Preparation of long-term cycling stable ni-rich concentration–gradient NCMA cathode materials for li-ion batteries

Jeyakumar, Juliya; Seenivasan, Manojkumar; Wu, Yi‐Shiuan; Wu, She‐Huang; Chang, Jeng‐Kuei; Jose, Rajan; Yang, Chun–Chen

doi:10.1016/j.jcis.2023.02.064

Cited by 23 publications

(5 citation statements)

References 42 publications

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“…A Ni-rich hydroxide precursor, Ni 0.90 Co 0.04 Mn 0.03 Al 0.03 (OH) 2 , was synthesized using a Couette–Taylor flow reactor through a chemical coprecipitation route, as reported in our previous work . A homogeneous aqueous solution of 2.0 mol L –1 of NiSO 4 · 6H 2 O, CoSO 4 · 7H 2 O, MnSO 4 · H 2 O, and Al 2 (SO 4 ) 3 · 6H 2 O in deionized (DI) water was prepared and fed into the reaction apparatus.…”

Section: Methodsmentioning

confidence: 99%

“…A Ni-rich hydroxide precursor, Ni 0.90 Co 0.04 Mn 0.03 Al 0.03 (OH) 2 , was synthesized using a Couette−Taylor flow reactor through a chemical coprecipitation route, as reported in our previous work. 21 A homogeneous aqueous solution of 2.0 mol L −1 of NiSO O in deionized (DI) water was prepared and fed into the reaction apparatus. NH 4 OH and NaOH were used as chelating and precipitating agents, respectively.…”

Section: Cathode Materials Preparationmentioning

confidence: 99%

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Sn-Doped/Coated Ni-Rich LiNi_0.90Co_0.04Mn_0.03Al_0.03O₂ Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries

Jeyakumar,

Seenivasan,

et al. 2024

ACS Appl. Energy Mater.

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Ultrahigh nickel-rich cathode materials possess high gravimetric capacity but are restricted by poor structural stability and aggressive deterioration on long cycling. In this study, a doping-coating strategy for the Ni-rich LiNi 0.90 Co 0.04 Mn 0.03 Al 0.03 O 2 (denoted as NCMA) cathode is proposed, with the addition of various mol % Sn to achieve Sn doping (SnO 2 was used as a dopant to replace Ni) and coating. The physical and electrochemical properties of the modified cathode material were studied using scanning electron microscopy (SEM), X-ray diffraction (XRD), in situ XRD analysis, X-ray photoelectron spectroscopy (XPS), and Galvanostatic charge−discharge (GCD). The substitution of Sn 4+ ions had no adverse impact on the crystal structure while alleviating the strain on the c-axis contraction, as confirmed by in situ XRD analysis. The strong Sn−O bond reinforced the structural integrity, while the inert coating layer helped build robust interfacial stability on prolonged cycling compared to that of an unmodified cathode. Doping with an appropriate amount of Sn 4+ resulted in a marked improvement in the electrochemical performance of the LiNi 0.90−x Co 0.04 Mn 0.03 Al 0.03 Sn x O 2 (where x = 0, 0.003, 0.006, and 0.012) cathode material. The optimal performance was achieved when x = 0.006; the Sn-modified LiNi 0.90 Co 0.04 Mn 0.03 Al 0.03 O 2 cathode exhibited a discharge capacity of 203.5 mAh g −1 and capacity retention of ∼93% after 100 cycles and ∼83% after 200 cycles at 4.3 V, along with ∼88% retention at 4.5 V after 100 cycles at 1 C. The performance difference was more pronounced at higher rates, with the Sn-0.6 sample exhibiting an improved discharge capacity of 142.3 mAh g −1 at 10 C, compared to that of the bare LiNi 0.90 Co 0.04 Mn 0.03 Al 0.03 O 2 (100.6 mAh g −1 ). Our proposed simultaneous doping-coating strategy using Sn for LiNi 0.90 Co 0.04 Mn 0.03 Al 0.03 O 2 presents a viable approach for enhancing the performance of Ni-rich cathode materials. KEYWORDS: lithium-ion battery, LiNi 0.90 Co 0.04 Mn 0.03 Al 0.03 O 2 , surface coating, doping, SnO 2

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Section: Methodsmentioning

confidence: 99%

Section: Cathode Materials Preparationmentioning

confidence: 99%

Sn-Doped/Coated Ni-Rich LiNi_0.90Co_0.04Mn_0.03Al_0.03O₂ Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries

Jeyakumar,

Seenivasan,

et al. 2024

ACS Appl. Energy Mater.

