Theory-driven designed TiO2@MoO2 heterojunction: Balanced crystallinity and nanostructure toward desirable kinetics and high-rate sodium-ion storage

Yin, Junyi; Hai, Pengqi; Gao, Yuan; Gan, Zihan; Wu, Chao; Cheng, Yonghong; Xu, Xin

doi:10.1007/s12274-022-5120-x

Cited by 10 publications

(4 citation statements)

References 45 publications

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“…Then, the contributions of ion diffusion and capacitance to the charge storage are analyzed using the following eqn (1) i ( v ) = av b where b represents the slope, and when the value of b is 1 means that the capacitance plays a dominant role, while the value of b is 0.5 means the diffusion-controlled charge storage. 30 The values of b shown in Fig. 5(b) are all above 0.6, indicating that the charge storage at the NiO/SnO 2 @NG electrode is mainly controlled by the capacitance.…”

Section: Resultsmentioning

confidence: 87%

Synthesis of heterointerfaces in NiO/SnO₂ coated nitrogen-doped graphene for efficient lithium storage

Yin,

Zhang,

Liu

et al. 2024

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 87%

Synthesis of heterointerfaces in NiO/SnO₂ coated nitrogen-doped graphene for efficient lithium storage

Yin,

Zhang,

Liu

et al. 2024

Phys. Chem. Chem. Phys.

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“…This confirms that the electrochemical behaviors of the MoO 2 @HCNFs and MoO 2 @CNFs are represented by the predominance of the surface capacitive controlled process. To further investigate the pseudocapacitive contribution, Equations (3) and (4) are given [ 38 , 39 ]: i = k 1 v + k 2 v 1/2 i/v 1/2 = k 1 v 1/2 + k 2 where k 1 v is the surface capacitive behaviour and k 2 v 1/2 is the diffusion-controlled behaviour. As shown in Figure 5 c, the pseudocapacitance contribution of the MoO 2 @HCNFs is 75.0% at a scan rate of 1.0 mV s −1 , indicating that the pseudocapacitance behavior accounts for a higher proportion of the overall capacitance.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Stable Structure and Fast Ion Diffusion: A Flexible MoO2@Carbon Hollow Nanofiber Film as a Binder-Free Anode for Sodium-Ion Batteries with Superior Kinetics and Excellent Rate Capability

Feng,

Gao,

Zhong

et al. 2024

Polymers

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Designing innovative anode materials that exhibit excellent ion diffusion kinetics, enhanced structural stability, and superior electrical conductivity is imperative for advancing the rapid charge–discharge performance and widespread application of sodium-ion batteries. Hollow-structured materials have received significant attention in electrode design due to their rapid ion diffusion kinetics. Building upon this, we present a high-performance, free-standing MoO2@hollow carbon nanofiber (MoO2@HCNF) electrode, fabricated through facile coaxial electrospinning and subsequent heat treatment. In comparison to MoO2@carbon nanofibers (MoO2@CNFs), the MoO2@HCNF electrode demonstrates superior rate capability, attributed to its larger specific surface area, its higher pseudocapacitance contribution, and the enhanced diffusion kinetics of sodium ions. The discharge capacities of the MoO2@HCNF (MoO2@CNF) electrode at current densities of 0.1, 0.2, 0.5, 1.0, 2.0 and 5.0 A g−1 are 195.55 (155.49), 180.98 (135.20), 163.81 (109.71), 144.05 (90.46), 121.16 (71.21) and 88.90 (44.68) mAh g−1, respectively. Additionally, the diffusion coefficients of sodium ions in the MoO2@HCNFs are 8.74 × 10−12 to 1.37 × 10−12 cm2 s−1, which surpass those of the MoO2@CNFs (6.49 × 10−12 to 9.30 × 10−13 cm2 s−1) during the discharging process. In addition, these prepared electrode materials exhibit outstanding flexibility, which is crucial to the power storage industry and smart wearable devices.

