Na3TiV(PO4)3/C nanoparticles for sodium‐ion symmetrical and full batteries

Gao, Wei; Zhan, Renming; Aslam, Muhammad Kashif; Liu, Dingyu; Jiang, Jian; Xu, Maowen

doi:10.1002/est2.74

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…ion mobility. Of similar kind are Na 2 +x+y Zr 1– y Fe II x Fe III 1– x+y (PO 4 ) 3 , Li 2 Ti M (PO 4 ) 3 ( M = Cr, Fe), Na 2 TiFe(PO 4 ) 3 , Li 1.6 Na 0.4 TiCr(PO 4 ) 3 , Na 3 TiMn(PO 4 ) 3 , Na 3 ZrMn(PO 4 ) 3 , Li 2 FeTi(PO 4 ) 3 and Li 2 FeZr(PO 4 ) 3 Na 3 A Zr(PO 4 ) 3 ( A = Mg, Ni), Li 2.6 Na 0.4 NiZr(PO 4 ) 3 , Na 2 TiV(PO 4 ) 3 , Li 2 TiCr(PO 4 ) 3 , Na 3 TiV(PO 4 ) 3 . ,− Masquelier et al performed structural assessments of Na 3 Fe 2 (PO 4 ) 3 at low, as well as high temperatures. Subsequently, several reports were published on Na 3 Fe 2 (PO 4 ) 3 , which crystallizes in the monoclinic structure with a space group of C 2/ c , indicating low production cost and good structural stability. − However, the rhombohedral NASICON structure, which allows for more facile Na-transport, has not been reported for Na 3 Fe 2 (PO 4 ) 3 …”

Section: Introductionmentioning

confidence: 99%

Na₂ZrFe(PO₄)₃─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

et al. 2023

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A NASICON-structured earth-abundant mixed transition metal (T M ) containing Na-T M -phosphate, viz., Na 2 ZrFe(PO 4 ) 3 , has been prepared via a sol−gel route using a low-cost Fe 3+ -based precursor. The asprepared material crystallizes in the desired rhombohedral NASICON structure (space group: R3̅ c) at room temperature. Synchrotron X-ray diffraction (XRD), transmission electron microscopy, X-ray absorption spectroscopy, etc., have been performed to determine the crystal structure, associated details, composition, and electronic structures. In light of the structural features, as one of the possible functionalities of Na 2 FeZr(PO 4 ) 3 , Na-intercalation/deintercalation has been examined, which indicates the occurrence of reversible electrochemical Na-insertion/extraction via Fe 2+ / Fe 3+ redox at an average potential of ∼2.5 V. The electrochemical data and direct evidences from operando synchrotron XRD indicate that the rhombohedral structure is preserved during Na-insertion/extraction, albeit within a certain range of Na-content (i.e., ∼2−3 p.f.u.), beyond which rhombohedral → monoclinic transformation takes place. Within this range, Na-insertion/extraction takes place via solid-solution pathway, resulting in outstanding cyclic stability, higher Nadiffusivity, and good rate-capability. To the best of the authors' knowledge, this represents the first in-depth structural, compositional, and electrochemical studies with Na 2 ZrFe(PO 4 ) 3 , along with the interplay between those, which provide insights into the design of similar low-cost materials for various applications, including sustainable electrochemical energy storage systems.

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Section: Introductionmentioning

confidence: 99%

Na₂ZrFe(PO₄)₃─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

et al. 2023

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“…have high potential to function efficiently as bipolar electrodes due to multi-redox reactions involving more than two electrons in anodic and cathodic regions. [16][17][18][19] Recently, NASICON electrodes have been investigated for their fast ionic diffusion coefficient, lower sodium ion migration barrier than their lithium analog, and excellent sodium-storage performance. [20,21] The interest in polyanionic-based materials for NIBs has increased considerably as they have stable sites for Na ion accommodation with high reversibility and no/negligible volume change.…”

Section: Introductionmentioning

confidence: 99%

“…Such bifunctional activity has been demonstrated in several electrodes such as Na 3 V 2 (PO 4 ) 3 , Na 2 VTi(PO 4 ) 3 , Na 3 V 1.5 Cr 0.5 (PO 4 ) 3 , Na 3 MnTi(PO 4 ) 3 , Na 3 FeV(PO 4 ) 3 , and Na 2 CrTi(PO 4 ) 3 . [16][17][18][19] Among them, Na 3 V 2 (PO 4 ) 3 (NVP) has great appeal for symmetrical SIB systems. Flat voltage plateaus, multiredox with a single transition metal, and a large voltage difference between the plateaus of the anodic and cathodic region can greatly improve the output of the NVP symmetrical cell.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Structural Phase Transitions in Na₃V₂(PO₄)₃Symmetrical Sodium‐Ion Batteries Using Synchrotron‐Based X‐Ray Techniques

