Stable layered P3/P2 Na0.66Co0.5Mn0.5O2 cathode materials for sodium-ion batteries

Chen, Xiaoqing; Zhou, Zhen; Hu, Meng; Liang, Jing; Wu, Dihua; Wei, Jinping

doi:10.1039/c5ta05205j

Cited by 162 publications

(135 citation statements)

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“…Even at 20 C and 30 C, the reversible discharge capacity still reached 75.6 mAh g -1 and 68.4 mAh g -1 after 150 cycles and the corresponding capacity retention was about 82.3% and 78%, respectively, which are better than those in our previous report. 7 Note that the high coulombic efficiency is considered as an important character for practical applications. The coulombic efficiency of the electrodes at 10 C was approximately 98% besides the initial two cycles, which could illustrate that NCM55 is suitable to serve as the cathode material for practical SIBs.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, sodium shares similar physical/chemical properties in many aspects to lithium since it is located below lithium at the main group in the periodic table. 7 In the past several years, numerous efforts have been made to hunt for cathode materials to ameliorate the electrochemical performance of SIBs. Layered oxides, polyanion compounds, and other electrode materials have been proverbially studied.…”

Section: Introductionmentioning

confidence: 99%

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A P2-Na_0.67Co_0.5Mn_0.5O₂ cathode material with excellent rate capability and cycling stability for sodium ion batteries

Zhu¹,

Chen³

et al. 2016

J. Mater. Chem. A

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148

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Sodium ion batteries are considered as next-generation energy storage devices; however, stable cathode materials are highly desired and challenging for sodium ion batteries. Herein, we report the preparation of a layered cathode material, P2-Na0.67Co0.5Mn0.5O2, with hierarchical architectures, through a facile and simple sol-gel route. X-ray diffraction (XRD) and high resolution transmission electron microscope elucidated a well-defined P2-type phase structure, and in-situ XRD measurements provided further evidence about the structural stability during desodiation/sodiation. Benefiting from the structural stability, the cathode material delivered a high discharge capacity of 147 mAh g -1 at 0.1 C rate, and excellent cyclic stability with nearly 100% capacity retention over at least 100 cycles at 1 C. More importantly, 88 mAh g -1 was maintained when the electrode was cycled at a very high rate of 30 C, and almost half of its capacity retained over 2000 cycles, which outperform all the reported P2-type cathode materials. With outstanding electrochemical performance and structural flexibility, the P2-Na0.67Co0.5Mn0.5O2 cathode material will promote the practical applications of sodium ion batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A P2-Na_0.67Co_0.5Mn_0.5O₂ cathode material with excellent rate capability and cycling stability for sodium ion batteries

Zhu¹,

Chen³

et al. 2016

J. Mater. Chem. A

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148

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“…[ 90 ] These authors revealed that Ni-substituted P2-Na 0. 67 2 , which displays superior structural stability in water. The enhanced stability was demonstrated by the small change in the XRD patterns; however, the mechanism is not yet clear.…”

Section: O3-type Tmosmentioning

confidence: 99%

Recent Progress in Electrode Materials for Sodium‐Ion Batteries

Kim

Zhang

et al. 2016

Advanced Energy Materials

850

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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“…Na 3 V 1.95 Mg 0.05 (PO 4 ) 3 /C exhibited the best electrochemical performance in terms of the rate capability (112.5 mA h g −1 at 1C to 94.2 mA h g −1 at 30C) and cycle performance (81% capacity retention at 20C over 50 cycles), attributed to the enhanced structural stability, and the ionic and electronic conductivity by Mg doping. [93] A similar example is demonstrated by a solgel-method-induced Na 3 V 2−x Mn x (PO 4 ) 3 /C (0 < x < 0.7). An optimized performance is obtained for Na 3 V 1.7 Mn 0.3 (PO 4 ) 3 /C with a high capacity of 104 mA h g −1 at 0.5C between 2.0 and 4.3 V. [140] …”

Section: Nasicon Na 3 V 2 (Po 4 )mentioning

confidence: 74%

“…[92] In addition to the above elemental strategies, nanoscale interface engineering is an effective tool to enhance the cathode performance. [93,94] A novel P2-O3 Na 0. 66 , good rate capability (134 mA h g −1 at 1C), and good cycling stability (84% retention after 50 cycles at 0.2C), as well as a largest energy density of approximately 640 W h kg −1 with 3.2 V for SIBs.…”

Section: Mixed-cation Oxidesmentioning

confidence: 99%

Advanced Cathode Materials for Sodium‐Ion Batteries: What Determines Our Choices?

