Rationalizing the Anion Storage in Cathodes for Optimum Dual-Ion Batteries: State of the Art and the Prospect

Abstract

For a dual-ion battery (DIB) configuration, both anions and cations contribute to the capacity. A high anion intercalation operating potential corresponds to a wide working window, which leads to both high energy density and power density for DIBs. Because orderly layered structures and proper interlayer space can accommodate anion intercalation, graphite was widely used as the cathode for DIBs. However, the relatively low discharge capacity and poor cycling stability of graphite cathode limit the practical application of DIBs. Therefore, it is crucial for anion storage to construct a robust and stable cathode. On the basis of the delicate structural design of electrodes, we summarize the main factors affecting the anion storage and the strategies for improving performance of DIBs, which will provide far-reaching significance for improving the capacity and stability of DIBs.

Virtual Special Issue of Recent Research Advances in China: Batteries and Energy Storage

“…Yue et al 3 update the development of aqueous alkaline MIBs in China, with an emphasis on the electrode materials and the concentrated electrolytes. Yang et al 4 summarize the main factors affecting the anion storage in the dual-ion batteries (DIBs) and overview the strategies that have been applied to improve the performance of the DIBs. Ye et al 5 introduce the research progress of organic electrode materials in multivalention batteries, including the charge storage mechanisms and the strategies employed to address the drawbacks and bottleneck issues in such metal−organic batteries.…”

Raman spectroscopy and correlative‐Raman technology excel as an optimal stage for carbon‐based electrode materials in electrochemical energy storage

“…Such carbon materials often have a distinct layer structure of graphite that allows charged ions to be intercalated to form acceptor-type graphite-intercalated compounds (GIC). [61,62] Taking the formation of GIC by anions intercalated in graphite cathode as an example, there is a large height between the carbon planes of GIC. That is, the interaction between the layers is weakened.…”

Current Collector-Free Reduced Graphene Oxide Aerogel Cathode for High Energy Density Dual-Ion Batteries

“…2,3 As a new type of energy storage system, the energy density of dual-ion batteries (DIBs) is expected to be comparable to that of commercial lithium ion batteries (LIBs), benefiting from the high voltage of the positive electrode reaction. 4 In addition, the DIB also has the characteristics of a low cost and environmental friendliness because carbon materials are often used as cathode active materials. 5 Metal foils (e.g., aluminum foil) are often used as the current collector for DIBs, but frequently these problems are unavoidable.…”

“…So, the mass ratio of the rGO cathode in a packaged battery should be ≈ m m 0.54 c (4) and the relationship between E c and E b is…”

“…With the rapid development of portable electronic devices and electric vehicles, the importance of advanced energy storage systems with high energy density, power density, and safety has become increasingly prominent . Realizing the combination of high energy density and high power density has always been a hot spot for researchers of electrochemical energy storage. , As a new type of energy storage system, the energy density of dual-ion batteries (DIBs) is expected to be comparable to that of commercial lithium ion batteries (LIBs), benefiting from the high voltage of the positive electrode reaction . In addition, the DIB also has the characteristics of a low cost and environmental friendliness because carbon materials are often used as cathode active materials …”