NaCl-Template Assisted Synthesis of 3D Honeycomb-Like LiMnPO4/C with High Rate and Stable Performance as Lithium-Ion Battery Cathodes

Abstract

Constructing electrode materials with three-dimensional (3D) configurations has been presented as a promising way to achieve excellent properties in energy storage. Here, the cathode material LiMnPO4 with honeycomb-like structure was fabricated via a simple NaCl-template-assisted synthesis strategy. The NaCl particles served as a sacrificial template to grow LiMnPO4/C nanoparticles on the surfaces by calcination. The robust 3D honeycomb-like LiMnPO4/C network possesses a highly crystalline structure and intimate interfacial bonding between adjacent LiMnPO4/C networks, which provides more electroactive sites for lithium-ion adsorption and intercalation as well as a highly conductive network for both lithium-ion transport and electrons transfer. Furthermore, the unique honeycomb-like architecture can effectively buffer volume expansion and prevent the agglomeration of active materials. Remarkably, an excellent reversible capacity of 161.5 mAh g–1 at 0.05 C and superior capacity retention with 96.4% after 20...