High-Performance Solid Composite Polymer Electrolyte for all Solid-State Lithium Battery Through Facile Microstructure Regulation

Yang, Jingjing; Wang, Xun; Gai, Zheng; Ma, Aibin; Chen, Weixing; Shao, Lang; Shen, Chao; Xie, Keyu

doi:10.3389/fchem.2019.00388

Cited by 37 publications

(39 citation statements)

References 27 publications

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“…Figure 3e summarizes the cycling performance and capacity retention of different PEO‐based electrolytes for Li|PEO‐based electrolyte|LiFePO 4 cells reported in the literature during the last two years (Table S3, Supporting Information). [ 29–31,36–46 ] Compared to other methods, our PEO‐based electrolytes are a simple and low‐cost way to make cells that work at both room temperature and lower temperature of 0 °C. Our Li|Homo‐SPE|LiFePO 4 cell presented good cycling performance (≈750 cycles) and high capacity retention (92.3%) at room temperature.…”

Section: Resultsmentioning

confidence: 99%

Homogeneous and Fast Ion Conduction of PEO‐Based Solid‐State Electrolyte at Low Temperature

Sun

et al. 2020

Adv Funct Materials

345

216

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Poly(ethylene oxide) (PEO)‐based electrolytes are promising for all‐solid‐state batteries but can only be used above room temperature due to the high‐degree crystallization of PEO and the intimate affinity between ethylene oxide (EO) chains and lithium ions. Here, a homogeneous‐inspired design of PEO‐based solid‐state electrolytes with fast ion conduction is proposed. The homogeneous PEO‐based solid‐state electrolyte with an adjusted succinonitrile (SN) and PEO molar ratio simultaneously suppresses the PEO crystallization and mitigates the affinity between EO and Li+. By adjusting the molar ratio of SN to PEO (SN:EO ≈ 1:4), channels providing fast Li+ transport are formed within the homogeneous solid‐state polymer electrolyte, which increases the ionic conductivity by 100 times and enables their application at a low temperature (0–25 °C), together with the uniform lithium deposition. This modified PEO‐based electrolyte also enables a LiFePO4 cathode to achieve a superior Coulombic efficiency (>99%) and have a long life (>750 cycles) at room temperature. Moreover, even at a low temperature of 0 °C, 82% of its room‐temperature capacity remains, demonstrating the great potential of this electrolyte for practical solid‐state lithium battery applications.

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Section: Resultsmentioning

confidence: 99%

Homogeneous and Fast Ion Conduction of PEO‐Based Solid‐State Electrolyte at Low Temperature

Sun

et al. 2020

Adv Funct Materials

345

216

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“…The transport of lithium ions in the polymer depends largely on the free movement of the chains in the amorphous phase. Therefore, as illustrated in Figure 7, the main purpose of introducing ceramic modifiers, whether active or inert, is to reduce the crystallinity of the polymer [21,76, 130–139] . For instance, in the work of Zhao et al., after adding LGPS (Li 10 GeP 2 S 12 ) powders into the PEO‐based electrolyte, the glass transition temperature ( T g ) reduced to −41.6∼−41.3 °C from −39.6 °C.…”

Section: Ceramic/polymer Composite Solid‐state Electrolytementioning

confidence: 99%

Designing Ceramic/Polymer Composite as Highly Ionic Conductive Solid‐State Electrolytes

Qian

Chen

et al. 2020

Batteries & Supercaps

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The design and fabrication of solid‐state electrolytes (SSEs) with high ionic conductivity is the most crucial obstacle for all‐solid‐state lithium batteries (ASSLBs). However, though polymer SSEs have the advantages of effective interfacial contact, polymer ASSLBs have not been able to deliver performance comparable to conventional lithium‐ion batteries (LIBs) due to slow ion transport within the polymer framework. In contrast, the high inherent ionic conductivity of ceramic SSEs is limited by the poor electrolyte/electrode interfacial contact. Therefore, the concept of ceramic/polymer composite electrolytes (C/PCEs) was proposed to combine the advantages of these two electrolytes and simultaneously overcome their weaknesses. This work reviews the recent progress in C/PCEs development according to the morphology of the ceramic components in C/PCEs. In this review, we investigate the inherent relationship between the structures of C/PCEs and the performance of the resultant SSEs, and subsequently conclude some general C/PCE design principles for future SSEs.

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“…Regarding the SPE, enough ionic conductivity in the order of 1 mS.cm −1 is obtained at 80 • C for PEO-based electrolyte (Devaux et al, 2012). PEO possesses mechanical properties and flexibility high enough to be processed by hot-pressing, extrusion, or solvent-casting methods to form of thin films ranging from 10 to 100 µm (Baudry et al, 1997;Porcarelli et al, 2016;Schnell et al, 2018;Yang et al, 2019). The goals being to minimize the SPE thickness to reduce ohmic loss and to increase the diffusion limited current density during battery operation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrode and Electrolyte Thicknesses on All-Solid-State Battery Performance Analyzed With the Sand Equation

et al. 2020

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The energy conversion and storage are great challenges for our society. Despite the progress accomplished by the Lithium(Li)-ion technology based on flammable liquid electrolyte, their intrinsic instability is the strong safety issue for large scale applications. The use of solid polymer electrolytes (SPEs) is an adequate solution in terms of safety and energy density. To increase the energy density (resp. specific energy) of the batteries, the positive electrode thickness must be augmented. However, as for Li-ion liquid electrolyte, the cationic transference number of SPEs is low, typically below 0.2, which limits their power performance because of the formation of strong gradient of concentration throughout the battery. Thus, for a given battery system a compromise between the energy density and the power has to be found in a rapid manner. The goal of this study is to propose a simple efficient methodology to optimize the thickness of the SPE and the positive electrode based on charge transport parameters, which allows to determine the effective limiting Li + diffusion coefficient. First, we rapidly establish the battery power performance thanks to a specific discharge protocol. Then, by using an approach based on the Sand equation a limiting current density is determined. A unique mother curve of the capacity as a function of the limiting current density is obtained whatever the electrode and electrolyte thicknesses. Finally, the effective limiting diffusion coefficient is estimated which in turn allows to design the best electrode depending on electrolyte thickness.

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High-Performance Solid Composite Polymer Electrolyte for all Solid-State Lithium Battery Through Facile Microstructure Regulation

Cited by 37 publications

References 27 publications

Homogeneous and Fast Ion Conduction of PEO‐Based Solid‐State Electrolyte at Low Temperature

Homogeneous and Fast Ion Conduction of PEO‐Based Solid‐State Electrolyte at Low Temperature

Designing Ceramic/Polymer Composite as Highly Ionic Conductive Solid‐State Electrolytes

Effect of Electrode and Electrolyte Thicknesses on All-Solid-State Battery Performance Analyzed With the Sand Equation

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