Composite Polymer Electrolytes Based on PVA/PAN for All-Solid-State Lithium Metal Batteries Operated at Room Temperature

Tran, Hoai Khang; Wu, Yi‐Shiuan; Chien, Wen-Chen; Wu, She‐Huang; Jose, Rajan; Lue, Shingjiang Jessie; Yang, Chun–Chen

doi:10.1021/acsaem.0c02018

Cited by 51 publications

(43 citation statements)

References 79 publications

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“…After the PLSS was completely dissolved, PVA powder was added into the respective homogeneous solutions. The mixed-polymer solutions were kept at 90 °C and stirred for 8 h. Subsequently, the Li salt LiTFSI (50 wt % with respect to PVA), the ceramic filler Al-doped LLZO (20 wt % with respect to the total polymer weight), and the plasticizer SN (10 wt % with respect to the total polymer weight) 32 were added into the mixed-polymer solutions. After sequential ultrasonic dispersion for 3 h and stirring for 12 h, the resulting solutions were cast onto a glass plate and then dried for 24 h at room temperature and then for 48 h at 80 °C under vacuum.…”

Section: Methodsmentioning

confidence: 99%

A Sandwich-Structure Composite Polymer Electrolyte Based on Poly(vinyl alcohol)/Poly(4-lithium styrene sulfonic acid) for High-Voltage Lithium Batteries

Tran

Babulal

et al. 2021

ACS Appl. Energy Mater.

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High-performance all-solid-state lithium-metal batteries (ASSLMBs) require solid electrolytes displaying high electrochemical stability, high ion conductivity, a high lithium transference number, excellent compatibility with the electrodes, and the ability to work at room temperature. In this study, we used a solution-casting technique to prepare a flexible composite polymer electrolyte (CPE) having a high lithium transference number and applied it within ASSLMBs. The CPE comprised a poly(vinyl alcohol) (PVA)/poly(4-lithium styrene sulfonic acid) (PLSS) blend with an Al-doped Li7La3Zr2O12 (LLZO) filler sandwiched on both sides by poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)–lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) skin layers. The PVDF-HFP-LiTFSI skin layers not only lowered the interfacial resistance between the electrodes and the sandwich-CPE electrolyte but also suppressed lithium dendrite growth. The sandwich-CPE membrane exhibited high ionic conductivity (3.82 × 10–4 S cm–1) and a high lithium transference number (0.776) at room temperature. A CR2032 coin cell having the structure Li/sandwich-CPE/LMO@T-LNCM811 delivered excellent rate performance and cycle stability (discharge capacity of 130.55 mA h g–1 with 85.63% capacity retention after 100 cycles at a rate of 0.5C at room temperature). A pouch cell having the structure Li/sandwich-CPE/LMO@T-LNCM811 achieved a discharge capacity of 18.1 mA h with a capacity retention of 90.46% after 30 cycles at 0.2C at room temperature. This strategy for fabricating sandwich-CPE structures has potential for application in the preparation of high-voltage cathodes for ASSLMBs.

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Section: Methodsmentioning

confidence: 99%

A Sandwich-Structure Composite Polymer Electrolyte Based on Poly(vinyl alcohol)/Poly(4-lithium styrene sulfonic acid) for High-Voltage Lithium Batteries

Tran

Babulal

et al. 2021

ACS Appl. Energy Mater.

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“…This suggests that this type of SPE is suitable for solid-state battery application. [39][40][41][42] Finally, there is no doubt that the relatively low ionic conductivity of SPE1-21 or SPE2-31 in the absence of plasticizers and/or oxides and the interfacial resistance represent great challenges to the pursuit of satisfactory electrochemical performance of SSBs.…”

Section: Charge/discharge Cycling Performance Of Ssbmentioning

confidence: 99%

Solid acrylonitrile‐based copolymer electrolytes and their potential application in solid state battery

