We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
LiNi<sub>1</sub><sub>/</sub><sub>3</sub>Mn<sub>1</sub><sub>/</sub><sub>3</sub>Co<sub>1</sub><sub>/</sub><sub>3</sub>O<sub>2</sub> with morphology optimized for novel concept of 3D Li accumulator.
- Authors
Zukalová, Markéta; Zukal, Arnošt; Krýsová, Hana; Kavan, Ladislav; Procházka, Jan
- Abstract
Summary: An array of LiNi1/3Mn1/3Co1/3O2 (NMC 111) samples with a hollow‐sphere morphology enabling the use of binder‐free, millimeter‐thick electrodes in a battery are prepared by a combination of ball milling, hydrothermal treatment and calcination. Materials are studied by powder X‐ray diffraction, nitrogen adsorption measurements, X‐ray fluorescence analysis, and scanning electron microscopy. Their electrochemical performance for Li+ extraction/insertion is tested by cyclic voltammetry and galvanostatic chronopotentiometry on thin‐film electrodes. Optimized materials, prepared by mechanical and thermal treatment with surface areas of 7 to 10 m2 g−1, provide charge capacity values of 141 to 156 mAh g−1. The concentration of the crystalline phase in NMC 111 materials with a hollow‐sphere morphology is found to be the decisive parameter for their galvanostatic cycling stability. Hollow spheres with well‐developed NMC nanocrystals and a low concentration of amorphous phase in the walls, exhibiting excellent cycling stability and charge capacity in thin‐film electrodes are incorporated into a NMC/graphite 3D‐battery module. This 122 Ah/451 Wh 3D‐battery provides 78% of theoretical capacity and 73% of theoretical energy after 10 formatting cycles. Additionally, the battery prototype exhibits stable performance over more than 200 cycles at C/10 rate. A series of analogous 3D Li accumulators, currently assembled and tested in a pilot plant, represent the first step toward large‐scale production of novel 3D Li accumulator.
- Subjects
X-ray spectroscopy; X-ray powder diffraction; PILOT plants; SCANNING electron microscopy; CYCLIC voltammetry; CHRONOAMPEROMETRY; GRAPHITE; SUPERCAPACITOR electrodes
- Publication
International Journal of Energy Research, 2020, Vol 44, Issue 11, p9082
- ISSN
0363-907X
- Publication type
Article
- DOI
10.1002/er.5630