Molecular Surface Modification of NCM622 Cathode Material Using Organophosphates for Improved Li-Ion Battery Full-Cells

材料科学 表面改性 阴极 电池(电) 化学工程 锂离子电池 离子 纳米技术 有机化学 化学 量子力学 物理 工程类 物理化学 功率(物理)
作者
Sven Neudeck,Felix Walther,Thomas Bergfeldt,Christian Suchomski,Marcus Rohnke,Pascal Hartmann,Jürgen Janek,Torsten Brezesinski
出处
期刊:ACS Applied Materials & Interfaces [American Chemical Society]
卷期号:10 (24): 20487-20498 被引量:77
标识
DOI:10.1021/acsami.8b04405
摘要

Surface coating is a viable strategy for improving the cyclability of Li1+x(Ni1–y–zCoyMnz)1–xO2 (NCM) cathode active materials for lithium-ion battery cells. However, both gaining synthetic control over thickness and accurate characterization of the surface shell, which is typically only a few nm thick, are considerably challenging. Here, we report on a new molecular surface modification route for NCM622 (60% Ni) using organophosphates, specifically tris(4-nitrophenyl) phosphate (TNPP) and tris(trimethylsilyl) phosphate. The functionalized NCM622 was thoroughly characterized by state-of-the-art surface and bulk techniques, such as attenuated total reflection infrared spectroscopy, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry (ToF-SIMS), to name a few. The comprehensive ToF-SIMS-based study comprised surface imaging, depth profiling, and three-dimensional visualization. In particular, tomography is a powerful tool to analyze the nature and morphology of thin coatings and is applied, to our knowledge, for the first time, to a practical cathode active material. It provides valuable information about relatively large areas (over several secondary particles) at high lateral and mass resolution. The electrochemical performance of the different NCM622 materials was evaluated in long-term cycling experiments of full-cells with a graphite anode. The effect of surface modification on the transition-metal leaching was studied ex situ via inductively coupled plasma optical emission spectroscopy. TNPP@NCM622 showed reduced transition-metal dissolution and much improved cycling performance. Taken together, with this study, we contribute to optimization of an industrially relevant cathode active material for application in high-energy-density lithium-ion batteries.
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
2秒前
輕瘋完成签到,获得积分10
4秒前
5秒前
Tonald Yang发布了新的文献求助10
5秒前
强公子完成签到,获得积分10
6秒前
6秒前
rh完成签到,获得积分10
6秒前
9秒前
Ivy完成签到,获得积分10
11秒前
11秒前
落后十八完成签到,获得积分10
13秒前
vbnn发布了新的文献求助30
13秒前
LHT发布了新的文献求助10
13秒前
落后乐荷完成签到,获得积分10
14秒前
piaoaxi完成签到 ,获得积分10
14秒前
妮妮完成签到,获得积分10
15秒前
前进中完成签到,获得积分10
16秒前
韭菜盒子发布了新的文献求助10
17秒前
17秒前
Q22发布了新的文献求助10
17秒前
鲁丁丁完成签到 ,获得积分10
18秒前
jason完成签到,获得积分10
19秒前
mike2012完成签到 ,获得积分10
19秒前
KINGAZX完成签到 ,获得积分10
22秒前
LHT完成签到,获得积分10
23秒前
研友_VZG7GZ应助韭菜盒子采纳,获得10
23秒前
CLY完成签到,获得积分10
25秒前
Q22完成签到,获得积分10
25秒前
weiyayayayayaya完成签到,获得积分10
25秒前
CAOHOU应助虚心的芹采纳,获得10
26秒前
折花几慕应助虚心的芹采纳,获得20
26秒前
折花几慕应助虚心的芹采纳,获得20
26秒前
大胆砖头完成签到 ,获得积分10
26秒前
celia完成签到 ,获得积分10
26秒前
Beyond095完成签到,获得积分10
27秒前
搜集达人应助Q22采纳,获得10
29秒前
29秒前
万能图书馆应助夏傥采纳,获得10
31秒前
研友_X894JZ完成签到 ,获得积分10
31秒前
量子星尘发布了新的文献求助10
32秒前
高分求助中
Semantics for Latin: An Introduction 1155
Genomic signature of non-random mating in human complex traits 1000
Plutonium Handbook 1000
Three plays : drama 1000
Robot-supported joining of reinforcement textiles with one-sided sewing heads 600
SPSS for Windows Step by Step: A Simple Study Guide and Reference, 17.0 Update (10th Edition) 500
Multimodal injustices: Speech acts, gender bias, and speaker’s status 400
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 4106192
求助须知:如何正确求助?哪些是违规求助? 3644100
关于积分的说明 11542941
捐赠科研通 3351096
什么是DOI,文献DOI怎么找? 1841209
邀请新用户注册赠送积分活动 907950
科研通“疑难数据库(出版商)”最低求助积分说明 825090