Li0.33La0.557TiO3 ceramic nanofiber-enhanced polyethylene oxide-based composite polymer electrolytes for all-solid-state lithium batteries

Zhu, Pei; Yan, Chaoyi; Dirican, Mahmut; Zhu, Jiadeng; Zang, Jun; Selvan, R. Kalai; Chung, Ching‐Chang; Jia, Hao; Li, Ya; Kiyak, Yasar; Wu, Nianqiang; Zhang, Xiangwu

doi:10.1039/c7ta10517g

Cited by 311 publications

(196 citation statements)

References 25 publications

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“…The solid electrolyte pellet with a composition of UIO/Li‐IL (15/16) was used for further studies, it shows a high conductivity of 3.2 × 10 −4 S cm −1 at 25 °C, and the activation energy calculated from the Arrhenius plot is about 0.4 eV, demonstrating a solid‐state conduction behavior. The conductivities of UIO/Li‐IL SEs are comparable to inorganic SEs (10 −4 S cm −1 ), while higher than those of polymer electrolytes (10 −6 –10 −4 S cm −1 ), other MOF‐derived SEs (10 −5 –10 −4 S cm −1 ), and covalent organic framework–derived SEs (10 −6 –10 −4 S cm −1 at 60 °C) …”

Section: Resultsmentioning

confidence: 86%

Nanostructured Metal–Organic Framework (MOF)‐Derived Solid Electrolytes Realizing Fast Lithium Ion Transportation Kinetics in Solid‐State Batteries

Guo

2019

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105

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Solid‐state batteries are hindered from practical applications, largely due to the retardant ionic transportation kinetics in solid electrolytes (SEs) and across electrode/electrolyte interfaces. Taking advantage of nanostructured UIO/Li‐IL SEs, fast lithium ion transportation is achieved in the bulk and across the electrode/electrolyte interfaces; in UIO/Li‐IL SEs, Li‐containing ionic liquid (Li‐IL) is absorbed in Uio‐66 metal–organic frameworks (MOFs). The ionic conductivity of the UIO/Li‐IL (15/16) SE reaches 3.2 × 10−4 S cm−1 at 25 °C. Owing to the high surface tension of nanostructured UIO/Li‐IL SEs, the contact between electrodes and the SE is excellent; consequently, the interfacial resistances of Li/SE and LiFePO4/SE at 60 °C are about 44 and 206 Ω cm2, respectively. Moreover, a stable solid conductive layer is formed at the Li/SE interface, making the Li plating/stripping stable. Solid‐state batteries from the UIO/Li‐IL SEs show high discharge capacities and excellent retentions (≈130 mA h g−1 with a retention of 100% after 100 cycles at 0.2 C; 119 mA h g−1 with a retention of 94% after 380 cycles at 1 C). This new type of nanostructured UIO/Li‐IL SEs is very promising for solid‐state batteries, and will open up an avenue toward safe and long lifespan energy storage systems.

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Section: Resultsmentioning

confidence: 86%

Nanostructured Metal–Organic Framework (MOF)‐Derived Solid Electrolytes Realizing Fast Lithium Ion Transportation Kinetics in Solid‐State Batteries

Guo

2019

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105

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“…For SPEs, appreciable ionic conductivity at room temperature (∼10 −3 –10 −4 S cm −1 ) is the key for the performance for commercial applications. In this paper, the impedance and ionic conductivities of salt‐free of PEO/PnBMA blends are discussed as a preliminary study of the SPE.…”

Section: Resultsmentioning

confidence: 99%

Thermal Properties and Morphology of Poly(ethylene oxide)/Poly(n‐butyl methacrylate) Blends

Ramli

Chan

Ali

2018

Macromolecular Symposia

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From the thermodynamic point of view, most of the high molar‐mass binary polymer blends are immiscible due to the entropic contribution to the free energy of mixing is relatively small. The miscibility of the systems on the molecular scale can be assessed by the thermal properties such as quantities of glass transition temperature (Tg) and change in heat capacity (ΔCp) of the polymers. For a semi‐crystalline polymer such as poly(ethylene oxide) (PEO), the crystallinity (X*) and the melting temperature (Tm) can also give some hints on the miscibility. Apart from the thermal properties, additional scientific findings such as morphology of the blends are needed as supplementary evidences to support the results. We focus on the PEO as the polymer host, blends with poly(n‐butyl methacrylate) (PnBMA) which were prepared using solution casting technique. Thermal properties of PEO/PnBMA polymer blends were investigated by modulated differential scanning calorimeter (MDSC) on the isothermal crystallized samples at 25 °C. Tg of PEO in the blends do not show significant variation with addition of PnBMA for entire composition range while for Tg of PnBMA in the blends, it is challenging to be estimated under the experimental condition due to the overlapping of the Tg of PnBMA and melting endotherm of PEO. Constancy of quantity Tg of PEO and ΔCp of PEO corresponding to the content of PEO in the blends suggest that PEO and PnBMA are immiscible for entire blend composition. X* and Tm of PEO in the blends show insignificant variation in PEO/PnBMA blends, when PEO as major component. This implies that these blends are immiscible under the experimental conditions as agreed with results of Tg and ΔCp. Spherulitic morphologies of PEO in the blends were studied by polarized optical microscopy (POM). PnBMA phase disperses randomly in PEO matrix when PEO in excess. The absence of significant change for the fibrillar spherulitic structures of PEO spherulites with addition of PnBMA (when PEO is the major component) suggests that immiscibility of PEO and PnBMA. Besides, the crystalline structure of PEO in PEO/PnBMA blends using X‐ray diffraction (XRD) reveals that the crystalline structure of PEO is not disturbed with the addition of PnBMA when PEO is in excess as the two distinct peaks of PEO do not shift as compared to neat PEO. Impedance spectroscopy (IS) studies show that the ionic conductivities (σDC) of the polymer blends at room temperature slightly increase with increasing of PEO with the order of magnitude of 10−11–10−10 S cm−1. This system serves as a potential polymer host as solid polymer electrolytes when added with inorganic salt.

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“…However, when large content of LLTO‐NWs was used, it was also detrimental to the ionic conductivities, because excessive addition of LLTO‐NWs resulted in the accumulation of LLTO‐NWs, which was not conductive to the migration of lithium ions. Second, the incorporation of appropriate LLTO‐NWs decreased the crystallinity and offered more efficacious contact with the PEO‐PPC blend, and a more amorphous region was obtained within the PEO, which was conducive to ion conduction . In addition, as a perovskite‐type lithium ion conductor, the surface region of LLTO‐NWs had many vacancies, so the lithium ions could hop along the vacancies in LLTO‐NWs by replacing a nearby vacancy .…”

Section: Resultsmentioning

confidence: 99%

High‐performance solid PEO/PPC/LLTO‐nanowires polymer composite electrolyte for solid‐state lithium battery

Zhu

Yao

et al. 2019

Int J Energy Res

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SUMMARY Solid polymer composite electrolyte (SPCE) with good safety, easy processability, and high ionic conductivity was a promising solution to achieve the development of advanced solid‐state lithium battery. Herein, through electrospinning and subsequent calcination, the Li0.33La0.557TiO3 nanowires (LLTO‐NWs) with high ionic conductivity were synthesized. They were utilized to prepare polymer composite electrolytes which were composed of poly (ethylene oxide) (PEO), poly (propylene carbonate) (PPC), lithium bis (fluorosulfonyl)imide (LiTFSI), and LLTO‐NWs. Their structures, thermal properties, ionic conductivities, ion transference number, electrochemical stability window, as well as their compatibility with lithium metal, were studied. The results displayed that the maximum ionic conductivities of SPCE containing 8 wt.% LLTO‐NWs were 5.66 × 10−5 S cm−1 and 4.72 × 10−4 S cm−1 at room temperature and 60°C, respectively. The solid‐state LiFePO4/Li cells assembled with this novel SPCE exhibited an initial reversible discharge capacity of 135 mAh g−1 and good cycling stability at a charge/discharge current density of 0.5 C at 60°C.

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Li_0.33La_0.557TiO₃ ceramic nanofiber-enhanced polyethylene oxide-based composite polymer electrolytes for all-solid-state lithium batteries

Abstract: A polyethylene oxide-based composite solid polymer electrolyte filled with one-dimensional ceramic Li0.33La0.557TiO3 nanofibers was designed and prepared.

Cited by 311 publications

References 25 publications

Nanostructured Metal–Organic Framework (MOF)‐Derived Solid Electrolytes Realizing Fast Lithium Ion Transportation Kinetics in Solid‐State Batteries

Nanostructured Metal–Organic Framework (MOF)‐Derived Solid Electrolytes Realizing Fast Lithium Ion Transportation Kinetics in Solid‐State Batteries

Thermal Properties and Morphology of Poly(ethylene oxide)/Poly(n‐butyl methacrylate) Blends

High‐performance solid PEO/PPC/LLTO‐nanowires polymer composite electrolyte for solid‐state lithium battery

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