Objective:To evaluate the effect of preoperative dietary intervention on the gastrointestinal reaction of microparticle transcatheter arterial chemoembolization(TACE).Methods:A total of 60 patients with primary liver ...Objective:To evaluate the effect of preoperative dietary intervention on the gastrointestinal reaction of microparticle transcatheter arterial chemoembolization(TACE).Methods:A total of 60 patients with primary liver cancer who were treated in our hospital from January 2018 to October 2018 were selected for this study.The random sampling method was used to divide the patients into an intervention group(30 cases)and a control group(30 cases).The control group received routine intervention,whereas the intervention group received optimized nursing intervention.The incidence of gastrointestinal reactions,the vomiting frequency,the average vomiting volume,the incidence of stomach discomfort,the quality of life,and the anxiety and depression indicators of both groups were compared.Results:The results of all indicators of the intervention group were better than those of the control group.The incidence of gastrointestinal reactions in the intervention group was 13.9%,which was lower than 43.3%of the control group.The scores of QLQ-C30 of the intervention group were higher than those of the control group;the SAS and SDS scores in the intervention group were lower than those of the control group.Conclusion:Preoperative dietary intervention can reduce the incidence of gastrointestinal reactions of microparticle TACE and improve the symptoms of gastric discomfort among patients.展开更多
The development of high-performance layered oxide cathodes for sodium ion batteries (SIBs) continues to facing be hindered by severe challenges to date.Herein,a single-phase P2-Na0.67Mn0.6Ni0.2Co0.1Cu0.1O2(NMNCC) comp...The development of high-performance layered oxide cathodes for sodium ion batteries (SIBs) continues to facing be hindered by severe challenges to date.Herein,a single-phase P2-Na0.67Mn0.6Ni0.2Co0.1Cu0.1O2(NMNCC) comprising multiple-layer-oriented stacked nanoflakes is designed and synthesized via a simple sol-gel method.The large lattice parameters ensure a large three-dimensional frame,which enables the diffusion of sodium ions.Owing to its optimal morphology structure modulation transition metal substitution strategy,the MNCC electrode delivers a reversible capacity of 131.3 mAh g^-1 at 0.1 C with retention of 86.7%after 200 cycles.In addition,it provides an initial capacity of 86.7 mAh g^-1,and a retention of 80.0%after 500 cycles even at a current density of up to 1 A g^-1.The stable single-phase structure and slight volume shrinkage observed after Na+extraction further delay structural degradation.High Na+mobility and low Na+diffusion resistance are also guarantee the excellent rate performance of the NMNCC electrode.Thus,we determine that the NMNCC cathode is significant in the advancement of promising novel layered oxide cathodes.展开更多
Sodium-ion batteries(SIBs),which are an alternative to lithium-ion batteries(LIBs),have attracted increasing attention due to their low cost of Na resources and similar Na storage mechanism to LIBs.Compared with anode...Sodium-ion batteries(SIBs),which are an alternative to lithium-ion batteries(LIBs),have attracted increasing attention due to their low cost of Na resources and similar Na storage mechanism to LIBs.Compared with anode materials and electrolytes,the development of cathode materials lags behind.Therefore,the key to improving the specific energy and promoting the application of SIBs is to develop high-performance sodium intercalation cathode materials.Transition-metal oxides are one of the most promising cathode materials for SIBs owing to their excellent energy density,high specific discharge capacity,and environmentally friendly nature.In the present work,the latest progress in the research of transition-metal oxides is summarized.Moreover,the existing challenges are discussed,and a series of strategies are proposed to overcome these drawbacks.This review aims at providing guidance for the development of metal oxides in the next stage.展开更多
Currently,emerging battery technologies are being studied intensively.The lack of ideal electrode materials remains a key hindrance to further development of new batteries.The novel MXene material,due to its unique st...Currently,emerging battery technologies are being studied intensively.The lack of ideal electrode materials remains a key hindrance to further development of new batteries.The novel MXene material,due to its unique structural characteristics and physicochemical properties,shows the ability to enhance the electrochemical performance of the electrode.In addition to the adjustable layer spacing,because of excellent electrical conductivity,rich chemical composition,and controllable surface chemistry,MXene has the potential for use in diverse applications as an ideal electrode material in various battery systems.This review covers the recent progress achieved in research of the zinc-ion energy storage of MXenes,including MXene-based cathodes,MXenederived cathodes,MXene-modified zinc anodes,and electrolyte additives.Moreover,further structural design and reaction mechanisms of MXenes in zinc-ion storage are explored.展开更多
