Manipulating Na occupation and constructing protective film of P2-Na0.67Ni0.33Mn0.67O2 as long-term cycle stability cathode for sodium-ion batteries

Sun, Yiran; Zhou, Pengfei; Liu, Siyu; Zhao, Zhongjun; Pan, Yihao; Shen, Xiangyan; Wu, Xiaozhong; Zhao, Jinping; Weng, Junying; Zhou, Jin

doi:10.1016/j.jechem.2023.09.042

Cited by 14 publications

(4 citation statements)

References 45 publications

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“…NNMO delivers a reversible capacity of 101 mA h g –1 at 150 mA g –1 , and it undergoes a fading process upon cycling, with a capacity retention of 46% after 200 cycles. The electrochemical performances of NNMO studied in this work are similar to the results reported previously . The poor cycling performance and dramatic capacity decay of NNMO are considered to be caused by Na/vacancy ordering rearrangement and the P2-OP4 phase transition in electrochemical performances …”

Section: Resultssupporting

confidence: 87%

“…The electrochemical performances of NNMO studied in this work are similar to the results reported previously. 48 The poor cycling performance and dramatic capacity decay of NNMO are considered to be caused by Na/vacancy ordering rearrangement and the P2-OP4 phase transition in electrochemical performances. 25 The charge−discharge profiles of HEO exhibit a comparatively smooth and sloping feature, as shown in Figure 3b, which is also confirmed by the broad CV curve in the initial cycle (Figure 3c).…”

Section: ■ Introductionmentioning

confidence: 99%

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Solid-Solution Reaction and Ultrasmall Volume Change in High-Entropy P2-type Layered Oxide Cathode for All-Climate Sodium-Ion Batteries

Jiang,

Li,

Luo

2024

ACS Sustainable Chem. Eng.

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P2-type layered oxide materials have attracted considerable interest because of their high safety and low cost. However, P2-type materials suffer from complicated Na + /vacancy ordering and undesirable phase transitions, resulting in staircaselike electrochemical curves accompanied by fast capacity fading and poor rate performance. A P2-type layered cathode material with high-entropy cation configurations, Na 0.85 Li 0.08 Mg 0.04 Ni 0.22 Al-(B) 0.04 Mn 0.62 O 2 (HEO), is designed and successfully synthesized in this work. The presence of various metal ions in the transition metal layers imposes an influence on the Na + /vacancy arrangement in the alkali layers, as evidenced by the change of the interlayer distance associated with the electrostatic repulsion. HEO exhibits a smooth electrochemical process without obvious voltage plateaus within 2.0−4.3 V and delivers a reversible capacity of 115 mA h g −1 . Structural characterizations indicate that HEO undergoes a complete solid−solution reaction without undesirable phase transitions over the whole voltage range, which facilitates ultrasmall volume variation (0.6%) and fast Na + ion diffusion (10 −9 cm 2 s −1 ) in the electrochemical process. The HEO material therefore shows excellent electrochemical performances with high rate performance (91 mA h g −1 at a current density of 480 mA g −1 ) and high capacity retention in a wide temperature range from −45 to 55 °C (after 100 cycles, the batteries show 80% capacity retention at 55 °C, 87% at room temperature, and 92% at −45 °C). The results described in this work demonstrate a method to inhibit the complicated staircase-like electrochemical profiles induced by either Na + /vacancy ordering or undesirable P−O phase transitions in P2-type oxide cathode materials and a useful strategy for enhancing the electrochemical performance of P2-type cathode materials for all-climate sodium-ion batteries.

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Section: Resultssupporting

confidence: 87%

Section: ■ Introductionmentioning

confidence: 99%

Solid-Solution Reaction and Ultrasmall Volume Change in High-Entropy P2-type Layered Oxide Cathode for All-Climate Sodium-Ion Batteries

Jiang,

Li,

Luo

2024

ACS Sustainable Chem. Eng.

