Electrochemical performance of nano-sized ZnO-coated LiNi0.5Mn1.5O4 spinel as 5 V materials at elevated temperatures

Sun, Yang Kook; Hong, Ki-Joo; Prakash, Jai; Amine, Khalil

doi:10.1016/s1388-2481(02)00277-1

Cited by 257 publications

(58 citation statements)

References 12 publications

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“…In recent years, an increasing attention has been paid to improve the electrochemical performance of spinel LMNO cathode. In this regard, various metal oxides, such as Al 2 O 3 , Bi 2 O 3 , SiO 2 , ZrO 2 , FePO 4 , and so forth, [7][8][9][10][11][12] have been used as surface coating materials to reduce the electrolyte decomposition and HF corrosion, leading to improvement of the electrochemical performances of the spinel LMNO.…”

Section: Introductionmentioning

confidence: 99%

Novel AlF3 surface modified spinel LiMn1.5Ni0.5O4 for lithium-ion batteries: performance characterization and mechanism exploration

Yin

Sun

et al. 2015

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Novel AlF3 surface modified spinel LiMn1.5Ni0.5O4 for lithium-ion batteries: performance characterization and mechanism exploration

Yin

Sun

et al. 2015

Electrochimica Acta

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“…The oxide layers effectively prevent the decomposition of the electrolyte components and the dissolution of transition metal ions while allowing reversible Li ? transport (Baggetto et al 2013;Sun et al 2002a;Verdier et al 2007). Compared to the traditional surface modification methods, such as sol-gel (Sun et al 2002a, b;Verdier et al 2007), and gas-suspension spray coating (Oh et al 2004), atomic layer deposition (ALD) technique provides elegant control over the coating thickness, thus producing ultrathin and conformal morphology (Han et al 2014;Jung et al 2010a;Scott et al 2010;Zhao and Wang 2012).…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical stability of high-voltage LiNi0.5Mn1.5O4 cathode by surface modification using atomic layer deposition

et al. 2014

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We report improved cycling performance of high-voltage LiNi 0.5 Mn 1.5 O 4 cathode for lithiumion batteries by modifying its surface with ultrathin layer coating of Al 2 O 3 (\1 nm) using atomic layer deposition (ALD) technique. Four and six layers of ALD Al 2 O 3 were coated directly on the porous LiNi 0.5 Mn 1.5 O 4 nanoparticle (*200 nm) slurry composite. Electrochemical characterization results show that LiNi 0.5 Mn 1.5 O 4 electrode with four and six layers of ALD Al 2 O 3 maintained 92 and 98 % of their initial capacity after 200 cycles, respectively, in comparison to bare LiNi 0.5 Mn 1.5 O 4 electrode which showed 84 % capacity retention. We show that the ALD Al 2 O 3 coated cathode surface is protected from undesired side reactions occurring at the electrode/electrolyte interface. For the first time, we used XPS studies to investigate the surface chemistry of ultrathin ALD Al 2 O 3 coated LiNi 0.5 Mn 1.5 O 4 and confirmed that the ultrathin ALD Al 2 O 3 layer reduces side reactions involving organic components of the electrolyte decomposition product in high-voltage cathodes.

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“…[3][4][5] The coating of surface protective layers on pristine LMNO particles has been extensively studied in literature. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] These layers provide a shield from the HF, and prevent rapid capacity fade, leading to improved cycling performance and capacity retention. Of the different surface coating techniques, atomic layer deposition (ALD) has inherent advantages that provide conformal, pin-hole free, size-tunable ultrathin films 21 and, thus, provide high capacity retention and a long life cycle.…”

