Enhancing the structural stability and capacity retention of Ni-rich LiNi0.7Co0.3O2 cathode materials via Ti doping for rechargeable Li-ion batteries: Experimental and computational approaches

Kasim, Muhd Firdaus; Azizan, Wan Aida Hazwani Wan; Elong, Kelimah; Kamarudin, Norashikin; Yaakob, Muhamad Kamil; Badar, Nurhanna

doi:10.1016/j.jallcom.2021.161559

Cited by 24 publications

(7 citation statements)

References 34 publications

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“…It can be found that the particle size of the primary decreases significantly with manganese content. The narrow primary particle size facilitates the release of mechanical stresses generated during charge and discharge, hinders the generation of microcracks, and thus improves the cyclic stability of the anode material . From the energy-dispersive spectrometry (EDS) mapping of Ni, Co, Mn, and Al for (a) NCMA9352, (b) NVMA9532, and (c) NCMA9712 as shown in Figure S3, we observed that Ni, Co, and Mn were evenly distributed on the surface of the sample, and the proportion of elements was consistent with the results of EDS mapping.…”

Section: Resultssupporting

confidence: 77%

Insight into the Role of Co and Mn Elements in Ni-Rich LiNi_0.9Co_xMn_0.08–xAl_0.02O₂ Cathode Materials

Zeng,

Guo,

Song

et al. 2023

Ind. Eng. Chem. Res.

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Ni x Co y Mn z Al 1−x−y−z O 2 (NCMA, 1 − x − y − z ≥ 0.9) is one of the most promising cathode materials for lithium-ion batteries due to its high energy density and low cost. However, the roles of Co and Mn contents in NCMAs remain to be investigated. Herein, LiNi 0.9 Co x Mn 0.08−x Al 0.02 O 2 (x = 0.07, 0.05, 0.03) are synthesized by a hydroxide coprecipitation method and high-temperature solidphase method. The results show that Co can increase the value of the c-axis, decrease the content of Ni 2+ on the surface, and inhibit lattice expansion along the c-axis in the voltage range of 2.7−4.3 V. However, Mn has a superiority in reducing the primary particle size and preventing the sharp collapse of the lattice along the c-axis in the deep delithiated state, corresponding to a voltage range of 4.3− 4.5 V. These new insights are intended to guide further research on NCMAs.

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Section: Resultssupporting

confidence: 77%

Insight into the Role of Co and Mn Elements in Ni-Rich LiNi_0.9Co_xMn_0.08–xAl_0.02O₂ Cathode Materials

Zeng,

Guo,

Song

et al. 2023

Ind. Eng. Chem. Res.

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“…By having good structural integrity, it is believed that this material will have excellent electrochemical performance. Refinements results prove that increasing annealing temperature can help promote the formation of a well-defined layered structure that allows Li+ ions to move randomly between the layered cathode materials, subsequently improving the cathode's electrochemical performance materials [35].…”

Section: Phase and Structural Studiesmentioning

confidence: 94%

Annealing effect on structural and electrochemical performance of Ti-doped LiNi1/3Mn1/3Co1/3O2 cathode materials

Elong

Kasim

Badar

et al. 2023

J. Electrochem. Sci. Eng.

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NMC 111 cathode materials exhibit engaging properties in high energy density and low cost, making it great potential for the next generation of high-energy lithium-ion batteries. However, it still faces challenges such as fast capacity fade, especially at high C rates. Herein, we implement the novel Ti-doped cathode material, LiNi0.3Mn0.3Co0.3Ti0.1O2 (NMCT) synthesized via the combustion method. It was discovered that NMCT can effectively improve capacity delivery at high C rates. The T80 material demonstrated superior electrochemical annealed at 800 ˚C for 72 h, with an exceptional specific discharge capacity of 148.6 mAh g-1 and excellent cycle stability (capacity retention 96.8 %) after 30th cycles at 3 C. The results demonstrated that Ti-doped NMC had superior advantages for LiNi1/3Mn1/3Co1/3O2 (NMC 111) material at the optimum temperature of 800 °C for 72 h. It is one of the potential cathode materials for Li-ion batteries.

