4.2 ​V poly(ethylene oxide)-based all-solid-state lithium batteries with superior cycle and safety performance

Lu, Jiaze; Zhou, Junhua; Chen, Rusong; Fang, Fei; Nie, Kaihui; Qi, Wei; Zhang, Jie-Nan; Yang, Ruizhi; Yu, Xiqian; Li, Hong; Chen, Liquan; Huang, Xuejie

doi:10.1016/j.ensm.2020.07.026

Cited by 90 publications

(78 citation statements)

References 35 publications

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“…[ 69 ] The cathode materials are most active in the charged state and, if SPEs are chemically unstable, can catalyze SPE decomposition. [ 14,70 ]…”

Section: Criteria For Spesmentioning

confidence: 99%

“…[ 15,202–205 ] However, the main focus of such a battery still needs to be on its safety and stability. [ 70,206 ] High‐voltage or high‐capacity cathode materials are always accompanied by exothermic interfacial reactions. [ 207–209 ] Uneven ion transport at the Li metal anode interface can cause electrolyte polarization and interfacial instability, which are also the main reasons for capacity decay and compromised battery safety.…”

Section: Typical Applications Of Spesmentioning

confidence: 99%

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Solid Polymer Electrolytes with High Conductivity and Transference Number of Li Ions for Li‐Based Rechargeable Batteries

et al. 2021

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Smart electronics and wearable devices require batteries with increased energy density, enhanced safety, and improved mechanical flexibility. However, current state‐of‐the‐art Li‐based rechargeable batteries (LBRBs) use highly reactive and flowable liquid electrolytes, severely limiting their ability to meet the above requirements. Therefore, solid polymer electrolytes (SPEs) are introduced to tackle the issues of liquid electrolytes. Nevertheless, due to their low Li+ conductivity and Li+ transference number (LITN) (around 10−5 S cm−1 and 0.5, respectively), SPE‐based room temperature LBRBs are still in their early stages of development. This paper reviews the principles of Li+ conduction inside SPEs and the corresponding strategies to improve the Li+ conductivity and LITN of SPEs. Some representative applications of SPEs in high‐energy density, safe, and flexible LBRBs are then introduced and prospected.

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“…[ 69 ] The cathode materials are most active in the charged state and, if SPEs are chemically unstable, can catalyze SPE decomposition. [ 14,70 ]…”

Section: Criteria For Spesmentioning

confidence: 99%

Section: Typical Applications Of Spesmentioning

confidence: 99%

Solid Polymer Electrolytes with High Conductivity and Transference Number of Li Ions for Li‐Based Rechargeable Batteries

et al. 2021

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“…A PVC‐LiDFOB layer (named as CEI) was developed on LCO cathode through in situ polymerization ( Figure a). [ 46 ] This layer could separate PEO electrolytes from LCO particles/conductive carbon and thus prevent the oxidative decomposition of PEO. EIS showed the impedance of CEI‐LCO//PEO‐LiTFSI//Li decreased during cycling process, while bare‐LCO//PEO‐LiTFSI//Li increased (Figure 8b), indicating the side reactions at cathode/electrolytes interface were suppressed by CEI.…”

Section: Coating For High‐voltage Cathodesmentioning

confidence: 99%

Functional Applications of Polymer Electrolytes in High‐Energy‐Density Lithium Batteries

Wang

Zhai

Zhou

et al. 2022

Macro Chemistry & Physics

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Polymer electrolytes have attracted great interest in advanced lithium batteries. Recently, it has been found that there are many functional applications of polymer electrolytes in lithium batteries, which are very important for the development of high-energy-density lithium batteries. In this review, the functional applications of polymer electrolytes are reviewed in terms of protecting lithium metal anode, coating for high-voltage cathodes, and improving the safety of batteries. Finally, the remaining challenges and future perspectives of polymer electrolytes in these functional applications are presented. This review aims to provide a comprehensive understanding of polymer electrolytes and promotes their functional application in high-energy-density lithium batteries.

