锂硫电池固有的缓慢转化动力学和严重的穿梭效应导致其可逆容量和循环寿命差,严重阻碍了其实际应用.为了解决这些问题,我们设计并构建了一种Ni/Ni_(2)P异质结嵌入介孔碳纳米球的复合材料(Ni/Ni_(2)P-MCN),将其用于锂硫电池隔膜改性以促...锂硫电池固有的缓慢转化动力学和严重的穿梭效应导致其可逆容量和循环寿命差,严重阻碍了其实际应用.为了解决这些问题,我们设计并构建了一种Ni/Ni_(2)P异质结嵌入介孔碳纳米球的复合材料(Ni/Ni_(2)P-MCN),将其用于锂硫电池隔膜改性以促进多硫化物的催化转化.研究发现,Ni/Ni_(2)P-MCN改性隔膜可以通过丰富的异质结化学吸附位点吸附多硫化物、抑制穿梭效应,而且对多硫化物的转化具有优异的催化活性.此外,具有暴露介孔结构的导电碳球可以作为物理屏障,容纳沉积的不溶性Li_(2)S.因此,使用Ni/Ni_(2)P-MCN改性隔膜的电池显示出优异的倍率性能(5 C下431 mA h g^(-1))和循环稳定性(1500次循环下平均容量衰减约0.031%).在4.2 mg cm^(-2)的高载硫下,输出面积比容量约3.5 mA h cm^(-2).我们认为,这种独特的Ni/Ni_(2)P异质结/多孔碳复合材料在高性能、可持续储能器件中具备巨大的应用潜力.展开更多
The architecture control of mesoporous materials at the mesoscale is of great importance to their properties and resultant potential applications[1,2].To synthesize mesoporous materials with expected morphologies or m...The architecture control of mesoporous materials at the mesoscale is of great importance to their properties and resultant potential applications[1,2].To synthesize mesoporous materials with expected morphologies or mesostructures,numerous synthetic protocols have been developed[3–6],which have witnessed the significant progress in the construction of mesoporous materials with various morphologies or mesostructures.However,it remains a great challenge to build a visualized relationship between organic templates and the desired architectures of the inorganic products.展开更多
基金supported by the National Basic Research Program of China(2012CB933602)the National Natural Science Foundation of China(51172070,51132009,51202068 and51472085)+1 种基金Shu Guang Project(11SG30)the Fundamental Research Funds for the Central Universities
基金supported by the National Key Research and Development Program of China (2016YFA0203700)the National Natural Science Foundation of China (51672083, 51962022 and 52072124)+4 种基金the Natural Science Foundation of Shanghai (20ZR1414900)the Program of Shanghai Academic/Technology Research Leader (18XD1401400)the Leading Talents in Shanghai in 2018the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learningthe 111 Project (B14018)。
基金financially supported by the National Natural Science Foundation of China(52072124)Shanghai Municipal Science and Technology Major Project(2018SHZDZX03)+3 种基金the Natural Science Foundation of Shanghai(20ZR1414900)the Leading Talents in Shanghai in2018the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learningthe 111 Project(B14018)。
文摘锂硫电池固有的缓慢转化动力学和严重的穿梭效应导致其可逆容量和循环寿命差,严重阻碍了其实际应用.为了解决这些问题,我们设计并构建了一种Ni/Ni_(2)P异质结嵌入介孔碳纳米球的复合材料(Ni/Ni_(2)P-MCN),将其用于锂硫电池隔膜改性以促进多硫化物的催化转化.研究发现,Ni/Ni_(2)P-MCN改性隔膜可以通过丰富的异质结化学吸附位点吸附多硫化物、抑制穿梭效应,而且对多硫化物的转化具有优异的催化活性.此外,具有暴露介孔结构的导电碳球可以作为物理屏障,容纳沉积的不溶性Li_(2)S.因此,使用Ni/Ni_(2)P-MCN改性隔膜的电池显示出优异的倍率性能(5 C下431 mA h g^(-1))和循环稳定性(1500次循环下平均容量衰减约0.031%).在4.2 mg cm^(-2)的高载硫下,输出面积比容量约3.5 mA h cm^(-2).我们认为,这种独特的Ni/Ni_(2)P异质结/多孔碳复合材料在高性能、可持续储能器件中具备巨大的应用潜力.
基金the National Key Research and Development Program of China(2018YFC1105702 and 2016YFA0203700)the National Natural Science Foundation of China(51621002 and 51972112)+5 种基金Program of Shanghai Academic/Technology Research Leader(18XD1401400)Basic Research Program of Shanghai(17JC1404702 and 19JC1411700)Leading Talents in Shanghai in 2018the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learningthe 111 Project(B14018)the Fundamental Research Funds for Central Universities(222201718002)。
文摘The architecture control of mesoporous materials at the mesoscale is of great importance to their properties and resultant potential applications[1,2].To synthesize mesoporous materials with expected morphologies or mesostructures,numerous synthetic protocols have been developed[3–6],which have witnessed the significant progress in the construction of mesoporous materials with various morphologies or mesostructures.However,it remains a great challenge to build a visualized relationship between organic templates and the desired architectures of the inorganic products.
