【摘 要】
：
The practical application of the lithium anode in lithium metal batteries (LMBs) has been hindered by the uncontrollable growth of lithium dendrite and the high volumetric change during cycling.Herein,the in situ formed three-dimensional (3D) lithium-boro
【机 构】
：
State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Institute o
论文部分内容阅读
The practical application of the lithium anode in lithium metal batteries (LMBs) has been hindered by the uncontrollable growth of lithium dendrite and the high volumetric change during cycling.Herein,the in situ formed three-dimensional (3D) lithium-boron (Li-B) alloy is suggested as an excellent alternative to the Li metal,in which the 3D LiB skeleton can mitigate the growth of Li dendrites and volumetric change.In this study,the Li-B alloy anodes with different B contents were manufactured by high-temperature melting.It was found that the boron content had a significant effect on the electrochemical performance of the Li-B alloy.The Li-B alloy with the least B content (10 wt％,10LiB) demonstrated the lowest overpotential of 0.0852 V after 300 h and the lowest interface resistance.However,the full cell with 15LiB as the anode displayed the best cycling performance of 115 mAh·g-1 after 100 cycles with a columbic efficiency greater than 97％.The obtained results suggest that the in situ formed three-dimensional Li-B alloy anode can be an excellent alternative to the Li anode via tuning B con-tents for next-generation high energy density LMBs.
其他文献
随着人工智能的快速发展,创客教育在全国悄然兴起,开源硬件作为创客教育的技术核心,发挥着重要的作用.小学着重培养学生综合能力和综合素质,是开源硬件课程开展实施的沃土.但从实际开展情况来看,开源硬件教学目前仍然停留在“技术本位”为主的阶段.技术只是工具,思维的培养才是核心.开源硬件不仅是指硬件制作与开放学习的课程,更强调的是创新思维与能力的培养,而技术本位的教学方式不能达成这一目标.要解决这一问题需要长期的探索与实践,教师需要在日常教学中转变观念,将思维培养放在核心地位逐步培养.思维可视化是将“只可意会不可言
作者利用信息技术等现代手段摹制、刻制我国宋刻本古籍,在制作、欣赏过程中体会国学知识,进而培养学生核心素养.虽然制作成本低廉,但是摹制的宋刻本古籍可以与专业出版社水平相媲美.
Hydrogen is considered to be an ideal safe and clean energy source,which can be produced by water splitting.The high overpotential of hydrogen evolution reaction (HER) is one of the bottleneck issues for the practical application of water splitting,where
本文以《Excel数据图表》一课为例,从四个方面阐述了以技术支持信息技术教学的实施过程,旨在技术助力教学方式的改变,提升教学效率.这四个方面分别是:采用微课助力教学重难点的解决;在线考试工具助力课堂教学效果检测;思维导图助力知识总结、归纳;云存储工具助力课堂延伸.
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have attracted growing interest regarding their potential applications in next-generation electronic and optoelectronic devices.Owing to their atomic thickness and tunable bandgap,they exhibit
Combining metal to form metal phosphide is a promising strategy to address the fast capacity decay of P rooted from its low electronic conductivity and large vol-ume changes upon cycling.Cu3P,which possesses a high theoretical gravimetric and volumetric c
Metallic nanoparticles (NPs) are a class of important materials with widespread applications due to their chem-ical stability and high photothermal conversion efficiency.
Electrocatalytic CO2 reduction reaction(CO2RR) converts CO2 into valuable chemical fuels,which can effectively alleviate global warming and energy crisis.However,limited by its slow reaction rate and low product selectivity,it is urgent to design efficien
Today,nanocrystals enclosed by high-index facets (HIFs) are attracting widely attentions of researchers due to their tremendous potential in the field of catalysis,especially in electrocatalysis,such as electro-oxidation of small organic molecule (such as
In this study,the LiFePO4 cathode was syn-thesized by the ionic thermal method using the deep eutectic mixture of tetramethyl ammonium chloride and urea.The synthetic conditions were systematically inves-tigated by orthogonal experiments,which indicate th