Preparation of lithium ion conducting solid electrolyte of NASICON-type Li1+xAlxTi2−x(PO4)3 (x = 0.3) obtained by using the mechanochemical method and its application as surface modification materials of LiCoO2 cathode for lithium cell

Morimoto, Hideyuki; Awano, Hiroyuki; Terashima, Junpei; Shindo, Yohei; Nakanishi, Shinji; Ito, Nobukiyo; Ishikawa, Kiyotaka; Tobishima, Shin‐ichi

doi:10.1016/j.jpowsour.2013.05.039

Cited by 123 publications

(78 citation statements)

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“…[92,109] This composite cathode exhibited a high capacity (around1 80 mAh g À1 )a nd good cyclep erformance at ah igh charge cutoff potential of 4.5 V( vs. Li/Li + ) in the lithium cell. [92,109] This composite cathode exhibited a high capacity (around1 80 mAh g À1 )a nd good cyclep erformance at ah igh charge cutoff potential of 4.5 V( vs. Li/Li + ) in the lithium cell.…”

Section: Composite Cathodementioning

confidence: 97%

Synthesis and Properties of NaSICON‐type LATP and LAGP Solid Electrolytes

2019

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Inorganic solid electrolytes, in comparison with their liquid counterparts, have more potential in varioust ypes of batteries due to their dual roles of ion transportation and separation. For all-solid-state batteries, solide lectrolytes bring several advantages, [1][2][3][4][5][6] such as enhanced safety,i ncreased energy density,s olid device integration, and packaging;t hese expand the operation temperature range and potentially improve cycling stabilitya nd lifetime. Moreover,i norganic solid electrolytes are also beneficial for lithium-ion batteries and lithium-air batteries, in which they functiona se ither surface modification layers or lithium-ion conductors. [7,8] In principle, ideal solid electrolytes are expected to have several features: [9][10][11][12][13][14] 1) fast ion dynamics and negligible electronic conductivity (minimum ionic conductivity of 10 À4 Scm À1 at room temperature for practical consideration);2 )a wide electrochemical potential window for battery cycling;3 )ane xceptional mechanical strength to suppress lithium dendrite growth;4 )excellent thermal stability during the cycling processes;and 5) asimple and low cost synthetic process for large-scale applications.Generally,i norganic lithium superionic conductors are divided into three categories:o xides, sulfides, and phosphates. Suc-cessfule xamples in oxidesi nclude garnet oxides, [15,16] perovskite-type oxides, [17,18] and antiperovskite oxides. [19][20][21] Sulfide solid electrolytes include Li 2 SÀP 2 S 5 , [22,23] Li 3 PS 4 , [24][25][26] Li 7 P 3 S 11 , [27,28] Li 7 PS 6 ,a nd Li 6 PS 5 X( X = Cl, Br). [29][30][31] Popular phosphate solid electrolytes include sodium superionic conductor (NaSICON)structured lithium-ion conductors, [32][33][34][35][36] such as LiTi 2 (PO 4 ) 3 (LTP), Li 1 + x Al x Ti 2Àx (PO 4 ) 3 (LATP), and Li 1 + x Al x Ge 2Àx (PO 4 ) 3 (LAGP). Many exciting discoveries of these materials have been summarized in important review papers. [2,6,[37][38][39][40] NaSICON-type solid electrolytes, such as LATP and LAGP, have marked advantages compared with sulfides and oxides: they display chemicals tabilityi na ir and/or water,a re low cost and low toxicity,a nd have great electrochemical stability with the added benefito fe asy preparation. [2,36,38] They also exhibit attractive ionic conductivities of 10 À4 -10 À3 Scm À1 at room temperature. Such features have recently caused renewed interest in these NaSICON-structured materials and much effort has been devoted to the investigation of this type of solid electrolyte, especiallyL ATPa nd LAGP.T his manuscript reviewsr ecent progress in LATP and LAGP solid electrolytes, with as pecific focus on synthetic approaches and their effects on the crystal structures, conductive properties, and applications. Herein, general synthetic methods for LATP and LAGP solid electrolytes are first introduced, followed by ac omparison of the crystal structures, phase purities, and ionic conductivities that result from different approaches. Later,t he applications of LATP and LAGP in ful...

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Section: Composite Cathodementioning

confidence: 97%

Synthesis and Properties of NaSICON‐type LATP and LAGP Solid Electrolytes

2019

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“…Great efforts have www.frontiersin.org been made for maximizing the ionic conductivity of LiA 2 IV (PO 4 ) 3 systems, especially LiTi 2 (PO 4 ) 3 . An increase in conductivity was observed when Ti 4+ was partially substituted by Al 3+ in Li 1+x Al x Ti 2−x (PO 4 ) 3 (LATP) (Key et al, 2012;Duluard et al, 2013;Morimoto et al, 2013) or when P 5+ was substituted by Si 4+ in Li 1+x+y Al x Ti 2−x Si y P 3−y O 12 (Fu, 1997;Tan et al, 2012). Conductivity was enhanced significantly to 3 × 10 −3 S cm −1 for Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 at room temperature.…”

Section: Nasicon-type Electrolytesmentioning

confidence: 99%

Recent Advances in Inorganic Solid Electrolytes for Lithium Batteries

et al. 2014

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The review presents an overview of the recent advances in inorganic solid lithium ion conductors, which are of great interest as solid electrolytes in all-solid-state lithium batteries. It is focused on two major categories: crystalline electrolytes and glass-based electrolytes. Important systems such as thio-LISICON Li 10 SnP 2 S 12 , garnet Li 7 La 3 Zr 2 O 12 , perovskite Li 3x La (2/3) x TiO 3 , NASICON Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , and glass-ceramic xLi 2 S·(1 − x )P − 2 S 5 and their progress are described in great detail. Meanwhile, the review discusses different ongoing strategies on enhancing conductivity, optimizing electrolyte/electrode interface, and improving cell performance.

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“…More recently, various effective synthesis methods have been tried to prepare LATP with superior electrochemical properties; these methods include meltquenching [3][4][5], sol-gel [6][7][8][9][10][11], mechanical milling [12,13], and co-precipitation [14][15][16] techniques. Moreover, actual electrolytes using LATPs have been seen in many earlier examples of lithiumion [17][18][19][20][21][22], Li-air [23,24], and Li-sulfur batteries [25]. For more information, Table 1 summarizes the LATP examples [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]26] prepared by various synthetic methods to obtain various values of room-temperature (RT) ionic conductivity (s) and activation energy (E a ), including the reported ionic conductivities (s b and s g ) and activation energies (E b and E g ) in both phases of bulk and grain boundary.…”

Section: Introductionmentioning

confidence: 99%