A Review of Emerging Dual‐Ion Batteries: Fundamentals and Recent Advances

Abstract

Dual‐ion batteries (DIBs), based on the working mechanism involving the storage of cations and anions separately in the anode and cathode during the charging/discharging process, are of great interest beyond lithium‐ion batteries (LIBs) in high‐efficiency energy storage due to the merits of high working voltage, material availability, as well as low cost and excellent safety. Despite the progress achieved, the practical applications of DIBs are still hindered by negative issues, such as limited capacity and cyclic stability, which triggers the development of suitable electrode materials with highly reversible capacities, and corresponding electrolytes with high oxidative stability as well as sufficient reaction kinetics of active ions. Herein, in this article, a systematic and comprehensive review of fundamentals and recent advances in current DIBs with subcategories of cathode materials, anode materials, and electrolytes are presented. In particular, their energy storage mechanisms, as well as their respective features, are dissected. Furthermore, some strategies and perspectives are proposed for facilitating the further development of DIBs in the future.

Application of Ionic Liquids for Batteries and Supercapacitors

“…These “post-lithium” battery technologies, which are essentially based on a high raw material abundance and low-cost metal-ion batteries such as sodium-ion (Na-ion), potassium-ion (K-ion), magnesium-ion (Mg-ion), aluminum-ion (Al-ion), zinc-ion (Zn-ion), etc., have a lot of advantages. However, their developments are still in the early stages of research when compared to LIBs [ 82 , 97 , 98 , 99 ]. One of the key challenges to all these metal-ion batteries is to develop a high-performance, safe and reliable electrolyte.…”

Interface engineering towardhigh‐efficiencyalloy anode for next‐generation energy storage device

“…Al is a promising anode material attributed to its high specific capacity, natural abundance, low costs, and excellent conductivity 53,54 . However, Al anode is still hindered for practical applications due to the pronounced volume variation that accompanies the alloying reaction during charge/discharge, which results in pulverization and capacity attenuation 55 . Moreover, the slow Li diffusion during LiAl phase formation and dissolution leads to lithium trapping in the Al anode and further capacity fading 56 .…”

A Desolvation‐Free Sodium Dual‐Ion Chemistry for High Power Density and Extremely Low Temperature

“…[21,26] However,c onventional organic electrolyte tends to continuously decompose at such high potential, resulting in low Coulombic efficiency and severe capacity decay of DIBs during cycling. [20,21,25,26,28,29] Given the fact that developing apractical advanced electrolyte with oxidative stability higher than 5V(vs.Li + /Li)isstill hard to achieve at present, utilizing alternative cathode materials that store anions at relatively low potentials would be ag ood strategy. [25,30] As ak ind of anion-storing positive electrodes,o rganic polymers are undoubtedly excellent candidates with anion-doping mechanism for their low-cost, large-scale production and sustainability.…”