In order to obtain the crystalline forms of the salts of the potassium,ammonium,calcium coexisting chloride system,the phase equilibria relationship of quaternary system K^(+),NH_(4)^(+),Ca^(2+)//Cl^(-)-H_(2)O at 298....In order to obtain the crystalline forms of the salts of the potassium,ammonium,calcium coexisting chloride system,the phase equilibria relationship of quaternary system K^(+),NH_(4)^(+),Ca^(2+)//Cl^(-)-H_(2)O at 298.2,323.2,and 348.2 K was studied by isothermal dissolution equilibrium method.The solubility and density of equilibrium liquid phases of the system were experimentally determined;X-ray powder diffractometer was used to determine the compositions of the equilibrium solid phase at the quaternary invariant point.It is found that the quaternary system is a complex system at these three temperatures.The phase diagram at 298.2 K consists of three invariant points,seven univariate curves and five crystalline phase regions,forming the solid solutions(NH_(4)Cl)_(x)(KCl)_(1-x) and(KCl)_(x)(NH_(4)Cl)_(1-x);while at 323.2 and 348.2 K the phase diagram consists of five invariant points,eleven univariate curves and seven crystalline phase regions,the double salts(KClCaCl_(2))and(2NH_(4)Cl·CaCl_(2)·3H_(2)O),solid solutions(KCl)_(x)(NH_(4)Cl)_(1-x) and(NH_(4)Cl)_(x)(KCl)_(1-x) were formed.Among them,the crystalline phase region of solid solution(KCl)_(x)(NH_(4)Cl)_(1-x) is the largest at three temperatures,indicating that it is the easiest to crystallize in this system.Comparing the phase diagrams of the quaternary system at 298.2,323.2,and 348.2 K,it can be seen that the crystalline form of CaCl_(2) changes with the increase of temperature:CaCl_(2)·6H_(2)O at 298.2 K,CaCl_(2)·2H_(2)O at 323.2 and 348.2 K.From 323.2 to 348.2 K,the crystalline phase regions of(KCl·CaCl_(2))and(2NH_(4)Cl·CaCl_(2)·3H_(2)O)increased gradually.展开更多
The application of industrial solid wastes as environmentally functional materials for air pollutants control has gained much attention in recent years due to its potential to reduce air pollution in a cost-effective ...The application of industrial solid wastes as environmentally functional materials for air pollutants control has gained much attention in recent years due to its potential to reduce air pollution in a cost-effective manner.In this review,we investigate the development of industrialwaste-based functional materials for various gas pollutant removal and consider the relevant reaction mechanism according to different types of industrial solid waste.We see a recent effort towards achieving high-performance environmental functional materials via chemical or physical modification,in which the active components,pore size,and phase structure can be altered.The review will discuss the potential of using industrial solid wastes,these modified materials,or synthesized materials from raw waste precursors for the removal of air pollutants,including SO_(2),NO_(x),Hg^(0),H_(2)S,VOCs,and CO_(2).The challenges still need to be addressed to realize this potential and the prospects for future research fully.The suggestions for future directions include determining the optimal composition of these materials,calculating the real reaction rate and turnover frequency,developing effective treatment methods,and establishing chemical component databases of raw industrial solid waste for catalysts/adsorbent preparation.展开更多
Protonic solid oxide electrolysis cells(P-SOECs)are a promising technology for water electrolysis to produce green hydrogen.However,there are still challenges related key materials and anode/electrolyte interface.P-SO...Protonic solid oxide electrolysis cells(P-SOECs)are a promising technology for water electrolysis to produce green hydrogen.However,there are still challenges related key materials and anode/electrolyte interface.P-SOECs with Zr-rich electrolyte,called Zr-rich side P-SOECs,possess high thermodynamically stability under high steam concentrations but the large reaction resistances and the current leakage,thus the inferior performances.In this study,an efficient functional interlayer Ba_(0.95)La_(0.05)Fe_(0.8)Zn_(0.2)O_(3-δ)(BLFZ)in-between the anode and the electrolyte is developed.The electrochemical performances of P-SOECs are greatly enhanced because the BLFZ can greatly increase the interface contact,boost anode reaction kinetics,and increase proton injection into electrolyte.As a result,the P-SOEC yields high current density of 0.83 A cm^(-2) at 600℃ in 1.3 Vamong all the reported Zr-rich side cells.This work not only offers an efficient functional interlayer for P-SOECs but also holds the potential to achieve P-SOECs with high performances and long-term stability.展开更多
