Regulating the local chemical environment in layered O3-NaNi0.5Mn0.5O2 achieves practicable cathode for sodium-ion batteries

Peng, Bo; Chen, Yanxu; Zhao, Liping; Zeng, Suyuan; Wan, Guanglin; Wang, Rui; Zhang, Xiaolei; Wang, Wentao; Zhang, Genqiang

doi:10.1016/j.ensm.2023.02.001

Cited by 51 publications

(18 citation statements)

References 53 publications

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“…The Ragone plot, depicting the relationship between energy density and power density, was constructed based on the rate performance data and calculated using the combined mass of the active cathode and anode electrode materials, as exhibited in Figure e, where the NCO-AC//HC full cell can deliver energy densities of 211.0, 205.3, 201.4, 192.5, 171.3, and 99.8 Wh kg –1 at power densities of 21.6, 40.1, 103.2, 200.7, 388.6, and 869.4 W kg –1 . The energy and power density of the full-cell device in this study demonstrate competitive performance when compared to recently reported values (Figure e). ,− As depicted in Figure f, this full-cell device also delivers a slow voltage decay with increased power density. Specifically, it shows decent working voltages of 2.99, 2.92, 2.87, 2.79, 2.70, and 2.42 V at power densities of 21.6, 40.1, 103.2, 200.7, 388.6, and 869.4 W kg –1 .…”

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confidence: 51%

Crystal Facet Design in Layered Oxide Cathode Enables Low-Temperature Sodium-Ion Batteries

Peng

Zhou

et al. 2023

ACS Materials Lett.

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Layered transition metal oxides (LTMOs) have been identified as promising cathodes for alkali metal-ion batteries. However, their low-temperature performance is generally restricted by the sluggish ion diffusion kinetics within the LTMOs' host. Nanostructured materials have been developed to enhance ion diffusion kinetics but often significantly reduce the tap density. Herein, using NaCrO 2 as a model cathode material, from the aspect of crystallography, we report a large-sized monocrystalline NaCrO 2 with abundant Na + active facets exposed by a straightforward acetate-assisted solid-state reaction, which addresses the dilemma between the volumetric energy density and ion diffusion kinetics and enables excellent lowtemperature performance. Specifically, the synthesized NaCrO 2 cathode showcases a high specific capacity of 94.7 mAh g −1 at a high rate of 20C under room temperature and displays good capacity retention of 97.2% after 100 cycles at 1C under −20 °C. Additionally, the full-cell device demonstrates a remarkable initial capacity of 113.0 mAh g −1 at a rate of 0.1C and exhibits excellent cyclic performance, retaining 84.2% of its capacity after 100 cycles at 0.2C under −10 °C. This study opens up new possibilities to design LTMOs with improved ion diffusion kinetics for alkali metalion batteries.

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confidence: 51%

Crystal Facet Design in Layered Oxide Cathode Enables Low-Temperature Sodium-Ion Batteries

Peng

Zhou

et al. 2023

ACS Materials Lett.

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“…10−16 Considering the coordination of the Na-ions [i.e., octahedral (O) or prismatic (P)] and the number of the O-ion layer or TMO 6 layer in a one-unit cell (typically, 1−3), Na x TMO 2 cathode materials are categorized into P2, P3, O2, and O3 phases. 10,13,17,18 P2-type and O3-type layered oxides are better suited to functioning as cathode materials for SIBs. The P2-type structure offers a distinct advantage by enabling facile Na transport through direct crossover between "open" prismatic sites, whereas the O3-type structure necessitates Naions to pass through intermediate tetrahedral sites while transitioning from one octahedral site to another.…”

Section: Introductionmentioning

confidence: 99%

“…Sodium ion batteries (SIBs) have been regarded as a prospective alternative to lithium-ion batteries (LIBs) owing to the merits of sodium abundance in the Earth’s crust and the low price of sodium resources. − Exploiting long-life cathode materials with superior reliability plays an utmost role in the commercial application of SIBs. Among most candidates, layered oxides Na x TMO 2 (TM represents transition metals) have gained considerable attention due to high theoretical specific capacity, feasible synthesis, and environmental benignity. − Considering the coordination of the Na-ions [i.e., octahedral (O) or prismatic (P)] and the number of the O-ion layer or TMO 6 layer in a one-unit cell (typically, 1–3), Na x TMO 2 cathode materials are categorized into P2, P3, O2, and O3 phases. ,,, P2-type and O3-type layered oxides are better suited to functioning as cathode materials for SIBs. The P2-type structure offers a distinct advantage by enabling facile Na transport through direct crossover between “open” prismatic sites, whereas the O3-type structure necessitates Na-ions to pass through intermediate tetrahedral sites while transitioning from one octahedral site to another.…”

