Enhanced performance of a Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode material formed through Taylor flow synthesis and surface modification with Li2MoO4

Babulal, Lakshmipriya Musuvadhi; Yang, Chun‐Chen; Wu, She‐Huang; Chien, Wen-Chen; Jose, Rajan; Lue, Shingjiang Jessie

doi:10.1016/j.cej.2020.127150

Cited by 41 publications

(10 citation statements)

References 43 publications

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“…The Warburg impedance of EIS in low frequency region is related to the diffusion rate of lithium ion in SC and CG electrodes. The calculation formula of diffusion coefficient is as follows 26,27 .…”

Section: Resultsmentioning

confidence: 99%

Diffusion coefficient analysis of aluminum electrolysis spent cathode as anode material for lithium-ion battery

Huang

Peng

et al. 2022

Ionics

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The aluminum electrolysis spent cathode (SC) was treated by hydrothermal method and used as anode material for lithium-ion battery. The purified SC material shows excellent electrochemical performance. In order to understand the diffusion behavior of Li + in the SC electrode, the diffusion coefficient of Li + in the SC electrode was systematically analyzed by galvanostatic intermittent titration technique (GITT), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results show that the diffusion coefficient (D Li + ) of Li + in SC electrode is calculated by CV is 2.2292×10 -11 cm 2 •s -1 , which is calculated by GITT and EIS ranges are 4.2286×10 -13 -2.9667×10 -10 cm 2 •s -1 , 4.05×10 -13 -3.87×10 -12 cm 2 •s -1 , respectively. SC electrode exhibits better Li + diffusion kinetics compared to commercial graphite (CG). In addition, the full cell of LiNi0.5Co0.2Mn0.3O2/SC also shows excellent cycle performance. After 80 cycles at 1 C (1 C=172 mA•g -1 ), the specific discharge capacity of LiNi0.5Co0.2Mn0.3O2/SC full-cell can reach 94.7 mAh•g -1 , and the capacity retention can reach 98.13%. The fast lithium-ion diffusion rate and high discharge capacity provide a feasible direction for the high value utilization of aluminum electrolysis spent cathode.

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Section: Resultsmentioning

confidence: 99%

Diffusion coefficient analysis of aluminum electrolysis spent cathode as anode material for lithium-ion battery

Huang

Peng

et al. 2022

Ionics

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“…Moreover, the higher amount of the Ni 3+ ion content ensured a well-aligned structure and minimized microcracking during cycling. ,, As displayed in Figure d–f and Table S2, the Gauss–Lorentz curve fitting clearly shows the Co 2p binding energies of the profiles of Co 4+ and Co 3+ of all of the samples, but there were no significant differences concerning the Li excess.…”

Section: Results and Discussionmentioning

confidence: 85%

Effect of Li Excess on Electrochemical Performance of Ni-Rich LiNi_0.9Co_0.05Mn_0.05O₂ Cathode Materials for Li-Ion Batteries

Abebe

Yang

et al. 2021

ACS Appl. Energy Mater.

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Nickel-rich layered oxide cathode materials having a Ni content of ≥90% have great potential for use in next-generation lithium-ion batteries (LIBs) due to their high energy densities and relatively low cost. They suffer, however, from poor cycling performance and rate capability, significantly hampering their widespread applicability. In this study, we synthesized a Ni-rich precursor through a co-precipitation method and added different amounts of the Li excess on the precursors using a solid-state method to obtain sintered Li1+x (Ni0.9Co0.05Mn0.05)1–x O2 (denoted as L1+x -NCM; x = 0.00, 0.02, 0.04, 0.06, and 0.08) transition metal (TM) oxide cathode materials. The L1+x -NCM cathode having a Li excess of 4% exhibited a discharge capacity of ca. 216.17 mA h g–1 at 2.7–4.3 V, 0.1 C and retained 95.7% of its initial discharge capacity (ca. 181.39 mA h g–1) after 100 cycles of 1 C charge/discharge which is the best performance as compared with stoichiometric Li1+x (Ni0.9Co0.05Mn0.05)1–x O2 (i.e., x = 0, Li/TM = 1:1). Furthermore, a high-rate capability of ca. 162.92 mA h g–1 at a rate of 10 C led to the 4% Li excess, optimizing the electrochemical performance, relative to the other Li-excess samples. Ex/in situ X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy revealed that the 4% Li excess in the Ni-rich NCM90 cathode material (i) decreased the Li+/Ni2+ disorder by increasing the content of Ni3+ in the TM slab, (ii) increased the crystallinity, and (iii) accelerated Li+-ion transport by widening the Li slab. Furthermore, electrochemical impedance spectroscopy and cyclic voltammetry confirmed that the appropriate Li excess lowered the electrochemical impedance and improved the reversibility of the electrochemical reaction. Therefore, our results revealed that NCM90 cathode materials featuring an optimal Li excess are potential candidates for use in next-generation LIBs.