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“…Compared to MY−LCO and MY@P−LCO, LCO exhibited increased polarization after 50 cycles, undoubtedly affecting the electrochemical reaction kinetics. Subsequently, we calculated the D Li + values for the three materials during discharge using eq S4, 56 as displayed in Figure 5d−f. We observed that after the first cycle, the D Li + values for the three samples were similar.…”

Section: Resultsmentioning

confidence: 99%

A Dual-Functional Synergetic Strategy Enhances the Interfacial and Structural Stability of LiCoO₂ at High Voltage

Sun,

Yang,

Shi

et al. 2024

ACS Appl. Energy Mater.

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With the advent of the 5G era, the widespread application of various smart devices and cutting-edge technologies has imposed stringent requirements on the battery lifespan and durability. This study proposes a synergistic modification strategy combining Mg 2+ and Y 3+ dual doping with Li 3 PO 4 coating. Herein, Mg 2+ exhibits a gradient distribution near the surface and a uniform distribution inside, enhancing electronic conductivity while facilitating the penetration of the Y element into the particle interior. What is more, the addition of Y 3+ significantly widens the Li + transmission channels, greatly enhancing the rapid charge− discharge performance. The synergistic interaction of Mg 2+ and Y 3+ stabilizes the internal structure, while the Li 3 PO 4 coating serves to effectively block a direct interaction between the electrolyte and the cathode surface, stabilizing the surface structure and improving the long-term cycling performance. The findings indicate that the synergistic approach adjusts the Co 3d and O 2p energy bands, effectively suppressing the hybridization phenomenon of Co and O orbitals. Remarkably, the proposed strategy maintains a superb capacity retention rate of nearly 80% after 300 cycles at 4.6 V, and it exhibits an excellent reversible capacity of 109.6 mAh• g −1 even at 10 C, thus demonstrating the superior overall performance and vast application potential of this approach.

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Theory-driven designed TiO2@MoO2 heterojunction: Balanced crystallinity and nanostructure toward desirable kinetics and high-rate sodium-ion storage

Cited by 10 publications

References 45 publications

Synthesis of heterointerfaces in NiO/SnO₂ coated nitrogen-doped graphene for efficient lithium storage

Synthesis of heterointerfaces in NiO/SnO₂ coated nitrogen-doped graphene for efficient lithium storage

Stable Structure and Fast Ion Diffusion: A Flexible MoO2@Carbon Hollow Nanofiber Film as a Binder-Free Anode for Sodium-Ion Batteries with Superior Kinetics and Excellent Rate Capability

A Dual-Functional Synergetic Strategy Enhances the Interfacial and Structural Stability of LiCoO₂ at High Voltage

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Theory-driven designed TiO2@MoO2 heterojunction: Balanced crystallinity and nanostructure toward desirable kinetics and high-rate sodium-ion storage

Cited by 10 publications

References 45 publications

Synthesis of heterointerfaces in NiO/SnO2 coated nitrogen-doped graphene for efficient lithium storage

Synthesis of heterointerfaces in NiO/SnO2 coated nitrogen-doped graphene for efficient lithium storage

Stable Structure and Fast Ion Diffusion: A Flexible MoO2@Carbon Hollow Nanofiber Film as a Binder-Free Anode for Sodium-Ion Batteries with Superior Kinetics and Excellent Rate Capability

A Dual-Functional Synergetic Strategy Enhances the Interfacial and Structural Stability of LiCoO2 at High Voltage

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Product

Resources

About

Synthesis of heterointerfaces in NiO/SnO₂ coated nitrogen-doped graphene for efficient lithium storage

Synthesis of heterointerfaces in NiO/SnO₂ coated nitrogen-doped graphene for efficient lithium storage

A Dual-Functional Synergetic Strategy Enhances the Interfacial and Structural Stability of LiCoO₂ at High Voltage