3. Microwave the reaction of the precursor at 1000W for 15min, then dry at 140°C for 1h, and ball mill to obtain CeO 2 based composite solid electrolyte materials.

[0045] Wherein, the molar amount of tartaric acid=1.2×(nCe+nPr+nLa+nLi+nK).

[0046] a CeO 2 Based composite solid electrolyte, its preparation method is as follows:

[0047] (1) the above prepared CeO 2 After the matrix composite solid electrolyte material is dried, add PVA binder solution with a ...

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Abstract

The invention discloses a CeO2-based composite solid electrolyte material and a preparation method thereof. The structural general formula of the CeO2-based composite solid electrolyte material is asfollows: Ce0.8Pr0.1La0.1O2-delta.x(Li0.5K0.5Cl), and delta is oxygen deficit. The Ce0.8Pr0.1La0.1O2-delta material is doped with a specific low-melting-point salt Li0.5K0.5Cl through a microwave combustion-supporting method, the CeO2-based solid composite electrolyte material is formed, the conductivity of the material in medium and low temperature stages can be greatly improved, the electrochemical performance of the material is improved, and the method is simple in preparation process, low in cost, quick, energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of solid electrolytes, in particular to a CeO 2 Matrix composite solid electrolyte material and its preparation method. Background technique [0002] Solid electrolyte fuel cell (SOFC) belongs to the third-generation fuel cell, which has the advantages of high conversion efficiency, environmental friendliness and high system safety. The electrolyte is the core component of SOFC, and its performance directly determines the operating temperature and performance of the fuel cell. The role of the electrolyte is to separate the fuel gas from the oxidizing gas while allowing only ions to pass through, not electrons. In this way, ions can pass through the electrolyte, and electrons can only move from one pole to the other through the external circuit. Currently, CeO 2 Base-doped materials are one of the hotspots in the study of solid electrolyte materials. CeO 2 It has higher ionic conductivity and lower cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016
CPCH01M8/1016Y02E60/50
Inventor 阳杰尹奇异朱德伦王明李少波孟俊杰徐建华曹龙
Owner HEFEI UNIV
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