Solid oxide cells(SOCs)are emerging devices for efficient energy storage and conversion.However,during SOC operation,gaseous chromium(Cr)species released from Fe-Cr alloy interconnect can lead to Cr deposition and poi...Solid oxide cells(SOCs)are emerging devices for efficient energy storage and conversion.However,during SOC operation,gaseous chromium(Cr)species released from Fe-Cr alloy interconnect can lead to Cr deposition and poisoning of air electrodes,causing substantial degradation in electrochemical performance and compromising the longterm stability of SOCs.This mini-review examines the mechanism of Cr deposition and poisoning in air electrodes under both fuel-cell and electrolysis modes.Furthermore,emphasis is placed on the recent advancements in strategies to mitigate Cr poisoning,offering insights into the rational design and development of active and Cr-tolerant air electrodes for SOCs.展开更多
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
As global energy demand increases and environmental standards tighten,the development of efficient,eco-friendly energy conversion and storage technologies becomes crucial.Solid oxide cells(SOCs)show great promise beca...As global energy demand increases and environmental standards tighten,the development of efficient,eco-friendly energy conversion and storage technologies becomes crucial.Solid oxide cells(SOCs)show great promise because of their high energy conversion efficiency and wide range of applications.Highentropy materials(HEMs),a novel class of materials comprising several principal elements,have attracted significant interest within the materials science and energy sectors.Their distinctive structural features and adaptable functional properties offer immense potential for innovation across various applications.This review systematically covers the basic concepts,crystal structures,element selection,and major synthesis strategies of HEMs,and explores in detail the specific applications of these materials in SOCs,including its potential as air electrodes,fuel electrodes,electrolytes,and interconnects(including barrier coatings).By analyzing existing studies,this review reveals the significant advantages of HEMs in enhancing the performance,anti-poisoning,and stability of SOCs;highlights the key areas and challenges for future research;and looks into possible future directions.展开更多
All-solid-state Li batteries(ASSLBs)using solid electrolytes(SEs)have gained significant attention in recent years considering the safety issue and their high energy density.Despite these advantages,the commercializat...All-solid-state Li batteries(ASSLBs)using solid electrolytes(SEs)have gained significant attention in recent years considering the safety issue and their high energy density.Despite these advantages,the commercialization of ASSLBs still faces challenges regarding the electrolyte/electrodes interfaces and growth of Li dendrites.Elemental doping is an effective and direct method to enhance the performance of SEs.Here,we report an Al-F co-doping strategy to improve the overall properties including ion conductivity,high voltage stability,and cathode and anode compatibility.Particularly,the Al-F co-doping enables the formation of a thin Li-Al alloy layer and fluoride interphases,thereby constructing a relatively stable interface and promoting uniform Li deposition.The similar merits of Al-F co-doping are also revealed in the Li-argyrodite series.ASSLBs assembled with these optimized electrolytes gain good electrochemical performance,demonstrating the universality of Al-F co-doping towards advanced SEs.展开更多
Objective Burning solid cooking fuel contributes to household air pollution and is associated with frailty.However,how solid cooking fuel use contributes to the development of frailty has not been well illustrated.Met...Objective Burning solid cooking fuel contributes to household air pollution and is associated with frailty.However,how solid cooking fuel use contributes to the development of frailty has not been well illustrated.Methods This study recruited 8,947 participants aged≥45 years from the China Health and Retirement Longitudinal Study,2011–2018.Group-based trajectory modeling was employed to identify frailty trajectories.Multinomial logistic regression was used to assess the association between solid cooking fuel use and frailty trajectories.Population-attributable fractions were used to estimate the frailty burden from solid fuel use.Results We identified three frailty trajectories:low-stable(n=5,789),moderate-increasing(n=2,603),and fast-increasing(n=555).Solid fuel use was associated with higher odds of being in the moderate-increasing(OR:1.24,95%CI:1.08–1.42)and fast-increasing(OR:1.48,95%CI:1.14–1.92)trajectories.These associations were strengthened by longer solid fuel use(P for trend<0.001).Switching to clean fuel significantly reduced the risk of being in these trajectories compared with persistent solid fuel users.Without solid fuel,8%of moderate-and 19%of fast-increasing trajectories demonstrated frailty development like the low-stable group.Conclusion Solid cooking fuel use is associated with frailty trajectories in middle-aged and older Chinese populations.展开更多
基金Supported by the National Key Research and Development Program of China(2023YFC2906503)Sichuan Province Science and Technology Support Program(2023ZYD0036).
