The high-temperature and high-humidity storage behaviors and electrochemical degradation mechanism of LiNi0.6Co0.2Mn0.2O2 cathode material for lithium ion batteries

Chen, Zhiqiang; Wang, Jing; Huang, Jingxin; Fu, Tao; Sun, Guiyan; Lai, Shouqiang; Zhou, Rong; Li, Kun; Zhao, Jinbao

doi:10.1016/j.jpowsour.2017.07.087

Cited by 144 publications

(143 citation statements)

References 31 publications

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“…• C and 80% relative humidity conducted by Chen et al 16 showed LiOH Raman bands, contrary to our observations (Figure 3). Additionally, these authors reported a weight increase of NMC622 at their conditions after six weeks of about 5%, roughly an order of magnitude higher than what we observed.…”

Section: Discussioncontrasting

confidence: 99%

“…The most common impurities which can be formed by storage at ambient air are hydroxides via the reaction of the NMC surface with humidity as well as carbonates via the reaction of CO 2 with the initially formed surface hydroxides. It is known that the formation of surface impurities is more significant on Ni-rich NMC materials, [16][17][18][19]21,22 which would be consistent with the observed unchanged voltage profile and capacity after one year of ambient storage for NMC111 (see text below) in contrast to NMC811. The formation of hydroxide/carbonate surface impurities on Ni-rich surfaces could also explain the observed initial voltage peak feature, as these would likely form an insulating and therefore resistive layer covering the active material particles.…”

Section: Resultssupporting

confidence: 72%

“…In the first cycle of the NMC811 samples ( Figure 1a), an initial voltage peak appears at the very beginning of the charging process, similar to the observations in the literature for LiNiO 2 , 22 NMC532, 21 and NMC622. 16 Its magnitude, i.e., the maximum initial peak voltage increases the longer the electrode was exposed to ambient air and reaches 3.80 V and 4.22 V for the 3-months old and for the 1-year old samples, respectively. In comparison, for the fresh sample no initial voltage peak is observed and delithiation of the NMC811 not exposed to the ambient starts at ∼3.64 V. After the fresh and 3-months old samples are charged to ∼80 mAh/g NMC , their voltage profiles merge and no significant differences between the two coatings can be detected anymore.…”

Section: Resultsmentioning

confidence: 98%

“…15,19 Upon storage at elevated temperature and/or high humidity, increasing carbonate contents have been reported for the Nirich compounds LiNi 0.81 Co 0. 16 • C, 80% relative humidity and one month of storage. 18 In most of the previously mentioned studies, the formed carbonate species are assumed to be Li 2 CO 3 , 12,13,15,[17][18][19][20]22 although clear evidence for Li 2 CO 3 is not presented.…”

mentioning

confidence: 99%

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Effect of Ambient Storage on the Degradation of Ni-Rich Positive Electrode Materials (NMC811) for Li-Ion Batteries

Jung

Morasch

Karayaylalı

et al. 2018

J. Electrochem. Soc.

354

415

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is one of the high-energy positive electrode (cathode) materials for next generation Li-ion batteries. However, compared to the structurally similar LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC111), it can suffer from a shorter lifetime due to its higher surface reactivity. This work studied and compared the formation of surface contaminations on NMC811 and NMC111 when stored under ambient conditions using electrochemical cycling, Raman spectroscopy, and X-ray photoelectron spectroscopy. NMC811 was found to develop a surface layer of up to ∼10 nm thickness that was mostly composed of nickel carbonate species mixed with minor quantities of hydroxide and water after ambient storage for 1 year, while no significant changes were observed on the NMC111 surface. The amount of carbonate species was quantified by gas chromatographic (GC) detection of carbon dioxide generated when the NMC particles were dispersed in hydrochloric acid. Surface impurity species formed on NMC811 upon ambient storage not only lead to a significant delithiation voltage peak in the first charge, but also markedly reduce the cycling stability of NMC811-graphite cells due to significantly growing polarization of the NMC811 electrode.

