Enhancing the electrochemical properties of LiNi0.92Co0.05Mn0.03O2 cathode material via co-doping aluminium and fluorine for high-energy lithium-ion batteries

Peng, Zhongdong; Yan, Qiuming; Du, Ke; Hu, Guorong; Luo, Zhongyuan; Fang, Zijun; Li, Zhiying; Wang, Xin; Jiang, Qinglai; Qi, Xianyue

doi:10.1007/s11581-023-05015-w

Cited by 8 publications

(3 citation statements)

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“…The calculation process and the various parameters involved can be found in our previous research results. 51 = 4 Li…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ni-Rich Co-less Cathode Materials with LiYO₂ and Y³⁺ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Luo,

Hu,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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Despite many advantages of Ni-rich Co-less cathode materials (Ni ≥ 90%), further applications of such materials are limited by the extreme sensitivity to the air environment. Herein, cathode material with the optimal amount of yttrium modification is selected for comparison with the bare NCM. The differences of various physicochemical indexes between the two materials before and after exposure to air environment treatment are evaluated comprehensively by various characterization methods, such as XPS, SEM, EDS, XRD, HRTEM, EIS, etc. Impressively, the formation of undesirable residual lithium compounds was significantly suppressed due to the effective protection of the LiYO 2 -coated nanolayer and the doping of Y 3+ , which prolonged the lifetime of environmental storage. In addition, the Y2-NCM cathode maintained good cycling stability and low impedance after 4 weeks of exposure to ambient air. This work provides a method to reduce the air sensitivity of Ni-rich, Co-less cathode materials.

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“…The calculation process and the various parameters involved can be found in our previous research results. 51 = 4 Li…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…It can be calculated by the following two equations. The calculation process and the various parameters involved can be found in our previous research results …”

Section: Resultsmentioning

confidence: 99%

Ni-Rich Co-less Cathode Materials with LiYO₂ and Y³⁺ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Luo,

Hu,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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“…9−14 Among them, cation doping with multiple elements is considered a simple and effective approach to enhancing the stability of particle structure. 15,16 Liu et al adopt a Mg/W co-doping strategy for LiNi 0.9 Al 0.1 O 2 cathodes to improve the durability of cycling through crystal structure modification and the creation of a microstructure aligned radially from the center. 17 doped LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode material through the sol− gel method, achieving improved structural stability and reduced particle agglomeration.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Impact of Dual Site Modification on the Phase Transformation and Ion Transport Mechanism of Ni-Rich Cathode Materials

Zhang,

Cao,

Lin

et al. 2024

ACS Appl. Mater. Interfaces

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Ni-rich cathode materials have garnered significant attention attributable to the high reversible capacity and superior rate performance, particularly in the electric vehicle industry. However, the structural degradation experienced during cycling results in rapid capacity decay and deterioration of the rate performance, thereby impeding the widespread application of Ni-rich cathodes. Herein, a Mg/Ti co-doping strategy was developed to boost the structure stability and Li-ion transport kinetics of the Ni-rich cathode material LiNi 0.90 Co 0.05 Mn 0.05 O 2 (NCM9055) under long cycle. It is demonstrated that the Mg 2+ ions inserted into the lithium layer could serve as pillars, enhancing the stability of the delithiated layer structure. The introduction of robust Ti−O bonding mitigated the detrimental H2−H3 phase transition (∼4.2 V) during cycling. In addition, despite the fact that Mg/Ti co-doping slightly reduces Li + diffusion coefficient in the modified cathode material (NCM9055-MT), it effectively stabilized the robustness of the layered structure and maintained the Li + diffusion channel while charging and discharging, thereby improving the Li + diffusion coefficient after a long cycle. Therefore, the Mg/Ti co-doped cathode materials exhibited an exceptional capacity retention rate of 99.9% (100 cycles, 1 C). Additionally, the Li + diffusion coefficient of the co-doped NCM9055-MT (2.924 × 10 −10 cm 2 s −1 ) after 100 cycles was effectively enhanced compared with the case of undoped NCM9055 (4.806 × 10 −11 cm 2 s −1 ). This work demonstrates that the Mg/Ti co-doping approach effectively enhanced the stability of layered Ni-rich cathode materials.

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Direct Recycling of Li_xNi_0.5Mn_0.3Co_0.2O₂ from Production Scrap and End‐Of‐Life Batteries, Using Solid‐State Relithiation

Sita,

Sommerville,

Alsofi

et al. 2024

Batteries & Supercaps

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Direct recycling of Li‐ion battery cathodes offers a sustainable and potentially cost‐effective alternative to conventional methods, often involving complex chemical processes and significant material losses. This study focuses on the relithiation of cathode materials from quality control reject (QCR) and end‐of‐life (EoL) Li‐ion cells to restore their physical structure, morphology, and electrochemical performance. Two NMC532/graphite pouch cells from the same manufacturer were studied. QCR cells, stored under ambient conditions, experienced corrosion and degradation before recycling, while EoL cells were cycled to the end of life. The cells were disassembled, and the cathode materials were delaminated using NaOH solution, then relithiated with LiOH at 700°C for 15 hours in the air. Extensive characterization analyzed elemental composition, structural properties, thermal stability, and particle size distribution. Results indicated that relithiation successfully restored lithium content and improved the structural ordering and morphology of the cathode materials. The electrochemical performance of the relithiated cathodes exhibited good stability over 100 charge‐discharge cycles. The relithiated QCR samples achieved a capacity of 155.57 mAh g⁻¹, while EoL samples reached 152.53 mAh g⁻¹, comparable to pristine materials. This study highlights relithiation's potential to extend the lifecycle of Li‐ion cathodes, contributing to a more sustainable circular economy for battery materials.

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Enhancing the electrochemical properties of LiNi0.92Co0.05Mn0.03O2 cathode material via co-doping aluminium and fluorine for high-energy lithium-ion batteries

Cited by 8 publications

References 50 publications

Ni-Rich Co-less Cathode Materials with LiYO₂ and Y³⁺ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Ni-Rich Co-less Cathode Materials with LiYO₂ and Y³⁺ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Revealing the Impact of Dual Site Modification on the Phase Transformation and Ion Transport Mechanism of Ni-Rich Cathode Materials

Direct Recycling of Li_xNi_0.5Mn_0.3Co_0.2O₂ from Production Scrap and End‐Of‐Life Batteries, Using Solid‐State Relithiation

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Enhancing the electrochemical properties of LiNi0.92Co0.05Mn0.03O2 cathode material via co-doping aluminium and fluorine for high-energy lithium-ion batteries

Cited by 8 publications

References 50 publications

Ni-Rich Co-less Cathode Materials with LiYO2 and Y3+ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Ni-Rich Co-less Cathode Materials with LiYO2 and Y3+ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Revealing the Impact of Dual Site Modification on the Phase Transformation and Ion Transport Mechanism of Ni-Rich Cathode Materials

Direct Recycling of LixNi0.5Mn0.3Co0.2O2 from Production Scrap and End‐Of‐Life Batteries, Using Solid‐State Relithiation

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Ni-Rich Co-less Cathode Materials with LiYO₂ and Y³⁺ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Ni-Rich Co-less Cathode Materials with LiYO₂ and Y³⁺ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

Direct Recycling of Li_xNi_0.5Mn_0.3Co_0.2O₂ from Production Scrap and End‐Of‐Life Batteries, Using Solid‐State Relithiation