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LiBEST²
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LiBEST²

Lithium Battery Concepts with High Energy Density, Power and Safety

LiBEST²

Project Information:

  • 3 years (01.10.2020 - 31.10.2023)
  • BMBF (03XP0304)
  • Funding: 0.33 Mio € (TUBS)
  • Total Project Volume: 1.18 Mio €

Project Partner:

  • HI MS (Helmholtz Institute Münster)

  • MEET Münster

  • Fraunhofer IWS (Institut für Werkstoff- und Strahltechnik)

  • NTU (National Taiwan University)

  • NTUST (National Taiwan University of Science and Technology)


Motivation

In recent years lithium-ion battery technology has gained much attention but with currently used active materials a further enhancement of its capacity is limited. Therefore, research has originated many different materials for both anode and cathode side which exhibit high specific capacities. However, the implementation of these new materials remains difficult because they encompass a number of challenges. Within this project two promising anode materials (silicon carbon composites, lithium metal) and two promising cathode materials (Ni-rich NCM, Li2S) are going to be investigated. The main goal is to build a lithium ion battery with good electrochemical performance and high safety characteristics by controlling the surface characteristics and structure of the active material particles.

 

Project description

Within the project, the iPAT deals with the preparation of silicon nanoparticles and silicon graphite composite particles. Silicon nanoparticles are prepared by grinding in stirred media mills. The use of ground silicon nanoparticles (x50 ≤ 150 nm) is beneficial towards larger particles because the absolute volumetric expansion of silicon during lithiation is a function of particle size. The granulations are performed by fluidized bed granulation. Within this process the beforehand produced silicon nanoparticles are deposited on the surface of coarser graphite particles. The resulting composite structure has a major impact on the mechanical stability and electrochemical performance of the electrode. Therefore, the influence of process parameters and composition on structural, mechanical, electrical and electrochemical properties are investigated.


Contact:

Jannes Müller
jannes.mueller(at)tu-braunschweig.de

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