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“…The rapid development of electric vehicles requires Li-ion batteries with higher gravimetric and volumetric energy densities, which are mainly limited by the capacity and tap density of cathodes. , The Ni-rich layered oxides (LiNi x Co y Mn 1– x – y O 2 , x ≥ 0.5, NCM) are considered as promising candidates to satisfy such a requirement because of their superiority in discharge capacity compared to other commercial cathodes, such as spinel LiMn 2 O 4 , olivine LiFePO 4 , layered LiCoO 2 , etc. , Although high Ni content brings gratifying capacity property, it also easily leads to serious Li/Ni mixing (or Li/Ni disordering) . Li/Ni mixing affects nearly all of the aspects of electrochemical performance of Ni-rich layered cathodes, e.g., cycling stability, rate capability, discharge capacity, and thermal stability . In addition, Li/Ni mixing is also closely correlated with surface reconstruction and the cracking of secondary particle agglomerates. − Differently, a low degree of mixing is conducive to structural stability by mitigating the slab-distance contraction of the Ni-rich layered cathodes at high delithiation. , Thus, how to control Li/Ni mixing in a low value is very critical for the preparation of Ni-rich layered cathodes with excellent electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cationic Uniformity in Precursors on Li/Ni Mixing of Ni-Rich Layered Cathodes

et al. 2021

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Ni-rich layered oxides are promising cathodes to satisfy the long driving range of electric vehicles. However, Li/Ni mixing becomes a critical issue, which affects nearly all of the aspects of electrochemical performance of Ni-rich layered cathodes, such as cycling stability, rate capability, discharge capacity, and thermal stability. Herein, we investigate the effect of cationic uniformity in the precursors on Li/Ni mixing of Ni-rich layered cathodes. The cationic uniformity in precursors is regulated by the sol–gel and solvothermal method. All cations in the precursors obtained by the sol–gel method mix uniformly at a molecular scale, while the solvothermal method with a postaddition of Li salts causes a heterogeneous mixture between Li and transition-metal ions. Refined XRD and TEM results demonstrate that the NCM811 sample synthesized by the solvothermal method shows a higher Li/Ni mixing. This is because the inhomogeneous distribution of cations leads to local Li-poor regions, in which some Ni2+ ions are produced to keep charge neutrality, resulting in a serious Li/Ni mixing. Part of Ni ions in the Li layer suppresses the H2–H3 transition while it delivers a low capacity for increased electrode resistance. Therefore, advanced Ni-rich layered cathodes of the next-generation high-energy Li-ion batteries should simultaneously possess low Li/Ni mixing and reversible H2–H3 transition.

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Enhanced performance of a Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode material formed through Taylor flow synthesis and surface modification with Li2MoO4

Cited by 41 publications

References 43 publications

Diffusion coefficient analysis of aluminum electrolysis spent cathode as anode material for lithium-ion battery

Diffusion coefficient analysis of aluminum electrolysis spent cathode as anode material for lithium-ion battery

Effect of Li Excess on Electrochemical Performance of Ni-Rich LiNi_0.9Co_0.05Mn_0.05O₂ Cathode Materials for Li-Ion Batteries

Effect of Cationic Uniformity in Precursors on Li/Ni Mixing of Ni-Rich Layered Cathodes

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Enhanced performance of a Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode material formed through Taylor flow synthesis and surface modification with Li2MoO4

Cited by 41 publications

References 43 publications

Diffusion coefficient analysis of aluminum electrolysis spent cathode as anode material for lithium-ion battery

Diffusion coefficient analysis of aluminum electrolysis spent cathode as anode material for lithium-ion battery

Effect of Li Excess on Electrochemical Performance of Ni-Rich LiNi0.9Co0.05Mn0.05O2 Cathode Materials for Li-Ion Batteries

Effect of Cationic Uniformity in Precursors on Li/Ni Mixing of Ni-Rich Layered Cathodes

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Effect of Li Excess on Electrochemical Performance of Ni-Rich LiNi_0.9Co_0.05Mn_0.05O₂ Cathode Materials for Li-Ion Batteries