et al. 2021

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Sodium‐ion batteries (SIBs) hold great potential for use in large‐scale grid storage applications owing to their low energy cost compared to lithium analogs. The symmetrical SIBs employing Na3V2(PO4)3 (NVP) as both the cathode and anode are considered very promising due to negligible volume changes and longer cycle life. However, the structural changes associated with the electrochemical reactions of symmetrical SIBs employing NVP have not been widely studied. Previous studies on symmetrical SIBs employing NVP are believed to undergo one mole of Na+ storage during the electrochemical reaction. However, in this study, it is shown that there are significant differences during the electrochemical reaction of the symmetrical NVP system. The symmetrical sodium‐ion cell undergoes ≈2 moles of Na+ reaction (intercalation and deintercalation) instead of 1 mole of Na+. A simultaneous formation of Na5V2(PO4)3 phase in the anode and NaV2(PO4)3 phase in the cathode is revealed by synchrotron‐based X‐ray diffraction and X‐ray absorption spectroscopy. A symmetrical NVP cell can deliver a stable capacity of ≈99 mAh g‐1, (based on the mass of the cathode) by simultaneously utilizing V3+/V2+ redox in anode and V3+/V4+ redox in cathode. The current study provides new insights for the development of high‐energy symmetrical NIBs for future use.

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Cathode nanoarchitectonics with Na₃VFe_0.5Ti_0.5(PO4)₃: Overcoming the energy barriers of multielectron reactions for sodium‐ion batteries

Soundharrajan,

Kim,

Nithiananth

et al. 2024

Carbon Energy

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High electrochemical stability and safety make Na+ superionic conductor (NASICON)‐class cathodes highly desirable for Na‐ion batteries (SIBs). However, their practical capacity is limited, leading to low specific energy. Furthermore, the low electrical conductivity combined with a decline in capacity upon prolonged cycling (>1000 cycles) related to the loss of active material‐carbon conducting contact regions contributes to moderate rate performance and cycling stability. The need for high specific energy cathodes that meet practical electrochemical requirements has prompted a search for new materials. Herein, we introduce a new carbon‐coated Na3VFe0.5Ti0.5(PO4)3 (NVFTP/C) material as a promising candidate in the NASICON family of cathodes for SIBs. With a high specific energy of ∼457 Wh kg−1 and a high Na+ insertion voltage of 3.0 V versus Na+/Na, this cathode can undergo a reversible single‐phase solid‐solution and two‐phase (de)sodiation evolution at 28 C (1 C = 174.7 mAh g−1) for up to 10,000 cycles. This study highlights the potential of utilizing low‐cost and highly efficient cathodes made from Earth‐abundant and harmless materials (Fe and Ti) with enriched Na+‐storage properties in practical SIBs.

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Na₃TiV(PO₄)₃/C nanoparticles for sodium‐ion symmetrical and full batteries

Cited by 9 publications

References 25 publications

Na₂ZrFe(PO₄)₃─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

Na₂ZrFe(PO₄)₃─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

Understanding the Structural Phase Transitions in Na₃V₂(PO₄)₃Symmetrical Sodium‐Ion Batteries Using Synchrotron‐Based X‐Ray Techniques

Cathode nanoarchitectonics with Na₃VFe_0.5Ti_0.5(PO4)₃: Overcoming the energy barriers of multielectron reactions for sodium‐ion batteries

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Na3TiV(PO4)3/C nanoparticles for sodium‐ion symmetrical and full batteries

Cited by 9 publications

References 25 publications

Na2ZrFe(PO4)3─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

Na2ZrFe(PO4)3─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

Understanding the Structural Phase Transitions in Na3V2(PO4)3Symmetrical Sodium‐Ion Batteries Using Synchrotron‐Based X‐Ray Techniques

Cathode nanoarchitectonics with Na3VFe0.5Ti0.5(PO4)3: Overcoming the energy barriers of multielectron reactions for sodium‐ion batteries

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Na₃TiV(PO₄)₃/C nanoparticles for sodium‐ion symmetrical and full batteries

Na₂ZrFe(PO₄)₃─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

Na₂ZrFe(PO₄)₃─A Rhombohedral NASICON-Structured Material: Synthesis, Structure and Na-Intercalation Behavior

Understanding the Structural Phase Transitions in Na₃V₂(PO₄)₃Symmetrical Sodium‐Ion Batteries Using Synchrotron‐Based X‐Ray Techniques

Cathode nanoarchitectonics with Na₃VFe_0.5Ti_0.5(PO4)₃: Overcoming the energy barriers of multielectron reactions for sodium‐ion batteries