Enhanced cycling performance for all-solid-state lithium ion battery with LiFePO4 composite cathode encapsulated by poly (ethylene glycol) (PEG) based polymer electrolyte

Zeng, Huihui; Ji, Xiaoxiao; Tsai, Fang‐Chang; Zhang, Qunchao; Jiang, Tao; Li, Robert K.Y.; Shi, Hengchong; Luan, Shifang; Shi, Dean

doi:10.1016/j.ssi.2018.02.040

Cited by 46 publications

(29 citation statements)

References 59 publications

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“…Rigid, inorganic solid electrolytes (ceramics and glasses) have also been used to stabilize the lithium metal anode but are limited by high interfacial resistance and require large applied pressures 11 . In contrast, cells with polymer electrolytes and lithium metal anodes cycle with no applied pressure 12 . In spite of extensive studies 13,14 , the nature of the PEO-lithium interface is not well understood.…”

Section: Main Textmentioning

confidence: 99%

Dissolution of Lithium Metal in Poly(ethylene oxide)

et al. 2019

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Section: Main Textmentioning

confidence: 99%

Dissolution of Lithium Metal in Poly(ethylene oxide)

et al. 2019

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“…It is critical to establish an intimate interface between a cathode and a solid‐state electrolyte separator [6–8] . Meanwhile, effective Li‐ion and electronic conductive pathways are needed in a composite cathode [9–12] …”

Section: Introductionmentioning

confidence: 99%

Composite Cathodes with Succinonitrile‐Based Ionic Conductors for Long‐Cycle‐Life Solid‐State Lithium Metal Batteries

Xin

Wen

Xue

et al. 2021

Batteries & Supercaps

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Poor interfacial contacts between cathode active materials and solid‐state electrolytes in solid‐state lithium (Li) metal batteries often lead to a poor Li‐ion conductive pathway, and thus a short cycle life and a low energy density. In this work, we synthesized succinonitrile (SCN)‐based ionic conductors (ICs) with different flowability at room temperature for using in the composite cathodes and investigated the effect of the ICs on the cycle performance of the solid‐state Li metal batteries with a poly(vinylidene fluoride) (PVDF)‐based polymer electrolyte separator. Our results showed that the gel‐like SCN‐LiClO4 IC was superior to the flowable SCN‐LiTFSI [lithium bis(trifluoromethanesulfonyl)imide] IC and the rigid SCN‐LiClO4 IC. The gel‐like IC can build an effective Li‐ion conduction path in the cathodes, establish a stable cathode/electrolyte interface with a small interfacial resistance change during cycling, and allow a high mass loading of active materials, which enables a long cycle life and high energy density of solid‐state batteries.

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“…Compared with their liquid counterpart, polymer electrolytes cannot readily penetrate porous cathodes, often yielding higher interfacial resistances that impair fast charging/discharging procedures ( Bouchet et al., 2013 ; Cai et al., 2014a , 2014b ). Considering the development of high-performance but affordable polymer structures with excellent charge carrier transport properties, tailored design of electrode/electrolyte interfaces and interphases based on strategies derived from MD simulations, including detailed understanding of charge carrier transport dynamics and structural features, indeed constitutes a valid way toward future industrial application of invented polymer electrolytes ( Cai et al., 2014a , 2014b ; Zeng et al., 2018 ), as successfully demonstrated by the current case study of quasi-solid blend polymer electrolytes. Indeed, combining computational and experimental data, it is proposed that likely Li + traps comprising chemical moieties that potentially could strongly bind to Li + ion (such as, e.g., double-bonded oxygen atoms within the polymer backbone or side chains) should be avoided, particularly involving double-bonded oxygen atoms (such as C=O or SO 2 groups reflecting highly prominent units present in many recently reported polymer structures) ( Zhang et al., 2014a , 2014b ; Pan et al., 2015 ; Nguyen et al., 2018 ; Zhang et al., 2018 ; Li et al., 2018 ).…”

Section: Resultsmentioning

confidence: 71%

Small Groups, Big Impact: Eliminating Li+ Traps in Single-Ion Conducting Polymer Electrolytes

et al. 2020

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Summary Single-ion conducting polymer electrolytes exhibit great potential for next-generation high-energy-density Li metal batteries, although the lack of sufficient molecular-scale insights into lithium transport mechanisms and reliable understanding of key correlations often limit the scope of modification and design of new materials. Moreover, the sensitivity to small variations of polymer chemical structures (e.g., selection of specific linkages or chemical groups) is often overlooked as potential design parameter. In this study, combined molecular dynamics simulations and experimental investigations reveal molecular-scale correlations among variations in polymer structures and Li + transport capabilities. Based on polyamide-based single-ion conducting quasi-solid polymer electrolytes, it is demonstrated that small modifications of the polymer backbone significantly enhance the Li + transport while governing the resulting membrane morphology. Based on the obtained insights, tailored materials with significantly improved ionic conductivity and excellent electrochemical performance are achieved and their applicability in LFP||Li and NMC||Li cells is successfully demonstrated.

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Enhanced cycling performance for all-solid-state lithium ion battery with LiFePO4 composite cathode encapsulated by poly (ethylene glycol) (PEG) based polymer electrolyte

Cited by 46 publications

References 59 publications

Dissolution of Lithium Metal in Poly(ethylene oxide)

Dissolution of Lithium Metal in Poly(ethylene oxide)

Composite Cathodes with Succinonitrile‐Based Ionic Conductors for Long‐Cycle‐Life Solid‐State Lithium Metal Batteries

Small Groups, Big Impact: Eliminating Li+ Traps in Single-Ion Conducting Polymer Electrolytes

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