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confidence: 99%

Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials

Patel

Palaparty

Liu

2016

J. Electrochem. Soc.

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LiMn 1.5 Ni 0.5 O 4 (LMNO) has a huge potential for use as a cathode material in electric vehicular applications. However, it could face discharge capacity degradation with cycling at elevated temperatures due to attacks by hydrofluoric acid (HF) from the electrolyte, which could cause cationic dissolution. To overcome this barrier, we coated 3-5 micron sized LMNO particles with a ∼3 nm optimally thick and conductive CeO 2 film prepared by atomic layer deposition (ALD). This provided optimal thickness for mass transfer resistance, species protection, and mitigation of cationic dissolution at elevated temperatures. After 1,000 cycles of chargedischarge between 3.5 V-5 V (vs. Li + /Li) at 55 • C, the optimally coated sample, 50Ce (50 cycles of CeO 2 ALD coated) had a capacity retention of ∼97.4%, when tested at a 1C rate, and a capacity retention of ∼83% at a 2C rate. This was compared to uncoated LMNO particles that had a capacity retention of only ∼82.7% at a 1C rate, and a capacity retention of ∼40.8% at a 2C rate. Lithium ion batteries have emerged as potential candidates for replacement of Ni-Cd batteries in electric vehicles because of their high intrinsic energy densities combined with their ease of portability. This potential creates a need for the development of new or modified cathode and anode materials that possess high energy density, long cycle life, excellent capacity retention, and a large voltage window for operation. For electric vehicles, in particular, the upper voltage cutoff window on the cathode side should be ∼5 V vs. Li + /Li. Lithium manganese nickel oxide LiMn 1.5 Ni 0.5 O 4 (LMNO) has emerged in the research community as a potential cathode material for use in electric vehicles due to its large theoretical capacity of ∼148 mAhg −1 , a high working voltage of ∼4.7 V vs. Li + /Li, and a high energy density. 1,2However, LMNO suffers from high capacity fade during performance at elevated temperatures because Mn dissolves due to generation of hydrofluoric acid (HF) in the electrolyte. 3-5The coating of surface protective layers on pristine LMNO particles has been extensively studied in literature. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] These layers provide a shield from the HF, and prevent rapid capacity fade, leading to improved cycling performance and capacity retention. Of the different surface coating techniques, atomic layer deposition (ALD) has inherent advantages that provide conformal, pin-hole free, size-tunable ultrathin films 21 and, thus, provide high capacity retention and a long life cycle. The ALD process involves a sequence of self-limiting reactions that result in a coating of one monolayer at a time. This enables size tunability at the sub-nanometer level and promotes conformity in the films. Materials like Al 2 O 3 , 17 MgF 2 , 22 TiO 2 , 18 and LiAlO 2 10 have been studied as coating materials prepared by ALD on LMNO. Even though, these materials have provided effective mitigation of cationic dissolution, the ionic conductivity of such protective layers ...

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Electrochemical performance of nano-sized ZnO-coated LiNi0.5Mn1.5O4 spinel as 5 V materials at elevated temperatures

Cited by 257 publications

References 12 publications

Novel AlF3 surface modified spinel LiMn1.5Ni0.5O4 for lithium-ion batteries: performance characterization and mechanism exploration

Novel AlF3 surface modified spinel LiMn1.5Ni0.5O4 for lithium-ion batteries: performance characterization and mechanism exploration

Enhanced electrochemical stability of high-voltage LiNi0.5Mn1.5O4 cathode by surface modification using atomic layer deposition

Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials

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Electrochemical performance of nano-sized ZnO-coated LiNi0.5Mn1.5O4 spinel as 5 V materials at elevated temperatures

Cited by 257 publications

References 12 publications

Novel AlF3 surface modified spinel LiMn1.5Ni0.5O4 for lithium-ion batteries: performance characterization and mechanism exploration

Novel AlF3 surface modified spinel LiMn1.5Ni0.5O4 for lithium-ion batteries: performance characterization and mechanism exploration

Enhanced electrochemical stability of high-voltage LiNi0.5Mn1.5O4 cathode by surface modification using atomic layer deposition

Ultrathin Conductive CeO2Coating for Significant Improvement in Electrochemical Performance of LiMn1.5Ni0.5O4Cathode Materials

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Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials