Potassium-ion batteries(PIBs)are a promising candidate for next-generation electric energy storage applications because of the abundance and low cost of potassium.However,the development of PIBs is limited by sluggish...Potassium-ion batteries(PIBs)are a promising candidate for next-generation electric energy storage applications because of the abundance and low cost of potassium.However,the development of PIBs is limited by sluggish kinetics and huge volume expansion of anodes,leading to poor rate capability and cycling stability.Herein,an advanced superstructure anode,including Te-doped SnS_(2) nanosheets uniformly anchored on MXene surface(Te-SnS_(2)/MXene),is rationally designed for the first time to boost K^(+)storage performance.Featuring with strong interface interaction and self-autoadjustable interlayer spacings,the Te-SnS_(2)/MXene can efficiently accelerate electron/ion transfer,accommodate volume expansion,inhibit crack formation,and improve pseudocapacitive contribution during cycling.Thus,the novel Te-SnS_(2)/MXene anode delivers a high reversible capacity(343.2 mAh g^(-1) after 50 cycles at0.2 A g^(-1)),outstanding rate capability(186.4 mAh g^(-1) at 20 A g^(-1)),long cycle stability(165.8 mAh g^(-1)after 5000 cycles at 10 A g^(-1) with a low electrode swelling rate of only 15.4%),and reliable operation in flexible full battery.The present Te-SnS_(2)/MXene becomes among the best transition metal-based anode materials for PIBs reported to date.展开更多
The aprotic lithium-oxygen battery(Li-O_(2) battery) has attracted much attraction for the future advanced battery technologies due to its ultra-high theoretical energy density that can well meet the ever-growing ener...The aprotic lithium-oxygen battery(Li-O_(2) battery) has attracted much attraction for the future advanced battery technologies due to its ultra-high theoretical energy density that can well meet the ever-growing energy demand of portable electronic products,electric vehicles(EVs),smart grids,and so on [1-5].In principle.展开更多
Rechargeable lithium-ion batteries(LIBs)represent the highest energy density in the contemporary energy storage community,typically delivering a practical energy density of 150-350 Wh kg-1in the current technique,whic...Rechargeable lithium-ion batteries(LIBs)represent the highest energy density in the contemporary energy storage community,typically delivering a practical energy density of 150-350 Wh kg-1in the current technique,which can hardly satisfy the evergrowing demand for the portable electronic devices and power tools requiring long service time[1-3].展开更多
过渡金属二硫族化合物(TMDs)用作钾离子电池(KIBs)负极时存在反应动力学缓慢及结构稳定性不足等难题,导致其循环和倍率性能差,使得其应用严重受限.在本文中,我们将Te掺杂的1T′-ReSe_(2)负载在MXene上构建了高性能KIBs负极(Te-ReSe_(2)/...过渡金属二硫族化合物(TMDs)用作钾离子电池(KIBs)负极时存在反应动力学缓慢及结构稳定性不足等难题,导致其循环和倍率性能差,使得其应用严重受限.在本文中,我们将Te掺杂的1T′-ReSe_(2)负载在MXene上构建了高性能KIBs负极(Te-ReSe_(2)/MXene).该超结构利用缺陷化的Te-ReSe_(2)与自调节弹性MXene的协同效应,表现出高可逆容量(0.1 A g^(−1)电流密度下循环200圈后为361.1 mA h g^(−1)),优异的倍率性能(20 A g^(−1)电流密度下为179.3 mA h g^(−1))和超长的循环寿命(5 A g^(−1)电流密度下循环2000圈后为202.8 mA h g^(−1)),并能实现柔性全电池的稳定运行,是目前所有TMDs基负极展示的最好性能之一.动力学分析和理论计算表明,该材料具有出色的赝电容特性,高电导率和优异的K^(+)吸附/扩散能力,显著提升了其反应动力学.展开更多
基金financially supported by the National Natural Science Foundation of China(22005223 and 21975187)the Natural Science Foundation of Guangdong Province(No.2019A1515012161)+8 种基金the Special Innovational Project of Department of Education of Guangdong Province(No.2019KTSCX186 and 2017KCXTD031)the Science Foundation for Young Teachers of Wuyi University(2019td01)the Science Foundation for HighLevel Talents of Wuyi University(2018RC50 and 2017RC23)the Innovative Leading Talents of Jiangmen(Jiangren(2019)7)the Science and Technology Projects of Jiangmen(No.(2017)307,(2017)149,(2018)352)the Newton Advanced Fellowships(NAF/R2/180603)the Wuyi University-Hong Kong-Macao Joint Research Project(2019WGALH10)the Laboratory of Optoelectronic Materials and Applications in Guangdong Higher Education(2017KSYS011)the College Student Innovation and Entrepreneurship Training Program Project(2019CX27,2019CX32,2019CX41,201911349021,201911349025)。
