Aqueous rechargeable zinc batteries are very attractive for energy storage applications due to their low cost and high safety.However,low operating voltages limit their further development.For the first time,this work...Aqueous rechargeable zinc batteries are very attractive for energy storage applications due to their low cost and high safety.However,low operating voltages limit their further development.For the first time,this work proposes a unique approach to increase the voltages of aqueous zinc batteries by using tri-functional metallic bipolar electrode with good electrochemical activity and ultrahigh electronic conductivity,which not only participates in redox reactions,but also functions as an electrical highway for charge transport.Furthermore,bipolar electrode can replace expensive ion selective membrane to separate electrolytes with different pH;thus,redox couples with higher potential in acid condition and Zn=Zn(OH)^(2-)_(4) couple with lower potential in alkaline condition can be employed together,leading to high voltages of aqueous zinc batteries.Herein,two types of metallic bipolar electrodes of Cu and Ag are utilized based on three kinds of aqueous zinc batteries:Zn–MnO_(2),Zn–I_(2),and Zn–Br_(2).The voltage of aqueous Zn–MnO_(2) battery is raised to 1.84 V by employing one Cu bipolar electrode,which shows no capacity attenuation after 3500 cycles.Moreover,the other Ag bipolar electrode can be adopted to successfully construct Zn–I_(2) and Zn–Br_(2) batteries exhibiting much higher voltages of 2.44 and 2.67 V,which also show no obvious capacity degradation for 1000 and 800 cycles,representing decent cycle stability.Since bipolar electrode can be applied in a large family of aqueous batteries,this work offers an elaborate high-voltage concept based on tri-functional metallic bipolar electrode as a model system to open a door to explore high-voltage aqueous batteries.展开更多
Bi_2Se_3 was studied as a novel sodium-ion battery anode material because of its high theoretical capacity and high intrinsic conductivity. Integrated with carbon,Bi_2Se_3/C composite shows excellent cyclic performanc...Bi_2Se_3 was studied as a novel sodium-ion battery anode material because of its high theoretical capacity and high intrinsic conductivity. Integrated with carbon,Bi_2Se_3/C composite shows excellent cyclic performance and rate capability. For instance, the Bi_2Se_3/C anode delivers an initial capacity of 527 mAh g^(-10) at 0.1 A g^(-1) and maintains 89% of this capacity over 100 cycles. The phase change and sodium storage mechanism are also carefully investigated.展开更多
The centenary of insulin discovery represents an important opportunity to transform diabetes from a fatal diagnosis into a medically manageable chronic condition.Insulin is a key peptide hormone and mediates the syste...The centenary of insulin discovery represents an important opportunity to transform diabetes from a fatal diagnosis into a medically manageable chronic condition.Insulin is a key peptide hormone and mediates the systemic glucose metabolism in different tissues.Insulin resistance(IR)is a disordered biological response for insulin stimulation through the disruption of different molecular pathways in target tissues.Acquired conditions and genetic factors have been implicated in IR.Recent genetic and biochemical studies suggest that the dysregulated metabolic mediators released by adipose tissue including adipokines,cytokines,chemokines,excess lipids and toxic lipid metabolites promote IR in other tissues.IR is associated with several groups of abnormal syndromes that include obesity,diabetes,metabolic dysfunction-associated fatty liver disease(MAFLD),cardiovascular disease,polycystic ovary syndrome(PCOS),and other abnormalities.Although no medication is specifically approved to treat IR,we summarized the lifestyle changes and pharmacological medications that have been used as efficient intervention to improve insulin sensitivity.Ultimately,the systematic discussion of complex mechanism will help to identify potential new targets and treat the closely associated metabolic syndrome of IR.展开更多
基金The authors would like to acknowledge the financial support sponsored by Ten-thousand Talents Program,K.C.Wong Pioneer Talent Program,Shanghai Pujiang Program (Grant No.19PJ1410600)the National Natural Science Foundation of China (Grant No.51901240).
文摘Aqueous rechargeable zinc batteries are very attractive for energy storage applications due to their low cost and high safety.However,low operating voltages limit their further development.For the first time,this work proposes a unique approach to increase the voltages of aqueous zinc batteries by using tri-functional metallic bipolar electrode with good electrochemical activity and ultrahigh electronic conductivity,which not only participates in redox reactions,but also functions as an electrical highway for charge transport.Furthermore,bipolar electrode can replace expensive ion selective membrane to separate electrolytes with different pH;thus,redox couples with higher potential in acid condition and Zn=Zn(OH)^(2-)_(4) couple with lower potential in alkaline condition can be employed together,leading to high voltages of aqueous zinc batteries.Herein,two types of metallic bipolar electrodes of Cu and Ag are utilized based on three kinds of aqueous zinc batteries:Zn–MnO_(2),Zn–I_(2),and Zn–Br_(2).The voltage of aqueous Zn–MnO_(2) battery is raised to 1.84 V by employing one Cu bipolar electrode,which shows no capacity attenuation after 3500 cycles.Moreover,the other Ag bipolar electrode can be adopted to successfully construct Zn–I_(2) and Zn–Br_(2) batteries exhibiting much higher voltages of 2.44 and 2.67 V,which also show no obvious capacity degradation for 1000 and 800 cycles,representing decent cycle stability.Since bipolar electrode can be applied in a large family of aqueous batteries,this work offers an elaborate high-voltage concept based on tri-functional metallic bipolar electrode as a model system to open a door to explore high-voltage aqueous batteries.
基金the support from TcSUH as the TcSUH Robert A. Welch Professorships on High Temperature Superconducting (HTSg) and Chemical Materials (E-0001)the support from the National Science Foundation under grant number DMR-1410936
文摘Bi_2Se_3 was studied as a novel sodium-ion battery anode material because of its high theoretical capacity and high intrinsic conductivity. Integrated with carbon,Bi_2Se_3/C composite shows excellent cyclic performance and rate capability. For instance, the Bi_2Se_3/C anode delivers an initial capacity of 527 mAh g^(-10) at 0.1 A g^(-1) and maintains 89% of this capacity over 100 cycles. The phase change and sodium storage mechanism are also carefully investigated.
基金supported by NANJING ANJI BIOTECHNOLOGY Co.Ltd,the Project Program of State Key Laboratory of Natural Medicines(SKLNMZZ202028)National Natural Science Foundation of China(82103118)。
文摘The centenary of insulin discovery represents an important opportunity to transform diabetes from a fatal diagnosis into a medically manageable chronic condition.Insulin is a key peptide hormone and mediates the systemic glucose metabolism in different tissues.Insulin resistance(IR)is a disordered biological response for insulin stimulation through the disruption of different molecular pathways in target tissues.Acquired conditions and genetic factors have been implicated in IR.Recent genetic and biochemical studies suggest that the dysregulated metabolic mediators released by adipose tissue including adipokines,cytokines,chemokines,excess lipids and toxic lipid metabolites promote IR in other tissues.IR is associated with several groups of abnormal syndromes that include obesity,diabetes,metabolic dysfunction-associated fatty liver disease(MAFLD),cardiovascular disease,polycystic ovary syndrome(PCOS),and other abnormalities.Although no medication is specifically approved to treat IR,we summarized the lifestyle changes and pharmacological medications that have been used as efficient intervention to improve insulin sensitivity.Ultimately,the systematic discussion of complex mechanism will help to identify potential new targets and treat the closely associated metabolic syndrome of IR.
