A High-Capacity Cathode for Lithium Batteries Consisting of Porous Microspheres of Highly Amorphized Iron Fluoride Densified from Its Open Parent Phase

作者：Li Chilin^*; Mu Xiaoke; van Aken Peter A; Maier Joachim

来源：Advanced Energy Materials, 2013, 3(1): 113-119.

DOI：10.1002/aenm.201200209

• amorphized iron fluoride
• high-capacity cathodes
• porous microspheres
• lithium batteries
• ionic liquids
• open frameworks

An FeF3 cathode with very high reversible capacity, exceeding 200 mAh g-1, is achieved by amorphizing of FeF3. The amorphization is achieved by densifying the open structure phase along with the removal of channel H2O at 0 degrees C in BmimBF4. This process is accompanied by a voltage increase of 200 mV. The generation of a hierarchical electron/ion wiring network, enabled by the interaction of ionic liquid with carbon nanotube and FeF3 surfaces, significantly improves the reversibility.

• 出版日期2013-1