Filler‐Integrated Composite Polymer Electrolyte for Solid‐State Lithium Batteries

Abstract

Figure 7. a) Schematic figures showing the procedure of in situ hydrolysis and interaction mechanisms among PEO chains and SiO 2 . b) Arrhenius plots of ionic conductivity of ceramic-free SPE, PEO-fumed SiO 2 CPE, ex situ CPE, and in situ CPE. a,b) Reproduced with permission. [69] Copyright 2015, American Chemical Society. c) Schematic illustration for the synthesis of ceramic nanowire-filled CPEs, together with SEM images for the CPEs with 15 wt% nanowire fillers. Reproduced with permission. [74] Copyright 2015, American Chemical Society. d) Comparison of possible Li-ion conduction pathways in CPEs with nanoparticles, random nanowires and aligned nanowires. Reproduced with permission. [75] Copyright 2017, Springer Nature. e) Schematic of the CPEs with the interwelded garnet nanofiber network. Reproduced with permission. [78] Copyright 2017, The Authors, published by National Academy of Sciences. f) Schematic showing the synthetic process of the SiO 2 -aerogel-reinforced CPE. Reproduced with permission. [80] Copyright 2018, Wiley-VCH.

Realizing Scalable Nano-SiO2-Aerogel-Reinforced Composite Polymer Electrolytes with High Ionic Conductivity via Rheology-Tuning UV Polymerization

“…Firstly, the Lewis-acidic sites on SiO 2 interact with EO groups, which decreases the polymer crystallinity and weakens the interaction between Li + and EO groups [ 24 , 25 , 26 ]. Second, the Lewis acid–base interaction between the SiO 2 and TFSI - from Li salts promotes the dissociation of Li salts [ 27 , 28 ]. This synergistic effect produces more free Li + in QPEs.…”

Recent Advances in Conduction Mechanisms, Synthesis Methods, and Improvement Strategies for Li1+xAlxTi2−x(PO4)3 Solid Electrolyte for All‐Solid‐State Lithium Batteries

“…To enhance the conductivity, the optimal fillers loading in composite electrolytes are generally between 10 vol% and 15 vol%, where discrete ceramic particles are dispersed homogenously in the polymer matrix. [189,190] Increasing the concentration of fillers can immobilize Li salt anions through Lewis acidbase interaction to construct a percolated network, which will increase the ionic conductivity effectively. However, the filler particles tend to agglomerate once the increase of particle proportion in composite electrolytes exceeds the ceramic percolation threshold.…”

Quasi-Solid Polymer Electrolyte with Multiple Lithium-Ion Transport Pathways by In Situ Thermal-Initiating Polymerization

“…5−7 Unfortunately, the low ion conductivity and the poor cycling stability still restrict the serviceable lifespan of SPEs in SSLMBs. 8,9 SPEs with ionic conductivity have polar functional groups (C−O, C�O, C�N, −O−(C�O)−O−, etc.) on polymer chains that can interact with Li + to enable spatial migration of Li + through coupling/decoupling and segmental motion of flexible chains.…”

“…Due to the demand for the development of portable electronic devices and electric vehicles, solid-state lithium metal batteries (SSLMBs) have been regarded as one of the most optimal solutions to pursue next-generation energy storage devices with high safety. , The main aspect of the interest in solid-state Li metal batteries is that they address the potential hazards and guarantee the fundamental safety when Li metal is used as the anode. As a result, researchers have matched Li metal by using a solid electrolyte instead of a liquid organic electrolyte in the expectation of a broadened battery electrochemical window, high safety, and crash resistance. , Solid polymer electrolytes (SPEs) are favored by researchers because of their flexible machinability and good ductility. − Unfortunately, the low ion conductivity and the poor cycling stability still restrict the serviceable lifespan of SPEs in SSLMBs. , …”