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In situ formed three-dimensional (3d) lithium-boron(Li-B) alloy as a potential anode for next-generation lithium batteries

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Rare Metals 2021年第12期40卷 3494-3500页

作者： Hai-Feng Huang Yi-Na Gui Fu Sun Zhi-Jian Liu Hui-Long Ning Chen Wu Li-Bao Chen State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China

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 Li B 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 m Ah·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 contents for next-generation high energy density LMBs.

关键词： Li-B alloy 3d skeleton Solid electrolyte interface(SEI) Anode Lithium metal battery

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Three-dimensional Modeling of the Retinal Vascular Tree via Fractal Interpolation

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Computer Modeling in Engineering & Sciences 2021年第4期127卷 59-77页

作者： Hichem Guedri Abdullah Bajahzar Hafedh Belmabrouk Electronics and Microelectronics Laboratory Department of PhysicsFaculty of SciencesMonastir UniversityMonastir5019Tunisia department of Computer Science and Information College of ScienceMajmaah UniversityZulfi11932Saudi Arabia department of Physics College of Science ZulfiMajmaah UniversityZulfi11932Saudi Arabia

In recent years,the three dimensional reconstruction of vascular structures in the field of medical research has been extensively *** studies describe the various numerical methods to numerical modeling of vascular structures in ***,the current approaches remain too expensive in terms of storage ***,it is necessary to find the right balance between the relevance of information and storage *** article adopts two sets of human retinal blood vessel data in 3d to proceed with data reduction in the first part and then via 3d fractal reconstruction,recreate them in a second *** results show that the reduction rate obtained is between 66%and 95%as a function of the tolerance *** on the number of iterations used,the 3d blood vessel model is successful at reconstruction with an average error of 0.19 to 5.73 percent between the original picture and the reconstructed image.

关键词： Fractal interpolation 3d douglas–Peucker algorithm 3d skeleton blood vessel tree iterated function system retinal image

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Key Pose Frame Extraction Method of Human Motion Based on 3d Framework and X-Means

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Journal of Beijing Institute of Technology 2017年第1期26卷 75-83页

作者： Sirui Zhao Yadong Wu Wenchao Yang Xiaowei Li School of Computer Science and Technology Southwest University of Science and Technology Mianyang 621010 China Fundamental Science on Nuclear Wastes and Environmental Security Laboratory Southwest University of Science and Technology Mianyang 621010 China

The key pose frames of a human motion pose sequence,play an important role in the compression,retrieval and semantic analysis of continuous human *** current available clustering methods in literatures are difficult to determine the number of key pose frames automatically,and may destroy the postures’ temporal relationships while extracting key *** deal with this problem,this paper proposes a new key pose frames extraction method on the basis of 3d space distances of joint points and the improved X-means clustering *** to the proposed extraction method,the final key pose frame sequence could be obtained by describing the posture of human body with space distance of particular joint points and then the time-constraint X-mean algorithm is applied to cluster and filtrate the posture *** experimental results show that the proposed method can automatically determine the number of key frames and save the temporal characteristics of motion frames according to the motion pose sequence.

关键词： human motion analysis key flame extraction 3d skeleton X-means clustering

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长寿命锂电池用三维亲锂双骨架支撑锂金属负极的设计

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Science China Materials 2023年第11期66卷 4349-4356页

作者：刘鑫胜龙科成青飘黄绍祯肖鹏飞凌灿辉吴志彬陈立宝 State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

锂金属被认为是下一代高能锂电池最有前途的负极材料之一.然而,锂的不均匀沉积和巨大的体积变化严重限制了锂金属阳极的实际应用.本文采用简单的熔融法制备了无枝晶的双骨架三维复合锂负极(Li-B-Sn).Li-B-Sn复合负极独特的双骨架结构由... 详细信息

锂金属被认为是下一代高能锂电池最有前途的负极材料之一.然而,锂的不均匀沉积和巨大的体积变化严重限制了锂金属阳极的实际应用.本文采用简单的熔融法制备了无枝晶的双骨架三维复合锂负极(Li-B-Sn).Li-B-Sn复合负极独特的双骨架结构由LiB纤维相和Li22Sn5相组成,有利于锂的均匀脱除和沉积,减小了体积变化,提高了Li-B-Sn负极的性能.在对称电池中,Li-B-Sn负极在10 mA cm^(-2)的大面积容量下实现了1100h的长循环寿命.此外,高负载的LiFePO_(4)正极(~11 mg cm^(-2))和Li-B-Sn复合负极组装的全电池表现出优异的电化学性能,在2 C循环430次后,容量保持率高达92.5%.基于Li-B-Sn复合负极的Li-S软包电池循环寿命超过30圈,表现出比基于Li-B负极的Li-S软包电池更好的循环稳定性.三维骨架设计为锂金属电池的实际应用带来了新思路.

关键词： lithium metal anode dual-skeletons 3d skeleton

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