Fe2O3 Nanoparticle Seed Catalysts Enhance Cyclability on Deep (Dis)charge in Aprotic LiO2 Batteries

• DOI: 10.1002/aenm.201703513
• Publication Date: 2018-03-12T08:02:39Z
• Authors: Zhaolong Li; Swapna Ganapathy; Yaolin Xu; Quanyao Zhu; Wen Chen; Ivan Kochetkov; Chandramohan George; Linda F. Nazar; Marnix Wagemaker
• Keywords: Carbon fibers

Abstract Although the high energy density of LiO 2 chemistry is promising for vehicle electrification, poor stability and parasitic reactions associated with carbon‐based cathodes insulating nature discharge products limit their rechargeability density. In this study, a cathode material consisting α‐Fe O 3 nanoseeds carbon nanotubes (CNT) presented, which achieves excellent cycling on deep (dis)charge capacity. The initial capacity Fe /CNT electrode reaches 805 mA h g −1 (0.7 cm −2 ) at 0.2 , while maintaining 1098 (0.95 after 50 cycles. operando structural, spectroscopic, morphological analysis evolution Li indicates preferential growth . similar d ‐ spacing (100) (104) planes suggest that latter epitaxially induces nucleation. This results in larger primary crystallites smaller secondary particles compared to deposited CNT, enhances reversibility formation leads more stable interfaces within electrode. mechanistic insights into dual‐functional materials act both as host substrates promote redox batteries represent new opportunities optimizing product morphology, leading coulombic efficiency.