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

Primary lithium fluorinated graphite (Li/CF x ) batteries with superior energy density are indispensable energy supply for multiple fields, but suffer from sluggish reaction kinetics of CF x cathode. Designing composite cathode emerges as a solution to this problem. Despite the optimal composite component for CF x , the manganese oxide family represented by MnO 2 is still faced with an intrinsic electronic conductivity bottleneck, which severely limits the power density of composite cathode. Here, we propose a cation-induced high-dimensional constraining strategy from the perspective of ligand-field stacking structure topological design, which breaks the molecular orbital hybridization of pristine semiconductive oxides to transform them into high-conductivity metallic state while competitively maintaining structural stability. Through first-principles phase diagram calculations, mixed-valent Mn 5 O 8 (Mn 2 2+ Mn 3 4+ O 8 ) is explored as an ideal high-dimensional constraining material with satisfied conductivity and large-scale production feasibility. Experiments demonstrate that as-proposed CF x @Mn 5 O 8 composite cathode achieves 2.36 times the power density (11399 W kg -1 ) of pristine CF x and a higher CF x conversion ratio (86%). Such a high-dimensional field-constraining strategy is rooted in our established four-quadrant electronic structure tuning framework, which fundamentally changes the orbital symmetry under ligand field to overcome the common conductivity challenge of wide transition metal oxide materials. This article is protected by copyright. All rights reserved.