Facile synthesis of crack-free single-crystalline Al-doped Co-free Ni-rich cathode material for lithium-ion batteries

Liu, Qi; Wu, Zhenqian; Sun, Jingying; Xu, Rong; Li, Xianwei; Yu, Xiaofei; Liu, Yong

doi:10.1016/j.electacta.2022.141473

Cited by 9 publications

(5 citation statements)

References 40 publications

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“…Bulk doping can be generally divided into cation and anion doping. Metal elements, such as Al 3+ [94][95][96][97][98][99][100][101], Gd 3+ [102], Zr 4+ [103][104][105][106][107], Ti 4+ [108][109][110], Ge 4+ [111], Nb 5+ [112][113][114][115][116], Ta 5+ [117][118][119], Mo 6+ [120][121][122][123], W 6+ [124][125][126][127], Mg 2+ [128][129][130][131][132][133][134][135][136], Ca 2+ [137], Sr 2+ [138], Zn 2+ [139], and Na + [140][141][142], are commonly used, as well as non-metallic elements,...…”

Section: Structural Modification By Bulk Phase Dopingmentioning

confidence: 99%

“…The NMA cathode also exhibited a high specific capacity of 232.1 mAh•g −1 even at high voltage at 2.5-4.5 V, and the capacity retention rate after 100 cycles at 0.5 C was maintained at 93.3%, higher than that of NC (66.9%). Liu et al [101] synthesized Al-doped high-nickel cobalt-free single-crystal cathode material LiNi 0.8 Mn 0.16 Al 0.04 O 2 without cracks by the stirring-assisted cation chelation and recombination route. The discharge specific capacity is 204 mAh•g −1 at 0.1 C, and the rate capability is excellent (143 mAh•g −1 at 10 C).…”

Section: Structural Modification By Bulk Phase Dopingmentioning

confidence: 99%

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High-Performance High-Nickel Multi-Element Cathode Materials for Lithium-Ion Batteries

Tian,

Guo,

Bai

et al. 2023

Batteries

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With the rapid increase in demand for high-energy-density lithium-ion batteries in electric vehicles, smart homes, electric-powered tools, intelligent transportation, and other markets, high-nickel multi-element materials are considered to be one of the most promising cathode candidates for large-scale industrial applications due to their advantages of high capacity, low cost, and good cycle performance. In response to the competitive pressure of the low-cost lithium iron phosphate battery, high-nickel multi-element cathode materials need to continuously increase their nickel content and reduce their cobalt content or even be cobalt-free and also need to solve a series of problems, such as crystal structure stability, particle microcracks and breakage, cycle life, thermal stability, and safety. In this regard, the research progress of high-nickel multi-element cathode materials in recent years is reviewed and analyzed, and the progress of performance optimization is summarized from the aspects of precursor orientational growth, bulk phase doping, surface coating, interface modification, crystal morphology optimization, composite structure design, etc. Finally, according to the industrialization demand of high-energy-density lithium-ion batteries and the challenges faced by high-nickel multi-element cathode materials, the performance optimization direction of high-nickel multi-element cathode materials in the future is proposed.

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Section: Structural Modification By Bulk Phase Dopingmentioning

confidence: 99%

Section: Structural Modification By Bulk Phase Dopingmentioning

confidence: 99%

High-Performance High-Nickel Multi-Element Cathode Materials for Lithium-Ion Batteries

Tian,

Guo,

Bai

et al. 2023

Batteries

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show abstract

“…17 Few studies have explored Ni-rich cobalt-free single-crystal NMA. Recently, Liu et al 18 approach shares similarities with the coprecipitation method, where elements with large differences in solubility product are uniformly precipitated through ethylenediaminetetraacetic acid (EDTA)'s chelating effect, the precursors still exhibited partial agglomeration. Additionally, the resulting NMA size postcalcination was at the nanoscale, implying smaller voids between particles, resulting in smaller and more isolated pores.…”

Section: Introductionmentioning

confidence: 99%

“…Few studies have explored Ni-rich cobalt-free single-crystal NMA. Recently, Liu et al employed a novel one-step stirring-assisted cation chelating and recombination route to synthesize single-crystal LiNi 0.8 Mn 0.16 Al 0.04 O 2 via Al-doped nickel-rich Co-free cathode. The material exhibited a specific discharge capacity of 178 mAh g –1 at 1C and a capacity retention rate of 82.2% over 200 cycles.…”

Section: Introductionmentioning

confidence: 99%

PVP-Assisted Hydrothermal Synthesis of Nickel-Rich Cobalt-Free Single-Crystal LiNi_0.9Mn_0.05Al_0.05O₂ for Lithium-Ion Batteries

He,

Liu,

Liu

et al. 2024

ACS Appl. Energy Mater.