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Section: Discussioncontrasting

confidence: 99%

Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 98%

mentioning

confidence: 99%

See 2 more Smart Citations

Effect of Ambient Storage on the Degradation of Ni-Rich Positive Electrode Materials (NMC811) for Li-Ion Batteries

Jung

Morasch

Karayaylalı

et al. 2018

J. Electrochem. Soc.

354

415

View full text Add to dashboard Cite

show abstract

“…Here, the circumstances in which Li 2 CO 3 (Eq. 1) or NiCO 3 is favored remain unclear [35,72,73]. Researchers also reported that high humidity can lead to more hydroxide (e.g., LiOH) on NMC622 [72] and that surface impurities can affect cell impedances in subsequent cycles through reactions with electrolytes to form a Li + diffusion inhibiting layer.…”

Section: Impurities and Parasitic Reactionsmentioning

confidence: 99%

Degradation Mechanisms and Mitigation Strategies of Nickel-Rich NMC-Based Lithium-Ion Batteries

Yuan

Zhang

et al. 2019

Electrochem. Energ. Rev.

525

383

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The demand for lithium-ion batteries (LIBs) with high mass-specific capacities, high rate capabilities and long-term cyclabilities is driving the research and development of LIBs with nickel-rich NMC (LiNi x Mn y Co 1−x−y O 2 , x ⩾ 0.5 ) cathodes and graphite (Li x C 6 ) anodes. Based on this, this review will summarize recently reported and widely recognized studies of the degradation mechanisms of Ni-rich NMC cathodes and graphite anodes. And with a broad collection of proposed mechanisms on both atomic and micrometer scales, this review can supplement previous degradation studies of Ni-rich NMC batteries. In addition, this review will categorize advanced mitigation strategies for both electrodes based on different modifications in which Ni-rich NMC cathode improvement strategies involve dopants, gradient layers, surface coatings, carbon matrixes and advanced synthesis methods, whereas graphite anode improvement strategies involve surface coatings, charge/discharge protocols and electrolyte volume estimations. Electrolyte components that can facilitate the stabilization of anodic solid electrolyte interfaces are also reviewed, and trade-offs between modification techniques as well as controversies are discussed for a deeper understanding of the mitigation strategies of Ni-rich NMC/graphite LIBs. Furthermore, this review will present various physical and electrochemical diagnostic tools that are vital in the elucidation of degradation mechanisms during operation to supplement future degradation studies. Finally, this review will summarize current research focuses and propose future research directions.

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Challenges and Strategies to Advance High‐Energy Nickel‐Rich Layered Lithium Transition Metal Oxide Cathodes for Harsh Operation

Liu

Daali

et al. 2020

Adv Funct Materials

202

134

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Nickel-rich layered lithium transition metal oxides (LiNi 1−x−y Co x Mn y O 2 and LiNi 1−x−y Co x Al y O 2 , x + y ≤ 0.2) are the most attractive cathode materials for the next generation lithium-ion batteries for automotive application. However, they suffer from structural/interfacial instability during repeated charge/discharge, resulting in severe performance degradation and serious safety concerns. This work provides a comprehensive review about challenges and strategies to advance nickel-rich layered cathodes specifically for harsh (high-voltage, hightemperature, and fast charging) operations. Firstly, the degradation pathways of nickel-rich cathodes including surface/interface degradation, undesired cathode-electrolytes parasitic reactions, gas evolution, inter/intragranular cracking, and electrical/ionic isolation are discussed. Then, recent achievements in stabilizing the structure/interface of nickel-rich cathodes via surface coating, cation/anion doping, composition tailoring, morphology engineering, and electrolytes optimization are summarized. Moreover, challenges and strategies to improve the performance of Ni-rich cathodes at the electrode level are discussed. Outlook and perspectives to promote the practical application of nickel-rich layered cathodes toward automotive application are provided as well.

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The high-temperature and high-humidity storage behaviors and electrochemical degradation mechanism of LiNi0.6Co0.2Mn0.2O2 cathode material for lithium ion batteries

Cited by 144 publications

References 31 publications

Effect of Ambient Storage on the Degradation of Ni-Rich Positive Electrode Materials (NMC811) for Li-Ion Batteries

Effect of Ambient Storage on the Degradation of Ni-Rich Positive Electrode Materials (NMC811) for Li-Ion Batteries

Degradation Mechanisms and Mitigation Strategies of Nickel-Rich NMC-Based Lithium-Ion Batteries

Challenges and Strategies to Advance High‐Energy Nickel‐Rich Layered Lithium Transition Metal Oxide Cathodes for Harsh Operation

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