Mixed polyanion NaCo1−x (VO) x PO4 glass–ceramic cathode: role of ‘Co’ on structural behaviour and electrochemical performance

Suman, G.; Rao, Ch. Srinivasa; Ojha, Prasanta Kumar; Babu, M.; Rao, R. Prasada

doi:10.1007/s10853-016-0741-7

Cited by 22 publications

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“…[ 16–22 ] Our group has successfully improved the electrochemical performance of a wide variety of amorphous‐based glass and glass–ceramic‐based cathode components to meet these gaps and limitations. [ 23–25 ] Due to the technological significance, we present in this investigation a method to improve electrochemical impedance spectra (EIS) of mixed polyanion NaMn 1− x (VO) x PO 4 ( x = 0.1, 0.3, 05, 0.7 mol%) glass and glass–ceramic system in correlation with microstructural variations. Also, we report its applicability as high‐capacity cathode material for use in Na‐ion battery.…”

Section: Introductionmentioning

confidence: 99%

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

et al. 2020

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This investigation demonstrates the electrochemical performance of glass and glass–ceramic NaMn1−x(VO)xPO4 (x = 0.1, 0.3, 05, 0.7 mol%, and labeled as NM1−xVxP) cathode material system via phase details, structural illustration, electronic conductivity, and reversible capacity, etc. Pro‐crystal calculation analysis is used to monitor Na+ ion pathways’ migration for as‐precipitated NaMnPO4, Na2MnP2O7, and NaVO3 phases. The highest conductivity is achieved (≈5.92 × 10−7 S cm−1) for the glass–ceramic sample having x = 0.3 mol% (NM0.7V0.3P) due to the lowest charge transfer resistance (Rct). Electrochemical measurements of the best conducting sample using coin half‐cell exhibit two distinct voltage plateaus at 2 and 2.9 V versus Na/Na+, facilitating the active centers in two directions. The cyclability test of best‐conducting NM0.7V0.3P glass–ceramic network exhibits adequate reversible capacity up to 97% of the specific capacity even up to 50 cycles, which satisfies its superior stability for longer durations.

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Section: Introductionmentioning

confidence: 99%

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

et al. 2020

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“…Precursor glass samples were further subjected to heat treatment at their corresponding crystallization temperatures ( T c ), as determined by DTA patterns (Figure ) for about 6 hours in a tubular furnace with 5% H 2 ‐95% Ar gas flow in order to obtain their glass‐ceramics. Interestingly, the same composition [Na 1.5 Sn 0.5 Ge 1.5 (PO 4 ) 3 ] was achieved the highest thermal stability (Δ T ) of the glass against crystallization before (Δ T = 66) and after crystallization (Δ T = 60) (Table ) . In this view, [Na 1.5 Sn 0.5 Ge 1.5 (PO 4 ) 3 ] glass‐ceramic sample exhibits low T g (572 K), this lowest order may to be directly related to the formation of higher concentrations of GeO 6 octahedra.…”

Section: Resultsmentioning

confidence: 93%

“…Interestingly, the same composition [Na 1.5 Sn 0.5 Ge 1.5 (PO 4 ) 3 ] was achieved the highest thermal stability (DT) of the glass against crystallization before (DT = 66) and after crystallization (DT = 60) ( Table 1). 24 In this view, [Na 1.5 Sn 0.5 Ge 1.5 (PO 4 ) 3 ] glass-ceramic sample exhibits low T g (572 K), this lowest order may to be directly related to the formation of higher concentrations of GeO 6 octahedra. This is directly related to the partial replacement of Ge 4+ ions by Sn 4+ ions in the sodium-phosphate glass network as compared to other samples under investigation which will definitely expected to achieve the better EIS properties.…”

Section: Methodsmentioning

confidence: 90%

High Na‐ion conducting Na_1+x[Sn_xGe_2−x(PO₄)₃] glass‐ceramic electrolytes: Structural and electrochemical impedance studies

