High-performance symmetric sodium-ion batteries using a new, bipolar O3-type material, Na0.8Ni0.4Ti0.6O2

Guo, Shaohua; Yu, Haijun; Chen, Mingwei; Ren, Yang; Zhang, Tao; Chen, Ming-Wei; Ishida, M.; Zhou, Haoshen

doi:10.1039/c4ee03361b

Cited by 225 publications

(168 citation statements)

References 64 publications

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“…No research has been done on the Na-ion conduction of the P3 phase as electrode materials until now, partly because the P3 phase is rarely directly synthesized. 27,28 Furthermore, the phase transition and relative electrochemical properties are very dependent on the sodium content; 29,30 therefore, a couple consisting of the P2 and P3 phases having nearly the same compositions is quite essential for conducting this study. Some fundamental issues still need clarification.…”

Section: Introductionmentioning

confidence: 99%

Understanding sodium-ion diffusion in layered P2 and P3 oxides via experiments and first-principles calculations: a bridge between crystal structure and electrochemical performance

et al. 2016

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Layered Na x MeO 2 (Me = transition metal) oxides, the most common electrode materials for sodium-ion batteries, fall into different phases according to their stacking sequences. Although the crystalline phase is well known to largely influence the electrochemical performance of these materials, the structure-property relationship is still not fully experimentally and theoretically understood. Herein, a couple consisting of P2-Na 0.62 Ti 0.37 Cr 0.63 O 2 and P3-Na 0.63 Ti 0.37 Cr 0.63 O 2 materials having nearly the same compositions is reported. The atomic crystal structures and charge compensation mechanism are confirmed by atomic-scale characterizations in the layered P2 and P3 structures, respectively, and notably, the relationship of the crystal structure-electrochemical performance is well defined in the layered P-type structures for the first time in this paper. The electrochemical results suggest that the P2 phase exhibits a better rate capability and cycling stability than the P3 phase. Density functional theory calculations combined with a galvanostatic intermittent titration technique indicates that the P2 phase shows a lower Na diffusion barrier in the presence of multi-Na vacancies, accounting for the better rate capability of the P2 phase. Our results reveal the relationship between the crystal structure and the electrochemical properties in P-type layered sodium oxides, demonstrating the potential for future electrode advancements for applications in sodium-ion batteries. INTRODUCTIONTo smoothly integrate renewable energy into a smart grid system, an inexpensive and efficient energy storage device is urgently needed for large-scale applications. 1 The increasing costs and limited availability of lithium suggest that an alternative to lithium-ion batteries should be developed to meet the demands of large-scale energy storage. [2][3][4][5][6] Rechargeable sodium-ion batteries have chemical storage mechanisms similar to their lithium-ion counterparts and are expected to be low cost and chemically sustainable as a result of an almost infinite supply of sodium. [7][8][9][10][11][12][13][14][15] Meanwhile, the feasible replacement of Cu with Al current collectors (an alloying reaction does not occur between Na and Al) will further reduce the substantial costs and weight for nextgeneration batteries.Layered sodium oxide Na x MeO 2 (Me = 3d transition metal) materials, owing to their large specific capacity and reversible insertion/

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Section: Introductionmentioning

confidence: 99%

Understanding sodium-ion diffusion in layered P2 and P3 oxides via experiments and first-principles calculations: a bridge between crystal structure and electrochemical performance

et al. 2016

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“…[82][83][84] O 2 , which was attributed to the more reversible structure evolution of O3-P3-O3′-O3″, as indicated in Figure 4 d. [ 79,85,86 ] In contrast to the general view that O3-structures are only synthesized in Na-rich environments, recent works have reported the discovery of Na-defi cient O3-type cathodes (i.e., Na 0.8 Ni 0.4 Ti 0.6 O 2 and Na 0.67 Fe 0.67 Mn 0.33 O 2 ) for NIBs, and such works could possibly broaden the strategy for O3 cathode development. [ 31,80,87,88 ] The O3-Na 0.8 Ni 0.4 Ti 0.6 O 2 electrode delivered a reversible capacity of 85 mA h g −1 at 2.8 V vs Na + /Na with a redox reaction of Ni 4+ /Ni 2+ and Ti 4+ /Ti 3+ . [ 87 ] Approximately 75% of the capacity was maintained after 150 cycles, and a good rate capability was observed.…”

Section: O3-type Tmosmentioning

confidence: 99%

Recent Progress in Electrode Materials for Sodium‐Ion Batteries

Kim

Zhang

et al. 2016

Advanced Energy Materials

884

595

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Grid‐scale energy storage systems (ESSs) that can connect to sustainable energy resources have received great attention in an effort to satisfy ever‐growing energy demands. Although recent advances in Li‐ion battery (LIB) technology have increased the energy density to a level applicable to grid‐scale ESSs, the high cost of Li and transition metals have led to a search for lower‐cost battery system alternatives. Based on the abundance and accessibility of Na and its similar electrochemistry to the well‐established LIB technology, Na‐ion batteries (NIBs) have attracted significant attention as an ideal candidate for grid‐scale ESSs. Since research on NIB chemistry resurged in 2010, various positive and negative electrode materials have been synthesized and evaluated for NIBs. Nonetheless, studies on NIB chemistry are still in their infancy compared with LIB technology, and further improvements are required in terms of energy, power density, and electrochemical stability for commercialization. Most recent progress on electrode materials for NIBs, including the discovery of new electrode materials and their Na storage mechanisms, is briefly reviewed. In addition, efforts to enhance the electrochemical properties of NIB electrode materials as well as the challenges and perspectives involving these materials are discussed.

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“…Although excellent cycling performance can be obtained and has reached up to 1000 cycles with 24% capacity loss with the aid of certain techniques, such as the presodiation process, [69,70] the additional process dramatically complicates the battery fabrication process and increases the manufacturing costs, which makes mass practical production impossible. Therefore, the symmetric sodium-ion full-cell system with a sodium storage cathode and nonmetallic sodium anode are far from satisfactory commercialization, so the development of high energy density and long-lifetime active materials is still a great challenge.…”

Section: +mentioning

confidence: 99%

Sodium‐Ion Batteries: From Academic Research to Practical Commercialization

Deng

Luo

Chou

et al. 2017

Advanced Energy Materials

598

356

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Sodium‐ion batteries (SIBs) have been considered as the most promising candidate for large‐scale energy storage system owing to the economic efficiency resulting from abundant sodium resources, superior safety, and similar chemical properties to the commercial lithium‐ion battery. Despite the long period of academic research, how to realize sodium‐ion battery commercialization for market applications is still a great challenge. Thus, from the perspective of future practical application, this review will identify the factors that are restricting commercialization, and evaluate the existing active materials and sodium‐ion‐based full‐cell system. The design and development trends that are needed for SIBs to meet the requirements of practical applications in large‐scale energy storage will also be discussed in detail.

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High-performance symmetric sodium-ion batteries using a new, bipolar O3-type material, Na_0.8Ni_0.4Ti_0.6O₂

Cited by 225 publications

References 64 publications

Understanding sodium-ion diffusion in layered P2 and P3 oxides via experiments and first-principles calculations: a bridge between crystal structure and electrochemical performance

Understanding sodium-ion diffusion in layered P2 and P3 oxides via experiments and first-principles calculations: a bridge between crystal structure and electrochemical performance

Recent Progress in Electrode Materials for Sodium‐Ion Batteries

Sodium‐Ion Batteries: From Academic Research to Practical Commercialization

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