文摘Potassium-ion batteries(PIBs)are a promising candidate for next-generation electric energy storage applications because of the abundance and low cost of potassium.However,the development of PIBs is limited by sluggish kinetics and huge volume expansion of anodes,leading to poor rate capability and cycling stability.Herein,an advanced superstructure anode,including Te-doped SnS_(2) nanosheets uniformly anchored on MXene surface(Te-SnS_(2)/MXene),is rationally designed for the first time to boost K^(+)storage performance.Featuring with strong interface interaction and self-autoadjustable interlayer spacings,the Te-SnS_(2)/MXene can efficiently accelerate electron/ion transfer,accommodate volume expansion,inhibit crack formation,and improve pseudocapacitive contribution during cycling.Thus,the novel Te-SnS_(2)/MXene anode delivers a high reversible capacity(343.2 mAh g^(-1) after 50 cycles at0.2 A g^(-1)),outstanding rate capability(186.4 mAh g^(-1) at 20 A g^(-1)),long cycle stability(165.8 mAh g^(-1)after 5000 cycles at 10 A g^(-1) with a low electrode swelling rate of only 15.4%),and reliable operation in flexible full battery.The present Te-SnS_(2)/MXene becomes among the best transition metal-based anode materials for PIBs reported to date.
基金financial support from National Key R&D Program of China(Grant No.2016YFB0100100)the National Natural Science Foundation of China(Grant Nos.21972133 and 21805070)the Newton Advanced Fellowships(NAF/ R2/180603)。
文摘The aprotic lithium-oxygen battery(Li-O_(2) battery) has attracted much attraction for the future advanced battery technologies due to its ultra-high theoretical energy density that can well meet the ever-growing energy demand of portable electronic products,electric vehicles(EVs),smart grids,and so on [1-5].In principle.
基金support from the National Natural Science Foundation of China(21972133,21805070,21605136,21733012,and 21633008)the Newton Advanced Fellowships(NAF/R2/180603)+1 种基金the Guangxi Department of Education(2019KY0394)the"Scientist Studio Funding"from Tianmu Lake Institute of Advanced Energy Storage Technologies Co.,Ltd.
文摘Rechargeable lithium-ion batteries(LIBs)represent the highest energy density in the contemporary energy storage community,typically delivering a practical energy density of 150-350 Wh kg-1in the current technique,which can hardly satisfy the evergrowing demand for the portable electronic devices and power tools requiring long service time[1-3].
基金the National Natural Science Foundation of China(22005223 and 21975187)Guangdong Basic and Applied Basic Research Foundation(2019A1515012161)+7 种基金the Special Innovational Project of Department of Education of Guangdong Province(2019KTSCX186 and 2017KCXTD031)the Science Foundation for Young Teachers of Wuyi University(2019td01)the Science Foundation for High-Level Talents of Wuyi University(2018RC50 and 2017RC23)Wuyi University-Hong Kong-Macao Joint Research Project(2019WGALH10)the Innovative Leading Talents of Jiangmen(Jiangren(2019)7)the Science and Technology Projects of Jiangmen((2017)307,(2017)149,(2018)352)the Research Fund of the State Key Laboratory of Solidification Processing(NPU),China(SKLSP202004)Guangdong Key Building Discipline Research Capability Enhancement Funds(2021ZDJS093).
文摘过渡金属二硫族化合物(TMDs)用作钾离子电池(KIBs)负极时存在反应动力学缓慢及结构稳定性不足等难题,导致其循环和倍率性能差,使得其应用严重受限.在本文中,我们将Te掺杂的1T′-ReSe_(2)负载在MXene上构建了高性能KIBs负极(Te-ReSe_(2)/MXene).该超结构利用缺陷化的Te-ReSe_(2)与自调节弹性MXene的协同效应,表现出高可逆容量(0.1 A g^(−1)电流密度下循环200圈后为361.1 mA h g^(−1)),优异的倍率性能(20 A g^(−1)电流密度下为179.3 mA h g^(−1))和超长的循环寿命(5 A g^(−1)电流密度下循环2000圈后为202.8 mA h g^(−1)),并能实现柔性全电池的稳定运行,是目前所有TMDs基负极展示的最好性能之一.动力学分析和理论计算表明,该材料具有出色的赝电容特性,高电导率和优异的K^(+)吸附/扩散能力,显著提升了其反应动力学.
