Controllable fabrication of LiMnPO₄ microspheres assembled by radially arranged nanoplates with highly exposed (010) facets for an enhanced electrochemical performance

Abstract

LiMnPO4 hollow microspheres assembled by radially aligned nanoplates with a high percentage of exposed (010) facets are prepared to improve the rate capability.

Effect of Synthesis Processes on the Microstructure and Electrochemical Properties of LiMnPO4 Cathode Material

“…The amount of raw materials has an effect on morphology and crystal plane in the solvothermal method. Pan et al 57 the amount of NH 4 H 2 PO 4 , the products presented three types of microspheres, namely, nanoprism-assembled, plate-assembled, and thick plate-assembled microspheres. The plateassembled microsphere displayed the highly exposed (010) surface, shortening the migration distance of Li + ions.…”

“…The amount of raw materials has an effect on morphology and crystal plane in the solvothermal method. Pan et al prepared LiMnPO 4 crystals with different morphologies by using Li 3 PO 4 , (C 2 H 3 O 2 ) 2 Mn·4H 2 O and NH 4 H 2 PO 4 as raw materials. With an adjustment of the amount of NH 4 H 2 PO 4 , the products presented three types of microspheres, namely, nanoprism-assembled, plate-assembled, and thick plate-assembled microspheres.…”

Preparation of nanorod-assembled CNT-embedded LiMnPO4 hollow microspheres for enhanced electrochemical performance of lithium-ion batteries

“…The final step is the fabrication of the LiMnPO 4 /CNTs hollow microspheres. Through the effect of ammonium-based salts, [41][42][43] the Li 3 PO 4 /CNTs hollow microspheres react with Mn 2+ cations during the solvothermal process.…”

“…A detailed discussion on the reaction has been reported in our previous works. [41][42][43] The XRD patterns of the samples are shown in Fig. 2a In order to determine the amount of CNTs in the LiMnPO 4 /CNTs hollow microspheres, TG analyses were carried out in the temperature range of 50-800 °C at a heating rate of 10 °C min −1 in air, as shown in Fig.…”

“…Importantly, Li + diffusion along the [010] direction has been proposed in olivine-type crystals based on calculations and experiments. 14,42,49,50 Therefore, the LiMnPO 4 /CNTs hollow microspheres with exposed (010) surfaces are expected to achieve high electrochemical performance in lithium-ion batteries.…”