Sodium superionic conductor NaTi2(PO4)3 surface layer modified P2-type Na2/3Ni1/3Mn2/3O2 as high-performance cathode for sodium-ion batteries

Li, Haiming; Wang, Tailin; Wang, Xue; Li, Guangda; Du, Yi; Shen, Jianxing; Chai, Jinling

doi:10.1016/j.jpowsour.2021.229771

Cited by 39 publications

(42 citation statements)

References 46 publications

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“…Furthermore, an additional pair of weakly redox peaks can be observed at around 2.4 V and a small anodic peak existed around 4.0 V. This is due to the dissolution of manganese caused by disproportionation reactions of Mn 3+ (Mn 3+ → Mn 4+ + Mn 2+ ). During the first charging process, a part of Mn 3+ dissolved in the electrolyte loses electrons oxidized to Mn 4+ , which resulted in a small anodic peak presented around 4.0 V. In the next discharge/charge to around 2.4 V, a pair of weak peaks corresponding to the Mn 3+/2+ redox transformation existed in the electrolyte. ,− The electrochemical performance was further verified by a galvanostatic charge–discharge test. The charge–discharge curves (Figure b) under various rates also show that there are three platforms in the charging and discharging process, which is consistent with the CV results.…”

Section: Resultsmentioning

confidence: 96%

“…), Prussian blue analogues (PBAs), and polyanion compounds (NaFePO 4 , NaMnPO 4 , Na 3 V 2 (PO 4 ) 3 , etc. ). − Na x MO 2 and PBAs are usually studied as electrode materials; however, there are disadvantages like huge volume changes during charging–discharging and high toxicity. Excitedly, the sodium super ion conductor (NASICON) structure materials are a key member in polyanion compounds with a robust crystal structure, high safety, and flexibility to regulate element and valence. − …”

Section: Introductionmentioning

confidence: 99%

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Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Liu

Huang

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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The sodium super ion conductor (NASICON) structure materials are essential for sodium-ion batteries (SIBs) due to their robust crystal structure, excellent ionic conductivity, and flexibility to regulate element and valence. However, the poor electronic conductivity and inferior energy density caused by the nature of these materials have always been obstacles to commercialization. Herein, using yeast as a template to derive NASICON structure Na 3 MnTi(PO 4 ) 3 (NMTP) materials (noted as Yeast@NMTP/C) is presented. The Yeast@NMTP/C material retains the microsphere morphology of the yeast template and not only controls the particle size (around 2 μm) to shorten the Na + diffusion pathways but also improves the electronic conductivity to optimize the electrochemical kinetics. The Yeast@NMTP/C cathode delivers reversible multielectron redox reactions including Ti 4+/3+ , Mn 3+/2+ , and Mn 4+/3+ and exhibits a high capacity of 108.5 mAh g −1 with a 79.2% capacity retention after 1000 cycles at a 2C rate. The sodium storage mechanism of Yeast@NMTP/C reveals that the addition of Ti 4+/3+ redox plays a key role in improving the Na + diffusion kinetics, and both solid-solution and twophase reactions take place during the desodiation and sodiation process. Additionally, the high-rate and long-span cycle performance of Yeast@NMTP/C at 10C is ascribed to contribute to pseudocapacitance.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Liu

Huang

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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“…23,24 The coating materials should have properties such as chemical stability, electrochemical stability, mechanical stability, good ionic conductivity, and electronic conductivity. Oxides (Al 2 O 3 , ZrO 2 , Co 3 O 4 ), 15,24,25,26 phosphates (NaPO 3 , AlPO 4, FePO 4 ), [27][28][29] and conductive carbon 30,31 have been used as coating materials, and the cycle stability of cathode materials is effectively improved. Among them, graphite has high electronic conductivity, which can increase the surface conductivity of the cathode material.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Na ion‐electron mixed conductor Na₃Zr₂Si₂PO₁₂ by doping with transition metal elements (Co, Fe, Ni)

et al. 2022

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NASICON solid electrolyte Na 3 Zr 2 Si 2 PO 12 (NZSP) exhibits high chemical stability and can be utilized as cladding materials of cathodes to improve battery cycle stability. However, the electronic conductivity of NZSP is extremely low (∼10 −9 S cm −1 ), which will hinder the electron conduction of cathode materials.To address this issue, the electronic conductivity of NZSP is improved by doping with transition metal elements (Co, Fe, Ni). Co-doped NZSP has an electronic conductivity of 5.03 × 10 −6 S cm −1 . On the other hand, the ionic conductivity of doped samples remains stable, even slightly increased. The mechanical properties of pristine and doped samples are characterized with a micro indenter, which is also a key parameter for coating materials.

