Na+ ion conductors of glass–ceramics in the system Na1+xAlxGe2−xP3O12(0.3≤x≤1.0)

Zhang, Qunxi; Zhang, Wen; Liu, Yu; Song, Shufeng; Wu, Xiaofeng

doi:10.1016/j.jallcom.2008.12.106

Cited by 36 publications

(43 citation statements)

References 23 publications

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“…and A = Al, La, In, Cr, etc.) [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. However, since they consist of Ti 4+ ions, they are easy to be reduced when they are in contact with lithium metal, hence limiting their applications [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

Feng

Lai

2010

Journal of Alloys and Compounds

127

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Section: Introductionmentioning

confidence: 99%

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

Feng

Lai

2010

Journal of Alloys and Compounds

127

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“…Table summarizes that the average inner planar layer distances of germanium (Ge–Ge) is observed to be maximum (9.98 Å) for the Na 1.5 Sn 0.5 Ge 1.5 (PO 4 ) 3 glass‐ceramic sample which shows a free void path for migration of Na ions among all the glass‐ceramic samples under investigation (Figure B). These free wider paths for the transmission of Na + ions of glass‐ceramic electrolyte sample paves the way to form higher concentration of Na‐ion conducting pathways leading to achieve the ionic conductivity significantly . Furthermore, the precious information on migration of Na ions and their conduction pathways obtained from these investigations are highly helpful to carry out the electrochemical performance of all the Na 1+ x [Sn x Ge 2− x (PO 4 ) 3 ] glass‐ceramic electrolyte samples and also target the best composition.…”

Section: Resultsmentioning

confidence: 99%

“…These free wider paths for the transmission of Na + ions of glass-ceramic electrolyte sample paves the way to form higher concentration of Na-ion conducting pathways leading to achieve the ionic conductivity significantly. [30][31][32] Furthermore, the precious information on migration of Na ions and their conduction pathways obtained from these investigations are highly helpful to carry out the electrochemical performance of all the Na 1+x [Sn x Ge 2Àx (PO 4 ) 3 ] glass-ceramic electrolyte samples and also target the best composition.…”

Section: Structural Illustrationmentioning

confidence: 99%

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 LAGP has an advantage for electrochemical window because Ge 4+ is insensitive to reduction 12 in contrast with Ti 4+ . The LAGP preparation has been performed by melt-quenching [13][14][15] or solid-solution method 16 . These methods need high temperature (> 1000 o C).…”

Section: Introductionmentioning

confidence: 99%

PREPARATION OF Li1.5Al0.5Ge1.5(PO4)3 SOLID ELECTROLYTE BY SOL-GEL METHOD

Kotobuki

Hoshina

Isshiki

et al. 2011

Phosphorus Research Bulletin

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Li 1+x Al x Ge 2-x (PO 4 ) 3 (LAGP) solid electrolyte is one of the promising solid electrolytes for lithium ion batteries. The LAGP electrolyte was prepared by a sol-gel method. A gelation powder was calcined at 500 o C to obtain precursor powder for LAGP. The obtained powder was pelletized and calcined at 800, 850, and 900 o C. The pellets possessed NASICON structure, indicating that the LAGP was successfully prepared. The pellet calcined at 850 o C showed the highest lithium ion conductivity, 1.4×10 -4 S cm -1 , which is acceptable for all-solid-state lithium battery. Although some modification is still needed to improve the lithium ion conductivity of LAGP prepared by the sol-gel method, this finding provides us a new route for LAGP preparation.

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Na+ ion conductors of glass–ceramics in the system Na1+xAlxGe2−xP3O12(0.3≤x≤1.0)

Cited by 36 publications

References 23 publications

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

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

PREPARATION OF Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> SOLID ELECTROLYTE BY SOL-GEL METHOD

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Na+ ion conductors of glass–ceramics in the system Na1+xAlxGe2−xP3O12(0.3≤x≤1.0)

Cited by 36 publications

References 23 publications

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

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

PREPARATION OF Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> SOLID ELECTROLYTE BY SOL-GEL METHOD

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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