Effect of Fe3+ doping on the structure and conductivity of LiTi2(PO4)3

Veeraiah, V.; Rao, A. T.; Bonige, Kishore Babu

doi:10.1007/s11164-013-1348-0

Cited by 14 publications

(17 citation statements)

References 15 publications

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“…In addition, Rao et al showed improved ionic conductivity of LiTi 2 (PO 4 ) 3 when partial Ti 4+ is substituted by trivalent Fe 3+ with the composition of Li 1+ x Ti 2– x Fe x (PO 4 ) 3 ( x = 0.05, 0.1, and 0.15). [ 32 ] In particular, Li 1.15 Ti 1.85 Fe 0.15 (PO 4 ) 3 achieved ionic conductivity of 0.52 mS cm –1 at room temperature, which is comparable with that of LATP. [ 26,32–34 ] Apart from their decent ionic conductivities, NASICON‐type LiM 2 (PO 4 ) 3 materials consisting of transition metal ions are redox‐active.…”

Section: Introductionmentioning

confidence: 84%

“…[ 32 ] In particular, Li 1.15 Ti 1.85 Fe 0.15 (PO 4 ) 3 achieved ionic conductivity of 0.52 mS cm –1 at room temperature, which is comparable with that of LATP. [ 26,32–34 ] Apart from their decent ionic conductivities, NASICON‐type LiM 2 (PO 4 ) 3 materials consisting of transition metal ions are redox‐active. [ 35–37 ] Patoux et al demonstrated the reversible Li + insertion/extraction of NASICON‐type Li 2 FeTi(PO 4 ) 3 using the potentiostatic intermittent titration technique.…”

Section: Introductionmentioning

confidence: 86%

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Active Interphase Enables Stable Performance for an All‐Phosphate‐Based Composite Cathode in an All‐Solid‐State Battery

Liu

Windmüller

et al. 2022

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High interfacial resistance and unstable interphase between cathode active materials (CAMs) and solid‐state electrolytes (SSEs) in the composite cathode are two of the main challenges in current all‐solid‐state batteries (ASSBs). In this work, the all‐phosphate‐based LiFePO4 (LFP) and Li1.3Al0.3Ti1.7(PO4)3 (LATP) composite cathode is obtained by a co‐firing technique. Benefiting from the densified structure and the formed redox‐active Li3–xFe2–x–yTixAly(PO4)3 (LFTAP) interphase, the mixed ion‐ and electron‐conductive LFP/LATP composite cathode facilitates the stable operation of bulk‐type ASSBs in different voltage ranges with almost no capacity degradation upon cycling. Particularly, both the LFTAP interphase and LATP electrolyte can be activated. The cell cycled between 4.1 and 2.2 V achieves a high reversible capacity of 2.8 mAh cm–2 (36 µA cm–2, 60 °C). Furthermore, it is demonstrated that the asymmetric charge/discharge behaviors of the cells are attributed to the existence of the electrochemically active LFTAP interphase, which results in more sluggish Li+ kinetics and more expansive LFTAP plateaus during discharge compared with that of charge. This work demonstrates a simple but effective strategy to stabilize the CAM/SSE interface in high mass loading ASSBs.

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Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 86%

Active Interphase Enables Stable Performance for an All‐Phosphate‐Based Composite Cathode in an All‐Solid‐State Battery

Liu

Windmüller

et al. 2022

Small

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“…The simplest NASICON stoichiometry is the A (I) B (IV) 2 (PO 4 ) 3 formula, in which A (I) is as a mobile cation and B (IV) is a tetravalent cation. LiTi 2 (PO 4 ) 3 , LiHf 2 (PO 4 ) 3 , and LiGe 2 (PO 4 ) 3 are common examples. ,,, However, many possibilities for cationic substitutions are allowed in these materials . The A (I) 1+ x B (III) x B (IV) 2– x (PO 4 ) 3 stoichiometry certainly represents the greater portion of NASICONs currently studied.…”

Section: General Aspects Of Nasicon Structurementioning

confidence: 99%

“…The synthesis and processing methods applied for electrolyte preparation play a role in its conductivity. Synthesis of NASICON by several methods such as solid-state reaction ,− and wet-chemical methods (sol–gel, ,, hydro/solvothermal, , coprecipitation, , and polymeric precursor ,,− ) have been discussed in the literature. These methods allow different degrees of composition and particle size controls, influencing the electrolyte conductivity in its final form.…”

Section: Introductionmentioning

confidence: 99%

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Methods for Lithium Ion NASICON Preparation: From Solid-State Synthesis to Highly Conductive Glass-Ceramics

2020

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Lithium ion-containing Na + Super Ionic Conductor (NASICON) electrolytes are important materials for new energystorage technologies. The NASICON abbreviation represents several compounds with similar structures applied as solid electrolytes, including those conductors of lithium ions. Different methods have been used to synthesize these materials, as well as innumerous other methods used to form the electrolyte in its final shape. The synthesis methods and processing techniques significantly affect the microstructure and conductivity of the electrolyte as a result. Therefore, this paper provides an overview of the main synthesis methods and processing techniques applied for lithium ion NASICON production. First, a general view of the NASICON structure and the variety of possible compositions will be discussed. Next, the influence of the synthesis methods (e.g., solid-state reaction, sol−gel, polymeric precursor, sol−gel/ electrospinning) and sintering techniques (e.g., conventional, microwave, and Spark Plasma Sintering) will be presented. A special topic will be devoted for glass-ceramics production and evaluation, based on their advantageous ionic conductivity and potentiality for practical use on a large-scale. Moreover, the current results for electrochemical cells simulating the application of these materials in batteries will be presented. Finally, a general point of view of the authors about the future for NASICON electrolytes will be provided, presenting oncoming trends for research.

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Defect Strategy in Solid‐State Lithium Batteries

Mi,

Chen,

et al. 2023

Small Methods

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Solid‐state lithium batteries (SSLBs) have great development prospects in high‐security new energy fields, but face major challenges such as poor charge transfer kinetics, high interface impedance, and unsatisfactory cycle stability. Defect engineering is an effective method to regulate the composition and structure of electrodes and electrolytes, which plays a crucial role in dominating physical and electrochemical performance. It is necessary to summarize the recent advances regarding defect engineering in SSLBs and analyze the mechanism, thus inspiring future work. This review systematically summarizes the role of defects in providing storage sites/active sites, promoting ion diffusion and charge transport of electrodes, and improving structural stability and ionic conductivity of solid‐state electrolytes. The defects greatly affect the electronic structure, chemical bond strength and charge transport process of the electrodes and solid‐state electrolytes to determine their electrochemical performance and stability. Then, this review presents common defect fabrication methods and the specific role mechanism of defects in electrodes and solid‐state electrolytes. At last, challenges and perspectives of defect strategies in high‐performance SSLBs are proposed to guide future research.

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Effect of Fe3+ doping on the structure and conductivity of LiTi2(PO4)3

Cited by 14 publications

References 15 publications

Active Interphase Enables Stable Performance for an All‐Phosphate‐Based Composite Cathode in an All‐Solid‐State Battery

Active Interphase Enables Stable Performance for an All‐Phosphate‐Based Composite Cathode in an All‐Solid‐State Battery

Methods for Lithium Ion NASICON Preparation: From Solid-State Synthesis to Highly Conductive Glass-Ceramics

Defect Strategy in Solid‐State Lithium Batteries

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