Effects of charging rates on LiNi0.6Mn0.2Co0.2O2 (NMC622)/graphite Li-ion cells

Bai, Yaocai; Li, Zhenglong; Liu, Jue; Zhao, Kejie; Du, Zhijia

doi:10.1016/j.jechem.2020.08.008

Cited by 21 publications

(15 citation statements)

References 46 publications

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“…Fast‐charging LIBs require cathodes with fast ion‐transport ability and good electrical conductivity. The current researches mainly focus on cathode structure design and new cathode materials [15] . The structure, morphology, and orientation of active materials affect the polarization of LIBs, thus limiting the diffusion of Li + in the solid phase [16] .…”

Section: Kinetic Factors‐limiting Fast‐chargingmentioning

confidence: 99%

“…The current researches mainly focus on cathode structure design and new cathode materials. [15] The structure, morphology, and orientation of active materials affect the polarization of LIBs, thus limiting the diffusion of Li + in the solid phase. [16] At the electrode scale, active particle size distribution, high active loading, and porosity are associated, so diffusion-based Li + transport is strongly influenced by these parameters.…”

Section: Kinetic Factors-limiting Fast-chargingmentioning

confidence: 99%

See 1 more Smart Citation

Fast‐Charging Strategies for Lithium‐Ion Batteries: Advances and Perspectives

Zhao

Song

2022

ChemPlusChem

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Rapid development of high-energy-density lithium-ion batteries (LIBs) enables the sufficient driving range of electric vehicles (EVs). However, the slow charging speed restricts the popularization of EVs. Commitment to fast-charging research is considered to be the key to advance the EVs strategy. This Review discusses the kinetic factors limiting the fast-charging capability at the material aspects, and summarizes the recent research strategies to achieve fast-charging performance of high-energy-density LIBs through electrode engineering, electrolyte design, and interface optimization. The increasingly important role of computational tools and advanced characterization techniques in fundamentally understanding the failure mechanism of LIBs is emphasized, and the analysis of the thermal runaway problem in the fast-charging process and the corresponding thermal optimization scheme is also involved to give the guidance for the more rational battery design. In view of these factors and strategies, some future perspectives for realizing high-performance fast-charging LIBs are proposed, which are expected to facilitate the large-scale application of fast-charging LIBs in EVs.

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Section: Kinetic Factors‐limiting Fast‐chargingmentioning

confidence: 99%

Section: Kinetic Factors-limiting Fast-chargingmentioning

confidence: 99%

Fast‐Charging Strategies for Lithium‐Ion Batteries: Advances and Perspectives

Zhao

Song

2022

ChemPlusChem

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“…[ 3 ] However, the caveat is that thicker electrodes prevent the cell from fast charging, which can lead to unwanted Li plating and eventual cell failure. [ 4 ] It is generally recognized that the limiting factor of fast charging is the limited transport property of Li + in electrolytes and/or graphite anode. Under fast charging (high C rate) conditions, Li + concentration gradient builds up in both the electrolyte and graphite, leading to insufficient lithiation of graphite and Li plating on graphite electrode.…”

Section: Introductionmentioning

confidence: 99%

Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation

et al. 2021

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Fast charging (<15 min) of lithium‐ion batteries (LIBs) for electrical vehicles (EVs) is widely seen as the key factor that will greatly stimulate the EV markets, and its realization is mainly hindered by the sluggish diffusion of Li+. To have a mechanistic understanding of Li+ diffusion within LIBs, in this study, structural evolutions of electrodes for a Ni‐rich LiNi0.6Mn0.2Co0.2O2 (NMC622) || graphite cylindrical cell with high areal loading (2.78 mAh cm−2) are developed for operando neutron powder diffraction study at different charging rates. Via sequential Rietveld refinements, changes in structures of NMC622 and LixC6 are obtained during moderate and fast charging (from 0.27 C to 4.4 C). NMC622 exhibits the same structural evolution regardless of C‐rates. For phase transitions of LixC6, the stage I (LiC6) phase emerges earlier during the stepwise intercalation at a lower state of charge when charging rate is increased. It is also found that the stage II (LiC12) → stage I (LiC6) transition is the rate‐limiting step during fast charging. The LiC12 → LiC6 transition mechanism is further analyzed using the Johnson–Mehl–Avrami–Kolmogorov model. It is concluded as a diffusion‐controlled, 1D phase transition with decreasing nucleation kinetics under increasing chargingrates.

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“…At present, lithium‐ion batteries (LIBs) and supercapacitors (SCs) are the most commonly used EES devices in social daily life. The energy density of state‐of‐the‐art LIBs is about 150∼300 Wh/kg, with limited power density (less than 2 kW/kg) and short cycle life (∼1000 cycles) [8–12] . By contrast, SCs usually possess high power density (>10 kW/kg) and long life‐span (∼10 5 cycles) but poor energy density (<10 Wh/kg) [13–16] .…”

Section: Introductionmentioning

confidence: 99%

“…The energy density of state-of-the-art LIBs is about 150~300 Wh/kg, with limited power density (less than 2 kW/kg) and short cycle life (~1000 cycles). [8][9][10][11][12] By contrast, SCs usually possess high power density (> 10 kW/kg) and long life-span (~10 5 cycles) but poor energy density (< 10 Wh/ kg). [13][14][15][16] However, driven by the expansion of the markets for electric vehicles, mobile intelligent electronic productions, and auxiliary energy storage (for intermittent photovoltaic or wind power sources), [17] the requirements for advanced EES devices are getting higher and higher.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on Carbon‐Based Materials for High Performance Lithium‐Ion Capacitors

Liu

Zhang

et al. 2021

Batteries & Supercaps

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Lithium‐ion capacitors (LICs) combining of lithium‐ion batteries (LIBs) and supercapacitors (SCs) with improved performance bridge the gap between these two devices, and have attracted huge attention in the field of high‐efficiency electrochemical energy storage. The behavior of electrode materials is essential for the realization of high energy and high output LICs devices. As the most widely utilized electrodes, carbon materials demonstrated their ability in LICs with fast charge storage and long life‐span. Here, an overview of carbon materials for advanced LICs applications is given. The advantages and shortcomings of carbon materials as electrodes are systematically analyzed with the purpose of disclosing their influence on LICs devices. In light of this analysis, the critical aspects are discussed, which should be dealt with in the future for the realization of desires high‐performance LICs devices.

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Effects of charging rates on LiNi0.6Mn0.2Co0.2O2 (NMC622)/graphite Li-ion cells

Cited by 21 publications

References 46 publications

Fast‐Charging Strategies for Lithium‐Ion Batteries: Advances and Perspectives

Fast‐Charging Strategies for Lithium‐Ion Batteries: Advances and Perspectives

Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation

Recent Advances on Carbon‐Based Materials for High Performance Lithium‐Ion Capacitors

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