Electrochemical characteristics of sawdust and its pyrolytic products in solid oxide fuel cell with molten Sn anode

WANG Tiancheng; XU Kai; DONG Jizhou; ZOU Chan; HU Hongyun; GAO Linxia; LI Xi; YAO Hong

doi:10.19666/j.rlfd.202112252

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Electrochemical characteristics of sawdust and its pyrolytic products in solid oxide fuel cell with molten Sn anode

更新时间：2025-09-28

- Electrochemical characteristics of sawdust and its pyrolytic products in solid oxide fuel cell with molten Sn anode
- Thermal Power Generation Vol. 51, Issue 5, Pages: 113-120(2022)
- 作者机构：
  
  1. 湖北工业大学土木建筑与环境学院
  2. 华中科技大学能源与动力工程学院煤燃烧国家重点实验室
  3. 深圳华中科技大学研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202112252
  CLC： TM911.4
- Published：2022
- 稿件说明：
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WANG Tiancheng, XU Kai, DONG Jizhou, et al. Electrochemical characteristics of sawdust and its pyrolytic products in solid oxide fuel cell with molten Sn anode[J]. Thermal power generation, 2022, 51(5): 113-120.
DOI：

WANG Tiancheng, XU Kai, DONG Jizhou, et al. Electrochemical characteristics of sawdust and its pyrolytic products in solid oxide fuel cell with molten Sn anode[J]. Thermal power generation, 2022, 51(5): 113-120. DOI： 10.19666/j.rlfd.202112252.

摘要

为了探究固体氧化物燃料电池（SOFC）阳极熔融锡对生物质热解特性及电化学参数的影响，选择松木屑为研究对象，测试了松木屑及其热解气液产物在熔融锡阳极固体氧化物燃料电池（Sn-SOFC）中的电化学性能。结果表明：熔融锡使得松木屑热解气中H_2的体积分数提升约130.1%，而含碳气体（CO、CO_2、CH_4）体积分数下降了40.4%；相比于传统Ni/YSZ阳极，松木屑及其热解焦在锡阳极阻抗提高可达45%，导致在锡阳极初始电流密度降低到0.243 A/cm~2；对于松木屑气液产物，由于其在熔融锡中溶解度较低，导致Sn O_2在阳极积累，放电电流密度衰减速度可达1.922×10~(–5) A/(cm~2·s)，经扫描电子显微镜（SEM）及能量色散X射线谱（EDS）检测发现，积碳悬浮于熔融锡上层，因此避免了对阳极层的破坏。

Abstract

In order to explore the effect of molten Sn anode of solid oxide fuel cell (SOFC) on pyrolysis characteristics and electrochemical parameters of biomass

by taking pine sawdust as the research object

the electrochemical performance of the pine sawdust and its pyrolysis products (gases and liquids) on the molten Sn anode were detected.The results show that

the molten Sn increased the release of H_2 by 130.1%and decreased the yield of carbonaceous gases (CO

CO_2 and CH_4) by 40.4%during sawdust pyrolysis.Compared with the conventional Ni/YSZ anode

the impedance of Sn anode for pine sawdust and its char increased by 45%

resulting in that the initial current density only reduced to 0.243 A/cm~2.For the gas and liquid products of pine sawdust

Sn O_2 accumulated at the anode due to its low solubility in the molten Sn

and the decay rate of discharge current was 1.922×10~(–5) A/(cm~2·s).Through the scanning electron microscope (SEM) and X-ray energy dispersive spectrometer(EDS) analysis

it found that the accumulated carbon suspended on the upper layer of the molten Sn

so Sn can avoid the damage of carbon deposition to the anode layer.

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