Reversible solid oxide cell(RSOC)is a new energy conversion device with significant applications,especially for power grid peaking shaving.However,the reversible conversion process of power generation/energy storage p...Reversible solid oxide cell(RSOC)is a new energy conversion device with significant applications,especially for power grid peaking shaving.However,the reversible conversion process of power generation/energy storage poses challenges for the performance and stability of air electrodes.In this work,a novel high-entropy perovskite oxide La_(0.2)Pr_(0.2)Gd_(0.2)Sm_(0.2)Sr_(0.2)Co_(0.8)Fe_(0.2)O_(3−δ)(HE-LSCF)is proposed and investigated as an air electrode in RSOC.The electrochemical behavior of HE-LSCF was studied as an air electrode in both fuel cell and electrolysis modes.The polarization impedance(Rp)of the HE-LSCF electrode is only 0.25Ω·cm^(2) at 800℃ in an air atmosphere.Notably,at an electrolytic voltage of 2 V and a temperature of 800℃,the current density reaches up to 1.68 A/cm^(2).The HE-LSCF air electrode exhibited excellent reversibility and stability,and its electrochemical performance remains stable after 100 h of reversible operation.With these advantages,HE-LSCF is shown to be an excellent air electrode for RSOC.展开更多
China Exclusive： Mobile Internet Keeps Tibet in Touch Tibet, on the ＂roof of the world,＂ is coming closer to the outside world through the Internet and smart mobile devices. Most of the younger lamas in the monas...China Exclusive： Mobile Internet Keeps Tibet in Touch Tibet, on the ＂roof of the world,＂ is coming closer to the outside world through the Internet and smart mobile devices. Most of the younger lamas in the monastery have mobile phones with web capabilities. They study, search for information, network and chat. Messaging app WeChat is very popular among spiritual scholars.展开更多
根据有限的开发信息预测景观变化及其带来的影响是指导空间战略规划制定的重要步骤。英国基于景观特征评估(landscape character assessment,LCA)的景观敏感性评估(landscape sensitivity assessment,LSA)提供了一种综合、清晰、易懂的...根据有限的开发信息预测景观变化及其带来的影响是指导空间战略规划制定的重要步骤。英国基于景观特征评估(landscape character assessment,LCA)的景观敏感性评估(landscape sensitivity assessment,LSA)提供了一种综合、清晰、易懂的方法来辅助规划和开发决策。从景观特征的角度理解景观敏感性,系统介绍了英国LSA的发展和方法,并通过案例展示其关键步骤及在不同规模尺度下的应用,最后提出了中国对英国LSA的借鉴和应用展望。展开更多
基金supported by Fundamental Research Funds for the Central Universities(2023KYJD1008)the Science Research Projects of the Anhui Higher Education Institutions of China(2022AH051582).
文摘Reversible solid oxide cell(RSOC)is a new energy conversion device with significant applications,especially for power grid peaking shaving.However,the reversible conversion process of power generation/energy storage poses challenges for the performance and stability of air electrodes.In this work,a novel high-entropy perovskite oxide La_(0.2)Pr_(0.2)Gd_(0.2)Sm_(0.2)Sr_(0.2)Co_(0.8)Fe_(0.2)O_(3−δ)(HE-LSCF)is proposed and investigated as an air electrode in RSOC.The electrochemical behavior of HE-LSCF was studied as an air electrode in both fuel cell and electrolysis modes.The polarization impedance(Rp)of the HE-LSCF electrode is only 0.25Ω·cm^(2) at 800℃ in an air atmosphere.Notably,at an electrolytic voltage of 2 V and a temperature of 800℃,the current density reaches up to 1.68 A/cm^(2).The HE-LSCF air electrode exhibited excellent reversibility and stability,and its electrochemical performance remains stable after 100 h of reversible operation.With these advantages,HE-LSCF is shown to be an excellent air electrode for RSOC.
文摘China Exclusive： Mobile Internet Keeps Tibet in Touch Tibet, on the ＂roof of the world,＂ is coming closer to the outside world through the Internet and smart mobile devices. Most of the younger lamas in the monastery have mobile phones with web capabilities. They study, search for information, network and chat. Messaging app WeChat is very popular among spiritual scholars.
文摘根据有限的开发信息预测景观变化及其带来的影响是指导空间战略规划制定的重要步骤。英国基于景观特征评估(landscape character assessment,LCA)的景观敏感性评估(landscape sensitivity assessment,LSA)提供了一种综合、清晰、易懂的方法来辅助规划和开发决策。从景观特征的角度理解景观敏感性,系统介绍了英国LSA的发展和方法,并通过案例展示其关键步骤及在不同规模尺度下的应用,最后提出了中国对英国LSA的借鉴和应用展望。
