亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Towards a Mechanistic Understanding of Transition-Metal Dissolution Phenomenon in Lithium-Ion Batteries

锂(药物) 溶解 离子 过渡金属 金属锂 现象 材料科学 无机化学 化学 物理化学 电解质 电极 有机化学 物理 催化作用 心理学 量子力学 精神科
作者
Ritu Sahore,Raymond R. Unocic,Marm Dixit,Mengya Li,Hunter Andrews,Benjamin Manard
出处
期刊:Meeting abstracts 卷期号:MA2024-01 (2): 420-420
标识
DOI:10.1149/ma2024-012420mtgabs
摘要

Dissolution of transition metals (TMs) from the layered NMC-type cathodes (LiNi x Mn y Co z O 2 ) occurs during cycling of lithium-ion full cells and is known to accelerate their capacity fade. This is because the dissolved metals migrate to the graphite anode and deposit there, where they accelerate irreversible active-lithium loss to reductive side reactions. The dissolution is known to get aggravated by cycling the cells to a greater upper cut-off voltage (UCV), where larger amounts of metals are typically found to be accumulated at the anode after long term cycling. At higher UCV oxygen loss from the cathode lattice also gets accelerated causing changes in the layered crystal structure at the surface level to a rock-salt and spinel mixture which has a very high impedance for Li-ion transport. Several other phenomena get accelerated as well, such as proton generation, and solvent decomposition etc. However, a complete mechanistic understanding of the how these phenomena impact the TM dissolution is lacking. For example, it is unclear whether the dissolution can occur in the charged state when the metals are in the oxidized state despite the presence of large number of acidic species, especially since most of the dissolved metal species typically detected in the electrolyte are in lower oxidation state. In this study, this question was targeted by aging the full graphite//NMC cells via long potentiostatic holds at UCV with/without any discharge steps, and recording the dissolved metals deposited at the graphite after aging. It is shown that a much greater amounts are deposited at the anode when discharge steps are included. Atomic structural changes from TM dissolution at the cathode surface corresponding to the two aging protocols in the charged/discharged state will also be presented. This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy (DOE) through Cathode-Electrolyte Interphase (CEI) Consortium. Part of the measurements was performed at the Center for Nanophase Materials Sciences (CNMS), which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences.

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
CodeCraft应助Benhnhk21采纳,获得30
1秒前
30秒前
Benhnhk21发布了新的文献求助30
36秒前
科研通AI2S应助科研通管家采纳,获得10
1分钟前
村口的帅老头完成签到 ,获得积分0
2分钟前
2分钟前
gincle完成签到 ,获得积分10
2分钟前
2分钟前
andrele发布了新的文献求助10
2分钟前
2分钟前
2分钟前
积极的台灯完成签到,获得积分10
3分钟前
紫荆完成签到,获得积分10
3分钟前
Johnson完成签到 ,获得积分10
3分钟前
李健应助科研通管家采纳,获得10
3分钟前
Benhnhk21发布了新的文献求助10
3分钟前
wanci应助淡然绝山采纳,获得10
3分钟前
4分钟前
wkjfh应助YaoQi采纳,获得10
4分钟前
dyuguo3完成签到 ,获得积分10
5分钟前
某某某发布了新的文献求助10
5分钟前
5分钟前
淡然绝山发布了新的文献求助10
5分钟前
Benhnhk21完成签到,获得积分10
5分钟前
JamesPei应助andrele采纳,获得10
5分钟前
完美世界应助xiongdi521采纳,获得10
6分钟前
6分钟前
6分钟前
xiongdi521发布了新的文献求助10
6分钟前
6分钟前
xiao涂完成签到,获得积分10
7分钟前
7分钟前
闫雪发布了新的文献求助10
7分钟前
打打应助闫雪采纳,获得10
7分钟前
吗喽完成签到,获得积分10
7分钟前
某某某完成签到,获得积分10
7分钟前
7分钟前
爱吃橙子完成签到 ,获得积分10
7分钟前
丰富莹芝发布了新的文献求助10
7分钟前
思源应助丰富莹芝采纳,获得10
8分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
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 3990171
求助须知:如何正确求助?哪些是违规求助? 3532136
关于积分的说明 11256472
捐赠科研通 3271042
什么是DOI,文献DOI怎么找? 1805171
邀请新用户注册赠送积分活动 882302
科研通“疑难数据库(出版商)”最低求助积分说明 809234