Electrospun P2-type Na2/3(Fe1/2Mn1/2)O2 Hierarchical Nanofibers as Cathode Material for Sodium-Ion Batteries

Kalluri, Sujith; Seng, Kuok Hau; Pang, Wei Kong; Guo, Zaiping; Chen, Zhuo; Liu, Huan; Dou, Shi Xue

doi:10.1021/am502343s

Cited by 133 publications

(90 citation statements)

References 32 publications

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“…The performance of P2-Na 2/3 [Fe 1/2 Mn 1/2 ]O 2 can be further improved by nanocrystallization, morphology control, and structural design. [163][164][165][166] In addition, the P2-Na 2/3 [Fe 1/2 Mn 1/2 ]O 2 may be somewhat oxidized by water when exposing to air, resulting in the formation of P2-Na 1/2 [Fe 1/2 Mn 1/2 ]O 2 and NaOH. [36] It has also been reported that the as-prepared P2-Na 2/3 [Fe 1/2 Mn 1/2 ]O 2 is sensitive to air, in particular uptake of CO 2 in air, forming electrochemical inactive Mn 4+ on the surface of active materials.…”

Section: Fe/mn-based Oxidesmentioning

confidence: 99%

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Wang

You

Yin

et al. 2017

Advanced Energy Materials

572

445

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sources into large-scale grids, inexpensive, efficient, and fast-responding electrical energy storage (EES) systems are essential to store the off-peak energy and releasing the stored energy during the onpeak period. Among various EES systems, rechargeable batteries represent one of the most competitive technologies because of their high conversion efficiency and environmental friendliness. [1][2][3][4] For stationary EES systems, batteries with low cost, high safety, high rate capability, and long cycle stability are highly desired.Lithium (Li)-ion batteries (LIBs) have achieved great success in the market of portable electronics and electric vehicles since their commercialization by Sony Company in 1991. However, the shortage of Li resources in nature gives rise to a concern about its sustainable development in grid scale. Compared with Li, sodium resource has rich natural abundance in the earth crust and a worldwide distribution, consequently leading to a low price of sodium-based raw materials (e.g., the cost of Na 2 CO 3 is about 25-30 times lower than that of Li 2 CO 3 ). Besides, sodium has a suitable redox potential (E 0 (Na + /Na) = −2.71 V versus standard hydrogen electrode (SHE), 0.3 V above that of Li + /Li) and similar physical and chemical properties with lithium. [5,6] Therefore, rechargeable sodium-ion batteries (SIBs), which have a similar "rockingchair" working principle of LIBs, are emerging as an appealing choice as alternatives for LIBs. Note that it is difficult for SIBs to bypass LIBs in terms of energy densities because of the much higher weight of Na and lower standard electrochemical potential. [7][8][9][10] Nevertheless, the use of low-cost materials, including inexpensive Na-based raw materials and Al current collectors for both cathodes and anodes in SIBs, could significantly reduce the cost. In this case, SIBs could be applied where cost-effectiveness rather than energy density is the most critical issue, e.g., in the field of large-scale EES. As a result, sodiumbased electroactive materials are enjoying renewed interest especially for very low cost systems for grid storage. [11,12] Given that cathode materials are the key component that determines energy density and cost, tremendous efforts have been devoted to exploring suitable positive electrode materials with high reversible capacity, rapid Na ions insertion/extraction, and good cycling stability in the past few years. [13,14] A broad range of compounds, including layered oxides, polyanionic frameworks, hexacyanoferrates, and organics, haveThe increasing demand for replacing conventional fossil fuels with clean energy or economical and sustainable energy storage drives better battery research today. Sodium-ion batteries (SIBs) are considered as a promising alternative for grid-scale storage applications due to their similar "rockingchair" sodium storage mechanism to lithium-ion batteries, the natural abundance, and the low cost of Na resources. Searching for appropriate electrode materials with acceptable electrochemical perfor...

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Section: Fe/mn-based Oxidesmentioning

confidence: 99%

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Wang

You

Yin

et al. 2017

Advanced Energy Materials

572

445

View full text Add to dashboard Cite

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“…It is 7 obvious that the carbon contents increases proportionally with the polymerization time (Fig. 1b).…”

Section: Resultsmentioning

confidence: 87%

“…Most of the researches are focused on lithium analogues, such as transition metal oxides and polyanionic materials which are now considered as high-performance electrode materials in LIBs [7][8][9][10][11][12]. In the case of anode part, graphite, the most utilized anode for commercial LIBs, was proved to have limited 3 sodium intercalation capability [13].…”

Section: Introductionmentioning

confidence: 99%

Tuning the carbon content on TiO 2 nanosheets for optimized sodium storage

Wen

Yun

Luo

et al. 2016

Electrochimica Acta

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Titanium dioxide (TiO2) has been considered as a promising anode candidate for sodium ion batteries (NIBs). In this work, we report the synthesis of anatase TiO2 nanosheets coated by nitrogen doped carbon derived from dopamine precursor (TiO2@C) as high performance anode materials for NIBs applications. The carbon contents can be controlled from 2.6 wt% to 10.4 wt% by varying the polymerization time of dopamine. X-ray diffraction patterns confirm there is no phase change after carbon coating. When employed as an anode for NIBs, the TiO2@C composites exhibit improved electrochemical performances in terms of higher specific capacity and better cycling stability compared to pure TiO2 nanosheets. Notably, with a carbon content of 4.8 wt%, the TiO2@C nanosheets delivers a reversible capacity of 180 mA h g -1 and shows stable cycling performance with no discharge capacity decay from 2 nd cycle onward over 50 cycles. Even at high current density of 10 C, the capacity still remains 82 mA h g -1 . The excellent cycling stability and rate performances can be 2 ascribed to the protective effects of carbon coating layer which reserves the structure stability and enhances electrical conductivity during cycling.

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“…[74] Electrospun P2-Na 2/3 (Fe 1/2 Mn 1/2 )O 2 hierarchical nanofibers showed a promising electrochemical performance in SIBs, with an initial discharge capacity of ≈195 mA h g −1 at 0.1C and improved cycling stability with a capacity retention of 86.4% over 80 cycles. [75] Recently, an air-stable and Co/Ni-free O3-Na 0.9 [Cu 0.22 Fe 0.30 Mn 0.48 ]O 2 cathode (2.5-4.5V) showed an energy density of 210 W h kg −1 and a high round-trip energy efficiency of 90%, as well as excellent cycling stability, while the control sample, O3-NaFe 1/2 Mn 1/2 O 2 , is not stable against water and shows relatively large polarization in the charge and discharge curves. [47] Aiming to further improve the electrochemical performance, ternary and quaternary metal oxides cathodes have been extensively investigated in the past years.…”

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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Electrospun P2-type Na_2/3(Fe_1/2Mn_1/2)O₂ Hierarchical Nanofibers as Cathode Material for Sodium-Ion Batteries

Cited by 133 publications

References 32 publications

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Tuning the carbon content on TiO 2 nanosheets for optimized sodium storage

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

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