Recent Research on Strategies to Improve Ion Conduction in Alkali Metal‐Ion Batteries

Abstract

Ion conduction refers to a conductive process consisting of the directional motion of ions driven by an electric field, which is one of the most important issues for further improvement of batteries in the current and foreseeable future. In order to better understand the conduction phenomena in alkali metal‐ion (Li+/Na+/K+) batteries (AMIBs) and achieve technological breakthroughs, the recent studies on the ion diffusion of electrode materials and the ion conduction of electrolytes for AMIBs are investigated. Three aspects of the factors that affecting ion conduction in AMIBs are mainly listed: (i) crystal structure related high ion conduction in crystalline materials. (ii) tuning the lattice volume and interface by doping and compounding. (iii) improvement in experimental synthesis and modification methods. Through this review, we hope to facilitate more efficient and targeted research to improve ion conduction in AMIBs.

Iron Selenide Microcapsules as Universal Conversion‐Typed Anodes for Alkali Metal‐Ion Batteries

“…Rechargeable alkali metal‐ion (such as Li + , Na + , and K + ) batteries (AMIBs) are significant potential and practical energy storage devices. [ 1–3 ] As the most famous example, rechargeable lithium‐ion batteries (LIBs) have dominated the market in portable electronics and electric vehicles over the past two decades. [ 4,5 ] However, the insufficient and uneven distribution of lithium resources raised concerns about the future deployment of LIBs.…”

One-pot coating of LiCoPO4/C by a UiO-66 metal–organic framework

“…Ongoing research in the eld of Li-ion batteries focuses on the improvement of energy density and power performance. 1,2 A straightforward approach to improve these properties is the use of a high voltage positive electrode material. [3][4][5] In the family of LiMPO 4 olivines, the voltage of the redox pair equals 3.4 V, 4.1 V, and 5 V for M ¼ Fe, Mn, Co correspondingly.…”

Advances in materials for all‐climate sodium‐ion batteries

“…Essentially, the intrinsic ion conductivity depends on the crystal structure, grain boundary, and the properties of the interfaces. Element doping and material compounding methods have been extensively explored to improve the ion diffusion performance of materials 38 . The other way is to shorten the diffusion length, which can also reduce the diffusion time ( t = D / L 2 ).…”