Silicon-based(Si)materials are promising anodes for lithium-ion batteries(LIBs)because of their ultrahigh theoretical capacity of 4200 mA h g^(−1).However,commercial applications of Si anodes have been hindered by the...Silicon-based(Si)materials are promising anodes for lithium-ion batteries(LIBs)because of their ultrahigh theoretical capacity of 4200 mA h g^(−1).However,commercial applications of Si anodes have been hindered by their drastic volume variation(∼300%)and low electrical conductivity.Here,to tackle the drawbacks,a hierarchical Si anode with double-layer coatings of a SiOx inner layer and a nitrogen(N),boron(B)co-doped carbon(C-NB)outer layer is elaborately designed by copyrolysis of Si-OH structures and a H3BO_(3)-doped polyaniline polymer on the Si surface.Compared with the pristine Si anodes(7mA h g^(−1) at 0.5 A g^(−1) after 340 cycles and 340 mA h g^(−1) at 5 A g^(−1)),the modified Si-based materials(Si@SiOx@C-NB nanospheres)present su perior cycling stability(reversible 1301 mA h g^(−1) at 0.5 A g^(−1) after 340 cycles)as well as excellent rate capability(690mA h g^(−1) at 5 A g^(−1))when used as anodes in LIBs.The unique double-layer coating structure,in which the inner amorphous SiOx layer acts as a buffer matrix and the outer defect-rich carbon enhances the electron diffusion of the whole anode,makes it possible to de liver excellent electrochemical properties.These results indicate that our double-layer coating strategy is a promising approach not only for the devel opment of sustainable Si anodes but also for the design of multielement-doped carbon nanomaterials.展开更多
Aqueous rechargeable zinc-ion hybrid supercapacitors are considered to be a promising candidate for large-scale energy storage devices owing to their high safety,long life,and low price.In this paper,a nitrogen doped ...Aqueous rechargeable zinc-ion hybrid supercapacitors are considered to be a promising candidate for large-scale energy storage devices owing to their high safety,long life,and low price.In this paper,a nitrogen doped hierarchical porous carbon is evaluated as the cathode for aqueous rechargeable zinc-ion hybrid supercapacitors.Benefiting from the synergistic merits of excellent structural features of N-HPC and tiny zinc dendrite of Zn anode in ZnSO4 electrolyte,the zinc-ion hybrid supercapacitor exhibits excellent energy storage performance including high capacity of 136.8 mAh·g^−1 at 0.1·Ag^−1,high energy density of 191 Wh·kg^−1,large power density of 3,633.4 W·kg^−1,and satisfactory cycling stability of up to 5,000 cycles with a capacity retention of 90.9%.This work presents a new prospect of developing high-performance aqueous rechargeable zinc ion energy storage devices.展开更多
Hybrid improper ferroelectric Ca3Ti2O7 and Ca3Tii 9RuO.iO7 ceramics were successfully synthesized by conventional solid-state reaction method.Two strongest diffraction peaks located around 2θ=33°shifted towards ...Hybrid improper ferroelectric Ca3Ti2O7 and Ca3Tii 9RuO.iO7 ceramics were successfully synthesized by conventional solid-state reaction method.Two strongest diffraction peaks located around 2θ=33°shifted towards the lower angle region with Ru substitution,reflecting structure variation.Grain growth and higher oxygen vacancy concentration after doping resulted in a reduction in the coercive field about 20 kV/cm.Optical bandgap estimated by UV-vis diffuse reflectance(DR)spectrum and X-ray photoelectron spectroscopy(XPS)valence band spectra showed a decreasing trend due to the existence of impurity energy level upon Ru doping,which was consistent with the results of first-principles calculations.The origin of the unexpected induced magnetic moments in Ru-dope Ca3Ti2O7 is also discussed.展开更多
Recent advances in material design for organic solar cells(OSCs)are primarily focused on developing near-infrared nonfullerene acceptors,typically A-DA′D-A type acceptors(where A abbreviates an electron-withdrawing m...Recent advances in material design for organic solar cells(OSCs)are primarily focused on developing near-infrared nonfullerene acceptors,typically A-DA′D-A type acceptors(where A abbreviates an electron-withdrawing moiety and D,an electron-donor moiety),to achieve high external quantum efficiency while maintaining low voltage loss.However,the charge transport is still constrained by unfavorable molecular conformations,resulting in high energetic disorder and limiting the device performance.Here,a facile design strategy is reported by introducing the"wing"(alkyl chains)at the terminal of the DA′D central core of the A-DA′D-A type acceptor to achieve a favorable and ordered molecular orientation and therefore facilitate charge carrier transport.Benefitting from the reduced disorder,the electron mobilities could be significantly enhanced for the"wing"-containing molecules.By carefully changing the length of alkyl chains,the mobility of acceptor has been tuned to match with that of donor,leading to a minimized charge imbalance factor and a high fill factor(FF).We further provide useful design strategies for highly efficient OSCs with high FF.展开更多
文摘Objective:To evaluate the effect of preoperative dietary intervention on the gastrointestinal reaction of microparticle transcatheter arterial chemoembolization(TACE).Methods:A total of 60 patients with primary liver cancer who were treated in our hospital from January 2018 to October 2018 were selected for this study.The random sampling method was used to divide the patients into an intervention group(30 cases)and a control group(30 cases).The control group received routine intervention,whereas the intervention group received optimized nursing intervention.The incidence of gastrointestinal reactions,the vomiting frequency,the average vomiting volume,the incidence of stomach discomfort,the quality of life,and the anxiety and depression indicators of both groups were compared.Results:The results of all indicators of the intervention group were better than those of the control group.The incidence of gastrointestinal reactions in the intervention group was 13.9%,which was lower than 43.3%of the control group.The scores of QLQ-C30 of the intervention group were higher than those of the control group;the SAS and SDS scores in the intervention group were lower than those of the control group.Conclusion:Preoperative dietary intervention can reduce the incidence of gastrointestinal reactions of microparticle TACE and improve the symptoms of gastric discomfort among patients.
