An Enhanced Electrode via Coupling with a Conducting Molecule to Extend Interfacial Reactions

Abstract

An electron conductive matrix, or collector, facilitates electron transport in an electrochemical device. It is stationary and does not change during the entire operation once it is built. The interface of this matrix and an electrode is constructed at a 2D level at the micro‐scale, and naturally limits the breadth and depth of electrochemical reactions. Herein, the idea of an enhanced electrode coupled with a conducting molecule that can extend interfacial reactions is first introduced. With a spatialized interspace, this electrode can change the present understanding of the electrode process and opens up a new realm of electrode‐based reaction chemistry. A lithium–sulfur (Li–S) battery is used as the target for implementing the enhanced electrode owing to the complex multi‐electron reaction. Through the interaction of π–π stacking between graphite‐based carbon and iron (II) phthalocyanine (FePc), soluble FePc can be decorated on the surface of an electrode that has the capability of transporting electrons. The scanning tunneling microscope break junction characterization and density functional theory indicate that FePc has a strong molecular electronic conductivity. The reactants obtain electrons more easily from the conducting molecule than from the collector directly. As a result, the performance of the corresponding Li–S battery considerably improves.

Fe–N hollow mesoporous carbon spheres with high oxidase-like activity for sensitive detection of alkaline phosphatase

“…FePC possessed the metal macrocycle compounds which could interact with the benzene ring structure in APF by π–π stacking. 26–28 In addition, the abundant nitrogen content in APF acted as coordination sites to anchor Fe atoms in FePC through the metal–nitrogen bond. 29 After the etching of silica, the morphologies of Fe–N HMCS and HMNCS were characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM).…”

Ultra-High-Capacity Lithium Metal Batteries Based on Multi-Electron Redox Reaction of Organopolysulfides including Conductive Organic Moieties

“…This indicates that high-order lithium polysulfides produced from the sulfur chains during the discharge process dissolved into organic electrolyte, which caused the poor cycle performances [ 14 ]. To solve this problem, it is important to introduce Lewis acidic, such as iron phthalocyanine-based complexes [ 28 , 29 ], because it interacts with Lewis basic lithium polysulfides. Work addressing this challenge is currently underway to contribute to the development of next-generation rechargeable batteries with high capacities and excellent cycle performance.…”

Advancements in Battery Monitoring: Harnessing Fiber Grating Sensors for Enhanced Performance and Reliability

“…Deng et al from our team designed a variety of special electrode materials and applied them to various new energy storage devices, such as lithium-ion (Li-ion) batteries, sodiumion batteries, lithium-sulfur batteries, and supercapacitors, which greatly improved the performance of the batteries. In addition, they have systematically studied the interfacial reactions in energy storage systems and elaborated various reaction mechanisms [43][44][45][46][47]. While different battery types undergo unique charging and discharging processes, they fundamentally rely on internal chemical reactions for energy conversion.…”