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“…Moreover, it is well-known that sodium ions in the P2-type structure generally have a relatively lower migration barrier than those in the P3- and O3-type structures. , Among existing P2-type oxides, Na 0.66 Ni 0.33 Mn 0.67 O 2 is considered very appealing in terms of high voltage, relatively good air stability, and easy preparation. It also has several inherent drawbacks concerning irreversible phase transition, Na + /vacancy ordering, Mn dissolution, and electrolyte decomposition. − As a result, P2-type Na 0.66 Ni 0.33 Mn 0.67 O 2 is subjected to severe voltage decay and capacity loss during cycling. To tackle this problem, a facile strategy is confining the upper cutoff voltage to avoid the P2–O2 phase transition and the electrolyte decomposition induced by high lattice oxygen activity. , However, the voltage confinement strategy inevitably sacrifices the energy density and thus is not an ideal solution.…”

Section: Introductionmentioning

confidence: 99%

Stabilizing P2-Type Ni–Mn Oxides as High-Voltage Cathodes by a Doping-Integrated Coating Strategy Based on Zinc for Sodium-Ion Batteries

Zhang

Liao

et al. 2021

ACS Appl. Mater. Interfaces

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The key to development of high-voltage P2-type Na 0.66 Ni 0.33 Mn 0.67 O 2 is the modification methods that can effectively improve its electrochemical reversibility. Herein, a doping-integrated coating strategy based on zinc element is proposed to modify P2-type Na 0.66 Ni 0.33 Mn 0.67 O 2 , which can be achieved by a facile one-step solid-state reaction. The formation mechanism of Na 0.66 Ni 0.26 Zn 0.07 Mn 0.67 O 2 @0.06ZnO (NNZM@ 0.06ZnO) is investigated, revealing that the spinel and P3 intermediate phases appear prior to the formation of the P2 phase. Ni 2+ can be preferentially incorporated into the P2 structure in competition with Zn 2+ at high temperature, resulting in a uniform enrichment of ZnO on the surface. A small amount of Zn 2+ doping significantly suppresses the Na + /vacancy ordering effect and improves the structural reversibility. Furthermore, the electrolyte decomposition is effectively reduced because of the presence of the ZnO coating layer, leading to the formation of a thin cathode electrolyte interphase film that is favorable to fast Na + diffusion. In virtue of the Zn 2+ doping and in situ formed ZnO coating, NNZM@0.06ZnO exhibits excellent cycling stability with a capacity retention of 83.7% after 100 cycles at 100 mA g −1 and rate performance with a discharge capacity of 56.4 mAh g −1 at 2000 mA g −1 , which significantly outperforms the uncoated Na 0.66 Ni 0.26 Zn 0.07 Mn 0.67 O 2 and the Na 0.66 Ni 0.26 Zn 0.07 Mn 0.67 O 2 /0.06ZnO with the coating layer introduced by mechanical milling. This work provides a new strategy to design high-performance cathode materials for sodium-ion batteries.

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Sodium superionic conductor NaTi2(PO4)3 surface layer modified P2-type Na2/3Ni1/3Mn2/3O2 as high-performance cathode for sodium-ion batteries

Cited by 39 publications

References 46 publications

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Synthesis of Na ion‐electron mixed conductor Na₃Zr₂Si₂PO₁₂ by doping with transition metal elements (Co, Fe, Ni)

Stabilizing P2-Type Ni–Mn Oxides as High-Voltage Cathodes by a Doping-Integrated Coating Strategy Based on Zinc for Sodium-Ion Batteries

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Sodium superionic conductor NaTi2(PO4)3 surface layer modified P2-type Na2/3Ni1/3Mn2/3O2 as high-performance cathode for sodium-ion batteries

Cited by 39 publications

References 46 publications

Yeast Template-Derived Multielectron Reaction NASICON Structure Na3MnTi(PO4)3 for High-Performance Sodium-Ion Batteries

Yeast Template-Derived Multielectron Reaction NASICON Structure Na3MnTi(PO4)3 for High-Performance Sodium-Ion Batteries

Synthesis of Na ion‐electron mixed conductor Na3Zr2Si2PO12 by doping with transition metal elements (Co, Fe, Ni)

Stabilizing P2-Type Ni–Mn Oxides as High-Voltage Cathodes by a Doping-Integrated Coating Strategy Based on Zinc for Sodium-Ion Batteries

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Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Synthesis of Na ion‐electron mixed conductor Na₃Zr₂Si₂PO₁₂ by doping with transition metal elements (Co, Fe, Ni)