Pham

Jheng

Tsai

et al. 2022

J of Applied Polymer Sci

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Two solid acrylonitrile-based polymer electrolytes (SPE1-21 and SPE2-31) were investigated. SPE1-21 comprises the acrylonitrile/2-ethylhexyl acrylate copolymer and 33 wt% lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). In contrast, SPE2-31 comprises the AN/vinyl acetate (VAC) copolymer and 25 wt% LiTFSI. SPEP1-21 shows inferior ionic conductivity and transference number to SPE2-31. However, SPE1-21 has higher oxidation potential and better interfacial stability against Li metal than SPE2-31. These SPEs were used as the separator in solid-state batteries with LiFePO 4 as the cathode and Li foil as the anode. For SPE1-21 cell, the charge/discharge cycling remained relatively stable up to 223rd cycle, at which point the coulombic efficiency (CE) drops to 95.0% and the corresponding capacity retention is 98.1%. On the other hand, SPE2-31 cell exhibited very poor cycling performance; the CE rapidly dropped to 55.5% at 10th cycle. This indicates that undesired side reaction occurs during the cycling process, which is attributed to the oxidation reaction of acetate group of the VAC unit in the AN-VAC copolymer.

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“…Rechargeable lithium-ion batteries (LIBs) are considered stateof-the-art battery technology for use in electronic gadgets, such as cell phones, laptops, tablets, other portable devices, and electric vehicles owing to their high energy density, extended life cycle, low self-discharge, no memory effect, lightweightness, and a high operating potential. [1][2][3][4] However, conventional LIBs continue to experience safety hazards, including Li dendrite formation, explosions initiated by flammable organic solvents, electrolyte leakage, and unwanted side reactions. [5][6] Employing solid electrolytes in the fabrication of the next-generation LIBs is one of the most efficient strategies for resolving these challenges.…”

Section: Introductionmentioning

confidence: 99%

Composite Solid Electrolyte for High Voltage Solid‐State Li‐Metal Battery

et al. 2022

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A composite solid electrolyte (CSE) was prepared by incorporating Li7La3Zr2O12 (LLZO) particles, lithium bis(trifluoromethanesulfonyl) imide (LiTFSI), and different concentrations of a solid plasticizer in a poly(vinylidene fluoride hexafluoropropylene) (PVDF‐HFP) matrix. Subsequently, we investigated the ionic conductivity and electrochemical stability of the CSE, and its interfacial compatibility with a Li‐metal electrode. 30 wt.% plasticizer with CSE exhibits a high ionic conductivity of 4.23×10−4 and 8.14×10−4 S cm−1 at 25 and 60 °C, respectively, with an excellent stability of up to 4.76 V vs. Li/Li+. The CSE is sandwiched between the Li‐metal and NCM811 for the fabrication of a solid‐state battery (SSB), which delivers a discharge capacity (163 mAh g−1) at a rate of 0.2 C (60 °C). The LiNbO3 (LNO) modification over the NCM811 cell delivers a high discharge capacity of 198 mAh g−1, excellent rate capability, and good cycle life. Furthermore, the LNO coating on the surface of the NCM811 cathode, which effectively improves the contact between the cathode and electrolyte, eventually leads to an increase in the discharge capacity. Therefore, the prepared CSE is a good choice for use in SSB; moreover, the LNO coating noticeably improved the cycling stability, reversibility, and rate capability compared to an unmodified NCM811 cathode in the SSB configuration.

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Composite Polymer Electrolytes Based on PVA/PAN for All-Solid-State Lithium Metal Batteries Operated at Room Temperature

Cited by 51 publications

References 79 publications

A Sandwich-Structure Composite Polymer Electrolyte Based on Poly(vinyl alcohol)/Poly(4-lithium styrene sulfonic acid) for High-Voltage Lithium Batteries

A Sandwich-Structure Composite Polymer Electrolyte Based on Poly(vinyl alcohol)/Poly(4-lithium styrene sulfonic acid) for High-Voltage Lithium Batteries

Solid acrylonitrile‐based copolymer electrolytes and their potential application in solid state battery

Composite Solid Electrolyte for High Voltage Solid‐State Li‐Metal Battery

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