Uniform Coating of Se on Selenophilic Surfaces of Nickel-Rich Layered Oxide Cathode Materials for High Performance Li-Ion Batteries

Ding, Guoyu; Li, Yahui; Gao, Yuan; Wang, Qiulin; Zhu, Zhiyuan; Jing, Xinguo; Yan, Fengqian; Yue, Zhihao; Li, Xiaomin; Sun, Fugen

doi:10.1021/acssuschemeng.0c00011

Cited by 23 publications

(14 citation statements)

References 50 publications

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“…Clearly, NCM811@LNO (0.0068 V) and NCM811@3LNO (0.0032 V) electrodes demonstrate the lower potential difference of anodic-cathodic peaks compared to that of the pristine NCM811 (0.0096 V). The decreased potential difference of NCM811@3LNO electrode implies improved electrode reversibility and reduced electrochemical polarization according to the literature [ 40 , 41 ]. The above results indicate that surface modification with electronic conductor LaNiO 3 crystallites is beneficial to improve the electrode kinetics, leading to increasing the first coulombic efficiency and charge/discharge capacity and decreasing the electrochemical polarization degree of NCM811 cathodes.…”

Section: Resultssupporting

confidence: 60%

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Zhang

et al. 2022

Materials

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Fast charging-discharging is one of the important requirements for next-generation high-energy Li-ion batteries, nevertheless, electrons transport in the active oxide materials is limited. Thus, carbon coating of active materials is a common method to supply the routes for electron transport, but it is difficult to synthesize the oxide-carbon composite for LiNiO2-based materials which need to be calcined in an oxygen-rich atmosphere. In this work, LiNi0.8Co0.1Mn0.1O2 (NCM811) coated with electronic conductor LaNiO3 (LNO) crystallites is demonstrated for the first time as fast charging-discharging and high energy cathodes for Li-ion batteries. The LaNiO3 succeeds in providing an exceptional fast charging-discharging behavior and initial coulombic efficiency in comparison with pristine NCM811. Consequently, the NCM811@3LNO electrode presents a higher capacity at 0.1 C (approximately 246 mAh g−1) and a significantly improved high rate performance (a discharge specific capacity of 130.62 mAh g−1 at 10 C), twice that of pristine NCM811. Additionally, cycling stability is also improved for the composite material. This work provides a new possibility of active oxide cathodes for high energy/power Li-ion batteries by electronic conductor LaNiO3 coating.

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Section: Resultssupporting

confidence: 60%

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Zhang

et al. 2022

Materials

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“…Figure S4A,B exhibits the CV curves of NCM and NCM/S3 at a scanning rate of 0.1 mV s –1 with a voltage range of 2.7–4.5 V. There are three pairs of redox peaks in the CV curves of NCM and NCM/S3, corresponding to various phase transitions from hexagonal (H1) over monoclinic (M) to hexagonal (H2 and H3) phases during the Li + de/intercalation process . The potential intervals (Δ V ) between redox peaks reveal the reversible degree of electrochemical reactions . NCM/S3 shows lower potential intervals (Δ V ) than NCM.…”

Section: Resultsmentioning

confidence: 99%

Sr-Based Sub/Surface Integrated Layer and Bulk Doping to Enhance High-Voltage Cycling of a Ni-Rich Cathode Material

Wang

Chu

Nong

et al. 2022

ACS Sustainable Chem. Eng.

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LiNi0.8Co0.1Mn0.1O2 (NCM) can achieve a high capacity of more than 200 mAh g–1 at charging voltages above 4.5 V, but it suffers from severe capacity fading at a high voltage during cycling associated with the lattice oxygen evolution-induced phase and surface structure modifications. Therefore, the big challenge for improving electrochemical performance is suppressing the lattice oxygen loss at a high voltage. Here, a facile strategy to inhibit the lattice oxygen loss of a Ni-rich material at a high charging voltage by a simple Sr treatment method is reported. The Sr treatment leads to the formation of a Sr-based sub/surface integrated layer and induces the atomic rearrangement on the subsurface to form Sr-based perovskite-like Li x Sr1–x TMO3 (TM = Ni, Co and Mn) during the heat treatment process. The perovskite-like structure can adsorb the oxidized Oα– to oxygen vacancies, transplant the pumped charges from the oxidized Oα–, and reduce them back to O2– to inhibit the movement of oxidized oxygen anions at the charged NCM surface. Furthermore, the formed Sr1–x HPO4 outer layer can prevent NCM from corroding by HF in organic electrolytes. Meanwhile, bulk doping stabilizes the metal–oxygen bond by suppressing the Ni migration at a high charging voltage. The modified NCM thus exhibited a significantly enhanced high-voltage cycle stability with 82.3 and 80.1% of capacity retentions at 1C achieved after 250 cycles at 25 °C and 100 cycles at 60 °C, respectively. This work opened a new avenue to suppress the lattice oxygen loss via surface structure regulations in high-energy-density rechargeable batteries during high-voltage cycling.

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“…Se-coated NCM811 microspherical cathode materials were prepared via a facile melt-diffusion approach by Ding et al [203]. Typically, the selenium powder and the NCM811 microspheres were homogenously mixed and then heated at 280 • C for 10 min under the N 2 atmosphere.…”

Section: Coating Ncmmentioning

confidence: 99%

NCA, NCM811, and the Route to Ni-Richer Lithium-Ion Batteries

Julien

Mauger

2020

Energies

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The aim of this article is to examine the progress achieved in the recent years on two advanced cathode materials for EV Li-ion batteries, namely Ni-rich layered oxides LiNi0.8Co0.15Al0.05O2 (NCA) and LiNi0.8Co0.1Mn0.1O2 (NCM811). Both materials have the common layered (two-dimensional) crystal network isostructural with LiCoO2. The performance of these electrode materials are examined, the mitigation of their drawbacks (i.e., antisite defects, microcracks, surface side reactions) are discussed, together with the prospect on a next generation of Li-ion batteries with Co-free Ni-rich Li-ion batteries.

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Uniform Coating of Se on Selenophilic Surfaces of Nickel-Rich Layered Oxide Cathode Materials for High Performance Li-Ion Batteries

Cited by 23 publications

References 50 publications

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Improving Fast Charging-Discharging Performances of Ni-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Material by Electronic Conductor LaNiO3 Crystallites

Sr-Based Sub/Surface Integrated Layer and Bulk Doping to Enhance High-Voltage Cycling of a Ni-Rich Cathode Material

NCA, NCM811, and the Route to Ni-Richer Lithium-Ion Batteries

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