Rational Design of High‐Loading Electrodes with Superior Performances Toward Practical Application for Energy Storage Devices

Abstract

High‐loading electrodes play a crucial role in designing practical high‐energy batteries as they reduce the proportion of non‐active materials, such as current separators, collectors, and battery packaging components. This design approach not only enhances battery performance but also facilitates faster processing and assembly, ultimately leading to reduced production costs. Despite the existing strategies to improve rechargeable battery performance, which mainly focus on novel electrode materials and high‐performance electrolyte, most reported high electrochemical performances are achieved with low loading of active materials (<2 mg cm−2). Such low loading, however, fails to meet application requirements. Moreover, when attempting to scale up the loading of active materials, significant challenges are identified, including sluggish ion diffusion and electron conduction kinetics, volume expansion, high reaction barriers, and limitations associated with conventional electrode preparation processes. Unfortunately, these issues are often overlooked. In this review, the mechanisms responsible for the decay in the electrochemical performance of high‐loading electrodes are thoroughly discussed. Additionally, efficient solutions, such as doping and structural design, are summarized to address these challenges. Drawing from the current achievements, this review proposes future directions for development and identifies technological challenges that must be tackled to facilitate the commercialization of high‐energy‐density rechargeable batteries.

A Novel and Convenient Sol‐Gel Approach for the Synthesis of High‐Performance LiNi1/3Co1/3Mn1/3O2 Cathode Materials in Lithium‐Ion Batteries

“…The local magnification image in Figure 4c shows that LNCM‐850/12 has the smallest mid‐frequency arc diameter, followed by LNCM‐850/10, LNCM‐850/14, LNCM‐850/16, LNCM‐850/8, and LNCM‐850/6. This implies that the LNCM‐850/12 electrode has the lowest charge transfer resistance, allowing Li + transport and diffusion during the electrode reactions, resulting in faster charging and discharging capabilities, [67,68] which is consistent with the electrochemical performance results obtained.…”