Breaking the Electronic Conductivity Bottleneck of Manganese Oxide Family for High‐Power Fluorinated Graphite Composite Cathode by Ligand‐Field High‐Dimensional Constraining Strategy

Abstract

under the ligand field and provides three feasible approaches for overcoming the common conductivity challenge of wide TMO systems. This strategy for developing high-conductivity TMOs not only promotes the design of high-power composite cathode but possesses solid practical values in electrochemical fields such as energy storage and electrocatalysis.

Enhanced sodium ion storage in MnO2 through asymmetric orbital hybridization induced by spin-paired ion doping

“…62–64 Prior research has postulated that increased covalency between two bonded atoms results in a more significant overlap of their surrounding electron clouds, thereby bolstering the electron transfer capability of the material. 63,65 Our theoretical investigations offer compelling evidence that the faint orbital hybridization between Sn 4+ 4d and O 2p in Sn–MnO 2 amplifies the orbital hybridization of Mn (3d-e g )–O (2p). These optimized orbital interactions have the potential to considerably enhance electron transfer capability, leading to an improved energy storage capacity for Sn–MnO 2 .…”

Revealing the Mechano‐Electrochemical Coupling Behavior and Discharge Mechanism of Fluorinated Carbon Cathodes toward High‐Power Lithium Primary Batteries

“…The maximum power density achieved by the FGNSs cathode was 31 654 W kg −1 at 20 C, which far exceeded that of the CF (i.e., 9048 W kg −1 ) at 5 C. Thus, as shown in Figure 1i and Table S1 (Supporting Information), the FGNSs cathode prepared in this study demonstrates remarkable electrochemical performance in term of the discharge rate and power density of LPBs, which is attributed to the unique 3D conducting network formed by the nanosheets. [11,14,17,[42][43][44][45][46][47] Volume expansion and surface passivation caused by the accumulation of the inactive product LiF during lithiation is one of the main disadvantages of CF x , which severely affects the conversion rate and structural stability of the active material. [5] Therefore, to compare the expansion behavior of the CF with a bulk structure and the FGNSs with a nanosheet structure, we performed an SEM characterization of the electrode surface/section before and after discharge.…”

“…Considerable efforts have been expended to improve the electronic conductivity of CF x materials without compromising their fluorine content, such as by designing carbon precursors, [8,9] adjusting the fluorination process, [10,11] optimizing the electrolyte system, [12,13] and compounding with conductive materials. [14,15] Among these efforts, the development of various nanostructured fluorinated carbon materials through the design of carbon precursors has received considerable attention and achieved favorable results. Zhou et al prepared fluorinated graphitized carbon nanotubes with an F/C ratio of 0.81 (FGCNT-0.81) as the cathode for lithium/sodium primary batteries using graphitized carbon nanotubes as the carbon source.…”

Quantum Chemical Analysis of the Correlation between Electrode Potential and Redox Center of Li‐Insertion Materials: Olivine, Layered and Spinel Structures, and Aqua‐Complexes

“…"The electrochemical properties other than the electrode potential are out of scope in this paper, necessitating further investigations into crucial engineering aspects, such as the enhancement of electrode properties through the combination of distinct electrode materials. [70][71][72] In addition, the combining these calculation results with multi-scale modeling and simulation [73][74][75] will lead to a deeper fundamental comprehension of the electrochemical properties of lithium insertion materials.…”