The development of cathode materials represents the key bottleneck to further push the performance of current Liion batteries (LIB) beyond the commercial benchmark. Li-rich transition-metal-layered oxides (LRLOs) are a promising class of materials to use as high-capacity/high-potential positive electrodes in LIBs thanks to the large lithium content (e.g., ∼1.2 Li equiv per formula unit) and the exploitation of multiple redox couples (e.g., Mn4+/3+, Co4+/3+, Ni4+/3+/2+). In this work, we propose and demonstrate experimentally a Co-free overlithiated LRLO material with a limited nickel content, i.e., Li1.25Mn0.625Ni0.125O2. This LRLO is able to exchange reversibly an outstanding practical specific capacity at room temperature, i.e., 230 mAh g−1 at C/10 for almost 200 cycles, and can sustain high current rates, i.e., 118 mAh g−1 at 2C. This material has been successfully prepared by a facile solution combustion synthesis and characterized by scanning electron microscopy (SEM), X-ray photoemission spectroscopy (XPS), X-ray absorption near-edge spectroscopy (XANES), X-ray diffraction (XRD), and Raman techniques. Overall, our positive electrodes based on Li1.25Mn0.625Ni0.125O2 overlithiated Co-free LRLO is a step forward in the development of the materials for batteries with improved performance and better environmental fingerprint.

Exploring a Co-free, Li-Rich layered oxide with low content of nickel as a positive electrode for Li-Ion battery / Celeste, Arcangelo; Tuccillo, Mariarosaria; Santoni, Antonino; Reale, Priscilla; Brutti, Sergio; Silvestri, Laura. - In: ACS APPLIED ENERGY MATERIALS. - ISSN 2574-0962. - 4:10(2021), pp. 11290-11297. [10.1021/acsaem.1c02133]

Exploring a Co-free, Li-Rich layered oxide with low content of nickel as a positive electrode for Li-Ion battery

Celeste, Arcangelo;Tuccillo, Mariarosaria;Brutti, Sergio;
2021

Abstract

The development of cathode materials represents the key bottleneck to further push the performance of current Liion batteries (LIB) beyond the commercial benchmark. Li-rich transition-metal-layered oxides (LRLOs) are a promising class of materials to use as high-capacity/high-potential positive electrodes in LIBs thanks to the large lithium content (e.g., ∼1.2 Li equiv per formula unit) and the exploitation of multiple redox couples (e.g., Mn4+/3+, Co4+/3+, Ni4+/3+/2+). In this work, we propose and demonstrate experimentally a Co-free overlithiated LRLO material with a limited nickel content, i.e., Li1.25Mn0.625Ni0.125O2. This LRLO is able to exchange reversibly an outstanding practical specific capacity at room temperature, i.e., 230 mAh g−1 at C/10 for almost 200 cycles, and can sustain high current rates, i.e., 118 mAh g−1 at 2C. This material has been successfully prepared by a facile solution combustion synthesis and characterized by scanning electron microscopy (SEM), X-ray photoemission spectroscopy (XPS), X-ray absorption near-edge spectroscopy (XANES), X-ray diffraction (XRD), and Raman techniques. Overall, our positive electrodes based on Li1.25Mn0.625Ni0.125O2 overlithiated Co-free LRLO is a step forward in the development of the materials for batteries with improved performance and better environmental fingerprint.
2021
lithium-rich layered oxides; Li-ion battery; cathode; Co-free; electrochemical performance
01 Pubblicazione su rivista::01a Articolo in rivista
Exploring a Co-free, Li-Rich layered oxide with low content of nickel as a positive electrode for Li-Ion battery / Celeste, Arcangelo; Tuccillo, Mariarosaria; Santoni, Antonino; Reale, Priscilla; Brutti, Sergio; Silvestri, Laura. - In: ACS APPLIED ENERGY MATERIALS. - ISSN 2574-0962. - 4:10(2021), pp. 11290-11297. [10.1021/acsaem.1c02133]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1573516
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