Hybridizing polymer electrolyte with poly(ethylene glycol) grafted polymer-like quantum dots for all-solid-state lithium batteries

Kou, Weijie; Lv, Ruixin; Sheng-wu, Zuo; Yang, Zhihao; Huang, Jiajia; Wu, Wenjia; Wang, Jingtao

doi:10.1016/j.memsci.2020.118702

Cited by 32 publications

(9 citation statements)

References 47 publications

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“…Small-sized nanofillers are uniformly dispersed in the PEO electrolyte, which will produce abundant filler–polymer interfaces, effectively destroying the orderly arrangement of PEO and increasing the amorphous phase of SPE. In addition, nanofillers can form Lewis acid–base effects with lithium salts to release more free lithium ions, thereby increasing the ionic conductivity of SPE . According to the indefinite integral formula of the Arrhenius formula ln( k ) = − E a /( RT ) + B , the activation energy ( E a ) of different electrolytes is calculated as shown in Figure f.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, nanofillers can form Lewis acid−base effects with lithium salts to release more free lithium ions, thereby increasing the ionic conductivity of SPE. 62 According to the indefinite integral formula of the Arrhenius formula ln(k) = −E a /(RT) + B, the activation energy (E a ) of different electrolytes is calculated as shown in Figure 2f. After AM is added, the activation energy of P-P-A SPE (9.37 kJ mol −1 ) decreases compared with that of P-P SPE (12.8 kJ mol −1 ), indicating that it accelerates the transmission of lithium ions, which may be due to the formation of an additional lithium environment between AM and LiTFSI.…”

Section: Resultsmentioning

confidence: 99%

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Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

et al. 2021

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The low room temperature ionic conductivity (RTσ) of polyethylene oxide (PEO)-based solid-state polymer electrolyte (SPE) severely restricts its application for lithium batteries. Herein, acrylamide (AM) has been introduced into the poly(ethylene glycol) methyl ether methacrylate-poly(ethylene glycol) diacrylate (P-P). The multiple hydrogen bonds of AM expand the original single lithium environmentand Li•••OC), which accelerates the conduction of lithium ions. In addition, the double bond modification of nanosilica (SiO 2 ) not only improves the mechanical properties but also brings a high-speed orderly vehicular transport mechanism. The multiple-lithium-ions environment is rearranged on the surface of the SiO 2 to play a more significant role, making the RTσ of SPE reach 2.6 × 10 −4 S cm −1 , and the Li-ion transfer number reaches 0.84. The results show that the assembled all-solid-state lithium−sulfur battery has a high initial discharge capacity of 707 mAh g −1 at 30 °C when the sulfur loading is 4.3 mg cm −2 , good cycle stability (capacity retention rate of 89% after 100 cycles at 0.1 C), and excellent rate performance. This SPE with high RTσ, stable interface engineering, and broad potential window (5.1 V) is expected to be used in other lithium/lithium-ion batteries that require high-voltage tolerance.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

et al. 2021

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“…[47] In addition, the melting point (T m ) of PEO CPE was 51.9 °C corresponding to high melting enthalpy, which also indicated high crystallinity of PEO inhibited the ion transport in the polymer chains. [48,49] Besides, TGA was used to determine the safe operating temperature range of the CPEs. Figure 2 (d) shows distinct mass loss corresponding to the decomposition of the polymer matrices of the 30 H-Z-CPE at 400 °C and the PEO CPE at 300 °C, indicating that hollow ZIF-8/IL filler effectively increases the thermal stability of the CPEs.…”

Section: Li-conductivity Of the Cpesmentioning

confidence: 99%

A Hollow Porous Metal‐Organic Framework Enabled Polyethylene Oxide Based Composite Polymer Electrolytes for All‐Solid‐State Lithium Batteries

Feng

et al. 2021

Batteries & Supercaps

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Composite polymer electrolytes (CPEs) are replacing traditional liquid electrolytes for next‐generation all‐solid‐state batteries (ASSBs) with enhanced safety and uncompromising electrochemical properties. However, short‐circuit due to lithium‐dendrite growth in the CPEs largely hinders its practical applications. Here, we report a thin CPE composed of the hollow ZIF‐8 encapsulating Li‐ionic liquids (ZIF‐8/IL) nano‐fillers and polyethylene oxide (PEO) matrix. It shows an ionic conductivity of 1.41×10−4 S cm−1 at 25 °C with improved surface roughness, thermal stability, and electrochemical stability. The specific core‐shell structure of fillers benefits from its insulation shell for inhibiting lithium dendrite growth and the inner cavity for storing sufficient Li‐IL with enhanced Li diffusivity. The CPE with 30 % filler (30 H‐Z CPE) content exhibits excellent cycle stability of 770 h in the Li symmetric cell and an outstanding discharge capacity of 182.5 mAh g−1 and capacity retention of 73 % after 100 cycles at 0.1 C and 60 °C in the Li/30 H‐Z CPE/NCM811 asymmetric cell.

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“…The study of polymer systems can be traced back to the 1970s when Wright and co-workers demonstrated poly(ethylene oxide) (PEO)-based polymer electrolytes . Up to now, most of the all-solid-state polymer electrolytes are still based on modified PEO that are produced through various strategies such as grafting, copolymerization, and blending. − In spite of great efforts in improving the performance of PEO-based electrolytes, investigation of high ionic conductivity at ambient temperature is quite challenging due to cation–dipole interactions . In 2012, Tominaga and co-workers demonstrated a poly(ethylene carbonate)-based polymer electrolyte with an ionic conductivity of 1.6 × 10 –5 S/cm at 30 °C, which laid the groundwork for future development. , In 2015, Zhang explored a poly(propylene carbonate)-based electrolyte for solid-state lithium batteries .…”

Section: Introductionmentioning

confidence: 99%

Facile and Powerful In Situ Polymerization Strategy for Sulfur-Based All-Solid Polymer Electrolytes in Lithium Batteries

Xiao

Xuan

et al. 2021

ACS Appl. Mater. Interfaces

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All-solid-state polymer electrolytes can improve the safety of lithium batteries. However, the common Bellcore polymer electrolyte technology faces several issues such as wasting a mass of solvent, high manufacturing cost, and poor interfacial compatibility between polymer electrolytes and electrodes. Herein, we propose an in situ polymerization technique to synthesize all-solid-state polymer electrolytes by a thiol-Michael addition click reaction. The alternating copolymer is made from the Michael addition reaction of ethylene glycol dimethacrylate (EGDMA) and 1,2-ethane dithiol (EDT). At ambient temperature, the obtained composite polymer electrolyte displays an ionic conductivity of 3.02 × 10–5 S/cm, an electrochemical window of 4.5 V, and a lithium-ion transference number of 0.45. In light of this unique polymerization process, the traditional fabrication method of liquid electrolyte-based lithium batteries can be adopted in the current study for the preparation of all-solid-state Li/LiFePO4 batteries. It was found that the assembled all-solid-state Li/LiFePO4 batteries exhibited superior charging/discharging performance and preferable safety. Thus, this facile and powerful in situ polymerization strategy may open up a new approach for the design and fabrication of all-solid-state batteries with desirable performances.

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Hybridizing polymer electrolyte with poly(ethylene glycol) grafted polymer-like quantum dots for all-solid-state lithium batteries

Cited by 32 publications

References 47 publications

Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

A Hollow Porous Metal‐Organic Framework Enabled Polyethylene Oxide Based Composite Polymer Electrolytes for All‐Solid‐State Lithium Batteries

Facile and Powerful In Situ Polymerization Strategy for Sulfur-Based All-Solid Polymer Electrolytes in Lithium Batteries

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