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Luca Lieb, M.Eng.

Centre for Applied Research

Technology Campus Plattling MoMo

Academic Staff

TC Plattling

0991/3615-8608

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Lecture
  • Luca Lieb
  • Anika Wolters
  • Michael Furtmair
  • M. Thannhuber
  • Günther Ruhl
  • Michael Sternad

The Influence of Dry Air on Lithium Metal Batteries. Poster presentation.

In: 245th ECS Meeting (Seeding and Growing Plain Li-Metal Surfaces - New Approaches to Increase the Coulombic Efficiency of Anodeless Lithium-Metal Batteries)

The Electrochemical Society, Inc. San Francisco, CA, USA

  • 26.-30.05.2024 (2024)
Lecture
  • Luca Lieb
  • Michael Furtmair
  • P. Hawe
  • Anika Wolters
  • M. Thannhuber
  • Günther Ruhl
  • Michael Sternad

Seeding and Growing Plain Li-Metal Surfaces - New Approaches to Increase the Coulombic Efficiency of Anodeless Lithium-Metal Batteries.

In: 245th ECS Meeting

The Electrochemical Society, Inc. San Francisco, CA, USA

  • 29.05.2024 (2024)

show abstract

In the pursuit of higher energy densities, lithium-ion batteries with lithium metal anode appear as one particular promising technology. Especially the option to plate non-dendritic, superficially even Li-layers [1] directly onto the current collector of the negative electrode without the use of an anode active material (“anode-less battery design”) should enable gravimetric energy densities of up to 400 Wh/kg [2] and 1200 Wh/l [3] in future cell systems [4]. In the presented work, Swagelok-cells in “anode-less” configuration, comprising a NMC 811-cathode and an ether-based electrolyte containing 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) and 1,2-dimethoxyethane (DME) in 1.2:3 molar ratio, 1.5 M LiFSI [2] were cycled under the application of pressure (up to 400 kPa) onto the cell stack. As the proper formation of Li-nuclei (number, morphology, etc.) and the even growth of lithium-layers onto the Cu-based anode (Figure 1) seems from great importance to plate and stripe Li-metal at high coulombic efficiencies, several charging programs with presumably Li-nucleation promoting effects were tested in a cycling experiment along 50 full cycles (Figure 2). As a promising result and as clear improvement compared to standard charging processes (e.g. 0.1 C), average coulombic efficiencies as high as 99.2 % together with low capacity fading were observed. Due to the design-related limitation of Swagelok-based cells and a noticeable diffusion of air fractions (N2, O2, H2O) across the PFA-seals into the cell, in a second experimental part the influence of ambient air on the cycling performance was tested under three conditions (Figure 2, left, middle and right diagram): a) Cells cycling in common (humid), laboratory air, b) under dry air (P2O5) in sealed steel-containers and c) inside an argon filled glovebox (< 0.1 ppm H2O, < 0.1 ppm O2). As a result, a strong sensitivity of operating Li-metal cells not solely versus traces of ambient, humid air, but also versus P2O5-dried nitrogen and oxygen was obvious.
Lecture
  • Luca Lieb
  • Benedikt Winter
  • Anika Wolters
  • Günther Ruhl
  • Michael Sternad

Improved Lithium Metal Deposition on Nanometer Thin TiO2 | Cu - Layers Prepared by Pulsed Laser Deposition. Posterpräsentation.

In: 247th ECS Meeting

The Electrochemical Society (ECS), Inc. Montréal, Canada

  • 18.-22.05.2025 (2025)