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  4. Mechanistic insights into the reversible lithium storage in an open porous carbon via metal cluster formation in all solid-state batteries
 
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2022
Journal Article
Title

Mechanistic insights into the reversible lithium storage in an open porous carbon via metal cluster formation in all solid-state batteries

Abstract
Porous carbons are promising anode materials for next generation lithium batteries due to their large lithium storage capacities. However, their highsloping capacity during lithiation and delithiation as well as capacity fading due to intense formation of solid electrolyte interphase (SEI) limit their gravimetric and volumetric energy densities. Herein we compare a microporous carbide-derived carbon material (MPC) as promising future anode for all solid-state batteries with a commercial high-performance hard carbon anode. The MPC obtains high and reversible lithiation capacities of 1000 mAh g−1carbon in half-cells exhibiting an extended plateau region near 0 V vs. Li/Li+ preferable for full-cell application. The well-defined microporosity of the MPC with a specific surface area of >1500 m2 g−1 combines well with the argyrodite-type electrolyte (Li6PS5Cl) suppressing extensive SEI formation to deliver high coulombic efficiencies. Preliminary full-cell measurements vs. nickel-rich NMC-cathodes (LiNi0.9Co0.05Mn0.05O2) provide a considerably improved average potential of 3.76 V leading to a projected energy density as high as 449 Wh kg−1 and reversible cycling for more than 60 cycles. 7Li Nuclear Magnetic Resonance spectroscopy was combined with ex-situ Small Angle X-ray Scattering to elucidate the storage mechanism of lithium inside the carbon matrix. The formation of extended quasi-metallic lithium clusters after electrochemical lithiation was revealed.
Author(s)
Bloi, Luise Maria
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Hippauf, Felix  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Boenke, Tim
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Rauche, Marcus
TU Dresden
Paasch, Silvia
TU Dresden
Schutjajew, Konstantin
Max-Planck-Institut Potsdam / Friedrich-Schiller-Universität Jena
Pampel, Jonas
Max-Planck-Institut Potsdam
Schwotzer, Friedrich
TU Dresden
Dörfler, Susanne  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Althues, Holger  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Oschatz, Martin
Max-Planck-Institut Potsdam / Friedrich-Schiller-Universität Jena
Brunner, Eike
TU Dresden
Kaskel, Stefan  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Journal
Carbon  
Open Access
DOI
10.1016/j.carbon.2021.11.061
Language
English
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Keyword(s)
  • all solid state battery

  • microporous carbon

  • lithium battery

  • Anode

  • carbide-derived carbon

  • Lithium cluster

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