LiMn_(2)O_(4)(LMO) represents one of the most prevalent cathode materials utilized in lithium-ion batteries(LIBs), yet its broader application is often hampered by its limited achievable capacity and significant capac...LiMn_(2)O_(4)(LMO) represents one of the most prevalent cathode materials utilized in lithium-ion batteries(LIBs), yet its broader application is often hampered by its limited achievable capacity and significant capacity degradation during cycling. In this work, a novel dual-doping strategy involving Al^(3+) and Zr^(4+) ions has been employed to refine the atomic structure of LMO's spinel framework. The resultant dual-doped material, Li_(1.06)Mn_(1.97)Zr_(0.01)Al_(0.02)O_(4), exhibits enhanced electrochemical properties, boasting a discharge capacity of 124.9 m Ah/g at a rate of 0.1 C. Furthermore, the formation of stronger Al–O and Zr–O bonds contributes to the stabilization of the delithiated LMO structure. Impressively, 97.7%of its initial capacity is retained after 100 cycles at a 5 C rate. Additionally, enhancements in rate performance and hightemperature cycling stability have also been observed. This study underscores the potential of Al^(3+) and Zr^(4+) dual-doping as a promising approach to enhance LMO cathodes, providing a scalable and efficient means of improving the performance of lithium manganese oxide cathode materials through the incorporation of multiple ions.展开更多
Zeolitic imidazolate framework-8(ZIF-8)is a typical filler used to fabricate mixed matrix membranes(MMMs)on account of its attractive advantage of high selective permeability for gas separation.However,the performance...Zeolitic imidazolate framework-8(ZIF-8)is a typical filler used to fabricate mixed matrix membranes(MMMs)on account of its attractive advantage of high selective permeability for gas separation.However,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,However,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,which will lead to a decrease of selectivity and the performance of gas separation will be strongly influenced.Herein,we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH_(2),Kapton polyamide acid was selected as the polymer matrix.Results showed that the ZIF-8-NH_(2)/Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging,even the filler loading up to 45%(mass).The 45%(mass)of ZIF-8-NH_(2)/Kapton membrane showed 297 barrer(1 barrer=10^(-10)10 cm^(3)·cm·cm^(-2)·s^(-1)·cmHg^(-1),1 cmHg=1333.22 Pa,standard temperature and pressure)of the permeability of H_(2)and 43.9 and 62.2 of selectivities for H_(2)/N_(2)and for H_(2)/CH_(4),respectively,which are beyond the upper limit of Robeson 2008.展开更多
An 8-week feeding trial was conducted to investigate the effects of replacing dietary fish oil(FO)with black soldier fly larval oil(BSFO)on growth performance,antioxidant and immune response,lipid metabolism and mitoc...An 8-week feeding trial was conducted to investigate the effects of replacing dietary fish oil(FO)with black soldier fly larval oil(BSFO)on growth performance,antioxidant and immune response,lipid metabolism and mitochondrial function of the juvenile mud crab.A total of 160 mud crabs(18.58±0.02 g)were randomly distributed into five treatments spread across 160 aquaria.There were 4 replicates per treatment and 8 crabs per replicate.The basal diet(Control)contained 3%fish oil and fish oil was replaced with BSFO at 25%,50%,75%,and 100%in the remaining four treatments.The results showed that when the proportion of BSFO replacing FO was less than 50%,there were no significant differences in percent weight gain(PWG),specific growth rate(SGR)and feed efficiency(FE)between the experimental and the control groups(P>0.05);however,PWG and SGR decreased as the percentage of substitution increased from 50%to 100%(P<0.01).When the percentage of substitution was less than 50%,the expression levels of genes related to lipid synthesis and catabolism were significantly upregulated and down-regulated,respectively(P<0.05).When 25%and 50%FO were replaced with BSFO,the antioxidant and immune responses enhanced(P<0.05),and antioxidant and immune-related enzyme activities and metabolite concentrations in the hemolymph and hepatopancreas significantly increased(P<0.05),and the concentrations of malondialdehyde(MDA)and protein carbonyl(PC),and the apoptosis index in the hepatopancreas significantly decreased(P<0.05).Moreover,mitochondrial function indexes in the hepatopancreas,such as mitochondrial DNA copy number and expression levels of energy metabolism-related genes were significantly up-regulated(P<0.05).Hepatopancreas mitochondria were more abundant in crabs fed diets with 25%and 50%replacement of FO with BSFO,while adenosine triphosphate content was the highest in 25%FO replacement group(P=0.003).In summary,the results of the present study demonstrated that the replacement of FO with BSFO at less than 50%(i.e.in-feed BSFO level of 1.5%)did not negatively affect the growth performance of mud crabs,and could improve the antioxidant capacity,immune response,and enhance mitochondrial function.展开更多
基金Project supported by the National Key Research and Development Program of China (Grant No. 2022YFB2404400)。
文摘LiMn_(2)O_(4)(LMO) represents one of the most prevalent cathode materials utilized in lithium-ion batteries(LIBs), yet its broader application is often hampered by its limited achievable capacity and significant capacity degradation during cycling. In this work, a novel dual-doping strategy involving Al^(3+) and Zr^(4+) ions has been employed to refine the atomic structure of LMO's spinel framework. The resultant dual-doped material, Li_(1.06)Mn_(1.97)Zr_(0.01)Al_(0.02)O_(4), exhibits enhanced electrochemical properties, boasting a discharge capacity of 124.9 m Ah/g at a rate of 0.1 C. Furthermore, the formation of stronger Al–O and Zr–O bonds contributes to the stabilization of the delithiated LMO structure. Impressively, 97.7%of its initial capacity is retained after 100 cycles at a 5 C rate. Additionally, enhancements in rate performance and hightemperature cycling stability have also been observed. This study underscores the potential of Al^(3+) and Zr^(4+) dual-doping as a promising approach to enhance LMO cathodes, providing a scalable and efficient means of improving the performance of lithium manganese oxide cathode materials through the incorporation of multiple ions.
