相对于传统商用锂离子电池,使用不易燃无机固体电解质的全固态锂电池可在实现高电压和大容量的同时确保电池的安全性。为实现全固态锂电池在室温条件下的稳定循环,开发具有良好电极相容性的超离子导体作为无机固体电解质材料显得至关重...相对于传统商用锂离子电池,使用不易燃无机固体电解质的全固态锂电池可在实现高电压和大容量的同时确保电池的安全性。为实现全固态锂电池在室温条件下的稳定循环,开发具有良好电极相容性的超离子导体作为无机固体电解质材料显得至关重要。2018年,采用Li_(3)YCl_(6)快离子导体作为电解质的In Li/Li Co O_(2)全固态锂电池在无需任何额外界面修饰情况下即可实现室温下的稳定循环,这使得氯化物基固体电解质材料重新引起关注,并在近几年得到飞速发展。本文首先强调了良好的正极相容性是氯化物基超离子导体最具吸引力的优势,同时指出传统氯化物基电解质在负极侧的界面不稳定性来源于易被还原的中心金属元素,并提出了通过非密堆积型阴离子亚晶格实现氯化物基超离子导体更快、更低势垒的离子传导设计思路。最后,总结了近几年氯化物基固体电解质材料的研究进展,并讨论了在其大规模应用之前仍需解决的问题。展开更多
s:The wheat seeds are pretreated by means of super low energy ionic beams(500eV).Field planting and indoor trial raising as well as the electrophoreses analsis of isodynamic enzyme of the wheat have shown:isodynamic e...s:The wheat seeds are pretreated by means of super low energy ionic beams(500eV).Field planting and indoor trial raising as well as the electrophoreses analsis of isodynamic enzyme of the wheat have shown:isodynamic enzyme belt is changed,and the effective wheat ear numbers as well as the output per mu are also evidently increased. Maximum increase in production in small scale test can be up to 21 8%.展开更多
Poor conductivity and sluggish Na^(+) diffusion kinetic are two major drawbacks for practical application of sodium super-ionic conductor(NASICON) in sodium-ion batteries. In this work, we report a simple approach to ...Poor conductivity and sluggish Na^(+) diffusion kinetic are two major drawbacks for practical application of sodium super-ionic conductor(NASICON) in sodium-ion batteries. In this work, we report a simple approach to synthesize quasi-inverse opal structural NASICON/N-doped carbon for the first time by a delicate one-pot solution-freeze drying-calcination process, aiming at fostering the overall electrochemical performance. Especially, the quasi-inverse opal structural Na_(3)V_(2)(PO_(4))_(3)/N-C(Q-NVP/N-C) displayed continuous pores, which provides interconnected channels for electrolyte permeation and abundant contacting interfaces between electrolyte and materials, resulting in faster kinetics of redox reaction and higher proportion of capacitive behavior.As a cathode material for sodium-ion batteries, the Q-NVP/N-C exhibits high specific capacity of 115 mAh·g^(-1) at 1C, still 61 mAh·g^(-1) at ultra-high current density of 100C,and a specific capacity of 89.7mAh·g^(-1) after 2000 cycles at 20C.This work displays the general validity of preparation method for not only Q-NVP/N-C,but also Na_(3)V_(2)(PO_(4))_(3),which provides a prospect for delicate synthesis of NASICON materials with excellent electrochemical performance.展开更多
用硅溶胶和聚乙烯醇缩聚反应生成的溶胶、凝胶制备了固体电解质钠快离子导体(natrium super ionic conductor,Nasicon)。用热重-差热、X射线衍射、透射电镜等现代分析方法表征锻烧温度为800～1000℃,锻烧时间为2～8h Nasicon粉体的相结...用硅溶胶和聚乙烯醇缩聚反应生成的溶胶、凝胶制备了固体电解质钠快离子导体(natrium super ionic conductor,Nasicon)。用热重-差热、X射线衍射、透射电镜等现代分析方法表征锻烧温度为800～1000℃,锻烧时间为2～8h Nasicon粉体的相结构和形貌。与传统的由正硅酸乙酯水解、缩聚反应生成的溶胶、凝胶制得的Nasicon粉体的对比,发现:用硅溶胶和聚乙烯醇反应制得的Nasicon粉体相的纯度更高,粉体颗粒粒径在80～100nm,并且颗粒分散均匀、大致成球形,为今后制备性能良好的传感器创造了条件。展开更多
