Flexible Phosphorus-Doped Graphene/Metal–Organic Framework-Derived Porous Fe<sub>2</sub>O<sub>3</sub> Anode for Lithium-Ion Battery
Jian Ma, Yue Kong, Shunchang Liu, Yuanting Li, Jibo Jiang, Qiong Zhou, Yanshan Huang, Sheng Han
Abstract
Porous metal oxides and heteroatomic doping of carbon materials were extensively studied in lithium-ion batteries (LIBs). We designed an assembly of porous Fe2O3 nanoframework into three-dimensional P-doped graphene framework (PGF@pFe2O3NF) using metal–organic frameworks as the precursor of porous Fe2O3 and thermal treatment to obtain P doped graphene. The hierarchical structure with flexible macroporous P-doped graphene network and Fe2O3 nanoporous framework can effectively promote lithium diffusion. The flexible PGF@pFe2O3NF is directly compressed as binder-free LIB anode. It exhibited excellent capacity (1106 mAh g–1), rate performance (410 mAh g–1 at 4000 mA g–1), and superlong cycling performance of 88.2% capacity retention. Moreover, the PGF@pFe2O3NF-based LIB full cell is also with a high energy of 350.8 Wh kg–1. We offered a strategy to develop advanced porous Fe2O3-based anode for high-practicability LIBs.