| Using of fossil energy has brought two major problems: energy crisis and environmental pollution. In order to deal with these problems, development of more clean, efficient energy produce and transformation system is becoming an important approach. Solid oxide fuel cell(SOFC), especially for low temperature solid oxide fuel cell(LTSOFC) is a kind of clean, efficient, flexible and low noise energy conversion device, so more and more experts and scholars and government have paid attention to it.Focusing on the preparation of transition metal oxide Li Ni Cu Zn O(LNCZ) and its application in low temperature SOFC, especially in electrolyte free single component fuel cell, a series of research were conducted.In this work, LNCZ were prepared by three approaches, including dual-template method, sol-gel method and solid state reaction method. And the influences of Artemia cyst shell proportion, calcination temperature of LNCZ precursor and mass ratio of LNCZ on performance of solid oxide fuel cell were also investigated.The results were concluded as follows:First of all, as a hard template, when the amount of Artemia cyst shell was up to 20% of metal nitrates, the hard template can fulfil its structure direction role in the synthesis of hierarchical porous LNCZ. When the as-prepared LNCZ was used as electro-catalyst and semiconductor respectively in the three layer fuel cell and electrolyte free fuel cell, the corresponding peak power density can be up to 132 m W/cm2å'Œ 155 m W/cm2.When the LNCZ prepared by sol-gel method was calcined at 500 °C, maximum power density of the electrolyte free fuel cell can be up to 785 m W/cm2. Besides, existence of bulk heterojunction junction in the single layer fuel cell was proved.When the LNCZ prepared by solid state reaction method was calcined at 700 °C, and when the mass ratio of as-prepared LNCZ/NSDC was 30/70, peak power density of single layer fuel cell was highest, which can be up to 1045 m W/cm2. |
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