et al. 2017

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Na-ion conducting Na 1+x [Sn x Ge 2Àx (PO 4 ) 3 ] (x = 0, 0.25, 0.5, and 0.75 mol%) glass samples with NASICON-type phase were synthesized by the melt quenching method and glass-ceramics were formed by heat treating the precursor glasses at their crystallization temperatures. XRD traces exhibit formation of most stable crystalline phase NaGe 2 (PO 4 ) 3 (ICSD-164019) with trigonal structure. Structural illustration of sodium germanium phosphate [NaGe 2 (PO 4 ) 3 ] displays that each germanium is surrounded by 6 oxygen atom showing octahedral symmetry (GeO 6 ) and phosphorous with 4 oxygen atoms showing tetrahedral symmetry (PO 4 ). The highest bulk Na + ion conductivities and lowest activation energy for conduction were achieved to be 8.39 9 10 À05 S/cm and 0.52 eV for the optimum substitution levels (x = 0.5 mol%, Na on Na-Ge-P network. CV studies of the best conducting Na 1.5 [Sn 0.5 Ge 1.5 (PO 4 ) 3 ]glass-ceramic electrolyte possesses a wide electrochemical window of 6 V. The structural and EIS studies of these glass-ceramic electrolyte samples were monitored in light of the substitution of Ge by its larger homologue Sn.conductivity, electrical properties, glass-ceramics, microstructure | INTRODUCTIONInvestigations on Na-ion battery technology have attracted significantly in the last few years as emerging storage technology for stationary applications such as grid-scale, mini grid energy storage devices, and also for renewable energy integration such as solar and wind power where gravimetric energy can be compromised. 1,2 Solid-state electrolytes having high Na + ion conductivity are of interest for safest energy storage, lowest cost, long cycle life, and high rate capabilities which are critical to develop room-temperature rechargeable sodium batteries. 3 Systematic studies on electrolyte materials relatively limited in order to realize safer sodium ion batteries with improved performance that operate under ambient conditions in view of the fact that there is hardly accepted negative electrode. Hence, the current challenge is to investigate, characterize, and optimize suitable solid-state electrolyte materials with higher Na + ion conductivity, and engineer the desired properties to provide stable interfacial contact. Alkali oxide (Li/Na) glass and glass-ceramic electrolytes are being widely used in storage and sensing devices because of their better conducting and physicochemical properties than their crystalline counter parts and further modified as a function of composition and controlled crystallization. [4][5][6] Hayashi et al. have been reported on chemical, mechanical, and ionic conductivity studies to closely meet desired current densities of various glass and glass-ceramic electrolytes mixed with various modifiers.7-9 Among several oxide glass electrolytes for sodium ion secondary batteries, sodium-

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“…The use of Na-ion battery (NIB) technology for largescale grid storage has been demonstrated in recent years to be a viable alternative to Li-ion battery technology, with further development being possible due to major advantages such as low cost and abundant natural resources [1][2][3]. Although Na-ion and Li-ion batteries operate on the same principle, it has been demonstrated through a variety of experimental investigations that the respective crystallographic structural functions aiding cationic intercalation in the case of Li intercalation compounds and Na-ion intercalation compounds are distinct [4][5][6][7][8]. Furthermore, when a higher concentration of heavier Na ?…”

Section: Introductionmentioning

confidence: 99%

Amorphous SnO–Sb2O3–SiO2 glassy anode: high-performance electrode materials for Na-ion batteries

Gandi

Panda

Parne

et al. 2021

J Mater Sci: Mater Electron

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Amorphous SnO-Sb 2 O 3 -SiO 2 glass anode prepared by simple mechanical ball milling method. Physical and electrochemical properties of prepared glass anode identified by X-ray powder diffraction (XRD), scanning electron microscopy, cyclic voltammetry, galvanostatic, and electrochemical impedance spectroscopy (EIS) techniques. Amorphous nature of SnO-Sb 2 O 3 -SiO 2 60 h of ballmilled glass anode confirmed by XRD technique. The glass anode showed excellent electrochemical performance up to 100 cycles in the voltage range between 0 and 3.0 V. Cycle performance tests showed that the anode delivered a specific discharge and charge capacity of 782 and 654 mAh g -1 with 100% columbic efficiency about 100 cycles at 0.5 C rate. Its shows * 99% capacity retention even at a high-capacity rate of 5 C with a current density of 258 mAh g -1 . The EIS spectroscopy revealed that the charge transfer resistance (R ct ) decreasing to an increasing cycle number which ascribed to superior conductivity of glass anode. This research contributed to the development of a largescale preparation procedure for high-performance SnO-Sb 2 O 3 -SiO 2 glass anode materials for use in Na-ion batteries.

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Mixed polyanion NaCo1−x (VO) x PO4 glass–ceramic cathode: role of ‘Co’ on structural behaviour and electrochemical performance

Cited by 22 publications

References 31 publications

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

High Na‐ion conducting Na_1+x[Sn_xGe_2−x(PO₄)₃] glass‐ceramic electrolytes: Structural and electrochemical impedance studies

Amorphous SnO–Sb2O3–SiO2 glassy anode: high-performance electrode materials for Na-ion batteries

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Mixed polyanion NaCo1−x (VO) x PO4 glass–ceramic cathode: role of ‘Co’ on structural behaviour and electrochemical performance

Cited by 22 publications

References 31 publications

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

High Na‐ion conducting Na1+x[SnxGe2−x(PO4)3] glass‐ceramic electrolytes: Structural and electrochemical impedance studies

Amorphous SnO–Sb2O3–SiO2 glassy anode: high-performance electrode materials for Na-ion batteries

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High Na‐ion conducting Na_1+x[Sn_xGe_2−x(PO₄)₃] glass‐ceramic electrolytes: Structural and electrochemical impedance studies