Synergistic effect of Na and Al co-doping on the electrochemical properties of Li[Ni0.8Mn0.1Co0.1]O2 cathode materials for Li-ion batteries

Ko, Gyeongbin; Park, Sanghyuk; Kim, Woo Seok; Kwon, Kyungjung

doi:10.1016/j.jallcom.2022.166678

Cited by 19 publications

(3 citation statements)

References 52 publications

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“…Moreover, the potential difference between the anodic and cathode peaks (ΔE) is used to evaluate the reversibility of electrochemical reaction, and a low ΔE commonly indicates the reduced electrochemical polarization and enhanced ion transport rate. [30][31][32][33] The Co-Sb 4 O 5 Cl 2 @GO/Ag system shows a reduced ΔV of 0.51 V, while the Co-Sb 4 O 5 Cl 2 @GO/Ag system reveals a much higher ΔV of 0.66 V, implying that the Co dopant could reduce electrochemical polarization and promote ion transport rate during battery operation. [30] Figure 4 (a) and (b) show galvanostatic charge-discharge (GCD) profiles in a potential range of 0.05-1.2 V for the Sb 4 O 5 Cl 2 @GO/Ag and Co-Sb 4 O 5 Cl 2 @GO/Ag respectively.…”

Section: Electrochemical Performancementioning

confidence: 99%

Effect of Cobalt on Lifetime of Sb₄O₅Cl₂‐Graphene Anode in Chloride‐Ion Batteries

Shen,

Lu,

Shen

et al. 2024

ChemSusChem

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Anode materials based on metal oxychlorides hold promise in addressing electrode dissolution challenges in aqueous‐based chloride ion batteries (CIBs). However, their structural instability following chloride ion deintercalation can lead to rapid degradation and capacity fading. This paper investigates a cobalt‐doped Sb4O5Cl2‐graphene (Co‐Sb4O5Cl2@GO) composite anode for aqueous‐based CIBs. It exhibits significantly enhanced discharge capacity of 82.3 mAh g‐1 after 200 cycles at 0.3 A g‐1; while, the undoped comparison is only 23.5 mAh g‐1 in the same condition. It also demonstrated with a long‐term capacity retention of 72.8% after 1000 cycles (65.5 mAh g‐1) and a favorable rate performance of 25 mAh g‐1 at a high current density of 2 A g‐1. Undertaken comprehensive studies via in‐situ experiments and DFT calculations, the cobalt (Co) dopant is demonstrated as the crucial role to enhance the lifetime of Sb4O5Cl2‐based anodes. It is found that, the Co dopant improves electronic conductivity and the diffusion of chloride ions beside increases the structural stability of Sb4O5Cl2 crystal. Thus, this element doping strategy holds promise for advancing the field of Sb4O5Cl2‐based anodes for aqueous‐based CIBs，and insights gain from this study also offer valuable knowledge to develop high‐performance electrode materials for electrochemical deionization.

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Section: Electrochemical Performancementioning

confidence: 99%

Effect of Cobalt on Lifetime of Sb₄O₅Cl₂‐Graphene Anode in Chloride‐Ion Batteries

Shen,

Lu,

Shen

et al. 2024

ChemSusChem

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“…However, simultaneous dual-site doping of both Li and transition-metal sites offers even greater potential advantages compared to single-site doping alone. Various studies on double-site doping, such as Mg/Mn, − Mg/Cu, Mg/Zr, and Na/Al, − among others, have been reported, demonstrating the wide range of possibilities and the potential for further advancements in cathode material design. Mg and Al, being cost-effective and readily available elements, are frequently employed for the modification of Ni-rich layered oxide cathode materials.…”

Section: Introductionmentioning

confidence: 99%

Mg/Al Double-Pillared LiNiO₂ as a Co-Free Ternary Cathode Material Ensuring Stable Cycling at 4.6 V

Zhou,

Chu,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Cobalt-free (Co-free) and nickel-rich (Ni-rich) cathode materials have attracted significant attention and undergone extensive studies due to their affordability and superior energy density. However, the commercialization of these Co-free materials is hindered by challenges such as cation disorder, irreversible phase changes, and inadequate high-voltage performance. To overcome these challenges, a Co-free ternary cathode material of Mg/Al double-pillared LiNiO 2 (NMA) synthesized via a wet-coating and lithiation-sintering technique is proposed. Fundamental studies reveal that Mg and Al have the potential to form a distinctive double-pillar structure within the layered cathode, enhancing its structural stability. To be specific, the strategic placement of Mg and Al in Li and Ni layers, respectively, effectively reduces Li + /Ni 2+ disorder and prevents irreversible phase transitions. Additionally, the inclusion of Mg and Al refines the primary grains and compacts the secondary grains in the cathode material, reducing stress from cyclic usage and preventing material cracking, thereby mitigating electrolyte erosion. As a result, NMA demonstrates exceptional electrochemical performance under a high charge cutoff voltage of 4.6 V. It maintains 70% of initial specific capacity after 500 cycles at 1 C and exhibits excellent rate performance, with a capacity of 162 mAh g −1 at 5 C and 149 mAh g −1 at 10 C. As a whole, the produced NMA achieves a high structural stability in cases of excessive delithiation, providing a groundbreaking solution for the development of cost-effective and high-energy-density cathode materials for lithium-ion batteries.

