A Flexible Solid Composite Electrolyte with Vertically Aligned and Connected Ion-Conducting Nanoparticles for Lithium Batteries

Zhai, Haowei; Xu, Pengyu; Ning, Mingqiang; Cheng, Qin; Mandal, Jyotirmoy; Yang, Yuan

doi:10.1021/acs.nanolett.7b00715

Cited by 411 publications

(335 citation statements)

References 53 publications

(89 reference statements)

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“…For example, the Young's modulus of vermiculite sheets is as high as 175 GPa, [49] which is sufficient to suppress the growth of Li dendrite by mechanical resistance. [2,24,35,37,[50][51][52] The tensile strength of SPE is doubled from 0.41 to 0.8 MPa after adding VS fillers (Figure 2c). Nanoindentation is an effective technique to evaluate materials' mechanical properties under indent at nanoscale and can mimic the punctuation of Li dendrites.…”

Section: Resultsmentioning

confidence: 99%

“…[25][26][27][28][29][30][31] Controlling the size of the fillers is definitely important as it is related to the effective fillerpolymer interaction interface area. [3,10,[34][35][36] Compared to nanoparticles and nanowires, using 2D fillers for SPE was rarely reported. It is reported that aligned nanoparticles and nanowires in solid composite electrolytes could enhance the ionic conductivity than randomly dispersed fillers.…”

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confidence: 99%

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Simultaneously Enhancing the Thermal Stability, Mechanical Modulus, and Electrochemical Performance of Solid Polymer Electrolytes by Incorporating 2D Sheets

Tang

Zhang

et al. 2018

Advanced Energy Materials

238

178

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Solid state electrolytes are the key components for high energy density lithium ion batteries and especially for lithium metal batteries where lithium dendrite growth is an inevitable obstacle in liquid electrolytes. Solid polymer electrolytes based on a complex of polymers and lithium salts are intrinsically advantageous over inorganic electrolytes in terms of processability and film‐forming properties. But other properties such as ionic conductivity, thermal stability, mechanical modulus, and electrochemical stability need to be improved. Herein, for the first time, 2D additives using few‐layer vermiculite clay sheets as an example to comprehensively upgrade poly(ethylene oxide)‐based solid polymer electrolyte are introduced. With clay sheet additives, the polymer electrolyte exhibits improved thermal stability, mechanical modulus, ionic conductivity, and electrochemical stability along with reduced flammability and interface resistance. The composite polymer electrolyte can suppress the formation and growth of lithium dendrites in lithium metal batteries. It is anticipated that the clay sheets upgraded solid polymer electrolyte can be integrated to construct high performance solid state lithium ion and lithium metal batteries with higher energy and safety.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Simultaneously Enhancing the Thermal Stability, Mechanical Modulus, and Electrochemical Performance of Solid Polymer Electrolytes by Incorporating 2D Sheets

Tang

Zhang

et al. 2018

Advanced Energy Materials

238

178

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“…[35] Cui's group synthesized polyacrylonitrile (PAN)-LLTO HSSE using electro-spinningL LTOnanowires. [36] The verticallya ligneds tructure offers direct channels for lithium ion transport, resultingi ns uperior ionic conductivity of 0.52 10 À4 Scm À1 at room temperature, which is 3.6 times that of HSSE with randomly blended LATP nanowires.I no rder to provide continuous ionic conductive pathway,3 Dn etwork of inorganic electrolytes have attracted increasinga ttention.H ua nd co-workersf abricateda3D Li 6.4 La 3 Zr 2 Al 0.2 O 12 (LLZO)n anofiber network by electrospinning and high temperature annealing. Later,t he same group reported that HSSE with aligned LLTO nanowires exhibits one order of magnitude higheri onic conductivity than that with randomly aligned nanowires as displayed in Figure 4a and b.…”

Section: Composite Polymer-inorganic Hssesmentioning

confidence: 98%

Recent Progress of Hybrid Solid‐State Electrolytes for Lithium Batteries

Liu

et al. 2018

Chemistry A European J

132

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Conventional liquid electrolytes for lithium batteries usually suffer from irreversible decomposition and safety concerns. Solid state electrolytes (SSEs) have been considered as the key for advanced lithium batteries with improved energy density and safety, whereas challenges remain for polymer and inorganic SSEs. Recently, hybrid solid-state electrolytes (HSSEs) that integrate the merits of different electrolyte systems have been under intensive study. Herein, we summarize the recent progress of HSSEs with different compositions and structures. The design principle of each type of HSSEs are discussed, as well as their ionic conducting mechanism, electrochemical performance and effects of compositional/structural control. Finally, challenges and perspectives are provided for the future development of HSSEs and solid-state lithium batteries.

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“…Lei et al synthesized LATP (x = 0.3) from as olutionm ethod and then prepared composite electrolyte materials (CEM) with LATP and poly(vinylidene fluoride) (PVDF) in differentr atios. [103] Reproducedw ith permission from:L iu et al ACS Appl. Photographs showing the flexibility of the LATP composite electrolyte film:a)LATP@PEGDA@PDMS (PEGDA = poly(ethyleneglycol) diacrylate, PDMS = poly(dimethylsiloxane)); [104] b) LATP@PVDF composite electrolyte, [87] c) LATP@PEO,a nd d) Ice-templating process for the preparationo ft he LATP@PEO composite electrolyte.…”

Section: Composite Solid Electrolytementioning

confidence: 99%

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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A Flexible Solid Composite Electrolyte with Vertically Aligned and Connected Ion-Conducting Nanoparticles for Lithium Batteries

Cited by 411 publications

References 53 publications

Simultaneously Enhancing the Thermal Stability, Mechanical Modulus, and Electrochemical Performance of Solid Polymer Electrolytes by Incorporating 2D Sheets

Simultaneously Enhancing the Thermal Stability, Mechanical Modulus, and Electrochemical Performance of Solid Polymer Electrolytes by Incorporating 2D Sheets

Recent Progress of Hybrid Solid‐State Electrolytes for Lithium Batteries

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

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