Na4Co3(PO4)2P2O7: A novel storage material for sodium-ion batteries

Nose, Masafumi; Nakayama, Hideki; Nobuhara, Katsuya; Yamaguchi, Hiroyuki; Nakanishi, Shinji; Iba, Hideki

doi:10.1016/j.jpowsour.2013.01.162

Cited by 226 publications

(150 citation statements)

References 21 publications

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“…The refinement has been performed with satisfactory agreement factors (R wp = 4.79%, R p = 3.45%, goodness of fit = 2.13) (ICSD (Inorganic Crystal Structure Database) 236316). 27 The diffractogram reported in Figure 1a presents no evidence of impurity phases, suggesting that the synthesis conditions adopted are suitable for obtaining pure Na 4 Ni 3 (PO 4 ) 2 (P 2 O 7 ). The refined cell parameters and atomic occupancy values are summarized and presented, respectively, in Supplementary Tables S1 and S2 .…”

Section: Resultsmentioning

confidence: 90%

“…The results herein presented differ slightly from those already reported for the Fe-based analog system, suggesting different structural changes in the potential range investigated. 26,27 The Na occupancies, reported in Table S3, indicate that the sodium cations located in the large channels constructed by the P 2 O 7 dimers, that is, the Na1 and Na4 sites, can be electrochemically removed first at relatively low potentials, resulting in the decrease of the a lattice parameter and leading to a volume change of 1.6%. When charging up to 5.0 V, the other two sodium cations, that is, from Na2 and Na3 sites, are extracted subsequently, leading to the rapid increase in the b parameter.…”

Section: Exploring the Ni Redox Activity In Polyanionic Compoundsmentioning

confidence: 99%

“…25,26 However, the Na 4 Co 3 (PO 4 ) 2 (P 2 O 7 ) synthesized by a sol-gel method shows an average working potential of~4.4 V vs Na + /Na and a high rate capability for Na ions. 27 A combination of different polyanionic groups could contribute to outstanding ion diffusion and voltage profile in Na-ion batteries as well as structure stability during the Na (de-)insertion process. Interestingly, a theoretical prediction reported by Islam and colleagues 28 has pointed out that doping the Na 4 Fe 3 (PO 4 ) 2 (P 2 O 7 ) with Ni can lead to a significant increase in the cell voltage.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the Ni redox activity in polyanionic compounds as conceivable high potential cathodes for Na rechargeable batteries

et al. 2017

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Although nickel-based polyanionic compounds are expected to exhibit a high operating voltage for batteries based on the Ni 2+/3+ redox couple activity, some rare experimental studies on the electrochemical performance of these materials are reported, resulting from the poor kinetics of the bulk materials in both Li and Na nonaqueous systems. Herein, the electrochemical activity of the Ni 2+/3+ redox couple in the mixed-polyanionic framework Na 4 Ni 3 (PO 4 ) 2 (P 2 O 7 ) is reported for the first time. This novel material exhibits a remarkably high operating voltage when cycled in sodium cells in both carbonate-and ionic liquid-based electrolytes. The application of a carbon coating and the use of an ionic liquid-based electrolyte enable the reversible sodium ion (de-)insertion in the host structure accompanied by the redox activity of Ni 2+/3+ at operating voltages as high as 4.8 V vs Na/Na + . These results present the realization of Ni-based mixed polyanionic compounds with improved electrochemical activity and pave the way for the discovery of new Na-based high potential cathode materials. NPG Asia Materials (2017) 9, e370; doi:10.1038/am.2017.41; published online 31 March 2017 INTRODUCTION Lithium-ion batteries have been largely recognized as the most efficient electrochemical energy storage devices for both portable electronics and electric vehicle applications. 1,2 However, the growth and diversification of the energy storage market trigger interest in low-cost and environmentally friendly alternative systems. In addition, recent concerns over the cost and future availability of lithium highlight the urgent need to exploit alternative energy storage systems. 3 In these terms, sodium (Na)-ion batteries are attractive candidates because of the electrochemistry that is similar to the well-established lithium-ion technology. 4 To date, the LiFePO 4 olivine with (PO 4 ) 3 − polyanionic framework, owing to its superior thermal stability and low cost, is considered to be one of the best electrode materials for lithium-ion batteries, mostly in view of its stable operating voltage and satisfactory specific capacity. However, the intrinsic tunability of the operating voltage of polyanionic compounds because of the presence of different transition metals such as Mn, Co and Ni 5-7 has triggered interest in alternative frameworks exhibiting higher cell voltages. According to theoretical prediction, lithium nickel phosphate has a remarkably high working potential (~5.1 V vs Li + /Li) because of the Ni 2+/3+ redox activity. 8 Unfortunately, several studies have demonstrated that the implementation of this material is restricted by several drawbacks such as the intrinsic sluggish kinetics attributable to the low electronic conductivity, the poor lithium transport in commonly used electrolyte systems and the structural

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Section: Resultsmentioning

confidence: 90%

Section: Exploring the Ni Redox Activity In Polyanionic Compoundsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exploring the Ni redox activity in polyanionic compounds as conceivable high potential cathodes for Na rechargeable batteries

et al. 2017

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“…In other words, even for the unstable intermediate phases, if their energy level is shallow enough the presence of intermediate phases is beneficial for cell kinetics in fast rate conditions. Likewise, we expect that the small polarization and high rate capability of Na 4 Co 3 (PO 4 ) 2 P 2 O 7 are also attributed to the multiple intermediate phases with small lattice differences (41).…”

