Progress on High Voltage PEO-based Polymer Solid Electrolytes in Lithium Batteries

Hou, Wenhui; Ou, Yu; Li, Kai

doi:10.1007/s40242-022-2065-2

Cited by 15 publications

(11 citation statements)

References 85 publications

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“…23,24 With the increasing demand for battery energy density, increasing attention has been paid to the electrochemical stability of electrolytes (organic liquid electrolytes, gel electrolytes, and solid electrolytes). [25][26][27][28] The ESW affects the choice of associated electrode system. SPEs with wider ESW usually have higher electrochemical stability.…”

Section: Introductionmentioning

confidence: 99%

“…As shown in Figure 1, 1238 studies (including experiments and reviews) on the ESW of electrolytes have been summarized and clustered since 2000 23,24 . With the increasing demand for battery energy density, increasing attention has been paid to the electrochemical stability of electrolytes (organic liquid electrolytes, gel electrolytes, and solid electrolytes) 25–28 . The ESW affects the choice of associated electrode system.…”

Section: Introductionmentioning

confidence: 99%

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Challenges of polymer electrolyte with wide electrochemical window for high energy solid‐state lithium batteries

Huo

Sheng

Xue

et al. 2023

InfoMat

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With the rapid development of energy storage technology, solid‐state lithium batteries with high energy density, power density, and safety are considered as the ideal choice for the next generation of energy storage devices. Solid electrolytes have attracted considerable attention as key components of solid‐state batteries. Compared with inorganic solid electrolytes, solid polymer electrolytes have better flexibility, machinability, and more importantly, better contact with the electrode, and low interfacial impedance. However, its low ionic conductivity, narrow electrochemical stability window (ESW), and poor mechanical properties at room temperature limit its development and practical applications. In recent years, many studies have focused on improving the ionic conductivity of polymer electrolytes; however, few systematic studies and reviews have been conducted on their ESWs. A polymer electrolyte with wide electrochemical window will aid battery operation at a high voltage, which can effectively improve their energy density. Moreover, their stability toward lithium metal anode is also important. Therefore, this review summarizes the recent progress of solid polymer electrolytes on the ESW, discusses the factors affecting ESW of polymer electrolytes, and analyzes a strategy to broaden the window from the perspective of molecular interaction, polymer structural design, and interfacial tuning. The development trends of polymer electrolytes with wide electrochemical windows are also presented.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Challenges of polymer electrolyte with wide electrochemical window for high energy solid‐state lithium batteries

Huo

Sheng

Xue

et al. 2023

InfoMat

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“…At present, solid electrolytes used for the development of all-solid-state lithium batteries can be mainly classified into solid-state inorganic electrolytes and solid-state polymer electrolytes (SPEs). Despite exhibiting high ionic conductivities (10 –4 to 10 –2 S cm –1 ), the practical application of inorganic solid electrolytes is hindered by their fragility and severe interfacial impedance. , In contrast, polymer electrolytes, like poly(vinylidene fluoride) (PVDF) and poly(ethylene oxide) (PEO), are very promising, relying on their high flexibility, low interfacial impedance with electrode materials, good film-forming properties, and low cost. − Among them, PEO is the most commonly used polymer matrix. However, it has not yet been applied in practice due to its low ion conductivity at room temperature and poor interfacial performance with the electrode. ,, …”

Section: Introductionmentioning

confidence: 99%

“…Despite exhibiting high ionic conductivities (10 −4 to 10 −2 S cm −1 ), the practical application of inorganic solid electrolytes is hindered by their fragility and severe interfacial impedance. 17,18 In contrast, polymer electrolytes, like poly(vinylidene fluoride) (PVDF) and poly(ethylene oxide) (PEO), are very promising, relying on their high flexibility, low interfacial impedance with electrode materials, good film-forming properties, and low cost. 19−21 Among them, PEO is the most commonly used polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework-Coated Fiber Network Enabling Continuous Ion Transport in Solid Lithium Metal Batteries

Zhao

Zhang

Niu

et al. 2023

Ind. Eng. Chem. Res.