et al. 2017

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lithium with cheaper alternatives might make future batteries less susceptible to price fluctuations when the market expands. [5] This concern has in turn spawned a flurry of research activity to look beyond LIB technology. In view of the various rechargeable batteries, sodiumion batteries (SIBs) that consist of a main element of seawater made their presence felt in the battery industry due to their chemical similarity (e.g., only 0.3 V more positive than lithium) but higher abundance compared to lithium, [6] as illustrated in Table 1. SIBs work in the same way as LIBs in that they involve the reversible migration of cations/anions across a separator toward the electrodes to realize voltage-driven electrochemical reactions. [7] The upward trend for sodium-ion battery research is driven by the concern over the scarcity and price rise of lithium. Hence, these major merits, as well as the suitable redox potential (E = 0.3 V vs Li) make the SIB an appropriate choice as a rechargeable battery system.In fact, SIBs started almost in parallel with LIBs in the 1980s but the development of LIBs eventually eclipsed SIBs due to the electrochemical performances of SIBs. [8,9] A major obstacle is that it is difficult to get a sodium host material with comparable operating voltage and capacity as the LIB analogs. Firstly, the larger Na + radius (0.98 Å) than that of Li + (0.69 Å) leads to the kinetically sluggish Na + insertion/extraction and transport cross the host-material framework, which will always make the specific capacity and rate capacity largely degraded. [10] Secondly, the larger volume expansion caused by Na + insertion will also bring a change in the phase and lattice of the host materials, making it difficult to achieve a favorable electrochemical stability compared with the LIB counterparts. [11] In addition, they also suffer from a lower specific energy than LIBs, due to the lower potential and larger atomic weight of sodium. It is still a challenge to build an affordable Na-host materials endowed with a high specific energy (e.g., 500 W h kg −1 in LIBs). [12] Recently, the topic of SIBs was revisited in the hope of exploring possible ways to overcome the concerns about the low energy density and poor cycling life of SIBs.In spite of the above distinct drawbacks, SIBs can actually behave slightly differently in some chemical aspects. For instance, sodium does not react with aluminum, which is contrary to the alloying tendency of lithium. In the commercial market, manufacturers could appreciate this "inertness" to reduce the production cost of batteries by substituting the Among the various energy solutions, lithium-ion batteries (LIBs) play an important role in the process of the transition from fossil fuels to renewables. However, the necessity to replace lithium with cheaper alternatives due to its scarcity has recently attracted great interest to developing sodium-ion batteries (SIBs). Hence, the discovery and development of suitable cathode materials that exhibit high specific capacity, good cycling stabil...

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Stable layered P3/P2 Na_0.66Co_0.5Mn_0.5O₂ cathode materials for sodium-ion batteries

Abstract: This study presents P3/P2-type biphasic layered Na0.66Co0.5Mn0.5O2 by integrating P2 into P3-layered materials, which delivered outstanding electrochemical performance.

Cited by 162 publications

References 41 publications

A P2-Na_0.67Co_0.5Mn_0.5O₂ cathode material with excellent rate capability and cycling stability for sodium ion batteries

A P2-Na_0.67Co_0.5Mn_0.5O₂ cathode material with excellent rate capability and cycling stability for sodium ion batteries

Recent Progress in Electrode Materials for Sodium‐Ion Batteries

Advanced Cathode Materials for Sodium‐Ion Batteries: What Determines Our Choices?

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Stable layered P3/P2 Na0.66Co0.5Mn0.5O2 cathode materials for sodium-ion batteries

Abstract: This study presents P3/P2-type biphasic layered Na0.66Co0.5Mn0.5O2 by integrating P2 into P3-layered materials, which delivered outstanding electrochemical performance.

Cited by 162 publications

References 41 publications

A P2-Na0.67Co0.5Mn0.5O2 cathode material with excellent rate capability and cycling stability for sodium ion batteries

A P2-Na0.67Co0.5Mn0.5O2 cathode material with excellent rate capability and cycling stability for sodium ion batteries

Recent Progress in Electrode Materials for Sodium‐Ion Batteries

Advanced Cathode Materials for Sodium‐Ion Batteries: What Determines Our Choices?

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Product

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About

Stable layered P3/P2 Na_0.66Co_0.5Mn_0.5O₂ cathode materials for sodium-ion batteries

A P2-Na_0.67Co_0.5Mn_0.5O₂ cathode material with excellent rate capability and cycling stability for sodium ion batteries

A P2-Na_0.67Co_0.5Mn_0.5O₂ cathode material with excellent rate capability and cycling stability for sodium ion batteries