Section: Significancementioning

confidence: 96%

Role of intermediate phase for stable cycling of Na ₇ V ₄ (P ₂ O ₇ ) ₄ PO ₄ in sodium ion battery

Lim

Kim

Chung

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

139

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Sodium ion batteries offer promising opportunities in emerging utility grid applications because of the low cost of raw materials, yet low energy density and limited cycle life remain critical drawbacks in their electrochemical operations. Herein, we report a vanadium-based ortho-diphosphate, Na 7 V 4 (P 2 O 7 ) 4 PO 4 , or VODP, that significantly reduces all these drawbacks. Indeed, VODP exhibits single-valued voltage plateaus at 3.88 V vs. Na/Na + while retaining substantial capacity (>78%) over 1,000 cycles. Electronic structure calculations reveal that the remarkable single plateau and cycle life originate from an intermediate phase (a very shallow voltage step) that is similar both in the energy level and lattice parameters to those of fully intercalated and deintercalated states. We propose a theoretical scheme in which the reaction barrier that arises from lattice mismatches can be evaluated by using a simple energetic consideration, suggesting that the presence of intermediate phases is beneficial for cell kinetics by buffering the differences in lattice parameters between initial and final phases. We expect these insights into the role of intermediate phases found for VODP hold in general and thus provide a helpful guideline in the further understanding and design of battery materials.cathode | single voltage | atomic reorganization | ab initio calculation S odium ion batteries (SIBs) provide advantages of unlimited resource, low material cost, and easy worldwide accessibility that could make them the material of choice for grid-scale energy storage systems (1, 2). Unfortunately, the electrochemical performance of current SIBs remains inferior to that of lithium ion batteries (LIBs). In particular, we require SIB cathode materials that give a long cycle life with large capacities and high voltages under fast operating conditions, comparable to the Li counterparts.Numerous layered Na x MO 2 [M = Co, Mn, Fe, Ni, Cr, and multicomponent transition metals (TMs)] have been intensively studied as candidate SIB cathodes because such layer-structured materials typically exhibit higher capacities than other classes of materials (3-10). However, they suffer from a substantial capacity decay with cycling, owing to crystal structure collapse and/or unstable electrode-electrolyte interfaces (10). For more stable host frameworks, various polyanion structures have also been studied as SIB cathodes as a natural extension of the success shown in the LIB materials of the same classes, including TM fluorophosphates (11-15), pyrophosphates (16-18) and phosphates (19)(20)(21)(22). However, most of these materials still exhibited insufficient cycle lifetimes and large voltage steps that limit their practical capacity. The Prussian blue family has also been extensively investigated for both organic (23, 24) and aqueous electrolytes (25) owing to its unique advantages related to low material cost, low temperature synthesis, and decent electrochemical performance from well-developed ionic channel structures. However, the as-syn...

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“…[1][2][3][4][5] Recently, a number of new electrode active materials have been reported for both positive electrodes (e.g. Na 4 Co 3 (PO 4 ) 2 P 2 O 7 ) 6 and negative electrodes (e.g. amorphous phosphorus-carbon composites).…”

Section: Introductionmentioning

confidence: 99%

Charge-discharge Performance of an Ionic Liquid-based Sodium Secondary Battery in a Wide Temperature Range

2015

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A sodium secondary battery has been constructed by using a nonvolatile and nonflammable Na[FSA]-[C 3 C 1 pyrr][FSA] (FSA = bis(fluorosulfonyl)amide, C 3 C 1 pyrr = N-methyl-N-propylpyrrolidinium) ionic liquid, a NaCrO 2 positive electrode and a Na metal negative electrode. The charge-discharge performance is evaluated over a wide temperature range of −20-90°C. It has been demonstrated that the sodium secondary battery has long cycle lives both at a high temperature of 90°C and at a low temperature of 0°C. Thus, the ionic liquid-based sodium secondary battery is expected to be a viable alternative to lithium ion battery for many applications.

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Na4Co3(PO4)2P2O7: A novel storage material for sodium-ion batteries

Cited by 226 publications

References 21 publications

Exploring the Ni redox activity in polyanionic compounds as conceivable high potential cathodes for Na rechargeable batteries

Exploring the Ni redox activity in polyanionic compounds as conceivable high potential cathodes for Na rechargeable batteries

Role of intermediate phase for stable cycling of Na ₇ V ₄ (P ₂ O ₇ ) ₄ PO ₄ in sodium ion battery

Charge-discharge Performance of an Ionic Liquid-based Sodium Secondary Battery in a Wide Temperature Range

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Na4Co3(PO4)2P2O7: A novel storage material for sodium-ion batteries

Cited by 226 publications

References 21 publications

Exploring the Ni redox activity in polyanionic compounds as conceivable high potential cathodes for Na rechargeable batteries

Exploring the Ni redox activity in polyanionic compounds as conceivable high potential cathodes for Na rechargeable batteries

Role of intermediate phase for stable cycling of Na 7 V 4 (P 2 O 7 ) 4 PO 4 in sodium ion battery

Charge-discharge Performance of an Ionic Liquid-based Sodium Secondary Battery in a Wide Temperature Range

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Role of intermediate phase for stable cycling of Na ₇ V ₄ (P ₂ O ₇ ) ₄ PO ₄ in sodium ion battery