Cathode properties of Na3M2(PO4)2F3 [M = Ti, Fe, V] for sodium-ion batteries

Chihara, Kuniko; Kitajou, Ayuko; Gocheva, Irina; Okada, Shigeto; Yamaki, Jun Ichi

doi:10.1016/j.jpowsour.2012.10.034

Cited by 190 publications

(156 citation statements)

References 14 publications

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“…[3][4][5][6][7][8][9] Amongt he aforementioned materials, layered metal oxidesh ave an umber of advantages including facile synthesis, high theoreticalc apacity,a nd high workingv oltage. [5,[10][11][12] Therefore, the exploration of mixed layered oxidesa se nergystoragem aterials will advance the constructiono fh igh-performance SIBs.…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Na_2/3(Mn_0.54Ni_0.13Co_0.13)O₂ Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

et al. 2015

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For the first time, atomic layer deposition (ALD) of Al2 O3 was adopted to enhance the cyclic stability of layered P2-type Na2/3 (Mn0.54 Ni0.13 Co0.13 )O2 (MNC) cathodes for use in sodium-ion batteries (SIBs). Discharge capacities of approximately 120, 123, 113, and 105 mA h g(-1) were obtained for the pristine electrode and electrodes coated with 2, 5, and 10 ALD cycles, respectively. All electrodes were cycled at the 1C discharge current rate for voltages between 2 and 4.5 V in 1 M NaClO4 electrolyte. Among the electrodes tested, the Al2 O3 coating from 2 ALD cycles (MNC-2) exhibited the best electrochemical stability and rate capability, whereas the electrode coated by 10 ALD cycles (MNC-10) displayed the highest columbic efficiency (CE), which exceeded 97 % after 100 cycles. The enhanced electrochemical stability observed for ALD-coated electrodes could be a result of the protection effects and high band-gap energy (Eg =9.00 eV) of the Al2 O3 coating layer. Additionally, the metal-oxide coating provides structural stability against mechanical stresses occurring during the cycling process. The capacity, cyclic stability, and rate performance achieved for the MNC electrode coated with 2 ALD cycles of Al2 O3 reveal the best results for SIBs. This study provides a promising route toward increasing the stability and CE of electrode materials for SIB application.

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Section: Introductionmentioning

confidence: 99%

Highly Stable Na_2/3(Mn_0.54Ni_0.13Co_0.13)O₂ Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

et al. 2015

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“…A variety of compounds, such as oxides [9,26], phosphates [27,28], fluorophosphates [29,30], pyrophosphates [31,32], and cyanoferrates [33,34], have been identified as potential cathodes for NIBs. Among them, manganese-oxide-based materials are attractive because of their low cost and non-toxicity [35,36].…”

Section: Introductionmentioning

confidence: 99%

Rechargeable Na/Na0.44MnO2 cells with ionic liquid electrolytes containing various sodium solutes

Wang

Yeh

Wongittharom

et al. 2015

Journal of Power Sources

106

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“…[157,158] The mixed polyanion compounds, for example Na 4 Fe 3 (PO 4 ) 2 (P 2 O 7 ), were also synthesized using a similar solid-state method by using Na 4 P 2 O 7 , Fe 2 C 2 O 4 ·2H 2 O, and NH 4 H 2 PO 4 with a stoichiometric ratio as the starting materials. [178] 4.…”

Section: Summary Of Synthesis Methodsmentioning

confidence: 99%

“…[157,158] The enhanced inductive effect and high working potential can be a key to moderate the energy-density issue of the cathode materials for SIBs. Among them, vanadiumbased fluorophosphates have gained the most attention owing to the highly redoxactive V 3+/ V 4+ couple, with an operating voltage expected to be 3.9 V. [159] Sodiumvanadium fluorophosphates can be classified into three types of polymorphs, such as tetragonal NaVPO 4 F, Na 3 (VO) 2 (PO 4 ) 2 F and Na 3 V 2 (PO 4 ) 2 F 3 in terms of the phase and component.…”

Section: Fluorophosphatesmentioning

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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Cathode properties of Na3M2(PO4)2F3 [M = Ti, Fe, V] for sodium-ion batteries

Cited by 190 publications

References 14 publications

Highly Stable Na_2/3(Mn_0.54Ni_0.13Co_0.13)O₂ Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

Highly Stable Na_2/3(Mn_0.54Ni_0.13Co_0.13)O₂ Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

Rechargeable Na/Na0.44MnO2 cells with ionic liquid electrolytes containing various sodium solutes

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

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Cathode properties of Na3M2(PO4)2F3 [M = Ti, Fe, V] for sodium-ion batteries

Cited by 190 publications

References 14 publications

Highly Stable Na2/3(Mn0.54Ni0.13Co0.13)O2 Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

Highly Stable Na2/3(Mn0.54Ni0.13Co0.13)O2 Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

Rechargeable Na/Na0.44MnO2 cells with ionic liquid electrolytes containing various sodium solutes

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

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Product

Resources

About

Highly Stable Na_2/3(Mn_0.54Ni_0.13Co_0.13)O₂ Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

Highly Stable Na_2/3(Mn_0.54Ni_0.13Co_0.13)O₂ Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries