Hybrid Electrolytes with Controlled Network Structures for Lithium Metal Batteries

Pan, Qiwei; Smith, Derrick M.; Qi, Hao; Wang, Shijun; Li, Christopher Y.

doi:10.1002/adma.201502059

Cited by 316 publications

(222 citation statements)

References 44 publications

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“…14 A similar cross-linked material between polyhedral oligomeric silsesquioxane (POSS) and poly(ethylene glycol) was synthesized by Li and co-workers. 15 This material has a C d (total charge passed at cell failure in a galvanostatic cycling test) of 2800 C cm –2 at J = 0.3 mA cm –2 . These two examples are believed to be the state-of-the-art of Li dendrite suppression for solid polymer electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance

Zheng

Khurana

et al. 2016

Chem. Sci.

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Section: Introductionmentioning

confidence: 99%

Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance

Zheng

Khurana

et al. 2016

Chem. Sci.

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“…Unfortunately, the ionic conductivity of these solids is often below 10 − 5 S/cm at room temperature [22]. In an important study, Pan et al developed a series of crosslinked polymer electrolytes using PEO as the conducting polymer and polyhedral oligomeric silsesquioxane (POSS) as the crosslinker [19]. Through a one-step thermally activated reaction between octakis (3-glycidyloxypropyldimethylsiloxy)octasilsesquioxane (octa-POSS) and amine-terminated PEO in the presence of LiTFSI, electrolytes with ionic conductivity higher than 10 − 5 S/cm at 30°C, and close to 10 − 3 S/cm at 90°C, were produced.…”

Section: Introductionmentioning

confidence: 99%

“…We present data on two types of crosslinked PFPEs: thermally crosslinked POSS-based PFPE electrolytes inspired by Pan et al [19] and UV crosslinked solids inspired by the work of Williams et al [42] The POSS-based system was obtained by reacting acrylate-functionalized POSS with PFPE. We show that crosslinking increases the solubility of LiTFSI in PFPE-based solids (both POSS and UV crosslinked systems).…”

Section: Introductionmentioning

confidence: 99%

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Crosslinked perfluoropolyether solid electrolytes for lithium ion transport

et al. 2017

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A B S T R A C TPerfluoropolyethers (PFPE) are commercially available non-flammable short chain polymeric liquids. Endfunctionalized PFPE chains solvate lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt and these mixtures can be used as electrolytes for lithium (Li) batteries. Here we synthesize and characterize a new class of solid PFPE electrolytes. The electrolytes are made by either thermal or UV crosslinking PFPE chains with urethane methacrylate end-groups. For the synthesis of thermally crosslinked electrolytes, polyhedral oligomeric silsesquioxane (POSS) with organic acrylopropyl groups was used as crosslinker agent, while for UV cured electrolytes a photoinitiatior was used. We present thermal, morphological, and electrical data of the solid electrolytes. We compare these properties with those of the two parent liquids (PFPE with urethane methacrylate end-groups and POSS with acrylopropyl groups) mixed with LiTFSI. The solubility limit of LiTFSI in the PFPE-based solids is higher than that in the liquids. The conductivity data are analyzed using the Vogel-Tamman-Fulcher equation. The concentration of effective charge carriers is a strong function of the nature of the solvent (solid versus liquid) whereas the activation energy is neither a strong function of the nature of the solvent nor salt concentration.

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“…Among the different types of solid-state electrolytes (inorganic oxides/nonoxides and Li salt-contained polymers), solid-state polymer electrolytes have been the most extensively studied (15)(16)(17)(18)(19)(20)(21). Polyethylene oxide (PEO)-based composite electrolytes have attracted the most interest (22,23).…”

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confidence: 99%

Flexible, solid-state, ion-conducting membrane with 3D garnet nanofiber networks for lithium batteries

Gong

Dai

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

820

516

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Beyond state-of-the-art lithium-ion battery (LIB) technology with metallic lithium anodes to replace conventional ion intercalation anode materials is highly desirable because of lithium's highest specific capacity (3,860 mA/g) and lowest negative electrochemical potential (∼3.040 V vs. the standard hydrogen electrode). In this work, we report for the first time, to our knowledge, a 3D lithium-ion-conducting ceramic network based on garnet-type Li 6.4 La 3 Zr 2 Al 0.2 O 12 (LLZO) lithium-ion conductor to provide continuous Li + transfer channels in a polyethylene oxide (PEO)-based composite. This composite structure further provides structural reinforcement to enhance the mechanical properties of the polymer matrix. The flexible solid-state electrolyte composite membrane exhibited an ionic conductivity of 2.5 × 10 −4 S/cm at room temperature. The membrane can effectively block dendrites in a symmetric Li j electrolyte j Li cell during repeated lithium stripping/plating at room temperature, with a current density of 0.2 mA/cm 2 for around 500 h and a current density of 0.5 mA/cm 2 for over 300 h. These results provide an all solid ion-conducting membrane that can be applied to flexible LIBs and other electrochemical energy storage systems, such as lithium-sulfur batteries.solid-state electrolyte | 3D garnet nanofibers | polyethylene oxide | ionic conductor | flexible membrane H igh capacity, high safety, and long lifespan are three of the most important key factors to developing rechargeable lithium batteries for applications in portable electronics, transportation (e.g., electrical vehicles), and large-scale energy storage systems (1-5). Based on state-of-the-art lithium-ion battery (LIB) technology, metallic lithium anode is preferable to replace conventional ion intercalation anode materials because of the highest specific capacity (3,860 mAh/g) of lithium and the lowest negative electrochemical potential (∼3.040 V vs. the standard hydrogen electrode), which can maximize the capacity density and voltage window for increased battery energy density (1). Moreover, the success of beyond LIBs, such as lithium-sulfur and lithium-oxygen, will strongly rely on lithium metal anode designs with good stability to achieve their targeted goals of high energy density and long cycle life.Using lithium metal in organic liquid electrolyte systems faces many challenges in terms of battery performance and safety. For example, lithium-sulfur batteries suffer from the dissolution of intermediate polysulfides in the organic electrolyte that causes severe parasitic reactions on lithium metal surfaces, leading to lithium metal degradation and low lithium cycling efficiency (6). Lithium-oxygen batteries have the challenge of chemically instable liquid electrolytes on the oxygen electrode that cause limited battery cycling (7). All of these challenges are associated with the use of lithium metal in liquid electrolyte battery systems. Another major associated challenge is lithium dendrite growth on lithium metal anodes, which causes int...

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Hybrid Electrolytes with Controlled Network Structures for Lithium Metal Batteries

Cited by 316 publications

References 44 publications

Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance

Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance

Crosslinked perfluoropolyether solid electrolytes for lithium ion transport

Flexible, solid-state, ion-conducting membrane with 3D garnet nanofiber networks for lithium batteries

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