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“…The evolution trend of peak intensity and position of the characteristic peak (001) is emphasized in Figure e. During the cycling process, the (001) peak shifts to the lower 2θ degree and then gradually recovers to the initial state, indicating the reversible intercalation/deintercalation of Na ions occurring during the cycling process . Note that the Fe-PPy 0.39 MnO 2 shows an almost identical XRD pattern with the pristine state after one full discharge–charge cycle, indicating the prominent structure stability without obvious stacking for the Fe-PPy 0.39 MnO 2 intercalation host.…”

Section: Resultsmentioning

confidence: 90%

“…During the cycling process, the (001) peak shifts to the lower 2θ degree and then gradually recovers to the initial state, indicating the reversible intercalation/deintercalation of Na ions occurring during the cycling process. 44 Note that the Fe-PPy 0.39 MnO 2 shows an almost identical XRD pattern with the pristine state after one full discharge−charge cycle, indicating the prominent structure stability without obvious stacking for the Fe-PPy 0.39 MnO 2 intercalation host. In comparison, there is no measurable change in peak intensity and position (Figure 3f, g), suggesting the interfacial cation storage behavior of the bare MnO 2 electrode.…”

Section: Integration Of 2d Nanosheets Into 3d Sandwichedmentioning

confidence: 86%

Sandwiched MnO₂-Fe(CN)₆^4–-Doped PPy-MnO₂ Cathodes with Tunable Interlayer Spaces and Dual Redox Active Sites for Enhanced Na Storage

Wang,

Zhang,

Song

et al. 2024

Ind. Eng. Chem. Res.

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The limited interlayer spacing and irreversible structure transition often lock the practical potential of 2D manganese oxide nanosheets as cathodes for Na secondary batteries. Herein, an effective nondestructively interfacial engineering approach at the atomic-level was proposed to transform the monolayer building blocks into efficient layered Na intercalation materials with tunable physiochemical properties. The 3D layered sandwiched MnO 2 -Fe(CN) 6 4− -doped PPy-MnO 2 superlattice was self-assembled via an electrostatic coprecipitation and layer-by-layer orderly rearrangement of MnO 2 nanosheets with guest unilamellar polymer nanoflakes. As for the redox active Fe(CN) 6 4− -doped PPy interpenetrated MnO 2 architecture, the polymer species served as structural stabilizers to prevent the restacking/aggregating of metal oxide nanosheets and expand the interlayer channels to accommodate fast Na-ion diffusion, effectively enabling barely inactive MnO 2 to reach the highest Na storage capabilities among Naintercalation cathodes. Accordingly, the remarkable specific capacity of 180 mAh g −1 , prominent rate performance, and excellent long-term cycling stability of up to 1000 cycles are obtained for the sandwiched cathode with dual active centers for Na-ion storage. Meanwhile, the proof-of-concept Na-ion pouch cell delivers a high energy of 405 Wh kg −1 and validates the promising practical potential of the designed 3D layered intercalative cathodes.

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Entropy-modulated and interlayer-doped transition metal layered oxides enable high-energy-density sodium-ion capacitors

Wang,

Li,

Chen

et al. 2024

Nano Res.

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Manipulating Na occupation and constructing protective film of P2-Na0.67Ni0.33Mn0.67O2 as long-term cycle stability cathode for sodium-ion batteries

Cited by 14 publications

References 45 publications

Solid-Solution Reaction and Ultrasmall Volume Change in High-Entropy P2-type Layered Oxide Cathode for All-Climate Sodium-Ion Batteries

Solid-Solution Reaction and Ultrasmall Volume Change in High-Entropy P2-type Layered Oxide Cathode for All-Climate Sodium-Ion Batteries

Sandwiched MnO₂-Fe(CN)₆^4–-Doped PPy-MnO₂ Cathodes with Tunable Interlayer Spaces and Dual Redox Active Sites for Enhanced Na Storage

Entropy-modulated and interlayer-doped transition metal layered oxides enable high-energy-density sodium-ion capacitors

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Manipulating Na occupation and constructing protective film of P2-Na0.67Ni0.33Mn0.67O2 as long-term cycle stability cathode for sodium-ion batteries

Cited by 14 publications

References 45 publications

Solid-Solution Reaction and Ultrasmall Volume Change in High-Entropy P2-type Layered Oxide Cathode for All-Climate Sodium-Ion Batteries

Solid-Solution Reaction and Ultrasmall Volume Change in High-Entropy P2-type Layered Oxide Cathode for All-Climate Sodium-Ion Batteries

Sandwiched MnO2-Fe(CN)64–-Doped PPy-MnO2 Cathodes with Tunable Interlayer Spaces and Dual Redox Active Sites for Enhanced Na Storage

Entropy-modulated and interlayer-doped transition metal layered oxides enable high-energy-density sodium-ion capacitors

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Sandwiched MnO₂-Fe(CN)₆^4–-Doped PPy-MnO₂ Cathodes with Tunable Interlayer Spaces and Dual Redox Active Sites for Enhanced Na Storage