Designing mechanically reinforced filler network for thin and robust composite polymer electrolyte

Cheng, Guangzeng; Wang, Huanlei; Wu, Jingyi

doi:10.1002/bte2.20230037

Cited by 3 publications

(1 citation statement)

References 125 publications

(262 reference statements)

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“…Although it is widely believed that improving the ionic conductivity of solid-state electrolytes (SSE) can enhance the performance of ASSLBs, the aim of high ionic DOI: 10.1002/adma.202312927 conductivity may be insufficient when considering charge transport inside the entire ASSLBs. [5][6][7][8][9] During battery operation, ion transport percolating networks are critically required in composite cathodes to sustain the electrochemical reactions of cathode active materials (CAMs). In traditional LIBs with liquid electrolytes, the porous feature of cathodes enables convenient electrolyte infiltration and consequently good ion percolation.…”

Section: Introductionmentioning

confidence: 99%

Efficient Ion Percolating Network for High‐Performance All‐Solid‐State Cathodes

Cheng,

Sun,

Wang

et al. 2024

Advanced Materials

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All‐solid‐state lithium batteries (ASSLBs) face critical challenges of low cathode loading and poor rate performances, which handicaps their energy/power densities. The widely‐accepted aim of high ionic conductivity and low interfacial resistance seems insufficient to overcome these challenges. Here, we reveal that efficient ion percolating network in the cathode exert a more critical influence on electrochemical performance of ASSLBs. By constructing vertical alignment of Li0.35La0.55TiO3 nanowires (LLTO NWs) in solid‐state cathode through magnetic manipulation, ionic conductivity of the cathode increases twice compared with the cathode consisted of randomly distributed LLTO NWs. The all‐solid‐state LiFePO4/Li cells using poly(ethylene oxide) as electrolyte is able to deliver high capacities of 151 mAh g−1 (2 C) and 100 mAh g−1 (5 C) at 60 °C, and a room‐temperature capacity of 108 mAh g−1 can be achieved at a charging rate of 2 C. Furthermore, the cell can reach a high areal capacity of 3 mAh cm−2 even with a practical LFP loading of 20 mg cm−2. The universality of this strategy is also presented showing the demonstration in LiNi0.8Co0.1Mn0.1O2 cathodes. This work offers new pathways for designing ASSLBs with improved energy/power densities.This article is protected by copyright. All rights reserved

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Section: Introductionmentioning

confidence: 99%

Efficient Ion Percolating Network for High‐Performance All‐Solid‐State Cathodes

Cheng,

Sun,

Wang

et al. 2024

Advanced Materials

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Aligned Hollow Silicon Nanorods Containing Ionic Liquid Enhanced Solid Polymer Electrolytes with Superior Cycling and Rate Performance

Gao,

Zheng,

Pan

et al. 2024

Advanced Science

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The low lithium‐ion conductivity of polyethylene oxide (PEO)‐based polymer electrolytes limits their application in solid‐state lithium batteries and related fields. Here, ionic liquids (ILs) are injected into hollow silicon nanorods (HSNRs) to prepare a composite solid polymer electrolyte (CSPE) with aligned HSNRs containing ILs (F‐ILs@HSNRs). Applying a magnetic field promoted uniform dispersion and orientation of F‐ILs@HSNRs in CSPE. The addition of F‐ILs@HSNRs reduced PEO crystallinity and formed Li+ transport pathways at the F‐ILs@HSNRs/PEO interface. Calculations and multi‐physics simulations reveal that ILs within F‐ILs@HSNRs contribute most to lithium‐ion conduction, followed by the F‐ILs@HSNRs/PEO interface. When F‐ILs@HSNRs are arranged perpendicular to the electrodes, the CSPE exhibits the shortest Li+ migration pathways, resulting in stable and efficient lithium‐ion conduction. The conductivity (2.14 × 10−4 S cm−1) and lithium‐ion migration number tLi+ (0.307) are the highest, being 125 times and 184% higher, respectively, than those of PEO‐LiTFSI, when compared to CSPEs with randomly arranged or parallel‐aligned F‐ILs@HSNRs. Furthermore, Li|CSPE|Li batteries and LiFePO4|CSPE|Li batteries display stable cycling for over 2000 h, with coulombic efficiency approaching 100%. Excellent electrochemical reversibility is also confirmed in the rate performance test.

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Ceramic Rich Composite Electrolytes: An Overview of Paradigm Shift toward Solid Electrolytes for High‐Performance Lithium‐Metal Batteries

Maurya,

Bazri,

Srivastava

et al. 2024

Advanced Energy Materials

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Exploiting the synergy between organic polymer electrolytes and inorganic electrolytes via the development of composite electrolytes can suggest solutions to the current challenges of next‐generation solid‐state lithium‐metal batteries (SSLMBs). Depending upon a mass fraction of inorganic fillers and organic polymers, composite electrolytes are broadly classified into “ceramic‐in‐polymer” (CIP) and “polymer‐in‐ceramic” (PIC) categories, inheriting distinct structure and electrochemical properties. Since the stability and electrochemical characteristics of the inorganic phase are superior to those of the organic phase for lithium‐ion conduction, applying lithium‐enrich active filler in PIC seems more promising. The inorganic phase preserves the primary migratory channels in the PIC electrolyte, while the viscoelastic properties attempt to be introduced from the organic binder or host. The present work overviews the studies on state‐of‐the‐art PIC electrolytes, the fundamental mechanism of ionic conduction, preparation methods, and current progress in materials development for SSLMBs. In addition, the modification strategies for improving the electrode–electrolyte interface are also emphasized. Moreover, it further prospects the current challenges and effective strategies for the future development of PICs‐based CPEs to accelerate the practical application of SSLMBs. This review examines the progress and outlook of PIC‐based electrolytes for next‐generation lithium batteries.

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Designing mechanically reinforced filler network for thin and robust composite polymer electrolyte

Cited by 3 publications

References 125 publications

Efficient Ion Percolating Network for High‐Performance All‐Solid‐State Cathodes

Efficient Ion Percolating Network for High‐Performance All‐Solid‐State Cathodes

Aligned Hollow Silicon Nanorods Containing Ionic Liquid Enhanced Solid Polymer Electrolytes with Superior Cycling and Rate Performance

Ceramic Rich Composite Electrolytes: An Overview of Paradigm Shift toward Solid Electrolytes for High‐Performance Lithium‐Metal Batteries

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