The development of insertion-type anodes is the key to designing“rocking chair”zinc-ion batteries.However,there is rare report on high mass loading anode with high performances.Here,{001}-oriented Bi OCl nanosheets ...The development of insertion-type anodes is the key to designing“rocking chair”zinc-ion batteries.However,there is rare report on high mass loading anode with high performances.Here,{001}-oriented Bi OCl nanosheets with Sn doping are proposed as a promising insertion-type anode.The designs of cross-linked CNTs conductive network,{001}-oriented nanosheet,and Sn doping significantly enhance ion/electron transport,proved via experimental tests and theoretical calculations(density of states and diffusion barrier).The H^(+)/Zn^(2+)synergistic co-insertion mechanism is proved via ex situ XRD,Raman,XPS,and SEM tests.Accordingly,this optimized electrode delivers a high reversible capacity of 194 m A h g^(-1)at 0.1 A g^(-1)with a voltage of≈0.37 V and an impressive cyclability with 128 m A h g^(-1)over 2500 cycles at 1 A g^(-1).It also shows satisfactory performances at an ultrahigh mass loading of 10 mg cm^(-2).Moreover,the Sn-Bi OCl//MnO_(2)full cell displays a reversible capacity of 85 m A h g^(-1)at 0.2 A g^(-1)during cyclic test.展开更多
第5代移动通信技术(5th generation mobile networks,5G通信)发展方兴未艾。5G网络的普及需要建设大量的5G基站,这些海量的5G基站将在未来成为可观的潜在灵活性资源。5G基站参与需求响应,即对于5G基站中的供电设备和用电设备进行调度,...第5代移动通信技术(5th generation mobile networks,5G通信)发展方兴未艾。5G网络的普及需要建设大量的5G基站,这些海量的5G基站将在未来成为可观的潜在灵活性资源。5G基站参与需求响应,即对于5G基站中的供电设备和用电设备进行调度,能够在降低5G用电成本的同时,为电力系统提供灵活性资源,实现通信系统与电力系统的双赢。该文总结了5G基站的基本组成设备和用电特性,分析了其参与需求响应的潜力;梳理了5G基站参与需求响应所必需的关键技术;展望了5G基站作为需求侧资源参与电力系统互动的应用场景;最后,对于5G基站参与需求响应潜在的商业模式进行探讨。展开更多
Thermal management of textiles requires local microclimate control over heat and wet dissipation to create a comfortable thermal-wet environment at the interface of the human body and clothing.Herein,we design a fabri...Thermal management of textiles requires local microclimate control over heat and wet dissipation to create a comfortable thermal-wet environment at the interface of the human body and clothing.Herein,we design a fabric capable of both sweat-and cooling-management using a knitted fabric featuring a bilayer structure consisting of hydrophobic polyethylene terephthalate and hydrophilic cellulose fibers to simultaneously achieve high infrared(IR)transmittance and good thermal-wet comfort.The IR transmission of this cooling textile increased by~twofold in the dry state and~eightfold in the wet state compared to conventional cotton fabric.When the porosity changes from 10 to 47%with the comparison of conventional cotton fabric and our cooling textile,the heat flux is increased from 74.4 to 152.3 W/cm^(2).The cooling effect of the cooling fabric is 105%greater than that of commercial cotton fabric,which displays a better thermal management capacity for personal cooling.This bilayer design controls fast moisture transfer from inside out and provides thermal management,demonstrating high impact not only for garments,but also for other systems requiring heat regulation,such as buildings,which could mitigate energy demand and ultimately contribute to the relief of global energy and climate issues.展开更多
Precise control of alloying sites has long been a challenge,yet little has been achieved in the atomic-level manipulation of metallic nanomaterials.This study reported a three-stage metal and motif exchange mechanism ...Precise control of alloying sites has long been a challenge,yet little has been achieved in the atomic-level manipulation of metallic nanomaterials.This study reported a three-stage metal and motif exchange mechanism of alloying reaction of an atomically precise ligand-protected[Ag_(44)(p-MBA)_(30)]^(4−)(p-MBA=para-mercaptobenzoic acid)cluster with[Au_(2)(p-NTP)_(2)Cl]^(−)(p-MBA=para-mercaptobenzoic acid).During the first stage(Stage I),an exchange of ligand-shell metal atoms took place.During the second stage(Stage II),the motif exchanged on the[AuAg_(43)(p-MBA)_(30)]^(4−)cluster.During the third stage(Stage III),the Au(I)atom in the ligand-shell was swapped with a Ag(0)atom of the icosahedral Ag12-core.The density functional theory(DFT)calculation results demonstrated that the metal exchange proceeded via different mechanisms at the different reaction stages.In reaction Stages I and II,the metal exchange proceeded via formation of a dianionic[Ag_(44)(p-MBA)_(30)]^(4−)-[Au_(2)(p-NTP)_(2)Cl]^(−)intermediate and then broke and recombined with the ligand-shell.In Stage III,the diffusion of the Au(I)to icosahedral Ag12-core(Stage III)was proceeded via a motif catalyzed heterometal atom diffusion mechanism.We hope that this work will provide a new perspective for the precise control of alloy position in alloyed nanomaterials.展开更多
基金supported by the Natural Science Foundation of China (52102312,51672234,and 52072325)the Natural Science Foundation of Hunan Province of China (2021JJ40528)+2 种基金the China Postdoctoral Science Foundation (2020M682581)the Macao Young Scholars Program (AM2021011)the College Student Innovation and Entrepreneurship Training Program (S202210530051)。
文摘The development of insertion-type anodes is the key to designing“rocking chair”zinc-ion batteries.However,there is rare report on high mass loading anode with high performances.Here,{001}-oriented Bi OCl nanosheets with Sn doping are proposed as a promising insertion-type anode.The designs of cross-linked CNTs conductive network,{001}-oriented nanosheet,and Sn doping significantly enhance ion/electron transport,proved via experimental tests and theoretical calculations(density of states and diffusion barrier).The H^(+)/Zn^(2+)synergistic co-insertion mechanism is proved via ex situ XRD,Raman,XPS,and SEM tests.Accordingly,this optimized electrode delivers a high reversible capacity of 194 m A h g^(-1)at 0.1 A g^(-1)with a voltage of≈0.37 V and an impressive cyclability with 128 m A h g^(-1)over 2500 cycles at 1 A g^(-1).It also shows satisfactory performances at an ultrahigh mass loading of 10 mg cm^(-2).Moreover,the Sn-Bi OCl//MnO_(2)full cell displays a reversible capacity of 85 m A h g^(-1)at 0.2 A g^(-1)during cyclic test.
