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Directing the photogenerated charge flow in a photocathodic metal protection system with single-domain ferroelectric PbTiO_(3)nanoplates
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作者 Hui Xie Jianyou Yu +3 位作者 Yuchen Fang Zhijun Wang Shihe Yang Zheng Xing 《Electron》 2024年第3期1-12,共12页
Photocathodic protection(PCP)is arguably an ideal alternative technology to the conventional electrochemical cathodic protection methods for corrosion mitigation of metallic infrastructure due to its eco-friendliness ... Photocathodic protection(PCP)is arguably an ideal alternative technology to the conventional electrochemical cathodic protection methods for corrosion mitigation of metallic infrastructure due to its eco-friendliness and low-energy-consumption,but the construction of highlyefficient PCP systems still remains challenging,caused primarily by the lack of driving force to guide the charge flow through the whole PCP photoanodes.Here,we tackle this key issue by equipping the PCP photoanode with ferroelectric single-domain PbTiO_(3)nanoplates,which can form a directional“macroscopic electric field”throughout the entire photoanode controllable by external polarization.The properly poled PCP photoanode allows the photogenerated electrons and holes to migrate in opposite directions,that is,electrons to the protected metal and holes to the photoanode/electrolyte interface,leading to largely suppressed charge annihilation and consequently a considerable boost in the overall solar energy conversion efficiency of the PCP system.The as-fabricated photoanode can not only supply sufficient photocurrent to 304 stainless steel to initiate cathodic protection,but also shift the metal potential to the corrosion-free range.Our findings provide a viable design strategy for future high-performance PCP systems based on ferroelectric nanomaterials with enhanced charge flow manipulation. 展开更多
关键词 charge separation energy conversion ferroelectric materials photocathodic metal protection SEMICONDUCTORS
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STEADY HEAT TRANSFER ANALYSIS AND PARAMETER OPTIMIZATION FOR MULTILAYER THERMAL INSULATIONS 被引量:2
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作者 闫长海 曲寿江 +3 位作者 孟松鹤 陈贵清 杜善义 刘国仟 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2006年第4期257-263,共7页
The energy equilibrium equation and discrete ordinate methods are combined to establish the one-dimensional steady heat transfer mathematical model of multi-layer thermal insulations (MTIs) in metallic thermal prote... The energy equilibrium equation and discrete ordinate methods are combined to establish the one-dimensional steady heat transfer mathematical model of multi-layer thermal insulations (MTIs) in metallic thermal protection systems. The inverse problem of heat transfer is solved by the genetic algorithm and data from the steady heat transfer experiment of fibrous thermal insulations. The density radiation attenuation coefficient, the albedo of fibrous thermal insulations and the surface emissivity of reflective screens are optimized. Finally, the one-dimensional steady heat transfer model of MTIs with optimized thermal physical parameters is verified by experimental data of the effective MTI conductivity. 展开更多
关键词 metallic thermal protection system steady heat transfer muhilayer thermal insulations genetic algorithm
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Thin buffer layer assist carbon-modifying separator for long-life lithium metal anodes 被引量:1
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作者 Jiaqi Li Hongsheng Jia +7 位作者 Haibo Li Xing Zhao Guiru Sun Zhiyong Chang Lei Li Ming Jin Zhao Wang Ming Feng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第6期61-68,I0003,共9页