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Poly(ethylene oxide) (PEO)-based solid-state polymer electrolytes (SPEs) have limited application in lithium metal batteries due to their low room-temperature ionic conductivity and high interfacial impedance with electrodes. Constructing efficient enhancers is a promising way to tackle these critical issues, but still remains a huge challenge. In this study, a continuous and hierarchical lithium-ion transport network was constructed by growing a copper-based metal–organic framework (MOF) (Cu–MOF-74) on a three-dimensional (3D) nonwoven fabric (NWF). The incorporation of the high-surface-area NWF effectively prevents MOF particle agglomeration, thereby creating a 3D interconnected network of ion transportation channels that span both vertically and laterally. Additionally, MOF nanoparticles with functional groups exhibit a high affinity toward bis(tri-fluoromethanesulfonyl) imide anions, which is facilitated by hydrogen bonding between oxygen-containing functional groups and fluorine, as well as metal–oxygen bonds, releasing more free lithium ions. The as-prepared electrolyte exhibits a fast ionic conductivity of 1.0 × 10–4 S cm–1 at 30 °C, a high lithium-ion transference number of 0.39, and a wide electrochemical window of 4.9 V. The all-solid-state Li–LiFePO4 cells possess a high initial discharge capacity of 160.4 mAh g–1 at 0.5C, excellent rate performance (specific capacity reached 148.6 mAh g–1 at 2.0C), and good cycle stability. This approach presents a cost-effective and efficient strategy for enhancing PEO-based SPEs, providing a promising direction for overcoming the challenge of low ionic conductivity in all-solid-state lithium metal batteries.

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“…However, the extreme reactivity of metallic lithium leads to complex parasite reactions and imbalanced Li deposition/dissolution, causing fast degradation of battery performance and safety risks. − Due to the low electrode potential of Li, electrolyte solvents can be reduced on the surface to induce the rapid formation of a layer of solid-electrolyte-interphase (SEI) film. The difficulty of stabilizing the SEI on Li anode is a crucial problem for the performance and safety of lithium–metal batteries because a nonuniform and unstable SEI film can break as the cycling proceeds to cause cycling stability and safety problems associated with the formation of lithium dendrite. , To address this issue, solid-state-electrolytes (SSEs) have attracted tremendous interest for their special advantages such as nonvolatility, nonflammability, high mechanical strength, and the ability to further increase the energy density of batteries. − Particularly, polymer electrolytes as an important member of SSE family are a potential candidate for lithium–metal-batteries because they have many positive features such as an easier fabrication and a stable chemistry with lithium and air. − Quasi-solid lithium metal batteries therefore have been considered a potential option for next generation energy storage. − Since 1973, when poly(ethylene oxide)(PEO) was found to be able to dissolve alkali metal salts and turn into ionic conductive, enormous studies have been carried out upon the modification of PEO as an SSE. − However, the ionic conductivity of PEO at room temperature remains at 10 –8 –10 –4 S cm –1 , which is far from enough for the use of lithium–metal batteries. Therefore, gel polymer electrolytes (GPEs) have been developed, in which a small amount of plasticizer (generally liquid electrolyte) is absorbed by the polymer skeleton and forms an ion-conductive gel.…”

Section: Introductionmentioning

confidence: 99%

Lithiated Phosphoryl Cellulose Nanocrystals Enhance Cycling Stability and Safety of Quasi-Solid-State Lithium Metal Batteries

Cui,

Xiao,

Cui

et al. 2023

ACS Appl. Mater. Interfaces

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Cycling stability and safety are two of the main challenges facing lithium metal batteries with metallic lithium as anodes. Quasi-solid-state lithium metal batteries based on gel polymer electrolytes are one of the important development directions for lithium metal batteries addressing those challenges. Herein, we prepare lithiated phosphoryl cellulose nanocrystals (PCNC-Li) as a modification material for poly(vinylidene fluoride) (PVDF) gel polymer electrolyte to improve cycling stability and safety of quasi-solid-state lithium metal batteries. The synthesized PCNC-Li tends to form a uniform network structure on the surface of the PVDF membrane, in which the phosphoryl groups grafted regularly on celluloses can regulate the transport of lithium ions. As a result, a more uniform ion flux and more stable lithium anode interface support an obviously improved cycling stability for lithium metal batteries. Moreover, the introduction of the PCNC-Li coating layer makes the modified PVDF membranes have a better thermal stability and an enhanced mechanical strength, which is beneficial for improvement of safety of lithium metal batteries. This work provides a new alternative to fabricating a better composite gel polymer electrolyte for lithium metal batteries.

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Progress on High Voltage PEO-based Polymer Solid Electrolytes in Lithium Batteries

Cited by 15 publications

References 85 publications

Challenges of polymer electrolyte with wide electrochemical window for high energy solid‐state lithium batteries

Challenges of polymer electrolyte with wide electrochemical window for high energy solid‐state lithium batteries

Metal–Organic Framework-Coated Fiber Network Enabling Continuous Ion Transport in Solid Lithium Metal Batteries

Lithiated Phosphoryl Cellulose Nanocrystals Enhance Cycling Stability and Safety of Quasi-Solid-State Lithium Metal Batteries

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