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基于SOFC技术的瓦斯燃料电池阳极积碳问题的研究应用
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作者 边秀玲 《江西化工》 2023年第2期66-69,共4页
对于CH_(4)含量在6%~30%的煤矿瓦斯,一般不进行利用而直接排放,但CH_(4)在空气中有爆炸的危险,且会污染环境。CH_(4)是很好的发电燃料,CH_(4)的排放不仅浪费了能源还造成了环境污染。为解决这一问题,提出了以煤矿瓦斯为燃料的固体氧化... 对于CH_(4)含量在6%~30%的煤矿瓦斯,一般不进行利用而直接排放,但CH_(4)在空气中有爆炸的危险,且会污染环境。CH_(4)是很好的发电燃料,CH_(4)的排放不仅浪费了能源还造成了环境污染。为解决这一问题,提出了以煤矿瓦斯为燃料的固体氧化物燃料电池SOFC技术,经过实验研究发现,在适宜的温度及O_(2)浓度氛围中,电池具有良好的电化学性能,但存在阳极积碳问题,因此提出以Mo-NiTiO_(3)作为阳极重整层材料解决阳极积碳问题,结果表明,该方法可有效解决阳极积碳问题,同时进一步提高电池的电化学性能,这说明以煤矿瓦斯作为燃料的SOFC发电技术是切实可行的。 展开更多
关键词 瓦斯燃料电池 SOFC 阳极积碳
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Preparation and electrochemical lithium storage performance of porous silicon microsphere composite with metal modification and carbon coating
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作者 XU Zeyu LU Tongzhou +1 位作者 SHAO Haibo WANG Jianming 《无机化学学报》 SCIE CAS CSCD 北大核心 2024年第10期1995-2008,共14页
This work adopts a multi⁃step etching⁃heat treatment strategy to prepare porous silicon microsphere com⁃posite with Sb⁃Sn surface modification and carbon coating(pSi/Sb⁃Sn@C),using industrial grade SiAl alloy micro⁃sp... This work adopts a multi⁃step etching⁃heat treatment strategy to prepare porous silicon microsphere com⁃posite with Sb⁃Sn surface modification and carbon coating(pSi/Sb⁃Sn@C),using industrial grade SiAl alloy micro⁃spheres as a precursor.pSi/Sb⁃Sn@C had a 3D structure with bimetallic(Sb⁃Sn)modified porous silicon micro⁃spheres(pSi/Sb⁃Sn)as the core and carbon coating as the shell.Carbon shells can improve the electronic conductivi⁃ty and mechanical stability of porous silicon microspheres,which is beneficial for obtaining a stable solid electrolyte interface(SEI)film.The 3D porous core promotes the diffusion of lithium ions,increases the intercalation/delithia⁃tion active sites,and buffers the volume expansion during the intercalation process.The introduction of active met⁃als(Sb⁃Sn)can improve the conductivity of the composite and contribute to a certain amount of lithium storage ca⁃pacity.Due to its unique composition and microstructure,pSi/Sb⁃Sn@C showed a reversible capacity of 1247.4 mAh·g^(-1) after 300 charge/discharge cycles at a current density of 1.0 A·g^(-1),demonstrating excellent rate lithium storage performance and enhanced electrochemical cycling stability. 展开更多
关键词 silicon⁃based anode porous structure metallic deposition carbon coating electrochemical lithium storage
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