The guided Li dendrite growth by carbon-modifying separator is believed to be an effective strategy for enhancing life of lithium metal batteries(LMBs).However,the weak adhesions,as well as the large interface impedan... The guided Li dendrite growth by carbon-modifying separator is believed to be an effective strategy for enhancing life of lithium metal batteries(LMBs).However,the weak adhesions,as well as the large interface impedance between the smooth separator and the carbon functional layer(CFL) lead to an easily peeling of the CFL after repetitive cycles.Herein,we propose a promising solution by an inserting thin buffer layer(TBL) to strengthen the adhesion between CFL and separator as a double modifying layer(C-TBL) of the LMBs separator,which greatly improves the stability of the CFL and provides an effective Li metal anode protection.Owing to the sufficient ionic conductivity,chemical stability and strong adhesion to the separator of the TBL,it can avoid the failure of the CFL functionality with small interface impedance.Moreover,the CFL effectively reduces localized flux of Li+ through its abundant pores.The Li/Li cell with C-TBL separator displays the Li dendrite-free and stable cycling performance for at least 1500 h.When LiFePO_(4)(LFP) is employed as the cathode electrode,the assembled full cell with C-TBL separator shows the excellent rate performance and outstanding cycling capability.Our study builds a stable Li+conducting "bridge" between the functional layer and the separator in stabilizing Li metal anode,and provides a fresh idea of the artificial separator of LMBs. 展开更多
关键词 Dendrite-free metal anodes Lithium metal protection SEPARATOR Lithium-metal rechargeable battery Lithium fluoride
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MXenes for metal-ion and metal-sulfur batteries:Synthesis,properties,and electrochemistry 被引量:1
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作者 Siyang Liu Zihui Song +3 位作者 Xin Jin Runyue Mao Tianpeng Zhang Fangyuan Hu 《Materials Reports(Energy)》 2022年第1期17-40,共24页
In 2011,a new class of 2D materials was discovered;after 2012,they began to be concerned;in 2017,the“gold rush”of the materials was triggered,and they are exactly MXenes.2D MXenes,a new class of transition metal car... In 2011,a new class of 2D materials was discovered;after 2012,they began to be concerned;in 2017,the“gold rush”of the materials was triggered,and they are exactly MXenes.2D MXenes,a new class of transition metal carbides,carbonitrides and nitrides,have become the star and cutting-edge research materials in the field of emerging batteries systems due to their unique 2D structure,abundant surface chemistry,and excellent physical and electrochemical properties.This review focuses on the MXene materials and summarizes the recent advancements in the synthesis techniques and properties,in addition to a detailed discussion on the electrochemical energy storage applications,including alkali-ion(Li^(+),Na^(+),K^(+))storage,lithium-sulfur(Li–S)batteries,sodiumsulfur(Na–S)batteries,and metal anode protection.Special attentions are given to the elaborate design of nano-micro structures of MXenes for the various roles as electrodes,multifunctional components,S hosts,modified separators,and metal anode protective layers.The paper ends with a prospective summary of the promising research directions in terms of synthesis,structure,properties,analysis,and production on MXene materials. 展开更多
关键词 MXenes Electrochemical energy storage Lithium-ion battery Sodium-ion battery Lithium-sulfur battery Sodium-sulfur battery Metal anode protective layer Modified separator
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MXene derivative Ta_(4)C_(3)-Ta_(2)O_(5) heterostructure as bi-functional barrier for Li-S batteries 被引量:1
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作者 Qi Liang Sizhe Wang +6 位作者 Xiaohua Jia Jin Yang Yong Li Dan Shao Lei Feng Jiaxuan Liao Haojie Song 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第20期89-98,共10页
The shuttle effect of polysulfides during the charging and discharging of lithium-sulfur(Li-S)batteries and the growth of Li dendrites are crucial obstacles to hinder the commercialization of Li-S batteries.Heterostru... The shuttle effect of polysulfides during the charging and discharging of lithium-sulfur(Li-S)batteries and the growth of Li dendrites are crucial obstacles to hinder the commercialization of Li-S batteries.Heterostructure engineering is an effective strategy to accelerate catalytic conversion and suppress the dissolution of polysulfides.Herein,we report a Ta_(4)C_(3)-Ta_(2)O_(5) heterostructure composite as a bi-functional modified separator that not only achieves effective protection for lithium metal but also accelerates the polysulfides redox kinetics process.This heterostructure possesses efficient chemical anchoring and abundant active sites to immobilize polysulfides by synergistic effect,which endows a stable long cycling performance for Li-S batteries.This corresponds to an initial high capacity of 801.9 mAh g^(–1) at 1 C with a decay rate of 0.086%for 500 cycles.Due to its high Young’s modulus(up to 384 GPa),Ta_(4)C_(3) contributes to forming a protective layer on the Li metal surface to inhibit the growth of Li dendrites.Accordingly,the symmetrical cell has a stable overpotential for 700 cycles at 20 mA cm^(–2)/20 mAh cm^(–2).So,this“one stone two birds”design affords a novel perspective for high-energy Li-S battery storage system design and Li metal protection. 展开更多
