Controllable fabrication of LiMnPO4 microspheres assembled by radially arranged nanoplates with highly exposed (010) facets for an enhanced electrochemical performance†
An LiMnPO4 cathode with an active crystal orientation can contribute towards its charge transfer kinetics. However, the development of a facile strategy for the manipulation of its active crystal orientation remains a great challenge. Here, we reported a simple solvothermal method to prepare LiMnPO4 hollow microspheres assembled by radially aligned nanoplates with the (010)-exposed surface and thin  thickness. The amount of the NH4H2PO4 additive was the key factor that controlled the ac-plane surface area of the assembled subunits of the microspheres. When applied for the cathode, the nanoplate-assembled microspheres exhibited superior rate capability compared to those of the nanoprism-assembled and thick plate-assembled microspheres, showing the discharge capacities of ∼130 mA h g−1 at 1 C and ∼81 mA h g−1 at 10 C. The improved electrochemical performance could be attributed to the advantages of the large (010) surface and the thin  thickness of the assembled nanoplates, which may facilitate easy access to the surface and rapid migration of lithium ions.