Perpustakaan Digital ITB

A facile strategy to construct composites ofamorphous FePO4(a-FePO4) nanoparticles and carbonadditives with high dispersion and tap density was developedin this work, in which the a-FePO4·2H2O nanoparticles werehandled without drying until being mixed with carbonnanomaterials in water to assure high dispersion of a-FePO4·2H2O nanoparticles and carbon nanomaterials; the controlledsedimentation was exploited by rapid adjustment of the pHvalue via a micromixer to obtain the composites that are easyto manipulate; the composites were endowed with high tapdensity after simple ball-milling. Using this strategy, hybridcarbon additives were uniformly introduced into the a-FePO4cathode to form a hierarchical 3D conductive network.Through proper distribution of these components to provideboth long- and short-range electron pathways, the reversible discharge capacity could reach 175.6 mA h g?1at 0.1 C and 139.1mA h g?1at 5 C. The composites of a-FePO4, carbon black, and carbon nanotubes (CNT) exhibited the distinct advantages oflow cost and excellent rate capacity over the composites of a-FePO4and CNT, indicating the importance of optimizing thehierarchical structure of cathode composites. The high effectiveness of this construction strategy to build a hierarchicalconductive network is also promisingly used for the development of other functional nanocomposites.