关键词 MXene Ta_(4)C_(3) Ta_(2)O_(5) Lithium-sulfur batteries Li metal protection
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Interface issues of lithium metal anode for high-energy batteries: Challenges, strategies, and perspectives 被引量:21
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作者 Yiyao Han Bo Liu +6 位作者 Zhen Xiao Wenkui Zhang Xiuli Wang Guoxiang Pan Yang Xia Xinhui Xia Jiangping Tu 《InfoMat》 SCIE CAS 2021年第2期155-174,共20页
Lithium(Li)metal is considered as one of the most promising anode materials for next-generation high-energy-density storage systems.However,the practical application of Li metal anode is hindered by interfacial instab... Lithium(Li)metal is considered as one of the most promising anode materials for next-generation high-energy-density storage systems.However,the practical application of Li metal anode is hindered by interfacial instability and air instability due to the highly reactivity of Li metal.Unstable interface in Li metal batteries(LMBs)directly dictates Li dendrite growth,“dead Li”and low Coulombic efficiency,resulting in inferior electrochemical performance of LMBs and even safety issues.In addition,its sensitivity to ambient air leads to the severe corrosion of Li metal anode,high requirements of production and storage,and increased manufacturing cost.Plenty of efforts in recent years have overcome many bottlenecks in these fields and hastened the practical applications of high-energy-density LMBs.In this review,we focus on emerging methods of these two aspects to fulfill a stable and low cost electrode.In this perspective,design artificial solid electrolyte interphase(SEI)layers,construct three-dimensional conductive current collectors,optimize electrolytes,employ solid-state electrolytes,and modify separators are summarized to be propitious to ameliorate interfacial stability.Meanwhile,ex situ/in situ formed protective layers are highlighted in favor of heightening air stability.Finally,several possible directions for the future research on advanced Li metal anode are addressed. 展开更多
关键词 air stability artificial layer interfacial stability Li metal protection lithium metal anode
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Electrical and Corrosion Properties of Titanium Aluminum Nitride Thin Films Prepared by Plasma-Enhanced Atomic Layer Deposition
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作者 Eun-Young Yun Woo-Jae Lee +1 位作者 Qi Min Wang Se-Hun Kwon 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2017年第3期295-299,共5页
Titanium-aluminum-nitride(TiAlN) films were grown by plasma-enhanced atomic layer deposition(PEALD)on 316 L stainless steel at a deposition temperature of 200 °C. A supercycle, consisting of one AlN and ten T... Titanium-aluminum-nitride(TiAlN) films were grown by plasma-enhanced atomic layer deposition(PEALD)on 316 L stainless steel at a deposition temperature of 200 °C. A supercycle, consisting of one AlN and ten TiN subcycles, was used to prepare TiAlN films with a chemical composition of Ti(0.25)Al(0.25)N(0.50). The addition of AlN to TiN resulted in an increased electrical resistivity of TiAlN films of 2800 μΩ cm, compared with 475 μΩ cm of TiN films, mainly due to the high electrical resistivity of AlN and the amorphous structure of TiAlN. However, potentiostatic polarization measurements showed that amorphous TiAlN films exhibited excellent corrosion resistance with a corrosion current density of 0.12 μA/cm^2, about three times higher than that of TiN films, and about 12.5 times higher than that of 316 L stainless steel. 展开更多
关键词 Titanium-aluminum nitride Plasma-enhanced atomic layer deposition Corrosion protection Ternary transition metal nitrides
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