Al2O3 Coated Concentration-Gradient Li[Ni0.73Co0.12Mn0.15]O2 Cathode Material by Freeze Drying for Long-Life Lithium Ion Batteries

Wang, Jingpeng; Du, Chunyu; Yan, Chunqiu; He, Xiao; Song, Bai; Yin, Geping; Cheng, Xinqun

doi:10.1016/j.electacta.2015.06.112

Cited by 63 publications

(29 citation statements)

References 34 publications

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“…Moreover, researchers have combined gradient layers (the core) with Mn-rich surface coatings on NMC532 and reported that the valences of Ni and Co can be kept at lower states than regular NMC532 particles. Similarly, NMC811 with an exterior concentration gradient layer was uniformly coated with Al 2 O 3 through freeze-drying and displayed better capacity retention as compared with untreated samples [212]. Furthermore, LiPON as a conductive material used to coat anodes can also reportedly be applied to NMC811 with a surface gradient layer to maintain rate capability and improve capacity retention [213].…”

Section: Synergy Of Multiple Mitigation Methodsmentioning

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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Section: Synergy Of Multiple Mitigation Methodsmentioning

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

View full text Add to dashboard Cite

show abstract

“…The materials selected for coating are mainly some substances with relatively stable chemical properties, such as oxides, fluorides, salts and polymers. As previously reported, AlF 3 , Al 2 O 3 , TiO 2 , ZnO, Li 4 SiO 4 , LiAlO 2 , and SnO 2 (Yang et al, 2012;Lee et al, 2013;Wang et al, 2015;Dai et al, 2016;Lai et al, 2016;He et al, 2017;Srur-Lavi et al, 2017;Liua et al, 2018;Zheng et al, 2018;Xie et al, 2019) were used as effective coating materials for lithium battery cathode materials. The coated materials contribute to more stable SEI film, which can slow down the decomposition of electrolyte and protect bulk materials from corrosion during charging and discharging.…”

Section: Introductionmentioning

confidence: 61%

Synthesis and Characterization of Nano SnO2 Modification on LiNi0.8Mn0.1Ni0.1O2 Cathode Materials for Lithium Ion Batteries

Wang

Peng

et al. 2019

Front. Energy Res.

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The precursor material of Ni 0. 8Co 0.1 Mn 0.1 (OH) 2 was prepared by a co-precipitation method to obtain the layered cathode materials LiNi 0.8 Co 0.1 Mn 0.1 O 2 (811) through roasting with LiOH•H 2 O. Then the SnO 2-modified samples were obtained by adding tin oxide into the ball mill. It was found by XRD characterization of the original and modified samples, that the addition of SnO 2 did not change the layered structure of the raw materials. Microstructure and distribution of the SnO 2 were analyzed with SEM and EDS. Charge/discharge tests indicated that the SnO 2-modified phases improved the cycling stability and rate capability. The results of CV test showed that the polarization of SnO 2 modified electrode was smaller. AC impedance showed that SnO 2 /LiNi 0.8 Co 0.1 Mn 0.1 O 2 electrode had smaller R ct and R f value. The above test results indicate that the modification of SnO 2 improves the electrochemical performance of cathode material LiNi 0.8 Co 0.1 Mn 0.1 O 2 .

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“…In particular, surface modification through the Atomic Layer Deposition (ALD) method, where atomically thin layers of metal oxides can be controlled when deposited, [ 25 ] has shown significant improvement both in capacity and in life cycle. Stable metal oxides, such as ZnO, ZrO 2 , SiO 2 , TiO 2 , AlPO 4 , Al 2 O 3 , and CeO 2 notably improved battery performance [ 26–46 ] and, as a result, it is believed that ALD coating strategies may preserve and stabilize cathode particles. Although the impact of coating on metal dissolution has not been specifically studied, it is generally believed that it protects particles from dissolution.…”

Section: Introductionmentioning

confidence: 99%

Discovery of an Unexpected Metal Dissolution of Thin‐Coated Cathode Particles and Its Theoretical Explanation

Pham

Gao

et al. 2020

Advcd Theory and Sims

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The degree of metal dissolution of cathode materials is a critical parameter in determining the performance of lithium-ion batteries (LIBs). Ultra-thin coated cathode particles, fabricated via atomic layer deposition (ALD), exhibit superior battery performance over that of bare particles. Therefore, it is generally believed that a coating layer protects the particles from metal dissolution of active materials, which is a critical cathode degradation mechanism. However, it is observed that ultra-thin CeO 2 coating intensified the Mn dissolution of LiMn 2 O 4 (LMO) during cycling of LIBs, whereas ultra-thin Al 2 O 3 coating tended to inhibit Mn dissolution. A detailed density functional theory (DFT) study is carried out to explain these experimental observations by analyzing interaction of Mn atoms with neighboring electrode atoms in terms of energetic and structural aspect. All atomic and electronic analyses are consistent with the experimental observations. Several common materials are investigated as possible ALD coatings for LIBs to provide general insight, and it is found that Mn dissolution can be suppressed or accelerated depending on the material selection. This is the first report finding that depending on the coating material, metal dissolution can be accelerated, providing new insights into the impact of ALD coating materials on metal dissolution in cathode materials. potential, superior capacity, a long life cycle, and a sufficiently broad range of working temperatures. Although metal oxide cathodes satisfy the criteria, they suffer from an inevitable metal dissolution degradation process. In the dissolution degradation process, transition metal ions dissolve from cathode active materials and can deposit onto the anode, causing severe cell aging and irreversible side reactions that reduce performance. [1,2] For high performance cathode materials such as LiNi x Mn y Co z O 2 (NMC, x + y + z = 1), LiNi 0.5 Mn 1.5 O 4 (LNMO), and LiMn 2 O 4 (LMO), metal dissolution (Ni, Co, Mn, etc.) is severe, and, furthermore, it was found that in such cathode materials, which are composed of two or more transition metals, there is no preferential dissolution among the constituent metals. [3] To study the metal dissolution phenomena, manganese is an excellent candidate for intensive study of the fundamental interfacial processes and side reactions at cathode surfaces because of its low toxicity, low cost, and the high natural abundance of Mn, [4][5][6][7][8][9][10][11][12] which allows it to be used in several promising cathode materials, such as NMC, LNMO, and LMO. It has been published that Mn dissolution accounts for 23% and 34% of overall capacity degradation at room temperature and at 55°C [13] in LMO, respectively. The major reason for LMO degradation, [14][15][16][17][18] as well as for other metal oxide cathode materials, [3,[19][20][21] has been identified as structural changes in the material due to phase transformations, alternation of intrinsic properties (such as electronic and ionic conductivity), dissoluti...

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Al2O3 Coated Concentration-Gradient Li[Ni0.73Co0.12Mn0.15]O2 Cathode Material by Freeze Drying for Long-Life Lithium Ion Batteries

Cited by 63 publications

References 34 publications

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

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

Synthesis and Characterization of Nano SnO2 Modification on LiNi0.8Mn0.1Ni0.1O2 Cathode Materials for Lithium Ion Batteries

Discovery of an Unexpected Metal Dissolution of Thin‐Coated Cathode Particles and Its Theoretical Explanation

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