Journal Article

FZJ-2022-01810

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cold Sintered LiMn2O4 for High-Rate Capability Electrodes

Nur, K. (Corresponding author)FZJ* ; Roitzheim, C.FZJ* ; Finsterbusch, M.FZJ* ; Bram, M.FZJ* ; Guillon, O.FZJ*

2022
IOP Publishing Bristol

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/31067  doi:10.1149/1945-7111/ac5348

Abstract: This study provides for the first time a detailed investigation of the cold sintering of LiMn2O4 (LMO). Aqueous based cold sintering aid facilitated densification of LMO at lower temperature range of 400 °C to 600 °C within a dwell time of merely 1 min to the relative density of 70%–80%, without any non—stoichiometry or the need of post annealing in air atmosphere. Connected porosity was observed in the cold sintered structure as confirmed by Mercury porosimetry and scanning electron microscopy analysis. Cold sintered and dry milled LMO delivered a specific discharge capacity of 121 mAh g−1 for the first discharge cycle at 0.1 C with an appreciably low capacity drop to 107 mAh g−1 at 15 C. In contrast, LMO powder, without any cold sintering treatment, provided merely 84 mAh g−1 at 0.1 C as initial discharge capacity and only 6 mAh g−1 at 2 C. This difference was interpreted as the removal/thinning of insulating Li2CO3 layer from the LMO particles after being cold sintered as confirmed by X-ray diffraction, thermal analysis and Raman spectroscopy.

---

Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 1222 - Components and Cells (POF4-122) (POF4-122)
2. DFG project 319339707 - Diffusionsgesteuerte Prozesse in polykristallinem Ceroxid: Kombinierte Wirkung von elektrischem Feld und mechanischer Belastung (319339707)

Appears in the scientific report 2022

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---