A Water Stable, Near‐Zero‐Strain O3‐Layered Titanium‐Based Anode for Long Cycle Sodium‐Ion Battery

Cao, Yang; Zhang, Qing; Wei, Yaqing; Guo, Yanpeng; Zhang, Zewen; Huang, William; Yang, Kaiwei; Chen, Weihua; Zhai, Tianyou; Li, Huiqiao; Cui, Yi

doi:10.1002/adfm.201907023

Cited by 47 publications

(33 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a recent study on the air stability of the Na-Li-Ti-O system, Li et al proposed the concept of a Na-ion volume occupancy ratio (R n ), which was defined as the volumetric ratio of Na ions to the entire O-Na-O layer, as shown in Figure 13B. 92 The R n number reflects not only the possible lattice vacancy numbers for water to be inserted into the interlayers, but also the influence of lattice parameters. The larger the R n , the greater the air stability.…”

Section: Higher Na-ion Volume Occupancy Ratiosmentioning

confidence: 99%

Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Zhang

Yang

et al. 2022

InfoMat

Self Cite

View full text Add to dashboard Cite

With the development of electrode materials in lithium ion batteries-upgrading from LiCoO 2 and LiFePO 4 to Ni-rich layered oxides, and the shifting of battery systems from high cost lithium ion to low cost sodium ion technology, the air sensitivity of the electrode materials has become an increasingly important issue in both production and application. Furthermore, the air sensitivity of electrode materials must be carefully considered throughout nearly all stages of their life, including material design, synthesis, production, storage, packaging, transportation, and battery assembly. Therefore, a fundamental understanding of the air degradation mechanism of electrode materials and the exploration of new methods to enhance their air stability are of great significance for the development of batteries with better performance. Herein, we provide a review of the issues related to air exposure of electrode materials in Li/Na ion batteries, including factors related to air sensitivity, degradation mechanisms, and recent progress in improving their air stability. The merits and existing challenges of different strategies are presented, and a rational design perspective as well as general principles for evaluating air stability are proposed.

show abstract

Section: Higher Na-ion Volume Occupancy Ratiosmentioning

confidence: 99%

Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Zhang

Yang

et al. 2022

InfoMat

Self Cite

View full text Add to dashboard Cite

show abstract

“…Doping alkali metal sites and the transition metal layer of cathode materials with Li ions can improve the performance of the cathode materials. [26,27] While Li-ions that are introduced into oxide cathodes maintain a single-phase structure, their electrochemical performance is limited. [25] In recent work, the heterostructures of tunnel-layered and P2-O3 intergrown cathode materials have attracted great interest owing to their synergistic effects.…”

Section: Introductionmentioning

confidence: 99%

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Liang

Kim

Jung

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Sodium manganese oxides as promising cathode materials for sodium‐ion batteries (SIBs) have attracted interest owing to their abundant resources and potential low cost. However, their practical application is hindered due to the manganese disproportionation associated with Mn3+, resulting in rapid capacity decline and poor rate capability. Herein, a Li‐substituted, tunnel/spinel heterostructured cathode is successfully synthesized for addressing these limitations. The Li dopant acts as a pillar inhibiting unfavorable multiphase transformation, improving the structural reversibility, and sodium storage performance of the cathode. Meanwhile, the tunnel/spinel heterostructure provides 3D Na+ diffusion channels to effectively enhance the redox reaction kinetics. The optimized [Na0.396Li0.044][Mn0.97Li0.03]O2 composite delivers an excellent rate performance with a reversible capacity of 97.0 mA h g–1 at 15 C, corresponding to 82.5% of the capacity at 0.1 C, and a promising cycling stability over 1200 cycles with remarkable capacity retention of 81.0% at 10 C. Moreover, by combining with hard carbon anodes, the full cell demonstrates a high specific capacity and favorable cyclability. After 200 cycles, the cell provides 105.0 mA h g–1 at 1 C, demonstrating the potential of the cathode for practical applications. This strategy might apply to other sodium‐deficient cathode materials and inform their strategic design.

show abstract

“…The porous structure with thickness of about 150 nm was displayed in the cross‐section scanning electron microscopy (SEM) image of the nanosheet (Figure 2B). The corresponding high‐magnified SEM image (Figure 2C) shows that the porous TiO 2 ‐C nanosheet is composed of intertwined CNT networks that anchor numerous well‐dispersed TiO 2 NPs, which is beneficial to facilitate electron transfer to active materials 16–18 . Meanwhile, abundant pores in the nanosheets can play a nanosized electrolyte reservoir role to allow the fast diffusion of Na‐ions across the whole film electrode 19,20 (Figure 2D).…”

Section: Resultsmentioning

confidence: 99%

Foldable high‐strength electrode enabled by nanosheet subunits for advanced sodium‐ion batteries

Wang

et al. 2021

InfoMat

Self Cite

View full text Add to dashboard Cite

Power sources with strong mechanical properties and high‐energy density are highly desirable for the next‐generation flexible electronics. However, the challenge arises from the current electrode structure design, which is unable to bring both satisfactory mechanical and electrochemical properties with high active materials content and mass. Herein, we reported novel flexible, high‐strength, and mechanically stable TiO2‐based film electrodes for advanced sodium‐ion batteries, achieving an ultrahigh strength (up to ≈60 MPa) and commercial‐level areal capacity (4.5 mAh cm−2). Highly‐dispersed TiO2 and interlaced carbon nanotube (CNT) networks are embedded in the sheet‐liked cellulose to form porous, high‐conductive, and high‐active TiO2‐C nanosheets that is basic building subunits of TiO2‐C films, allowing the films with structural robustness and origami‐level flexibility. This strategy reconciles the contradiction between mechanical properties and active material content in flexible electrodes, and the fabricated electrode with a high TiO2 content of >65% can be bent more than 11 000 times without breaking. Meanwhile, good capacity and excellent cycle stability (0.02‰ capacity‐decay rate over 9000 cycles) of TiO2‐C film under a higher active content (75%) has well satisfied the demands of flexible energy storage devices for electrochemical performances. This TiO2‐C subunit assembly methodology demonstrates enormous potential in high‐strength/toughness flexible electrode construction for flexible electronics.

show abstract

A Water Stable, Near‐Zero‐Strain O3‐Layered Titanium‐Based Anode for Long Cycle Sodium‐Ion Battery

Cited by 47 publications

References 41 publications

Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Air sensitivity of electrode materials in Li/Na ion batteries: Issues and strategies

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Foldable high‐strength electrode enabled by nanosheet subunits for advanced sodium‐ion batteries

Contact Info

Product

Resources

About