Is Aluminium Useful in NiMn Cathode Systems?: A Study of the Effectiveness of Al in Co-Free, Ni-Rich Positive Electrode Materials for Li-Ion Batteries

被引：2

作者：

Hamam, Ines ^{[1
]}

Omessi, Roee ^{[2
]}

Ball, Mitchell ^{[3
]}

Dahn, J. R. ^{[1
,3
,4
]}

机构：

[1] Dalhousie Univ, Dept Mech Engn, Halifax, NS B3H 4R2, Canada

[2] Dalhousie Univ, Dept Elect Engn, Halifax, NS B3H 4R2, Canada

[3] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4R2, Canada

[4] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2024年 / 171卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

batteries; -; Li-ion; aluminum doping; Co-free Ni-rich positive electrode materials; diffusivity; thermal stability; electrochemical performance; DEGRADATION; STABILITY;

D O I：

10.1149/1945-7111/ad4e73

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Aluminium has become a dopant of interest in many positive electrode materials, particularly the widely used LiNi1-x-yMnxCoyO2 (NMC). Despite the shift of the positive electrode active material space towards Co-free alternatives, the benefits of Al-doping in Co-free LiNixMn1-xO2 (NM) systems have yet to be extensively studied. In this work a series of polycrystalline NM and NMA pairs are compared head-to-head to better understand the effect of Al in Ni-rich, Co-free systems in terms of electrochemical, mechanical, surficial, and thermal stability. The materials tested vary in Ni-content, Al-doping amount as well as secondary particle size, as these parameters influence the effect of Al-presence on certain aspects of material performance. Although Al can bring certain advantages to NM materials, Al-substitution does not universally lead to improved performance in these systems.

引用

页数：15