How to Digest Lithium-Ion Battery Materials using Rotor 20SVT50 in Multiwave 5000

Rotor 20SVT50 with SmartVent technology allows the safe and convenient digestion of various Li-Ion battery components for subsequent elemental analysis

Introduction

The global market for rechargeable batteries is largely driven by the increasing demand in electric vehicles, grid storage and portable consumer devices, in which the outstanding high cell energy density of the lithiumion battery offers outstanding advantages.

Research and Development departments are steadily developing alternative high energy density materials for new battery types. In addition, QA/QC requirements are becoming more stringent for Li-ion battery producers as well.

It is very important to determine the exact and consistent element composition of the electrode raw materials during development and quality control in battery manufacturing, as these affect performance and possibly safety of the end products. In addition concentrations of impurity levels must also be accurately measured in the battery components. Impurities can deteriorate the electrochemical stability, influence the efficiency and, in worst case, can cause short circuits and shorten battery life time drastically. Elemental analysis of Li-ion battery compounds is performed with ICP-OES for composition analysis and ICP-MS for contamination analysis – both techniques require adequately digested samples. Microwaveassisted acid digestion is the optimum tool to prepare these very different samples.

Rotor 20SVT50 in Multiwave 5000 provides the already well-established SmartVent technology, but at higher pressure and temperature limits. Controlled overpressure release is a safe and convenient way to overcome temperature challenges, as target temperatures of up to 250 °C can be reached and maintained to ensure complete digestions.

With up to 20 samples in one single run, Rotor 20SVT50 offers unrivaled efficiency. The convenient tool-free handling and the compact vessel design to ease weighing, cleaning and operation make Rotor 20SVT50 the ideal candidate for demanding samples in Multiwave 5000.

In order to demonstrate the suitability of Rotor 20SVT50 different cathode and anode materials as well as a conductive additive and separators were digested in several runs.

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