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Given cobalt's scarcity and high toxicity, there is a considerable interest in nickel-rich materials with reduced or no cobalt content. However, the majority of such materials are polycrystalline particles, which are susceptible to mechanical breakage and structural deterioration during cycling, resulting in rapid capacity decay. Here, we synthesized dispersed and uniform precursors using a poly(vinylpyrrolidone) (PVP)-assisted hydrothermal approach, followed by calcination to produce nickel-rich, cobalt-free single-crystal LiNi 0.9 Mn 0.05 Al 0.05 O 2 (NMA) cathode materials. The single-crystal morphology effectively reduced intergranular cracking in the cathode material, preserving phase transition reversibility and cycle stability. At a current density of 0.5C, S-NMA exhibited a maximum discharge-specific capacity of 179.2 mAh g −1 with a capacity retention of 93.45% after 100 cycles. Additionally, at 55 °C and a current density of 1C, it reached 213.6 mAh g −1 with a capacity retention of 93.3% after 50 cycles. The single-crystal morphology of the cathode material exhibited an outstanding electrochemical performance. This study offers a novel approach to synthesizing nickel-rich single-crystal precursors for cathodes, which holds considerable promise for the advancement of high-performance cathode materials.

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“…Therefore, it is crucial to emphasize careful control of the quantity of aluminum introduced and the need for further innovation in the doping technique. Many researchers have already contributed to the exploration of aluminum doping control in this regard. − The formation of LiAlO 2 has also been observed during the doping of Al as our earlier research indicates that this process does not only dope aluminum into the lattice but also forms LiAlO 2 on the material surface during the surface coating process employed in Li-rich cathode materials . Despite the extensive investigation of aluminum doping, the exact mechanism by which aluminum enhances the electrochemical (EC) characteristics of materials remains elusive.…”

Section: Introductionmentioning

confidence: 99%

Understanding Electrochemical Performance Enhancement with Quaternary NCMA Cathode Materials

Dong,

Liu,

Leng

et al. 2023

Langmuir

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Ni-rich cathode materials show promise for use in lithium-ion batteries. However, a significant obstacle to their widespread adoption is the structural damage caused by microcracks. This research paper presents the synthesis of Ni-rich cathode materials, including LiNi0.8Co0.1Mn0.1O2 (referred to as NCM) and Li(Ni0.8Co0.1Mn0.1)0.98Al0.02O2 (referred to as NCMA), achieved through the high-temperature solid-phase method. Electrochemical (EC) testing results reveal the impressive EC performance of NCMA. NCMA exhibited a discharge capacity of 141.6 mAh g–1 and maintained a cycle retention rate of up to 74.92% after 300 cycles at a 1 C rate. In contrast, the NCM had a discharge capacity of 109.7 mAh g–1 and a cycle retention rate of 61.22%. Atomic force microscopy showed that the Derjaguin−Muller−Toporov (DMT) modulus value of NCMA exceeded that of NCM, signifying a greater mechanical strength of NCMA. Density functional theory calculations demonstrated that the addition of aluminum during the delithiation process led to the mitigation of anisotropic lattice changes and the stabilization of the NCMA structure. This improvement was attributed to the relatively stronger Al–O bonds compared to the Ni(Co, Mn)–O bonds, which reduced the formation of microcracks by enhancing NCMA’s mechanical strength.

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Facile synthesis of crack-free single-crystalline Al-doped Co-free Ni-rich cathode material for lithium-ion batteries

Cited by 9 publications

References 40 publications

High-Performance High-Nickel Multi-Element Cathode Materials for Lithium-Ion Batteries

High-Performance High-Nickel Multi-Element Cathode Materials for Lithium-Ion Batteries

PVP-Assisted Hydrothermal Synthesis of Nickel-Rich Cobalt-Free Single-Crystal LiNi_0.9Mn_0.05Al_0.05O₂ for Lithium-Ion Batteries

Understanding Electrochemical Performance Enhancement with Quaternary NCMA Cathode Materials

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Facile synthesis of crack-free single-crystalline Al-doped Co-free Ni-rich cathode material for lithium-ion batteries

Cited by 9 publications

References 40 publications

High-Performance High-Nickel Multi-Element Cathode Materials for Lithium-Ion Batteries

High-Performance High-Nickel Multi-Element Cathode Materials for Lithium-Ion Batteries

PVP-Assisted Hydrothermal Synthesis of Nickel-Rich Cobalt-Free Single-Crystal LiNi0.9Mn0.05Al0.05O2 for Lithium-Ion Batteries

Understanding Electrochemical Performance Enhancement with Quaternary NCMA Cathode Materials

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PVP-Assisted Hydrothermal Synthesis of Nickel-Rich Cobalt-Free Single-Crystal LiNi_0.9Mn_0.05Al_0.05O₂ for Lithium-Ion Batteries