LiI embedded meso-micro porous carbon polyhedrons for lithium iodine battery with superior lithium storage properties

In Situ‐Derived Porous SiO2/Carbon Nanocomposite from Lichens for Lithium‐Ion Batteries

“…Both of the electrodes have one semicircle in the high‐frequency range and a sloping straight line in the low‐frequency range. The semicircle in high frequency is attributed to the lithium‐ion transfer impedance ( R ct ), whereas the inclined line in low‐frequency implies the lithium‐ion diffusion impedance . It is clear that the resistance of the semicircles for both the samples before and after acid‐washing are decreased after first discharge/charge from 345.7 and 255.8 to 179.7 and 132.2 Ω, respectively.…”

Boosting Energy Storage via Confining Soluble Redox Species onto Solid–Liquid Interface

“…In addition, certain iodine species (iodine and iodide) are usually soluble in the electrolyte, allowing these species to diffuse and shuttle to the anode and react with it, giving rise to fast self‐discharge, low Coulombic efficiency, and severe capacity fading. [ 146–148 ]…”

Honeycomb‐like carbon materials derived from coffee extract via a “salty” thermal treatment for high‐performance Li‐I2 batteries

“…However, a smaller peak is visible at 3.0 V which also confirms the existence of redox charge storage. 15,16 Figure 5B to 5F shows the pseudo-capacitive contribution to total iodine storage at different rates (2-10 mV•S −1 ). Expectedly, the pseudocapacitive contribution of 55.8% is obtained at a rate of 2 mV•S −1 , and it gradually increases to 62.2%, 66.8%, 70.7%, and 74.3% at the scan rate of 4, 6, 8, and 10 mV•S −1 , respectively.…”

“…Lithium-iodine (Li-I 2 ) battery could be a possible solution for these challenges because of its high energy and power density. [11][12][13][14][15][16][17][18] Li-I 2 battery has a fast electrochemical conversion of redox pair (I − /I 3 − ) with a high theoretical specific capacity of 211 mAh•g −1 . More importantly, the dissolved redox couples (I − /I 3 − ) can eliminate the effect of the lattice barrier of solid electrode and reduce the internal resistance of traditional LIBs, delivering a highpower performance.…”

“…Generally, physical adsorption of microporous material and chemical adsorption of heteroatoms to I 2 molecules are promising strategies for addressing these challenges. 11,15,16,[22][23][24][25] Being an outstanding conductive and porous medium for fast electron transfer and rapid iodine redox reactions, N-graphene, 18 Ti 3 C 2 T x MXene, 27 and carbon nanotubes 28 have been used to fabricate the interlayer for these purposes. Additionally, they can offer large reaction interfaces for the pseudo-capacitive storage in Li-I 2 batteries.…”