基金supported by the National Natural Science Foundation of China(No.21471162)the Hunan Provincial Science and Technology Plan Project(No.2017TP1001)Postgraduate Innovation project(No.502211822)。
文摘The development of high-performance layered oxide cathodes for sodium ion batteries (SIBs) continues to facing be hindered by severe challenges to date.Herein,a single-phase P2-Na0.67Mn0.6Ni0.2Co0.1Cu0.1O2(NMNCC) comprising multiple-layer-oriented stacked nanoflakes is designed and synthesized via a simple sol-gel method.The large lattice parameters ensure a large three-dimensional frame,which enables the diffusion of sodium ions.Owing to its optimal morphology structure modulation transition metal substitution strategy,the MNCC electrode delivers a reversible capacity of 131.3 mAh g^-1 at 0.1 C with retention of 86.7%after 200 cycles.In addition,it provides an initial capacity of 86.7 mAh g^-1,and a retention of 80.0%after 500 cycles even at a current density of up to 1 A g^-1.The stable single-phase structure and slight volume shrinkage observed after Na+extraction further delay structural degradation.High Na+mobility and low Na+diffusion resistance are also guarantee the excellent rate performance of the NMNCC electrode.Thus,we determine that the NMNCC cathode is significant in the advancement of promising novel layered oxide cathodes.
基金This study was supported by the National Natural Science Foundation of China(No.21471162)the Hunan Provincial Innovation Foundation for Post graduate(No.502211822).
文摘Sodium-ion batteries(SIBs),which are an alternative to lithium-ion batteries(LIBs),have attracted increasing attention due to their low cost of Na resources and similar Na storage mechanism to LIBs.Compared with anode materials and electrolytes,the development of cathode materials lags behind.Therefore,the key to improving the specific energy and promoting the application of SIBs is to develop high-performance sodium intercalation cathode materials.Transition-metal oxides are one of the most promising cathode materials for SIBs owing to their excellent energy density,high specific discharge capacity,and environmentally friendly nature.In the present work,the latest progress in the research of transition-metal oxides is summarized.Moreover,the existing challenges are discussed,and a series of strategies are proposed to overcome these drawbacks.This review aims at providing guidance for the development of metal oxides in the next stage.
基金This study was supported by the National Natural Science Foundation of China(No.:21471162)the Hunan Provincial Science and Technology Plan Project(No.:2017TP1001).
文摘Currently,emerging battery technologies are being studied intensively.The lack of ideal electrode materials remains a key hindrance to further development of new batteries.The novel MXene material,due to its unique structural characteristics and physicochemical properties,shows the ability to enhance the electrochemical performance of the electrode.In addition to the adjustable layer spacing,because of excellent electrical conductivity,rich chemical composition,and controllable surface chemistry,MXene has the potential for use in diverse applications as an ideal electrode material in various battery systems.This review covers the recent progress achieved in research of the zinc-ion energy storage of MXenes,including MXene-based cathodes,MXenederived cathodes,MXene-modified zinc anodes,and electrolyte additives.Moreover,further structural design and reaction mechanisms of MXenes in zinc-ion storage are explored.
基金supported by Joint Funds of the National Natural Science Foundation of China(U20A20280)the National Natural Science Foundation of China(21805083,52074119)+3 种基金the Academy of Sciences large apparatus United Fund of China(U1832187)the Scientific Research Fund of Hunan Provincial Education Department(19K058)the Science and Technology Planning Project of Hunan Province(2018TP1017)the High-Tech Leading Plan of Hunan Province(2020GK2072).