文摘第5代移动通信技术(5th generation mobile networks,5G通信)发展方兴未艾。5G网络的普及需要建设大量的5G基站,这些海量的5G基站将在未来成为可观的潜在灵活性资源。5G基站参与需求响应,即对于5G基站中的供电设备和用电设备进行调度,能够在降低5G用电成本的同时,为电力系统提供灵活性资源,实现通信系统与电力系统的双赢。该文总结了5G基站的基本组成设备和用电特性,分析了其参与需求响应的潜力;梳理了5G基站参与需求响应所必需的关键技术;展望了5G基站作为需求侧资源参与电力系统互动的应用场景;最后,对于5G基站参与需求响应潜在的商业模式进行探讨。
基金This project was made possible by financial support from the Delivering Efficient Local Thermal Amenities(DELTA)Program of the Advanced Research Projects Agency-Energy(ARPA-E),U.S.Department of Energy.
文摘Thermal management of textiles requires local microclimate control over heat and wet dissipation to create a comfortable thermal-wet environment at the interface of the human body and clothing.Herein,we design a fabric capable of both sweat-and cooling-management using a knitted fabric featuring a bilayer structure consisting of hydrophobic polyethylene terephthalate and hydrophilic cellulose fibers to simultaneously achieve high infrared(IR)transmittance and good thermal-wet comfort.The IR transmission of this cooling textile increased by~twofold in the dry state and~eightfold in the wet state compared to conventional cotton fabric.When the porosity changes from 10 to 47%with the comparison of conventional cotton fabric and our cooling textile,the heat flux is increased from 74.4 to 152.3 W/cm^(2).The cooling effect of the cooling fabric is 105%greater than that of commercial cotton fabric,which displays a better thermal management capacity for personal cooling.This bilayer design controls fast moisture transfer from inside out and provides thermal management,demonstrating high impact not only for garments,but also for other systems requiring heat regulation,such as buildings,which could mitigate energy demand and ultimately contribute to the relief of global energy and climate issues.
基金the National Natural Science Foundation of China(Nos.91961121,21773201,and 21422305)the Project of Innovation Team of the Ministry of Education(No.IRT_17R90).
文摘Precise control of alloying sites has long been a challenge,yet little has been achieved in the atomic-level manipulation of metallic nanomaterials.This study reported a three-stage metal and motif exchange mechanism of alloying reaction of an atomically precise ligand-protected[Ag_(44)(p-MBA)_(30)]^(4−)(p-MBA=para-mercaptobenzoic acid)cluster with[Au_(2)(p-NTP)_(2)Cl]^(−)(p-MBA=para-mercaptobenzoic acid).During the first stage(Stage I),an exchange of ligand-shell metal atoms took place.During the second stage(Stage II),the motif exchanged on the[AuAg_(43)(p-MBA)_(30)]^(4−)cluster.During the third stage(Stage III),the Au(I)atom in the ligand-shell was swapped with a Ag(0)atom of the icosahedral Ag12-core.The density functional theory(DFT)calculation results demonstrated that the metal exchange proceeded via different mechanisms at the different reaction stages.In reaction Stages I and II,the metal exchange proceeded via formation of a dianionic[Ag_(44)(p-MBA)_(30)]^(4−)-[Au_(2)(p-NTP)_(2)Cl]^(−)intermediate and then broke and recombined with the ligand-shell.In Stage III,the diffusion of the Au(I)to icosahedral Ag12-core(Stage III)was proceeded via a motif catalyzed heterometal atom diffusion mechanism.We hope that this work will provide a new perspective for the precise control of alloy position in alloyed nanomaterials.