Lithium‐Ion Batteries: Operando Magnetometry Probing the Charge Storage Mechanism of CoO Lithium‐Ion Batteries (Adv. Mater. 12/2021)

Abstract

In article number 2006629, Hongsen Li, Yunze Long, Qiang Li, and co‐workers use an advanced operando magnetometry technique to probe the charge‐storage mechanism of CoO lithium‐ion batteries, showing that the anomalous discharge capacity in this particular system is associated with both the reversible formation of a spin capacitor and the growth of a polymeric film at low voltages. The key catalytic role of metallic Co in assisting the polymeric film formation is demonstrated, which is helpful for the design of new types of energy‐storage devices and improving the energy density for future battery designs.

Revealing the formation process of extra capacitance in Fe3O4/Li batteries with the first-principles study

“…The process of forming a polymer film can be described by the following equations, as reported in prior literature [15]: x xe…”

“…In 2021, the conversion reactions, formation of spin capacitors, and polymeric films are considered as the three processes of discharge reaction in CoO Lithium-ion batteries [15]. It is plausible that the extra capacity of transition metal LIB provides a reasonable explanation for these findings [14,15].…”

“…Although the previous studies [14,15] are meaningful, further investigation is needed to understand the process of Fe 0 acquiring electrons and participating in discharge processes. In our study, Fe/Li Fe structures are established.…”

N‐doped Mesoporous Carbon Loaded Co Nanoparticles as Highly Effective Non‐noble Metal Electrocatalysts Towards Oxygen Reduction Reaction in Alkaline Solution

“…Among them, heteroatom‐doped carbon materials coupled with transition metals such as nickel, cobalt, iron, and manganese have been widely accepted as the most promising candidates to replace the platinum, and these catalysts show very high ORR activity [18–21] . Some studies demonstrate that nitrogen‐doped carbon‐supported metal nanoparticles can serve as promising electrocatalysts [22–26] . Therefore, it is of great significance to find a simple and low‐cost method to prepare electrocatalysts with good catalytic activity.…”

Long life exceeding 10 000 cycles for aluminum-ion batteries based on an FeTe2@GO composite as the cathode

“…1 The state-of-the-art Li-ion batteries have become the primary devices used to store energy due to their outstanding performance and stability. 2,3 Nevertheless, the shortage of sources of lithium and safety concerns are becoming critical challenges for the rapidly expanding market. 4 Therefore, it is urgent to develop new battery systems with high energy densities, long lifespans, and the absence of safety issues.…”