Hybrid lithium salts regulated solid polymer electrolyte for high-temperature lithium metal battery

Zhang, Yu-Hang; Lu, Mei-Na; Li, Qian; Shi, Fa‐Nian

doi:10.1016/j.jssc.2022.123072

Cited by 29 publications

(14 citation statements)

References 40 publications

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“…The increases can be attributed to the promotion of the segmental motion within the system at elevated temperatures, which has been explained in accordance with the well-known Arrhenius model and the Vogel−Tammann−Fulcher (VTF) model. 1,15,34,37,38 The segmental motion leads to an expansion in the free volume of the system, providing a pathway for their movements, which in turn facilitates the movement of the lithium salts in the PEO chains. It should be noted that our discussion primarily focuses on temperatures that are below the glass transition temperature of PS (T g = 103 °C).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Solvent-Tailored Reversible Self-Assembly: Unveiling Ionic Transport Nanochannels in Block Copolymer Composite Electrolytes

Tseng,

Liao,

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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Block copolymer composite electrolytes have gained extensive attention for their promising performance in ionic conductivity and mechanical properties, making them valuable for future technologies. The control of the ionic conductivity through the self-assembly of block copolymers, however, remains a great challenge, especially in confined environments. In this study, we prepare block copolymer composite electrolytes using polystyrene-block-poly(ethylene oxide) (PS-b-PEO, SEO) as the polymer matrix and anodic aluminum oxide (AAO) templates as the ceramic skeleton. The self-assembly of SEO creates nanoscale ion transport pathways in the PEO regions through ionic interactions with lithium salts. The nanopores of the AAO templates provide a confined environment for complex phase separation of SEO controlled by selective solvent vapor annealing. Our findings demonstrate that transforming selfassembled SEO structures allows for precise control of ion transport pathways with cylindrical structures exhibiting 20 times higher ionic conductivities than those of helical structures. For AAO

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Section: ■ Results and Discussionmentioning

confidence: 99%

Solvent-Tailored Reversible Self-Assembly: Unveiling Ionic Transport Nanochannels in Block Copolymer Composite Electrolytes

Tseng,

Liao,

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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“…In the context of PEO, distinct blend polymers also assume distinct functional roles. Shi and Zhang [68] prepared a blending SPE composed of PEO and poly(vinylidene fluoride) (PVDF), and the assembled Li j j LiFePO 4 solid cells can reach a specific capacity of 160 mAh g À 1 with an ionic conductivity of 9.12×10 À 5 S cm À 1 at 60 °C and t Li þ of 0.66. It can be seen from Figure 3a that the addition of rigid polymer into a soft matrix can effectively enhance the mechanical strength to resist the dimensional loss at high temperature, and the mixture Li salts can improve the electrochemical properties.…”

Section: Polyether Electrolytesmentioning

confidence: 99%

“…The PVDF has received more attentions due to good electrochemical stability and high ɛ (~8.4), [100] which can offer high dissolution ability of lithium salts and provide high concentration of charge carriers. [68,101] However, it is hard to act as suitable polymer electrolyte with high ionic conductivity due to PVDF is the semi-crystalline polymer. [102] The functional monomer and group adjustment has been introduced to increase the ionic conductivity.…”

Section: Polyvinylidene Fluoride Electrolytesmentioning

confidence: 99%

Polymeric Electrolytes for Solid‐state Lithium Ion Batteries: Structure Design, Electrochemical Properties and Cell Performances

Su,

Zhang,

Xiao

et al. 2023

ChemSusChem

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The solid‐state electrolytes are keys to achieve high energy, safety and stability for lithium ion batteries. In this review, core indicators of solid polymer electrolytes are discussed in detail including ionic conductivity, interface compatibility, mechanical integrity and cycling stability. Besides, we have also summarized how above properties can be improved by the design strategy of functional monomers, groups and assembly of batteries. Structures and properties of polymers are investigated here to provide a basis for all‐solid‐state electrolyte design strategies of multi‐component polymers. Meanwhile, adjustment strategies of quasi‐solid‐state polymer electrolytes such as adding functional additives and carrying out structural design have also been investigated, aiming at solving problems caused by simply adding liquids or small molecular plasticizer. We hope that fresh and established researchers can achieve a general perspective of solid polymer electrolytes via this review, and spur more extensive interests for exploration of high‐performance lithium ion batteries.

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“…Polymer-based ASSBs are an attractive battery technology due to the relative ease and flexibility of manufacturing, as already demonstrated by the Blue Solutions group. , Indeed, the past decade has seen a resurgence of SPE research for application in Li metal batteries, ,− with many of the studies involving the archetypal polyether based systems − and others based on a polycarbonate polymer matrix into which the lithium salt is dissolved. , Polymers prepared from polymerizable ionic liquids have also been shown to be good polymer hosts for alkali metal salts, with and without the presence of an ionic liquid cosolvent. − A key challenge with all of these SPE systems is the difficulty in simultaneously achieving high ionic conductivity and high electrochemical stability, while preserving good mechanical stability. A recent approach to address this is the design of block copolymers whereby a more rigid, ionophobic polymer is copolymerized with another polymer block, such as an archetypal polyether-based systems, into which the lithium salt is dissolved.…”

Section: Introductionmentioning

confidence: 99%

Solid State Li Metal/LMO Batteries based on Ternary Triblock Copolymers and Ionic Binders

Forsyth

Makhlooghiazad

Mendes

et al. 2023

ACS Appl. Energy Mater.

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Triblock copolymers containing an ionophilic polymerized ionic liquid block, sandwiched between two ionophobic polystyrene blocks, were investigated as solid polymer electrolytes (SPE) to simultaneously provide mechanically robust, free-standing membranes with high lithium conductivity and an optimized electrolyte composition. The conductivity reached 8 × 10–5 S cm–1 and 6.5 × 10–4 S cm–1 at 30 and 80 °C, respectively, with an anodic stability above 4.5 V. Highly stable Li metal symmetric cycling was demonstrated, with an overpotential of 130 mV for over 300 h at 50 °C at a current density of 0.5 mA cm–2/0.5 mAh cm–2. Attempts were also made to incorporate the SPE as the binder in an LMO cathode formulation. The best cell performance, however, was obtained when substituting the SPE in the LMO cathode formulation with a PMA solid-state gel electrolyte, resulting in a high-performance solid-state Li|polymer eletrolyte|LMO device with stable cycling at C/5, and an impressive capacity retention (i.e., 105 mAh g–1 after 150 cycles at 0.1 mA cm–2) with a Coulombic efficiency around 99.4%.

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Hybrid lithium salts regulated solid polymer electrolyte for high-temperature lithium metal battery

Cited by 29 publications

References 40 publications

Solvent-Tailored Reversible Self-Assembly: Unveiling Ionic Transport Nanochannels in Block Copolymer Composite Electrolytes

Solvent-Tailored Reversible Self-Assembly: Unveiling Ionic Transport Nanochannels in Block Copolymer Composite Electrolytes

Polymeric Electrolytes for Solid‐state Lithium Ion Batteries: Structure Design, Electrochemical Properties and Cell Performances

Solid State Li Metal/LMO Batteries based on Ternary Triblock Copolymers and Ionic Binders

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