Columnar Lithium Metal Deposits: the Role of Non-Aqueous Electrolyte Additive

电解质 金属锂 锂(药物) 金属 材料科学 水溶液 无机化学 化学工程 化学 冶金 心理学 有机化学 工程类 物理化学 电极 精神科
作者
Shi‐Jie Yang,Xiangyang Xu,Xin‐Bing Cheng,Xinmeng Wang,Jinxiu Chen,Ye Xiao,Hong Yuan,He Li,Aibing Chen,Wancheng Zhu,Jia‐Qi Huang,Qiang Zhang
出处
期刊:Acta Physico-chimica Sinica [Peking University Press]
卷期号:: 2007058- 被引量:5
标识
DOI:10.3866/pku.whxb202007058
摘要

With the booming growth market of electric vehicles and portable electronics, high-energy-density rechargeable lithium ion batteries are being extensively used to advance high-end devices.Lithium-ion batteries with graphite anodes approach the ceiling in energy density, but they cannot satisfy the current demand.Among the next-generation electrodes, lithium metal anodes are strong candidates because of their high theoretical capacity and the most negative electrochemical potential.However, lithium metal batteries have been abandoned because of their poor safety resulting from the growth of lithium dendrites during lithium deposition.Although several strategies have been proposed to suppress the generation of lithium dendrites as well as the side reactions between active lithium and the electrolyte, lithium metal anodes have not been practically applied so far.Various studies have been conducted on the factors influencing lithium deposition, with the aim of understanding the growth behavior of lithium dendrites.The electrolyte plays a crucial role in the performance of the working Li metal anode.In this study, a unique battery system is proposed to realize columnar lithium deposition, which is convenient for obtaining the length and diameter of lithium deposits.The influence of different electrolytes on lithium deposition was investigated by comparing the length-diameter (L/D) ratio of the lithium deposits in two kinds of electrolytes (1.0 mol•L -1 LiPF6-ethylene carbonate/diethyl carbonate (EC/DEC, 1 : 1 by volume) and 1.0 mol•L -1 LiPF6-5% (volume fraction) fluoroethylene carbonate (FEC)-EC/DEC (1 : 1 by volume)).The morphology of the lithium deposits was strongly affected by the electrolyte composition.In the electrolyte with the FEC additive, the diameter of columnar lithium increased from 0.3-0.6 μm to 0.7-1.3μm, while the L/D ratio decreased from 12.5 to 5.6.The small L/D ratio can reduce the reactive area between the lithium metal anode and the electrolyte, which is beneficial for achieving high lithium utilization and a long lifespan.To probe the origin of this influence, the surface chemistry of the cycled lithium metal anode was investigated by X-ray photoelectron spectroscopy.The FEC additive can increase the proportion of lithium fluoride (LiF) in the solid electrolyte interphase, which is conducive for the rapid diffusion of lithium ions.As a result, fewer nucleation sites are formed, providing more space for the growth of lithium cores with a large diameter.Therefore, the addition of FEC leads to a decrease in the L/D ratio of columnar lithium.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
1秒前
2秒前
my发布了新的文献求助10
2秒前
GreyHeron完成签到,获得积分10
3秒前
Lerler发布了新的文献求助10
4秒前
llllllll完成签到,获得积分10
4秒前
4秒前
ting发布了新的文献求助10
5秒前
SYLH应助多喝水我采纳,获得10
6秒前
wanci应助王学成采纳,获得10
6秒前
小小怪完成签到 ,获得积分10
8秒前
乌梅丸完成签到,获得积分10
8秒前
8秒前
香潘潘的楠瓜完成签到,获得积分10
9秒前
冷酷豌豆完成签到,获得积分10
11秒前
11秒前
11秒前
不开心发布了新的文献求助30
11秒前
可爱的函函应助GreyHeron采纳,获得10
12秒前
log发布了新的文献求助10
13秒前
旺仔不甜完成签到,获得积分10
14秒前
111发布了新的文献求助30
16秒前
Chen完成签到,获得积分10
18秒前
不开心完成签到,获得积分10
19秒前
温暖的怀蝶完成签到 ,获得积分10
21秒前
21秒前
23秒前
一枚松果完成签到 ,获得积分10
23秒前
luxi0714完成签到,获得积分20
23秒前
my完成签到,获得积分10
25秒前
26秒前
111完成签到,获得积分20
29秒前
MS903发布了新的文献求助10
30秒前
slb1319完成签到,获得积分10
30秒前
30秒前
慕青应助WD采纳,获得10
33秒前
ting完成签到,获得积分10
33秒前
34秒前
35秒前
高分求助中
Ophthalmic Equipment Market by Devices(surgical: vitreorentinal,IOLs,OVDs,contact lens,RGP lens,backflush,diagnostic&monitoring:OCT,actorefractor,keratometer,tonometer,ophthalmoscpe,OVD), End User,Buying Criteria-Global Forecast to2029 2000
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 588
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3962406
求助须知:如何正确求助?哪些是违规求助? 3508495
关于积分的说明 11141362
捐赠科研通 3241248
什么是DOI,文献DOI怎么找? 1791412
邀请新用户注册赠送积分活动 872861
科研通“疑难数据库(出版商)”最低求助积分说明 803417