文摘In order to obtain the crystalline forms of the salts of the potassium,ammonium,calcium coexisting chloride system,the phase equilibria relationship of quaternary system K^(+),NH_(4)^(+),Ca^(2+)//Cl^(-)-H_(2)O at 298.2,323.2,and 348.2 K was studied by isothermal dissolution equilibrium method.The solubility and density of equilibrium liquid phases of the system were experimentally determined;X-ray powder diffractometer was used to determine the compositions of the equilibrium solid phase at the quaternary invariant point.It is found that the quaternary system is a complex system at these three temperatures.The phase diagram at 298.2 K consists of three invariant points,seven univariate curves and five crystalline phase regions,forming the solid solutions(NH_(4)Cl)_(x)(KCl)_(1-x) and(KCl)_(x)(NH_(4)Cl)_(1-x);while at 323.2 and 348.2 K the phase diagram consists of five invariant points,eleven univariate curves and seven crystalline phase regions,the double salts(KClCaCl_(2))and(2NH_(4)Cl·CaCl_(2)·3H_(2)O),solid solutions(KCl)_(x)(NH_(4)Cl)_(1-x) and(NH_(4)Cl)_(x)(KCl)_(1-x) were formed.Among them,the crystalline phase region of solid solution(KCl)_(x)(NH_(4)Cl)_(1-x) is the largest at three temperatures,indicating that it is the easiest to crystallize in this system.Comparing the phase diagrams of the quaternary system at 298.2,323.2,and 348.2 K,it can be seen that the crystalline form of CaCl_(2) changes with the increase of temperature:CaCl_(2)·6H_(2)O at 298.2 K,CaCl_(2)·2H_(2)O at 323.2 and 348.2 K.From 323.2 to 348.2 K,the crystalline phase regions of(KCl·CaCl_(2))and(2NH_(4)Cl·CaCl_(2)·3H_(2)O)increased gradually.
基金supported by National Natural Science Foundation of China(Grant No.52270106 and 22266021)Yunnan Major Scientific and Technological Projects(grant No.202202AG050005)Yunnan Fundamental Research Projects(grant No.202201AT070116).
文摘The application of industrial solid wastes as environmentally functional materials for air pollutants control has gained much attention in recent years due to its potential to reduce air pollution in a cost-effective manner.In this review,we investigate the development of industrialwaste-based functional materials for various gas pollutant removal and consider the relevant reaction mechanism according to different types of industrial solid waste.We see a recent effort towards achieving high-performance environmental functional materials via chemical or physical modification,in which the active components,pore size,and phase structure can be altered.The review will discuss the potential of using industrial solid wastes,these modified materials,or synthesized materials from raw waste precursors for the removal of air pollutants,including SO_(2),NO_(x),Hg^(0),H_(2)S,VOCs,and CO_(2).The challenges still need to be addressed to realize this potential and the prospects for future research fully.The suggestions for future directions include determining the optimal composition of these materials,calculating the real reaction rate and turnover frequency,developing effective treatment methods,and establishing chemical component databases of raw industrial solid waste for catalysts/adsorbent preparation.
基金financial support from the JSPS KAKENHI Grant-in-Aid for Scientific Research(B),No.21H02035KAKENHI Grant-in-Aid for Challenging Research(Exploratory),No.21K19017+2 种基金KAKENHI Grant-in-Aid for Transformative Research Areas(B),No.21H05100National Natural Science Foundation of China,No.22409033 and No.22409035Basic and Applied Basic Research Foundation of Guangdong Province,No.2022A1515110470.
文摘Protonic solid oxide electrolysis cells(P-SOECs)are a promising technology for water electrolysis to produce green hydrogen.However,there are still challenges related key materials and anode/electrolyte interface.P-SOECs with Zr-rich electrolyte,called Zr-rich side P-SOECs,possess high thermodynamically stability under high steam concentrations but the large reaction resistances and the current leakage,thus the inferior performances.In this study,an efficient functional interlayer Ba_(0.95)La_(0.05)Fe_(0.8)Zn_(0.2)O_(3-δ)(BLFZ)in-between the anode and the electrolyte is developed.The electrochemical performances of P-SOECs are greatly enhanced because the BLFZ can greatly increase the interface contact,boost anode reaction kinetics,and increase proton injection into electrolyte.As a result,the P-SOEC yields high current density of 0.83 A cm^(-2) at 600℃ in 1.3 Vamong all the reported Zr-rich side cells.This work not only offers an efficient functional interlayer for P-SOECs but also holds the potential to achieve P-SOECs with high performances and long-term stability.