基金funded by National Natural Science Foundation of China(22278023)Beijing Municipal Science and Technology Planning Project(Z221100002722002)+1 种基金Beijing Natural Science Foundation(2222015)the long-term from the Ministry of Finance and the Ministry of Education of China.
文摘Zeolitic imidazolate framework-8(ZIF-8)is a typical filler used to fabricate mixed matrix membranes(MMMs)on account of its attractive advantage of high selective permeability for gas separation.However,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,However,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,which will lead to a decrease of selectivity and the performance of gas separation will be strongly influenced.Herein,we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH_(2),Kapton polyamide acid was selected as the polymer matrix.Results showed that the ZIF-8-NH_(2)/Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging,even the filler loading up to 45%(mass).The 45%(mass)of ZIF-8-NH_(2)/Kapton membrane showed 297 barrer(1 barrer=10^(-10)10 cm^(3)·cm·cm^(-2)·s^(-1)·cmHg^(-1),1 cmHg=1333.22 Pa,standard temperature and pressure)of the permeability of H_(2)and 43.9 and 62.2 of selectivities for H_(2)/N_(2)and for H_(2)/CH_(4),respectively,which are beyond the upper limit of Robeson 2008.
基金supported by National Key R.&D.Program of China(2023YFD2402000)National Natural Science Foundation of China(32072987)+2 种基金Earmarked fund for CARS(CARS-48)Nature Science Foundation of Zhejiang Province(LQ20C190005)Joint Fund for regional innovation and development of National Natural Science Foundation of China,and K.C.Wong Magna Fund in Ningbo University.
文摘An 8-week feeding trial was conducted to investigate the effects of replacing dietary fish oil(FO)with black soldier fly larval oil(BSFO)on growth performance,antioxidant and immune response,lipid metabolism and mitochondrial function of the juvenile mud crab.A total of 160 mud crabs(18.58±0.02 g)were randomly distributed into five treatments spread across 160 aquaria.There were 4 replicates per treatment and 8 crabs per replicate.The basal diet(Control)contained 3%fish oil and fish oil was replaced with BSFO at 25%,50%,75%,and 100%in the remaining four treatments.The results showed that when the proportion of BSFO replacing FO was less than 50%,there were no significant differences in percent weight gain(PWG),specific growth rate(SGR)and feed efficiency(FE)between the experimental and the control groups(P>0.05);however,PWG and SGR decreased as the percentage of substitution increased from 50%to 100%(P<0.01).When the percentage of substitution was less than 50%,the expression levels of genes related to lipid synthesis and catabolism were significantly upregulated and down-regulated,respectively(P<0.05).When 25%and 50%FO were replaced with BSFO,the antioxidant and immune responses enhanced(P<0.05),and antioxidant and immune-related enzyme activities and metabolite concentrations in the hemolymph and hepatopancreas significantly increased(P<0.05),and the concentrations of malondialdehyde(MDA)and protein carbonyl(PC),and the apoptosis index in the hepatopancreas significantly decreased(P<0.05).Moreover,mitochondrial function indexes in the hepatopancreas,such as mitochondrial DNA copy number and expression levels of energy metabolism-related genes were significantly up-regulated(P<0.05).Hepatopancreas mitochondria were more abundant in crabs fed diets with 25%and 50%replacement of FO with BSFO,while adenosine triphosphate content was the highest in 25%FO replacement group(P=0.003).In summary,the results of the present study demonstrated that the replacement of FO with BSFO at less than 50%(i.e.in-feed BSFO level of 1.5%)did not negatively affect the growth performance of mud crabs,and could improve the antioxidant capacity,immune response,and enhance mitochondrial function.