文摘相对于传统商用锂离子电池,使用不易燃无机固体电解质的全固态锂电池可在实现高电压和大容量的同时确保电池的安全性。为实现全固态锂电池在室温条件下的稳定循环,开发具有良好电极相容性的超离子导体作为无机固体电解质材料显得至关重要。2018年,采用Li_(3)YCl_(6)快离子导体作为电解质的In Li/Li Co O_(2)全固态锂电池在无需任何额外界面修饰情况下即可实现室温下的稳定循环,这使得氯化物基固体电解质材料重新引起关注,并在近几年得到飞速发展。本文首先强调了良好的正极相容性是氯化物基超离子导体最具吸引力的优势,同时指出传统氯化物基电解质在负极侧的界面不稳定性来源于易被还原的中心金属元素,并提出了通过非密堆积型阴离子亚晶格实现氯化物基超离子导体更快、更低势垒的离子传导设计思路。最后,总结了近几年氯化物基固体电解质材料的研究进展,并讨论了在其大规模应用之前仍需解决的问题。
文摘s:The wheat seeds are pretreated by means of super low energy ionic beams(500eV).Field planting and indoor trial raising as well as the electrophoreses analsis of isodynamic enzyme of the wheat have shown:isodynamic enzyme belt is changed,and the effective wheat ear numbers as well as the output per mu are also evidently increased. Maximum increase in production in small scale test can be up to 21 8%.
基金the National Natural Science Foundation of China(Nos.22105059 and 2210051199)the Talent Introduction Program of Hebei Agricultural University(No.YJ201810)+3 种基金Qingdao Source Innovation Project(No.19-6-2-19-cg)the Natural Science Foundation of Shandong Province(No.ZR2021QE192)the Natural Science Foundation of Hebei Province(No.B2019204009)the China Postdoctoral Science Foundation(No.2018M630747)。
文摘Poor conductivity and sluggish Na^(+) diffusion kinetic are two major drawbacks for practical application of sodium super-ionic conductor(NASICON) in sodium-ion batteries. In this work, we report a simple approach to synthesize quasi-inverse opal structural NASICON/N-doped carbon for the first time by a delicate one-pot solution-freeze drying-calcination process, aiming at fostering the overall electrochemical performance. Especially, the quasi-inverse opal structural Na_(3)V_(2)(PO_(4))_(3)/N-C(Q-NVP/N-C) displayed continuous pores, which provides interconnected channels for electrolyte permeation and abundant contacting interfaces between electrolyte and materials, resulting in faster kinetics of redox reaction and higher proportion of capacitive behavior.As a cathode material for sodium-ion batteries, the Q-NVP/N-C exhibits high specific capacity of 115 mAh·g^(-1) at 1C, still 61 mAh·g^(-1) at ultra-high current density of 100C,and a specific capacity of 89.7mAh·g^(-1) after 2000 cycles at 20C.This work displays the general validity of preparation method for not only Q-NVP/N-C,but also Na_(3)V_(2)(PO_(4))_(3),which provides a prospect for delicate synthesis of NASICON materials with excellent electrochemical performance.
文摘用硅溶胶和聚乙烯醇缩聚反应生成的溶胶、凝胶制备了固体电解质钠快离子导体(natrium super ionic conductor,Nasicon)。用热重-差热、X射线衍射、透射电镜等现代分析方法表征锻烧温度为800～1000℃,锻烧时间为2～8h Nasicon粉体的相结构和形貌。与传统的由正硅酸乙酯水解、缩聚反应生成的溶胶、凝胶制得的Nasicon粉体的对比,发现:用硅溶胶和聚乙烯醇反应制得的Nasicon粉体相的纯度更高,粉体颗粒粒径在80～100nm,并且颗粒分散均匀、大致成球形,为今后制备性能良好的传感器创造了条件。
