The role of Cu impurity on the structure and electrochemical performance of Ni-rich cathode material for lithium-ion batteries

Wu, Tonghao; Wang, Guange; Liu, Borui; Huang, Qing; Su, Yuefeng; Wu, Feng; Kelly, Ryan M.

doi:10.1016/j.jpowsour.2021.229774

Cited by 29 publications

(13 citation statements)

References 40 publications

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“…The lack of prominence in the XPS spectra of Cu 2p may be due to the low Cu content in the material. 43 The Fe 2p spectra (Figure 2d) for SCNFCu showed Fe 2p 3/2 and Fe 2p 1/2 peaks located at ∼710.78 and ∼724.73 eV, with two satellite peaks at ∼713.08 and ∼732.98 eV, respectively, confirms the presence of the Fe 3+ state. 38 Explicitly, Fe/Cu addition shows a negligible chemical shift of binding energy and does not change the overall Ni ion environment in the Ni-rich layered cathode.…”

Section: Morphology Elemental Distribution and Structural Featuresmentioning

confidence: 69%

“…The Cu 2p spectra (Figure d) for SCNFCu exhibited Cu 2p 3/2 and Cu 2p 1/2 peaks apparently detected at ∼933.63 and ∼953.43 eV with two satellite peaks at ∼941.83 and ∼961.83 eV, respectively. The lack of prominence in the XPS spectra of Cu 2p may be due to the low Cu content in the material . The Fe 2p spectra (Figure d) for SCNFCu showed Fe 2p 3/2 and Fe 2p 1/2 peaks located at ∼710.78 and ∼724.73 eV, with two satellite peaks at ∼713.08 and ∼732.98 eV, respectively, confirms the presence of the Fe 3+ state .…”

Section: Resultsmentioning

confidence: 92%

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Manganese and Cobalt-Free Ultrahigh-Ni-Rich Single-Crystal Cathode for High-Performance Lithium Batteries

Saleem

Zhu

Majeed

et al. 2023

ACS Appl. Mater. Interfaces

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Current commercial nickel (Ni)-rich Mn, Co, and Al-containing cathodes are employed in high-energy-density lithium (Li) batteries all around the globe. The presence of Mn/Co in them brings out several problems, such as high toxicity, high cost, severe transition-metal dissolution, and quick surface degradation. Herein, a Mn/Co-free ultrahigh-Ni-rich single-crystal Li-Ni 0.94 Fe 0.05 Cu 0.01 O 2 (SCNFCu) cathode with acceptable electrochemical performance is benchmarked against a Mn/Co-containing cathode. Despite having a slightly lower discharge capacity, the SCNFCu cathode retaining 77% of its capacity across 600 deep cycles in full-cell outperforms comparable to a high-Ni single-crystal LiNi 0.9 Mn 0.05 Co 0.05 O 2 (SCNMC; 66%) cathode. It is shown that the stabilizing ions Fe/Cu in the SCNFCu cathode reduce structural disintegration, undesirable side reactions with the electrolyte, transition-metal dissolution, and active Li loss. This discovery provides a new extent for cathode material development for nextgeneration high-energy, Mn/Co-free Li batteries due to the compositional tuning flexibility and quick scalability of SCNFCu, which is comparable to the SCNMC cathode.

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Section: Morphology Elemental Distribution and Structural Featuresmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 92%

Manganese and Cobalt-Free Ultrahigh-Ni-Rich Single-Crystal Cathode for High-Performance Lithium Batteries

Saleem

Zhu

Majeed

et al. 2023

ACS Appl. Mater. Interfaces

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“…It is reported that Cu 2+ effectively enters the main part of the NCM materials and occupies Mn 4+ at low levels. 29 In the case of Co 2p, a pair of binding energies exists at 780.1 and 795.4 eV, which is not significantly different between Cu-0 and Cu-1 (Figure S2b of the Supporting Information). The Ni 2p spectra are exhibited in Figure 2c, and Ni 2p 3/2 and Ni 2p 1/2 correspond to the two major peaks with binding energies at 855.0 and 872.3 eV, respectively.…”