Section: Introductionmentioning

confidence: 99%

Boosting the Ultrastable High-Na-Content P2-type Layered Cathode Materials with Zero-Strain Cation Storage via a Lithium Dual-Site Substitution Approach

Yang,

Wang,

et al. 2023

ACS Nano

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P2-type layered transition-metal (TM) oxides, Na x TMO2, are highly promising as cathode materials for sodium-ion batteries (SIBs) due to their excellent rate capability and affordability. However, P2-type Na x TMO2 is afflicted by issues such as Na+/vacancy ordering and multiple phase transitions during Na-extraction/insertion, leading to staircase-like voltage profiles. In this study, we employ a combination of high Na content and Li dual-site substitution strategies to enhance the structural stability of a P2-type layered oxide (Na0.80Li0.024[Li0.065Ni0.22Mn0.66]O2). The experimental results reveal that these approaches facilitate the oxidation of Mn ions to a higher valence state, thereby affecting the local environment of both TM and Na ions. The resulting modification in the local structure significantly improves the Na-ion storage capabilities as required for cathode materials in SIBs. Furthermore, it induces a solid-solution reaction and enables nearly zero-strain operation (ΔV = 0.7%) in the Na0.80Li0.024[Li0.065Ni0.22Mn0.66]O2 cathode during cycling. The assembled full cells demonstrate an exceptional rate performance, with a retention rate of 87% at 10 C compared to that of 0.1 C, as well as an ultrastable cycling capability, maintaining a capacity retention of 73% at 2 C after 1000 cycles. These findings offer valuable insights into the electronic and structural chemistry of ultrastable cathode materials with “zero-strain” Na-ion storage.

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“…Finally, the doped cathode exhibits enhanced cyclic performance with a capacity retention of 92.8% after 200 cycles at 1 C. Very recently, Peng et al. [ 53 ] verifies that Al 3+ doping can promote the sodium ion diffusion rate and structural stability of O3‐NaNi 0.5 Mn 0.5 O 2 by theoretical calculation and experimental characterization. More importantly, they found that the Na + diffusion kinetics and phase transitions can be predicted by the DFT calculation, which could well guide the modification design for layered oxide cathodes.…”

Section: Ion Dopingmentioning

confidence: 96%

Recent Progress in the Emerging Modification Strategies for Layered Oxide Cathodes toward Practicable Sodium Ion Batteries

Peng

Wan

Ahmad

et al. 2023

Advanced Energy Materials

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Low‐cost sodium‐ion batteries (SIBs) have been extensively considered as a supplement or even a replacement for successful lithium‐ion batteries. However, the practical application of SIBs is limited by their energy density and cyclic performance, which are mainly constrained by the cathode side. Therefore, the development of advanced cathode materials is essential for the practical application of SIBs. Among the various cathode materials, layered transition metal oxides (LTMOs) are highly promising candidates due to their compact crystal structure, low‐cost, ease of preparation, and similarities to successful Li‐based LTMOs. Unfortunately, the bottleneck issues faced by Na‐based LTMOs, such as severe phase transitions, sluggish diffusion kinetics, and interface deterioration, pose significant challenges in achieving high‐performance cathodes. In this review, a comprehensive overview and summary of recently reported modification strategies for layered oxides are provided and the structure–function–performance relationship is refined. A perspective on the outlook and development direction for Na‐based LTMOs cathodes is also provided. This review comprehensively explores the modification strategies of Na‐based LTMOs, providing a new horizon for future research on Na‐based LTMOs.

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Regulating the local chemical environment in layered O3-NaNi0.5Mn0.5O2 achieves practicable cathode for sodium-ion batteries

Cited by 51 publications

References 53 publications

Crystal Facet Design in Layered Oxide Cathode Enables Low-Temperature Sodium-Ion Batteries

Crystal Facet Design in Layered Oxide Cathode Enables Low-Temperature Sodium-Ion Batteries

Boosting the Ultrastable High-Na-Content P2-type Layered Cathode Materials with Zero-Strain Cation Storage via a Lithium Dual-Site Substitution Approach

Recent Progress in the Emerging Modification Strategies for Layered Oxide Cathodes toward Practicable Sodium Ion Batteries

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