文摘Silicon-based(Si)materials are promising anodes for lithium-ion batteries(LIBs)because of their ultrahigh theoretical capacity of 4200 mA h g^(−1).However,commercial applications of Si anodes have been hindered by their drastic volume variation(∼300%)and low electrical conductivity.Here,to tackle the drawbacks,a hierarchical Si anode with double-layer coatings of a SiOx inner layer and a nitrogen(N),boron(B)co-doped carbon(C-NB)outer layer is elaborately designed by copyrolysis of Si-OH structures and a H3BO_(3)-doped polyaniline polymer on the Si surface.Compared with the pristine Si anodes(7mA h g^(−1) at 0.5 A g^(−1) after 340 cycles and 340 mA h g^(−1) at 5 A g^(−1)),the modified Si-based materials(Si@SiOx@C-NB nanospheres)present su perior cycling stability(reversible 1301 mA h g^(−1) at 0.5 A g^(−1) after 340 cycles)as well as excellent rate capability(690mA h g^(−1) at 5 A g^(−1))when used as anodes in LIBs.The unique double-layer coating structure,in which the inner amorphous SiOx layer acts as a buffer matrix and the outer defect-rich carbon enhances the electron diffusion of the whole anode,makes it possible to de liver excellent electrochemical properties.These results indicate that our double-layer coating strategy is a promising approach not only for the devel opment of sustainable Si anodes but also for the design of multielement-doped carbon nanomaterials.
基金This work was supported by the National Natural Science Foundation of China(No.21471162)the Hunan Provincial Science and Technology Plan Project(No.2017TP1001).
文摘Aqueous rechargeable zinc-ion hybrid supercapacitors are considered to be a promising candidate for large-scale energy storage devices owing to their high safety,long life,and low price.In this paper,a nitrogen doped hierarchical porous carbon is evaluated as the cathode for aqueous rechargeable zinc-ion hybrid supercapacitors.Benefiting from the synergistic merits of excellent structural features of N-HPC and tiny zinc dendrite of Zn anode in ZnSO4 electrolyte,the zinc-ion hybrid supercapacitor exhibits excellent energy storage performance including high capacity of 136.8 mAh·g^−1 at 0.1·Ag^−1,high energy density of 191 Wh·kg^−1,large power density of 3,633.4 W·kg^−1,and satisfactory cycling stability of up to 5,000 cycles with a capacity retention of 90.9%.This work presents a new prospect of developing high-performance aqueous rechargeable zinc ion energy storage devices.
基金the National Natural Science Foundation of China(51572193)the Natural Science Foundation of Tianjin(20JCZDJC00210).
文摘Hybrid improper ferroelectric Ca3Ti2O7 and Ca3Tii 9RuO.iO7 ceramics were successfully synthesized by conventional solid-state reaction method.Two strongest diffraction peaks located around 2θ=33°shifted towards the lower angle region with Ru substitution,reflecting structure variation.Grain growth and higher oxygen vacancy concentration after doping resulted in a reduction in the coercive field about 20 kV/cm.Optical bandgap estimated by UV-vis diffuse reflectance(DR)spectrum and X-ray photoelectron spectroscopy(XPS)valence band spectra showed a decreasing trend due to the existence of impurity energy level upon Ru doping,which was consistent with the results of first-principles calculations.The origin of the unexpected induced magnetic moments in Ru-dope Ca3Ti2O7 is also discussed.
基金supported by the National Key Research&Development Projects of China(2017YFA0206600)the National Natural Science Foundation of China(21875286)+2 种基金Science Fund for Distinguished Young Scholars of Hunan Province(2017JJ1029)InnovationDriven Project of Central South University(2020CX001)the Research Committee of HKBU(RC-ICRS/15-16/4A-SSK,FRG/16-17/077)。
文摘Recent advances in material design for organic solar cells(OSCs)are primarily focused on developing near-infrared nonfullerene acceptors,typically A-DA′D-A type acceptors(where A abbreviates an electron-withdrawing moiety and D,an electron-donor moiety),to achieve high external quantum efficiency while maintaining low voltage loss.However,the charge transport is still constrained by unfavorable molecular conformations,resulting in high energetic disorder and limiting the device performance.Here,a facile design strategy is reported by introducing the"wing"(alkyl chains)at the terminal of the DA′D central core of the A-DA′D-A type acceptor to achieve a favorable and ordered molecular orientation and therefore facilitate charge carrier transport.Benefitting from the reduced disorder,the electron mobilities could be significantly enhanced for the"wing"-containing molecules.By carefully changing the length of alkyl chains,the mobility of acceptor has been tuned to match with that of donor,leading to a minimized charge imbalance factor and a high fill factor(FF).We further provide useful design strategies for highly efficient OSCs with high FF.