Section: Resultsmentioning

confidence: 92%

Dual-Site Doping of Cu²⁺ Enables High Voltage Stability and Rate Performance of Single-Crystal LiNi_0.5Co_0.2Mn_0.3O₂ for Li-Ion Batteries

et al. 2023

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LiNi x Co y Mn 1−x−y O 2 (NCM) undergoes severe lattice distortion and capacity decay during charging and discharging at high voltages, affecting its cycle life. Here, dual-site doping of Cu 2+ singlecrystal LiNi 0.5 Co 0.2 Mn 0.3 O 2 (SC-NCM523) was prepared by a moltensalt-assisted method. Cu 2+ is doped into the manganese (Mn) and lithium (Li) sites, which inhibits the occurrence of cation mixing while acting as a pillar to broaden and stabilize the channels for Li + transport, and it enables high voltage stability and rate performance of the material simultaneously. The sample has a discharge capacity of 190.6 mAh g −1 in the first cycle at 0.1 C (1 C = 200 mA g −1 ) at a high cutoff voltage of 4.5 V and a capacity retention rate of 82.2% after 200 cycles at 1 C. Meanwhile, the capacity retention rate is up to 77.0% after 250 cycles at a current density of 5 C. This work is a guideline for the subsequent study of stabilizing the ontological structure of single-crystal cathode materials.

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“…Al, Cu and Fe are well-controlled, although these impurities can be beneficial in boosting electrochemical performance as a dopant. [155][156][157][158][159] For example in low dopant quantities, Fe improves cycle stability of LiNi 1/3 Mn 1/3 Co 1/3 Fe 0.01 O 2 , most likely via suppressing active material dissolution. However at high dopant quantity, cation mixing among Fe 3+ /Ni 2+ /Li + results in poor rate performance, and a decreased discharge capacity.…”

Section: Regenerationmentioning

confidence: 99%

Toward practical lithium-ion battery recycling: adding value, tackling circularity and recycling-oriented design

Mao

Zhang

et al. 2022

Energy Environ. Sci.

158

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The role of Cu impurity on the structure and electrochemical performance of Ni-rich cathode material for lithium-ion batteries

Cited by 29 publications

References 40 publications

Manganese and Cobalt-Free Ultrahigh-Ni-Rich Single-Crystal Cathode for High-Performance Lithium Batteries

Manganese and Cobalt-Free Ultrahigh-Ni-Rich Single-Crystal Cathode for High-Performance Lithium Batteries

Dual-Site Doping of Cu²⁺ Enables High Voltage Stability and Rate Performance of Single-Crystal LiNi_0.5Co_0.2Mn_0.3O₂ for Li-Ion Batteries

Toward practical lithium-ion battery recycling: adding value, tackling circularity and recycling-oriented design

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The role of Cu impurity on the structure and electrochemical performance of Ni-rich cathode material for lithium-ion batteries

Cited by 29 publications

References 40 publications

Manganese and Cobalt-Free Ultrahigh-Ni-Rich Single-Crystal Cathode for High-Performance Lithium Batteries

Manganese and Cobalt-Free Ultrahigh-Ni-Rich Single-Crystal Cathode for High-Performance Lithium Batteries

Dual-Site Doping of Cu2+ Enables High Voltage Stability and Rate Performance of Single-Crystal LiNi0.5Co0.2Mn0.3O2 for Li-Ion Batteries

Toward practical lithium-ion battery recycling: adding value, tackling circularity and recycling-oriented design

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Product

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Dual-Site Doping of Cu²⁺ Enables High Voltage Stability and Rate Performance of Single-Crystal LiNi_0.5Co_0.2Mn_0.3O₂ for Li-Ion Batteries