Mitigating the Surface Degradation and Voltage Decay of Li1.2Ni0.13Mn0.54Co0.13O2 Cathode Material through Surface Modification Using Li2ZrO3.
Kunkanadu R. Prakasha,Marappan Sathish,Parthasarathi Bera,Annigere S. Prakash +3 more
- Vol. 2, Iss: 5, pp 2308-2316
TLDR
Electrochemical impedance spectroscopy reveals that the LZO coating plays a vital role in stabilizing the interface between the electrode and electrolyte during cycling; thus, it alleviates material degradation and voltage fading and ameliorates the electrochemical performance.Abstract:
In the quest to tackle the issue of surface degradation and voltage decay associated with Li-rich phases, Li-ion conductive Li2ZrO3 (LZO) is coated on Li1.2Ni0.13Mn0.54Co0.13O2 (LNMC) by a simple wet chemical process. The LZO phase coated on LNMC, with a thickness of about 10 nm, provides a structural integrity and facilitates the ion pathways throughout the charge–discharge process, which results in significant improvement of the electrochemical performances. The surface-modified cathode material exhibits a reversible capacity of 225 mA h g–1 (at C/5 rate) and retains 85% of the initial capacity after 100 cycles. Whereas, the uncoated pristine sample shows a capacity of 234 mA h g–1 and retains only 57% of the initial capacity under identical conditions. Electrochemical impedance spectroscopy reveals that the LZO coating plays a vital role in stabilizing the interface between the electrode and electrolyte during cycling; thus, it alleviates material degradation and voltage fading and ameliorates the elec...read more
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Journal ArticleDOI
Li-Rich Layered Oxides and Their Practical Challenges: Recent Progress and Perspectives
Sijiang Hu,Sijiang Hu,Anoop Somanathan Pillai,Gemeng Liang,Wei Kong Pang,Hongqiang Wang,Qingyu Li,Zaiping Guo +7 more
TL;DR: Li2MnO3 as mentioned in this paper has been regarded as some of the highest capacity lithium cathodes and has attracted increasing attention from battery researchers and engineers in recent years, however, these cathodes have not yet been successfully commercialized due to low initial Coulombic efficiency, poor rate capabilities and gradual capacity/voltage fade during electrochemical cycling as well as further complications from continuous structural changes during cycling.
Journal ArticleDOI
Synthesis of Li-Rich NMC: A Comprehensive Study
Vanessa Pimenta,Mariyappan Sathiya,Dmitry Batuk,Artem M. Abakumov,Domitille Giaume,Sophie Cassaignon,Dominique Larcher,Jean-Marie Tarascon +7 more
TL;DR: In this article, the authors revisited the elaboration of Li-rich NMC electrodes by focusing on the science involved through each synthesis steps using carbonate Ni0.1625Mn0.675Co0.
Journal ArticleDOI
Li2ZrO3-Coated NCM622 for Application in Inorganic Solid-State Batteries: Role of Surface Carbonates in the Cycling Performance.
Florian Strauss,Jun Hao Teo,Julia Maibach,A-Young Kim,Andrey Mazilkin,Jürgen Janek,Jürgen Janek,Torsten Brezesinski +7 more
TL;DR: The best cycling performance was achieved for carbonate-deficient Li2ZrO3-coated NCM622 due to decreased degradation of the argyrodite solid electrolyte at the interfaces, as determined by ex situ X-ray photoelectron spectroscopy and in situ differential electrochemical mass spectrometry.
Journal ArticleDOI
A LiPF6-electrolyte-solvothermal route for the synthesis of LiF/LixPFyOz-coated Li-rich cathode materials with enhanced cycling stability
TL;DR: LiF/LixPFyOz-coated Li-rich cathode (sample LFP4) as discussed by the authors achieved a reversible discharge capacity of 210.7 mA h g−1 at 100 mA g −1 with 90.7% capacity retention after 100 cycles, while the uncoated sample LFP0 suffers from a rapid capacity fading and the capacity retention ratio is only 75.3%.
Journal ArticleDOI
Boosted electrochemical performance of LiNi0.5Mn1.5O4 via synergistic modification of Li+-Conductive Li2ZrO3 coating layer and superficial Zr-doping
TL;DR: Li et al. as discussed by the authors proposed an integrated modification strategy combing Li+conductive Li2ZrO3 coating layer with superficial Zr-doping to improve electron conductivity by inducing an appropriate amount of Mn3+.
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