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“…[50][51][52][53][54][55] To push the limit for a thermally stable SEI/CEI, Lu et al developed a method to in-situ solidify VC through heating the precursor solution with the LiCoO 2 (LCO) electrode at 60 C for 30 min and simultaneous incorporation of LiDFOB to render the formation of a thin, uniform and low-resistance CEI layer. 56 Coupling the modified LCO cathode with a poly(ethylene oxide) (PEO) solid electrolyte and a lithium metal anode, the researchers conducted ARC test and revealed that the cell displayed extraordinary safety performance with no distinct thermal runaway below 350 C, superior to most of the liquid LIBs and LiFePO 4 solid polymer lithium battery reported in the literature, implying the effective in-situ polymerization/solidification strategy to boost battery safety. 56 Other strategies to in-situ solidify a SEI/CEI include in-situ electrodeposition method.…”

Section: In Situ Polymerization/ Solidificationmentioning

confidence: 99%

“…56 Coupling the modified LCO cathode with a poly(ethylene oxide) (PEO) solid electrolyte and a lithium metal anode, the researchers conducted ARC test and revealed that the cell displayed extraordinary safety performance with no distinct thermal runaway below 350 C, superior to most of the liquid LIBs and LiFePO 4 solid polymer lithium battery reported in the literature, implying the effective in-situ polymerization/solidification strategy to boost battery safety. 56 Other strategies to in-situ solidify a SEI/CEI include in-situ electrodeposition method. Qiu et al showed that a conformal poly-acrylonitrile (PAN)-based coating layer for the whole cathode could be constructed by in situ electro-deposition with a precursor solution of (10% F I G U R E 4 DSC thermograms for the positive electrodes charged at 4.6 V as function of weight percentage on TTFP in electrolyte.…”

Section: In Situ Polymerization/ Solidificationmentioning

confidence: 99%

Enabling the thermal stability of solid electrolyte interphase in Li‐ion battery

Zu¹,

2021

InfoMat

Self Cite

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Lithium-ion batteries (LIBs) provide power for a variety of applications from the portable electronics to electric vehicles, and now they are supporting the smart grid. Safety of LIBs is of paramount importance in these scenarios. Specifically, thermal safety arouses increasing attention with the piling-up of LIBs. Heat generation can be significant. Hazardous incidents happen when thermal runaway occurs in a single cell level and drives the battery pack failure. Moreover, thermal runaway of LIBs is believed to originate from the exothermic reactions starting from the breakdown of the solid/cathode electrolyte interphase (SEI/CEI). To mitigate this challenge for a safe operation of LIBs, one straightforward and low-cost method is to build thermally stable SEI/CEI. This review gives an overview on the thermal behaviors of SEI/CEI as the first step in thermal runaway. We analyzed the electrolyte composition and the formation process of SEI/CEI that enable SEI/CEI of high thermal stability. It is identified that the stable lithium salts coupled with solvents of high boiling point is one way to enhance thermal stability of the battery system. In addition, the unsaturated bonds, halogen, phosphorus, sulfur, phenol, organic borate, borane, and silane are functional components to facilitate the formation of a thermally stable SEI/CEI, which is the immediate solution to boost thermal stability of high capacity electrodes. Moreover, in-situ polymerization/solidification is effective in enhancing simultaneously the electrochemical, chemical, and thermal stability. Finally, we revealed that only by constructing a stable SEI/CEI simultaneously could we harvest a battery system of high thermal stability.

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4.2 V poly(ethylene oxide)-based all-solid-state lithium batteries with superior cycle and safety performance

Cited by 90 publications

References 35 publications

Solid Polymer Electrolytes with High Conductivity and Transference Number of Li Ions for Li‐Based Rechargeable Batteries

Solid Polymer Electrolytes with High Conductivity and Transference Number of Li Ions for Li‐Based Rechargeable Batteries

Functional Applications of Polymer Electrolytes in High‐Energy‐Density Lithium Batteries

Enabling the thermal stability of solid electrolyte interphase in Li‐ion battery

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4.2 ​V poly(ethylene oxide)-based all-solid-state lithium batteries with superior cycle and safety performance

Cited by 90 publications

References 35 publications

Solid Polymer Electrolytes with High Conductivity and Transference Number of Li Ions for Li‐Based Rechargeable Batteries

Solid Polymer Electrolytes with High Conductivity and Transference Number of Li Ions for Li‐Based Rechargeable Batteries

Functional Applications of Polymer Electrolytes in High‐Energy‐Density Lithium Batteries

Enabling the thermal stability of solid electrolyte interphase in Li‐ion battery

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Product

Resources

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4.2 V poly(ethylene oxide)-based all-solid-state lithium batteries with superior cycle and safety performance