基金supported by National Natural Science Foundation of China(22279018)National Natural Science Foundation of China(22005055)Natural Science Foundation of Fujian Province(2022J01085).
文摘Solid oxide cells(SOCs)are emerging devices for efficient energy storage and conversion.However,during SOC operation,gaseous chromium(Cr)species released from Fe-Cr alloy interconnect can lead to Cr deposition and poisoning of air electrodes,causing substantial degradation in electrochemical performance and compromising the longterm stability of SOCs.This mini-review examines the mechanism of Cr deposition and poisoning in air electrodes under both fuel-cell and electrolysis modes.Furthermore,emphasis is placed on the recent advancements in strategies to mitigate Cr poisoning,offering insights into the rational design and development of active and Cr-tolerant air electrodes for SOCs.
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.
基金supported by the National Key R&D Program of China(2022YFB4004000)National Natural Science Foundation of China(U24A20542,52472210,22279057)+3 种基金Natural Science Foundation of Jiangsu Province(BK20221312)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX23_1465)Cultivation Program for the Excellent Doctoral Dissertation of Nanjing Tech University(2023-09)the grant of Hydrogen Energy Laboratory(No.FEUZ-2024-0009)。
文摘As global energy demand increases and environmental standards tighten,the development of efficient,eco-friendly energy conversion and storage technologies becomes crucial.Solid oxide cells(SOCs)show great promise because of their high energy conversion efficiency and wide range of applications.Highentropy materials(HEMs),a novel class of materials comprising several principal elements,have attracted significant interest within the materials science and energy sectors.Their distinctive structural features and adaptable functional properties offer immense potential for innovation across various applications.This review systematically covers the basic concepts,crystal structures,element selection,and major synthesis strategies of HEMs,and explores in detail the specific applications of these materials in SOCs,including its potential as air electrodes,fuel electrodes,electrolytes,and interconnects(including barrier coatings).By analyzing existing studies,this review reveals the significant advantages of HEMs in enhancing the performance,anti-poisoning,and stability of SOCs;highlights the key areas and challenges for future research;and looks into possible future directions.
基金supported by the National Natural Science Foundation of China(Nos.52172243,52371215)。
文摘All-solid-state Li batteries(ASSLBs)using solid electrolytes(SEs)have gained significant attention in recent years considering the safety issue and their high energy density.Despite these advantages,the commercialization of ASSLBs still faces challenges regarding the electrolyte/electrodes interfaces and growth of Li dendrites.Elemental doping is an effective and direct method to enhance the performance of SEs.Here,we report an Al-F co-doping strategy to improve the overall properties including ion conductivity,high voltage stability,and cathode and anode compatibility.Particularly,the Al-F co-doping enables the formation of a thin Li-Al alloy layer and fluoride interphases,thereby constructing a relatively stable interface and promoting uniform Li deposition.The similar merits of Al-F co-doping are also revealed in the Li-argyrodite series.ASSLBs assembled with these optimized electrolytes gain good electrochemical performance,demonstrating the universality of Al-F co-doping towards advanced SEs.
基金supported by the National Natural Science Foundation of China(82222064,81973147)the National Key Research and Development Program(2022YFC2010100)the Shandong University Distinguished Young Scholars。
文摘Objective Burning solid cooking fuel contributes to household air pollution and is associated with frailty.However,how solid cooking fuel use contributes to the development of frailty has not been well illustrated.Methods This study recruited 8,947 participants aged≥45 years from the China Health and Retirement Longitudinal Study,2011–2018.Group-based trajectory modeling was employed to identify frailty trajectories.Multinomial logistic regression was used to assess the association between solid cooking fuel use and frailty trajectories.Population-attributable fractions were used to estimate the frailty burden from solid fuel use.Results We identified three frailty trajectories:low-stable(n=5,789),moderate-increasing(n=2,603),and fast-increasing(n=555).Solid fuel use was associated with higher odds of being in the moderate-increasing(OR:1.24,95%CI:1.08–1.42)and fast-increasing(OR:1.48,95%CI:1.14–1.92)trajectories.These associations were strengthened by longer solid fuel use(P for trend<0.001).Switching to clean fuel significantly reduced the risk of being in these trajectories compared with persistent solid fuel users.Without solid fuel,8%of moderate-and 19%of fast-increasing trajectories demonstrated frailty development like the low-stable group.Conclusion Solid cooking fuel use is associated with frailty trajectories in middle-aged and older Chinese populations.