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“…Moreover, NiO, which has a rocksalt-like structure, appears as a competing phase, and the rocksalt phase has also been observed in highly delithiated layered oxides. 14,15,22,52 In addition, when most of the Li atoms were extracted, the disordered spinel-type Ni 3 O 4 phase exists, which can also be transformed to the rocksalt phase, leading to the formation of cracks at the surface. 9,14,15,22,53 Regarding oxygen stability, which is an important issue discussed in detail in the previous session for layered oxides, we observed the presence of O 2 as a competing phase at high SoCs, which is evidence for oxygen removal.…”

Section: ■ Computational Methodsmentioning

confidence: 99%

Insights into the Structural and Thermodynamic Instability of Ni-Rich NMC Cathode

Tran

Lin

2023

ACS Sustainable Chem. Eng.

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The Ni-rich LiNi 1-x-y Mn x Co y O 2 (NMC) layered oxides have been promising materials to replace the LiCoO 2 commercial cathode due to their high operation voltages, low cost, and enhanced capacity. However, structural instability is the main drawback of the Ni-rich NMC system, leading to capacity fading, which prevents its commerce application. While numerous efforts have been made to comprehend and overcome this issue, there remains a lack of systematic phase stability analysis which is an essential factor to be addressed. Herein, systematic firstprinciples calculations were performed in this study to reveal the structural, oxidation, and phase stability of Ni-rich NMC during delithiation. This is the first report on competing phases of Ni-rich NMC at various states of charge (SoCs). The compounds with the spinel and rock salt structures formed during delithiation and oxygen evolution takes place at highly delithiation cases, which are likely the origins of capacity fading and crack formation at the surface. This work also outlined the thermodynamic foundation of doping and oxidation state gradient-based core−shell strategies for resolving the instability and enhancing the capacity retention of Ni-rich NMC layered oxides as cathode materials in Li-ion batteries.

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Enhancing the structural stability and capacity retention of Ni-rich LiNi0.7Co0.3O2 cathode materials via Ti doping for rechargeable Li-ion batteries: Experimental and computational approaches

Cited by 24 publications

References 34 publications

Insight into the Role of Co and Mn Elements in Ni-Rich LiNi_0.9Co_xMn_0.08–xAl_0.02O₂ Cathode Materials

Insight into the Role of Co and Mn Elements in Ni-Rich LiNi_0.9Co_xMn_0.08–xAl_0.02O₂ Cathode Materials

Annealing effect on structural and electrochemical performance of Ti-doped LiNi1/3Mn1/3Co1/3O2 cathode materials

Insights into the Structural and Thermodynamic Instability of Ni-Rich NMC Cathode

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Enhancing the structural stability and capacity retention of Ni-rich LiNi0.7Co0.3O2 cathode materials via Ti doping for rechargeable Li-ion batteries: Experimental and computational approaches

Cited by 24 publications

References 34 publications

Insight into the Role of Co and Mn Elements in Ni-Rich LiNi0.9CoxMn0.08–xAl0.02O2 Cathode Materials

Insight into the Role of Co and Mn Elements in Ni-Rich LiNi0.9CoxMn0.08–xAl0.02O2 Cathode Materials

Annealing effect on structural and electrochemical performance of Ti-doped LiNi1/3Mn1/3Co1/3O2 cathode materials

Insights into the Structural and Thermodynamic Instability of Ni-Rich NMC Cathode

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Insight into the Role of Co and Mn Elements in Ni-Rich LiNi_0.9Co_xMn_0.08–xAl_0.02O₂ Cathode Materials

Insight into the Role of Co and Mn Elements in Ni-Rich LiNi_0.9Co_xMn_0.08–xAl_0.02O₂ Cathode Materials