Structure Code for Advanced Polymer Electrolyte in Lithium‐Ion Batteries

Abstract

Over the past decade, lithium‐ion batteries (LIBs) have been widely applied in consumer electronics and electric vehicles. Polymer electrolytes (PEs) play an essential role in LIBs and have attracted great interest for the development of next‐generation rechargeable batteries with high energy density. Due to the several practical applications of LIBs and high demands for LIBs performance, many state‐of‐the‐art PEs with different structures and functionalities have been developed to regulate the LIBs performance, especially their rate capability, cycling durability, and lifespan. In this review, the recent advances in high‐performance LIBs prepared using well‐defined PEs are summarized. The ion‐transport mechanisms and preparation techniques of various well‐defined PE classes compared to conventional PEs are also discussed. The aim is to elucidate the structure code for advanced PEs with optimized properties, including ionic conductivity, mechanical properties, processability, accessibility, etc. The existing challenges and future perspectives are also discussed, setting the basis for designing novel PEs for energy conversion applications.

One-Pot Synthesis of Polyester-Based Linear and Graft Copolymers for Solid Polymer Electrolytes

“…MMA = methyl methacrylate, BMA = n-butyl methacrylate, St = styrene, and PEGMA = poly(ethylene glycol) methacrylate (M n = 475 g mol -1 ). 1 H NMR in CDCl 3 by the ratio of integrals of the characteristic signals.…”

“…The solid polymer electrolyte (SPE) with a controllable structure has been widely used in lithium-ion batteries (LIBs) due to its precisely designed chain structure and topological structure. [1][2][3][4][5][6][7] The design and combination of different polymer segments can make the polymer electrolyte possess good mechanical strength and electrochemical performance and provide a guarantee for the cycle performance of LIBs. [8][9][10][11][12][13] Conventional linear poly(ethylene oxide) (PEO)-based SPEs have low ionic conductivity (10 -7 -10 -6 S cm -1 ) at room temperature.…”

“…from1 H NMR in CDCl 3 by the ratio of integrals of the characteristic signals. e Determined by GPC in THF as eluent using PS standards.…”

Lithium Metal Anode for High-Power and High-Capacity Rechargeable Batteries

“…A typical PEO-based polymer electrolyte composed of PEO8LiTFSI exhibits a conductivity of 1 × 10 -5 S cm -1 at 25 °C and transforms to a high-temperature phase at around 60 °C , exhibiting high ion conductivity of approximately 10 -3 S cm -1 [74]. In the past few decades, high room temperature lithium-ion conductivity polymer electrolytes have been extensively developed by several researchers [75]. However, there are presently no polymer electrolytes that exhibit room temperature lithium-ion conductivities higher than 10 -3 S cm -1 .…”

Data‐Driven Safety Risk Prediction of Lithium‐Ion Battery

“…For example, battery suppliers may have bolder choices for high‐energy‐density electrode materials [ 1 ] and electrolytes. [ 2 ] Having a confident understanding of LIB safety risks also grants vehicle original equipment manufacturers (OEMs) a more extensive design space and reduces redundant protective parts, [ 3 ] which can improve the safety level and reduce the curb weights of the electric vehicles simultaneously.…”