Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries

Abstract

A zeolite/polyimide composite separator with a spongy-like structure was prepared by phase inversion methods based on heat-resistant polyimide (PI) polymer matrix and ZSM-5 zeolite filler, with the aim to improve the thermal stability and electrochemical properties of corresponding batteries. The separator exhibits enhanced thermal stability and no shrinkage up to 180 °C. The introduction of a certain number of ZSM-5 zeolites endows the composite separator with enhanced wettability and electrolyte uptake, better facilitating the free transport of lithium-ion. Furthermore, the composite separator shows a high ionic conductivity of 1.04 mS cm−1 at 25 °C, and a high decomposition potential of 4.7 V. Compared with the PP separator and pristine PI separator, the ZSM-5/PI composite separator based LiFePO4/Li cells have better rate capability (133 mAh g−1 at 2 C) and cycle performance (145 mAh g-1 at 0.5 C after 50 cycles). These results demonstrate that the ZSM-5/PI composite separator is promising for high-performance and high-safety lithium-ion batteries.

Nanozeolite ZSM-5 electrolyte additive for long life sodium-ion batteries

“…In this work we have designed the electrolyte with the addition of an inorganic water (H 2 O) and hydrogen fluoride (HF) scavenger, [23][24][25] nano H-ZSM-5 zeolite (NZeo). It consists of a framework of linked tetrahedra, each consisting of four O atoms surrounding a cation.…”

Facile fabrication and characterization of aliphatic polyketone (PK) micro/nano fiber membranes via electrospinning and a post treatment process

“…Table 5 showed the thermal property of PK compared with the other membranes such as PAN nanober membrane for water treatment application and PE or PP membranes for Li-ion battery application. 33,34 As a result, PK showed the similar thermal property with PAN, indicating there might be no problem at high temperature water treatment application. However, Table 5 indicated that PK had better thermal property than the commercial PE or PP battery separators.…”

“…6 Tensile strength of PK micro/nano fiber membranes. Table 5 Thermal properties of PK, PE, PP and PAN membranes (IDT: initial decomposition temperature, FDT: final decomposition temperature) 19,33,34 Sample name…”

Hard Carbon Composite Electrodes for Sodium‐Ion Batteries with Nano‐Zeolite and Carbon Black Additives

“…A cage size of 5Å was chosen to channel the solvated sodium ions efficiently [42–45] . Zeolite‐like materials have been used in lithium‐ion batteries before as a solid electrolyte, to capture moisture, to enhance the wettability of the separator, or use of a silicon‐zeolite compound for better cycling stability [46–55] . Some patents state the use of metal composites (metal oxide and metal‐carbon alloyed), such as zeolite, within the electrode slurry for lithium‐ion batteries [56] .…”

“…[42][43][44][45] Zeolite-like materials have been used in lithiumion batteries before as a solid electrolyte, to capture moisture, to enhance the wettability of the separator, or use of a siliconzeolite compound for better cycling stability. [46][47][48][49][50][51][52][53][54][55] Some patents state the use of metal composites (metal oxide and metalcarbon alloyed), such as zeolite, within the electrode slurry for lithium-ion batteries. [56] Previous work has shown the benefit of nano-zeolite additives at low weight percentages in sodium-ion electrolytes.…”