Achieving high-energy and long-cycling aqueous zinc-metal batteries by highly reversible insertion mechanisms in Ti-substituted Na0.44MnO2 cathode

Wang, Kaidi; Guo, Gaoli; Tan, Xiaoping; Zheng, Leilei; Zhang, Huang

doi:10.1016/j.cej.2022.139059

Cited by 21 publications

(12 citation statements)

References 70 publications

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“…For pristine NMO, three peaks located at 529.6, 531.1, and 532.2 eV were assigned to the crystal oxygen, oxygen defects, and absorbed oxygen, respectively. For NTO-NMO, the intensity of oxygen defects reduces significantly, which was also observed in Ti-substituted NMOs, further confirming the existence of the Ti-doped transition layer . This is probably attributed to the strong Ti–O binding that reduces the loss of O atoms and stabilizes Mn ions in the structure.…”

Section: Resultssupporting

confidence: 63%

“…For NTO-NMO, the intensity of oxygen defects reduces significantly, which was also observed in Ti-substituted NMOs, further confirming the existence of the Ti-doped transition layer. 34 This is probably attributed to the strong Ti−O binding that reduces the loss of O atoms and stabilizes Mn ions in the structure. As proposed in the previous report, 35 oxygen defects will lower the voltage platform and cause instability.…”

Section: Introductionmentioning

confidence: 99%

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Multifunctional Na₂TiO₃ Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na_0.44MnO₂

Cao

Xiao

Dong

et al. 2023

ACS Appl. Mater. Interfaces

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Sodium-ion batteries, as an attractive option for large-scale energy storage, still face the problems of low energy density and unsatisfactory rate performance. Among various cathodes, the tunnel-type Na 0.44 MnO 2 with large S-shaped Na + transport tunnels is one of the promising cathode materials for fast and robust sodium-ion storage, yet suffering from Mn dissolution and structural collapse. Herein, a Na-rich layered oxide Na 2 TiO 3 is first constructed as a multifunctional coating layer on the surface of the Na 0.44 MnO 2 nanorod. Na 2 TiO 3 not only acts as an Na + reservoir, but also serves as a protective layer to prevent Na 0.44 MnO 2 from electrolyte etching. Besides, the derived Ti-doped Na 0.44 MnO 2 transition layer supplies additional Na + diffusion pathways along the radial direction of the nanorod with a short migration distance. The optimized 3 wt % Na 2 TiO 3 -coated Na 0.44 MnO 2 exhibits enhanced an initial capacity of 127 mAh g −1 at 2−4.5 V. In addition, it shows an ultra-high capacitive-like capacity ratio of 96.7%, hence delivering an excellent rate performance of 80.2 mAh g −1 at 20C. Long-term cycling tests indicate splendid stability against high voltage, achieving 97.7% capacity retention at 20C after 900 cycles. This work provides an effective strategy to improve the rate performance and high-voltage stability of Na 0.44 MnO 2 for high energy and power density batteries.

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Section: Resultssupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Multifunctional Na₂TiO₃ Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na_0.44MnO₂

Cao

Xiao

Dong

et al. 2023

ACS Appl. Mater. Interfaces

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show abstract

Section: Resultsmentioning

confidence: 99%

“…The GCD curve shows the oxidation/reduction plateau for the redox conversion of manganese due to the co-insertion/extraction of Zn 2+ and H + ions, which correspond to the CV curve. [62][63][64] The long-term current cycling performance of the Zn/b-MnO 2 full cell using different electrolytes at 1 A g À1 was measured. It could be seen from Fig.…”

Section: Electrochemical Performance Of Full Cellsmentioning

confidence: 99%

Study of a novel supramolecular hydrogel electrolyte for aqueous zinc ion batteries

Yang

Huang

et al. 2023

J. Mater. Chem. C

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“…Na 0.44 MnO 2 (NMO) is a promising cathode among NaMO 2 (M = transition metal) materials and has a relatively high theoretical capacity (∼122 mA h g –1 ) in the 2.0–4.0 V potential window. − The crystal structure of NMO consists of a large S-shape and a smaller pentagon tunnel formed by the combination of the MnO 5 square pyramids and MnO 6 octahedra. Half of the Mn 3+ ions are in the MnO 5 square pyramids, while the remaining half and all the Mn 4+ ions are in the octahedral MnO 6 structure. , S-shaped tunnels, serving as fast ion diffusion pathways, are ideal for large Na + ions.…”

Section: Introductionmentioning

confidence: 99%

Tunnel/Layer Composite Na_0.44MnO₂ Cathode Material with Enhanced Structural Stability via Cobalt Doping for Sodium-Ion Batteries

2023

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Sodium-ion batteries (SIBs) are the most promising alternative to lithium-ion batteries (LIBs) due to their low cost and environmental friendliness; therefore, enhancing the performance of SIBs’ components is crucial. Although most of the studies have focused on single-phase cathode electrodes, these materials have difficulty in meeting the requirements in practice. At this point, composite materials show superior performance due to balancing different structures and are offered as an alternative to single-phase cathodes. In this study, we synthesized a Na0.44MnO2/Na0.7MnO2.05 composite material in a single step with cobalt substitution. Changes in the crystal structure and the physical and electrochemical properties of the composite and bare structures were studied. We report that even if the initial capacity is slightly lower, the rate and cyclic performance of the 1% Co-substituted composite sample (CO10) are superior to the undoped Na0.44MnO2 (NMO) and 5% Co-substituted (CO50) samples after 100 cycles. The results show that with the composite cathode phase transformations are suppressed, structural degradation is prevented, and better battery performance is achieved.

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Achieving high-energy and long-cycling aqueous zinc-metal batteries by highly reversible insertion mechanisms in Ti-substituted Na0.44MnO2 cathode

Cited by 21 publications

References 70 publications

Multifunctional Na₂TiO₃ Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na_0.44MnO₂

Multifunctional Na₂TiO₃ Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na_0.44MnO₂

Study of a novel supramolecular hydrogel electrolyte for aqueous zinc ion batteries

Tunnel/Layer Composite Na_0.44MnO₂ Cathode Material with Enhanced Structural Stability via Cobalt Doping for Sodium-Ion Batteries

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Achieving high-energy and long-cycling aqueous zinc-metal batteries by highly reversible insertion mechanisms in Ti-substituted Na0.44MnO2 cathode

Cited by 21 publications

References 70 publications

Multifunctional Na2TiO3 Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na0.44MnO2

Multifunctional Na2TiO3 Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na0.44MnO2

Study of a novel supramolecular hydrogel electrolyte for aqueous zinc ion batteries

Tunnel/Layer Composite Na0.44MnO2 Cathode Material with Enhanced Structural Stability via Cobalt Doping for Sodium-Ion Batteries

Contact Info

Product

Resources

About

Multifunctional Na₂TiO₃ Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na_0.44MnO₂

Multifunctional Na₂TiO₃ Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of Na_0.44MnO₂

Tunnel/Layer Composite Na_0.44MnO₂ Cathode Material with Enhanced Structural Stability via Cobalt Doping for Sodium-Ion Batteries