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“…Kim used the cosolvent KCl or NaCl to obtain the single-crystal high-nickel cathode material LiNi 0.8 Co 0.1 Mn 0.1 O 2 with different morphologies and particle size distributions at different synthesis temperatures and achieved excellent cycle stability . In addition to the important role of single-crystal structure in eliminating microcracks, doping and coating are significant means to solve the crystal structure collapse and surface/interface side reactions. − Doping of ions such as Na + , Mg 2+ , Al 3+ , Zr 4+ , Nb 5+ , and F – has been demonstrated to have an outstanding effect in stabilizing the crystal structure. Metal oxides, such as Al 2 O 3 and ZrO 2 ; metal fluorides, such as AlF 3 and MgF 2 ; metal phosphates, such as AlPO 4 and Li 3 PO 4 ; and organic compounds, such as PMMA and PANI, are considered excellent coatings to isolate surface/interface side reactions.…”

Section: Introductionmentioning

confidence: 99%

One-Step Synthesis of a Single-Crystal LiNi_0.83Co_0.11Mn_0.06O₂ Cathode with Excellent Electrochemical Properties by Ti⁴⁺ Doping and LiTi₂O₄ In Situ Chemical Coating Using a Novel Variable Temperature Sintering Process

Peng

Liu

et al. 2023

ACS Appl. Energy Mater.

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High-nickel ternary material is one of the most promising cathode materials with high energy density. However, this material has the disadvantages of poor cycling stability, poor thermal stability, and low safety. The synergetic effect of single crystal, element doping, and surface coating is an effective way to improve its electrochemical performance. In this work, the particle size of the single-crystal LiNi 0.83 Co 0.11 Mn 0.06 O 2 (NCM811) material was controlled by LiCl−KCl flux, and the internal/ external synergy of Ti 4+ doping and LiTi 2 O 4 coating was realized by the pretreatment of Ti(OC 4 H 9 ) 4 and a subsequent new temperature-changing sintering process. The single-crystal structure greatly improved the crushing of material, the Ti 4+ doping effectively broadened the lattice spacing and stabilized the layered structure, and the uniform LiTi 2 O 4 coating effectively eliminated excess lithium salts and promoted the stability of the interface structure. The electrochemical test results showed that the modified materials had excellent electrochemical properties, especially a high lithium-ion diffusion rate and high cycle stability. Therefore, it will provide a solid technical support for the synthesis of highperformance single-crystal high-nickel ternary cathode materials.

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Synergistic effect of Na and Al co-doping on the electrochemical properties of Li[Ni0.8Mn0.1Co0.1]O2 cathode materials for Li-ion batteries

Cited by 19 publications

References 52 publications

Effect of Cobalt on Lifetime of Sb₄O₅Cl₂‐Graphene Anode in Chloride‐Ion Batteries

Effect of Cobalt on Lifetime of Sb₄O₅Cl₂‐Graphene Anode in Chloride‐Ion Batteries

Mg/Al Double-Pillared LiNiO₂ as a Co-Free Ternary Cathode Material Ensuring Stable Cycling at 4.6 V

One-Step Synthesis of a Single-Crystal LiNi_0.83Co_0.11Mn_0.06O₂ Cathode with Excellent Electrochemical Properties by Ti⁴⁺ Doping and LiTi₂O₄ In Situ Chemical Coating Using a Novel Variable Temperature Sintering Process

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Synergistic effect of Na and Al co-doping on the electrochemical properties of Li[Ni0.8Mn0.1Co0.1]O2 cathode materials for Li-ion batteries

Cited by 19 publications

References 52 publications

Effect of Cobalt on Lifetime of Sb4O5Cl2‐Graphene Anode in Chloride‐Ion Batteries

Effect of Cobalt on Lifetime of Sb4O5Cl2‐Graphene Anode in Chloride‐Ion Batteries

Mg/Al Double-Pillared LiNiO2 as a Co-Free Ternary Cathode Material Ensuring Stable Cycling at 4.6 V

One-Step Synthesis of a Single-Crystal LiNi0.83Co0.11Mn0.06O2 Cathode with Excellent Electrochemical Properties by Ti4+ Doping and LiTi2O4 In Situ Chemical Coating Using a Novel Variable Temperature Sintering Process

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Effect of Cobalt on Lifetime of Sb₄O₅Cl₂‐Graphene Anode in Chloride‐Ion Batteries

Effect of Cobalt on Lifetime of Sb₄O₅Cl₂‐Graphene Anode in Chloride‐Ion Batteries

Mg/Al Double-Pillared LiNiO₂ as a Co-Free Ternary Cathode Material Ensuring Stable Cycling at 4.6 V

One-Step Synthesis of a Single-Crystal LiNi_0.83Co_0.11Mn_0.06O₂ Cathode with Excellent Electrochemical Properties by Ti⁴⁺ Doping and LiTi₂O₄ In Situ Chemical Coating Using a Novel Variable Temperature Sintering Process