Tuning local chemistry of P2 layered-oxide cathode for high energy and long cycles of sodium-ion battery

Chenchen Wang; Luojia Liu; Shuo Zhao; Yanchen Liu; Yubo Yang; Haijun Yu; Suwon Lee; Gi-Hyeok Lee; Yong-Mook Kang; Rong Liu; Fujun Li; Jun Chen

doi:10.1038/s41467-021-22523-3

Tuning local chemistry of P2 layered-oxide cathode for high energy and long cycles of sodium-ion battery

Chenchen Wang, Luojia Liu, Shuo Zhao, Yanchen Liu, Yubo Yang, Haijun Yu, Suwon Lee, Gi-Hyeok Lee, Yong-Mook Kang, Rong Liu, Fujun Li, Jun Chen

Western Sydney University

Research output: Contribution to journal › Article › peer-review

390 Citations (Scopus)

Abstract

Layered transition-metal oxides have attracted intensive interest for cathode materials of sodium-ion batteries. However, they are hindered by the limited capacity and inferior phase transition due to the gliding of transition-metal layers upon Na⁺ extraction and insertion in the cathode materials. Here, we report that the large-sized K⁺ is riveted in the prismatic Na⁺ sites of P2-Na_0.612K_0.056MnO₂ to enable more thermodynamically favorable Na⁺ vacancies. The Mn-O bonds are reinforced to reduce phase transition during charge and discharge. 0.901 Na⁺ per formula are reversibly extracted and inserted, in which only the two-phase transition of P2 ↔ P’2 occurs at low voltages. It exhibits the highest specific capacity of 240.5 mAh g⁻¹ and energy density of 654 Wh kg⁻¹ based on the redox of Mn³⁺/Mn⁴⁺, and a capacity retention of 98.2% after 100 cycles. This investigation will shed lights on the tuneable chemical environments of transition-metal oxides for advanced cathode materials and promote the development of sodium-ion batteries.

Original language	English
Article number	2256
Pages (from-to)	1-10
Number of pages	9
Journal	Nature Communications
Volume	12
Issue number	1
DOIs	https://doi.org/10.1038/s41467-021-22523-3
Publication status	Published - 1 Dec 2021

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10.1038/s41467-021-22523-3

Cite this

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abstract = "Layered transition-metal oxides have attracted intensive interest for cathode materials of sodium-ion batteries. However, they are hindered by the limited capacity and inferior phase transition due to the gliding of transition-metal layers upon Na+ extraction and insertion in the cathode materials. Here, we report that the large-sized K+ is riveted in the prismatic Na+ sites of P2-Na0.612K0.056MnO2 to enable more thermodynamically favorable Na+ vacancies. The Mn-O bonds are reinforced to reduce phase transition during charge and discharge. 0.901 Na+ per formula are reversibly extracted and inserted, in which only the two-phase transition of P2 ↔ P{\textquoteright}2 occurs at low voltages. It exhibits the highest specific capacity of 240.5 mAh g−1 and energy density of 654 Wh kg−1 based on the redox of Mn3+/Mn4+, and a capacity retention of 98.2% after 100 cycles. This investigation will shed lights on the tuneable chemical environments of transition-metal oxides for advanced cathode materials and promote the development of sodium-ion batteries.",

author = "Chenchen Wang and Luojia Liu and Shuo Zhao and Yanchen Liu and Yubo Yang and Haijun Yu and Suwon Lee and Gi-Hyeok Lee and Yong-Mook Kang and Rong Liu and Fujun Li and Jun Chen",

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AU - Zhao, Shuo

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AU - Yang, Yubo

AU - Yu, Haijun

AU - Lee, Suwon

AU - Lee, Gi-Hyeok

AU - Kang, Yong-Mook

AU - Liu, Rong

AU - Li, Fujun

AU - Chen, Jun

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N2 - Layered transition-metal oxides have attracted intensive interest for cathode materials of sodium-ion batteries. However, they are hindered by the limited capacity and inferior phase transition due to the gliding of transition-metal layers upon Na+ extraction and insertion in the cathode materials. Here, we report that the large-sized K+ is riveted in the prismatic Na+ sites of P2-Na0.612K0.056MnO2 to enable more thermodynamically favorable Na+ vacancies. The Mn-O bonds are reinforced to reduce phase transition during charge and discharge. 0.901 Na+ per formula are reversibly extracted and inserted, in which only the two-phase transition of P2 ↔ P’2 occurs at low voltages. It exhibits the highest specific capacity of 240.5 mAh g−1 and energy density of 654 Wh kg−1 based on the redox of Mn3+/Mn4+, and a capacity retention of 98.2% after 100 cycles. This investigation will shed lights on the tuneable chemical environments of transition-metal oxides for advanced cathode materials and promote the development of sodium-ion batteries.

AB - Layered transition-metal oxides have attracted intensive interest for cathode materials of sodium-ion batteries. However, they are hindered by the limited capacity and inferior phase transition due to the gliding of transition-metal layers upon Na+ extraction and insertion in the cathode materials. Here, we report that the large-sized K+ is riveted in the prismatic Na+ sites of P2-Na0.612K0.056MnO2 to enable more thermodynamically favorable Na+ vacancies. The Mn-O bonds are reinforced to reduce phase transition during charge and discharge. 0.901 Na+ per formula are reversibly extracted and inserted, in which only the two-phase transition of P2 ↔ P’2 occurs at low voltages. It exhibits the highest specific capacity of 240.5 mAh g−1 and energy density of 654 Wh kg−1 based on the redox of Mn3+/Mn4+, and a capacity retention of 98.2% after 100 cycles. This investigation will shed lights on the tuneable chemical environments of transition-metal oxides for advanced cathode materials and promote the development of sodium-ion batteries.

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Tuning local chemistry of P2 layered-oxide cathode for high energy and long cycles of sodium-ion battery

Abstract

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UN SDGs

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