Anionic Redox Reaction-Induced High-Capacity and Low-Strain Cathode with Suppressed Phase Transition

Rong, Xiaohui; Hu, Enyuan; Lu, Yaxiang; Meng, Fanqi; Zhao, Chenglong; Wang, Xuelong; Zhang, Qinghua; Yu, Xiqian; Gu, Lin; Hu, Yong‐Sheng; Li, Hong; Huang, Xuejie; Yang, Xiao‐Qing; Delmas, Claude; Chen, Liquan

doi:10.1016/j.joule.2018.10.022

Cited by 272 publications

(246 citation statements)

References 36 publications

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“…In order to maintain stable electrochemical performance, great efforts have been made toward improving the long‐term structural integrity of Na 2/3 MnO 2 through ionic doping technique 19–27. For example, Hu and co‐workers reported a P2‐type Na 0.72 [Li 0.24 Mn 0.76 ]O 2 , which demonstrates a considerable reversible capacity and a very low volume change of 3.34% during cycles 28. To proceed a further step forward, it is much desirable to completely eliminate the unexpected phase transitions (especially the P2–O2 phase transition) so as to significantly reduce the mechanical strain of the host Na x MnO 2 materials.…”

Section: Introductionmentioning

confidence: 99%

Ultralow‐Strain Zn‐Substituted Layered Oxide Cathode with Suppressed P2–O2 Transition for Stable Sodium Ion Storage

Wang

Zhu

et al. 2020

Adv Funct Materials

116

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Layered transition metal oxides have drawn much attention as a promising candidate cathode material for sodium‐ion batteries. However, their performance degradation originating from strains and lattice phase transitions remains a critical challenge. Herein, a high‐concentration Zn‐substituted NaxMnO2 cathode with strongly suppressed P2–O2 transition is investigated, which exhibits a volume change as low as 1.0% in the charge/discharge process. Such ultralow strain characteristics ensure a stable host for sodium ion storage, which significantly improves the cycling stability and rate capability of the cathode material. Also, the strong coupling between the highly reversible capacity and the doping content of Zn in NaxMnO2 is investigated. It is suggested that a reversible anionic redox reaction can be effectively triggered by Zn ions and is also highly dependent on the Zn content. Such an ion doping strategy could shed light on the design and construction of stable and high‐capacity sodium ion host.

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Section: Introductionmentioning

confidence: 99%

Ultralow‐Strain Zn‐Substituted Layered Oxide Cathode with Suppressed P2–O2 Transition for Stable Sodium Ion Storage

Wang

Zhu

et al. 2020

Adv Funct Materials

116

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“…Among which layered oxide materials are considered to be one of the most promising candidates for the practical large‐scale applications owing to the high structural compatibility for reversible Na + ‐(de)intercalation chemistry . To tailor the high Na‐storage performance, a large number of elements, such as Li, Mg, Al, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ru, Sn, Sb, Te, Ir, Bi, and even vacancies, have been investigated to substitute/dope transition metal (TM) sites in Na x TMO 2 system, having one or multiple components in different oxidation states. Up to now, several representative materials along with different electrochemical performance, for example, Mn‐based (Na x MnO 2 , P2‐Na 2/3 Fe 1/2 Mn 1/2 O 2 ) and Ni‐rich (O3‐Na[NiFeMn]O 2 , O3‐Na[NiCoMn]O 2 ) oxides; low‐cost Cu‐based (O3‐Na 0.90 Cu 0.22 Fe 0.30 Mn 0.48 O 2 ) and high‐voltage Ni‐based P2‐Na 2/3 Ni 2/3 Te 1/3 O 2 , have been prepared consecutively.…”

Section: Figurementioning

confidence: 99%

High‐Entropy Layered Oxide Cathodes for Sodium‐Ion Batteries

et al. 2019

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Material innovation on high‐performance Na‐ion cathodes and the corresponding understanding of structural chemistry still remain a challenge. Herein, we report a new concept of high‐entropy strategy to design layered oxide cathodes for Na‐ion batteries. An example of layered O3‐type NaNi0.12Cu0.12Mg0.12Fe0.15Co0.15Mn0.1Ti0.1Sn0.1Sb0.04O2 has been demonstrated, which exhibits the longer cycling stability (ca. 83 % of capacity retention after 500 cycles) and the outstanding rate capability (ca. 80 % of capacity retention at the rate of 5.0 C). A highly reversible phase‐transition behavior between O3 and P3 structures occurs during the charge‐discharge process, and importantly, this behavior is delayed with more than 60 % of the total capacity being stored in O3‐type region. Possible mechanism can be attributed to the multiple transition‐metal components in this high‐entropy material which can accommodate the changes of local interactions during Na+ (de)intercalation. This strategy opens new insights into the development of advanced cathode materials.

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“…was reported with anionic redox reaction of O anions and Mn 3+ /Mn 4+ redox, delivers the highest energy density (700 Wh kg -1 , 270 mAh g -1 ) among all Na cathode materials. 9 However, the widely-studied redox of O anions is likely difficult to break through the bottleneck for practicability, which are mainly voltage hysteresis (low energy efficiency) and sluggish kinetics (low rate capability). 4,10 While, layered chalcogenides may be the substitution of oxides.…”

Section: Introductionmentioning

confidence: 99%

Reversible Dual Anionic-Redox Chemistry in NaCrSSe with Fast Charging Capability

Shi

Shadike

Yang

et al. 2020

Preprint

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Utilizing the anionic redox reaction opens new approaches for the development of new battery cathode materials with extra capacities. Although, it suffers from several obstacles such as voltage hysteresis and sluggish kinetics. In this paper, a new layered chalcogenide-based on dual anionic-redox reaction is reported. The newly designed layered NaCrSSe exhibits the capacity of almost all Na+ intercalation/deintercalation (137 mAh g-1 at 50 mA g-1), and a unique charge/discharge feature with a small polarization of 0.15 V and high energy efficiencies of ~92% in initial cycles. Furthermore, a superior high-rate charge capacity of 115.5mAh g-1 (83.7% retention) was achieved at 27.8 C (4000 mA g-1), which is impressive in all bulk materials for sodium-ion batteries. Systematic characterization studies on structure evolution and DFT calculation show the charge compensation of S and Se anions during cycling. These results will enrich the anion redox chemistry and provide valuable information for developing new anion redox based cathode materials with high capacity and fast kinetics.

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Anionic Redox Reaction-Induced High-Capacity and Low-Strain Cathode with Suppressed Phase Transition

Cited by 272 publications

References 36 publications

Ultralow‐Strain Zn‐Substituted Layered Oxide Cathode with Suppressed P2–O2 Transition for Stable Sodium Ion Storage

Ultralow‐Strain Zn‐Substituted Layered Oxide Cathode with Suppressed P2–O2 Transition for Stable Sodium Ion Storage

High‐Entropy Layered Oxide Cathodes for Sodium‐Ion Batteries

Reversible Dual Anionic-Redox Chemistry in NaCrSSe with Fast Charging Capability

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