Single-Particle Elemental Analysis of μm-Sized Battery Materials by Laser Ablation Inductively Coupled Plasma Mass Spectrometry

被引:0
|
作者
Seiffert, Svenja B. [1 ]
Riewald, Felix F. [2 ]
Berk, Rafael B. [2 ]
机构
[1] BASF SE, Analyt & Mat Sci, D-67056 Ludwigshafen, Germany
[2] BASF SE, Global R&D Battery Mat, D-67056 Ludwigshafen, Germany
关键词
batteries; -; lithium; Li-ion; NCM; LA-ICP MS; laser; nickel cobalt manganese; CAM; ICP-MS; MULTIELEMENT ANALYSIS; LITHIUM; NICKEL; FRACTIONATION; MANGANESE; COBALT;
D O I
10.1149/1945-7111/ad4395
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Lithium-nickel-manganese-cobalt-oxides (NCMs) represent a preeminent class of cathode active materials for employment in commercially available lithium-ion battery applications. To realize large-scale production of the respective NCM precursors, coprecipitation is often conducted in continuous stirred-tank reactors (CSTR). However, precursors coming from CSTR processes show broad particle size distributions and undesired compositional differences within and between particles. To quantify this phenomenon, it is necessary to develop analytical tools to access quantitative data on particle composition depending on their size. Here, we demonstrate a novel application of single particle laser ablation-inductively coupled plasma-mass spectrometry to determine particle size-dependent elemental compositions by exemplary investigation of CSTR-based NCM precursors. An enrichment of Ni in larger particles with a concomitant enrichment of Co and Mn in smaller particles was identified. This compositional differences between particles persisted after calcination of the precursors with lithium hydroxide. The observed particle size-dependent concentration differences by spLA-ICP-MS were validated by scanning electron microscopy with energy-dispersive X-ray analysis.
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页数:9
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