Suppressing the irreversible phase transition from P2 to O2 in sodium-layered cathode via integrating P2- and O3-type structures

Zhai, Jingjun; Ji, Haocheng; Ji, Wenxin; Wang, Rui; Huang, Zhongyuan; Yang, Tingting; Wang, Chaoqi; Zhang, Taolve; Chen, Ziwei; Zhao, Wenguang; Tayal, Akhil; Jin, Lei; Wang, Jun; Xiao, Yinguo

doi:10.1016/j.mtener.2022.101106

Cited by 15 publications

(13 citation statements)

References 43 publications

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“…This process is repeated until the charge reaches 4.5 V. The discharge process is reversed from the charge. The sodium ion diffusion coefficient is calculated based on GITT . According to the simplified eq , the calculated D Na+ is shown in Figures S9e and S10e. D normalN normala + = 4 π τ true( m B V M M B A true) 2 true( normalΔ E s normalΔ E τ true) 2 ( τ ≤ L 2 / D N a + ) where τ (s) is the time to apply the current pulse, m B (g) is the mass of the electrode material, M B (g mol –1 ) is the atomic weight, V M (cm 3 mol –1 ) is the molar volume of the electrode material, A (cm 2 ) is the electrode area, L (cm) is the electrode thickness, Δ E s is the instantaneous potential change during relaxation, and Δ E τ is the instantaneous voltage change when a current pulse is applied.…”

Section: Resultsmentioning

confidence: 99%

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Using Highly Electronegative Zn to Regulate the Superlattice Structure for the Na-Ion Layered Oxide Cathode with Superior Electrochemical Performance

Fang,

Feng,

et al. 2023

ACS Appl. Mater. Interfaces

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Section: Resultsmentioning

confidence: 99%

“…The sodium ion diffusion coefficient is calculated based on GITT. 46 According to the simplified eq 1, the calculated D Na+ is shown in Figures S9e and S10e.…”

Section: Resultsmentioning

confidence: 99%

Using Highly Electronegative Zn to Regulate the Superlattice Structure for the Na-Ion Layered Oxide Cathode with Superior Electrochemical Performance

Fang,

Feng,

et al. 2023

ACS Appl. Mater. Interfaces

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“…[ 230 ] Hence, Ti with low cationic potential was introduced (Na 0.7 Ni 0.4 Mn 0.4 Ti 0.2 O 2 ) to trigger the formation of an O3 structure and adjust its proportion in the biphasic cathode. [ 231 ] Benefiting from the suppressed high‐voltage phase transition and reduced lattice parameter changes, the developed heterostructured cathode exhibited improved structural integrity and excellent cycling stability (with a capacity retention of 80% after 100 cycles at 1 C and a reversible capacity of 193 mA h g −1 at 0.1 C within 2.0–4.3 V). Moreover, an interfacial interlocking reaction mechanism was proposed to explain the excellent Na‐ion storage performance of heterostructured cathodes, whereby the mutual anchoring of different crystal domains reduces the strain energy and mechanical damage at the phase boundary (Figure 9e).…”

Section: O3‐tye Layered Oxide Cathodesmentioning

confidence: 99%

Practical Cathodes for Sodium‐Ion Batteries: Who Will Take The Crown?

Liang,

Hwang,

Sun

2023

Advanced Energy Materials

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In recent decades, sodium‐ion batteries (SIBs) have received increasing attention because they offer cost and safety advantages and avoid the challenges related to limited lithium/cobalt/nickel resources and environmental pollution. Because the sodium storage performance and production cost of SIBs are dominated by the cathode performance, developing cathode materials with large‐scale production capacity is the key to achieving commercial applications of SIBs. Therefore, developing host materials with high energy density, long cycling life, low production cost, and high chemical/environmental stability is crucial for implementing advanced SIBs. Among the developed cathode materials for SIBs, O3‐type sodiated transition‐metal oxides have attracted extensive attention owing to their simple synthesis methods, high theoretical specific capacity, and sufficient Na content. However, the relatively large Na‐ion radius leads to sluggish diffusion kinetics and inevitable complex phase transitions during the deintercalation/intercalation process, resulting in poor rate capability and cycling stability. Therefore, this review comprehensively summarizes the research progress and modification strategies for O3‐type cathodes, including the component design, surface modification, and optimization of synthesis methods. This work aims to guide the development of commercial layered oxides and provide technical support for the next generation of energy‐storage systems.

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“…The capacity remains stable albeit lower than is observed in the biotemplated P3 sample. One reason for the apparent lack of P3↔O3 transition in solid state P3-NMMO could be the presence of an impurity phase within the cathode, akin to the use of biphasic intergrowth structures to suppress P2↔O2 [55] or P2↔OP4 [56] transitions.…”

Section: Electrochemistrymentioning

confidence: 99%

A comparative study of the effect of synthesis method on the formation of P2- and P3-Na_0.67Mn_0.9Mg_0.1O₂ cathodes

Wilson

Reeves‐McLaren

Boston

2023

Mater. Res. Express

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Na-ion batteries offer a way to develop large-scale energy storage necessary for the adoption of more renewable energy sources. Layered transition metal oxide materials for electrodes can be synthesised using abundant and non-toxic materials, decreasing costs and risks compared to lithium-ion batteries. Solid state processing is commonly used for synthesis, using long calcinations at high temperatures (>800 °C). Other synthetic routes, such as biotemplating, offer the opportunity to reduce reaction temperatures and times, and can enable access to different polymorphs. Here, we compare the properties of Na0.67Mn0.9Mg0.1O2 synthesised by both solid state and biotemplating, producing both P2 and P3 polymorphs to understand the differences which arise as a result of synthesis and temperature choice. We show that biotemplated P3-Na0.67Mn0.9Mg0.1O2 offers increased discharge capacity over the more commonly reported P2 phase for 50 cycles at C/5, 103 mAh g-1 for biotemplated P3-NMMO. Furthermore, the biotemplating samples demonstrate improved capacity after 50 cycles at C/5, and higher capacity delivered at 5C in both P2 and P3 phases over conventional solid state synthesis.

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Suppressing the irreversible phase transition from P2 to O2 in sodium-layered cathode via integrating P2- and O3-type structures

Cited by 15 publications

References 43 publications

Using Highly Electronegative Zn to Regulate the Superlattice Structure for the Na-Ion Layered Oxide Cathode with Superior Electrochemical Performance

Using Highly Electronegative Zn to Regulate the Superlattice Structure for the Na-Ion Layered Oxide Cathode with Superior Electrochemical Performance

Practical Cathodes for Sodium‐Ion Batteries: Who Will Take The Crown?

A comparative study of the effect of synthesis method on the formation of P2- and P3-Na_0.67Mn_0.9Mg_0.1O₂ cathodes

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Suppressing the irreversible phase transition from P2 to O2 in sodium-layered cathode via integrating P2- and O3-type structures

Cited by 15 publications

References 43 publications

Using Highly Electronegative Zn to Regulate the Superlattice Structure for the Na-Ion Layered Oxide Cathode with Superior Electrochemical Performance

Using Highly Electronegative Zn to Regulate the Superlattice Structure for the Na-Ion Layered Oxide Cathode with Superior Electrochemical Performance

Practical Cathodes for Sodium‐Ion Batteries: Who Will Take The Crown?

A comparative study of the effect of synthesis method on the formation of P2- and P3-Na0.67Mn0.9Mg0.1O2 cathodes

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Product

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A comparative study of the effect of synthesis method on the formation of P2- and P3-Na_0.67Mn_0.9Mg_0.1O₂ cathodes