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“…To restrict such side reactions, concentration gradient (CG) is a widely applied strategy in battery research. 108 Furthermore, several other strategies (Fig. 9c), in particular potentiostatic reduction (PR), an effective strategy that controls the CEI, can be used to extract optimum electrochemical performance in LIBs effectively.…”

Section: Dalton Transactions Perspectivementioning

confidence: 99%

Decoding the puzzle: recent breakthroughs in understanding degradation mechanisms of Li-ion batteries

Singh,

Hassan,

Bathula

et al. 2023

Dalton Trans.

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“…On the way to develop high-energy batteries, high-nickel layered-structure material is widely applied as a cathode for Li-ion cells [1][2][3]. However, its relative unstable structure raises concerns on safety issues [4][5][6][7]. Compared to conventional layered-structure cathodes, including LiNi 1−x−y Co x Mn y O 2 (NCM) and LiNi 1−x−y Co x Al y O 2 (NCA), LiNi 1−x−y−z Co x Mn y Al z O 2 (NCMA) shows more benefits for (a) low cost-Al was selected to partially substitute expensive Co element while maintain the material's high specific capacity; (b) extra cycling stability-NCM volume contraction/expansion during the H2 ↔ H3 phase transition is slightly reduced by Al doping; and (c) enhanced thermal stability-NCMA is structurally stable due to the synergetic effect of Al and Mn ions stabilizing the layered structure and delaying the thermally induced phase transitions [2,8].…”

Section: Introductionmentioning

confidence: 99%

Interaction between LMFP and NCMA and Its Effect on Blending Cathode-Based Cells

Liu,

Chen,

Kong

et al. 2024

Energies

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Li-ion cells with a LiMnxFe1−xPO4 (LMFP) and LiNi1−x−y−zCoxMnyAlzO2 (NCMA) blending cathode show their benefits of lower cost and higher safety compared to barely NCMA cathode-based cells. However, the rate capability of LMFP material is relatively poor compared to NCMA or even LiFePO4, which is because of the low electronic conductivity of LMFP material and the 1D diffusion channel in its structure. This work discusses the effect on electrochemical performance when blends of various ratios of LMFP are used in an NCMA cathode, with data verified by a 5 Ah pouch cell. This work further investigated the interaction between NCMA and LMFP during charge/discharge. Combining results from experiment and simulation, it evidences that blending more LMFP does not always lead to worse discharge rate but reduces charge rate. Moreover, it is found that, in a constant current discharge/charge process, although the system is under continuous discharge/charge, LMFP works intermittently. This leads to different diffusion polarization states of LMFP in the discharge/charge process and further results in a difference in discharge/charge rate capability. Therefore, to improve rate capability, especially charging rate, using smaller-sized or doped LMFP to improve its diffusion coefficient is an optimized strategy.

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Preparation of long-term cycling stable ni-rich concentration–gradient NCMA cathode materials for li-ion batteries

Cited by 23 publications

References 42 publications

Sn-Doped/Coated Ni-Rich LiNi_0.90Co_0.04Mn_0.03Al_0.03O₂ Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries

Sn-Doped/Coated Ni-Rich LiNi_0.90Co_0.04Mn_0.03Al_0.03O₂ Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries

Decoding the puzzle: recent breakthroughs in understanding degradation mechanisms of Li-ion batteries

Interaction between LMFP and NCMA and Its Effect on Blending Cathode-Based Cells

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Preparation of long-term cycling stable ni-rich concentration–gradient NCMA cathode materials for li-ion batteries

Cited by 23 publications

References 42 publications

Sn-Doped/Coated Ni-Rich LiNi0.90Co0.04Mn0.03Al0.03O2 Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries

Sn-Doped/Coated Ni-Rich LiNi0.90Co0.04Mn0.03Al0.03O2 Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries

Decoding the puzzle: recent breakthroughs in understanding degradation mechanisms of Li-ion batteries

Interaction between LMFP and NCMA and Its Effect on Blending Cathode-Based Cells

Contact Info

Product

Resources

About

Sn-Doped/Coated Ni-Rich LiNi_0.90Co_0.04Mn_0.03Al_0.03O₂ Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries

Sn-Doped/Coated Ni-Rich LiNi_0.90Co_0.04Mn_0.03Al_0.03O₂ Cathode Materials for Improved Electrochemical Performance of Li-Ion Batteries