title: Performance improvement of lithium manganese phosphate by controllable morphology tailoring with acid-engaged nano engineering.
abstract: Olivine-type lithium manganese phosphate (LiMnPO4) has been considered as a promising cathode for next-generation Li-ion batteries. Preparation of high-performance LiMnPO4 still remains a great challenge because of its intrinsically low Li-ion/electronic conductivity. In this work, significant performance enhancement of LiMnPO4 has been realized by a controllable acid-engaged morphology tailoring from large spindles into small plates. We find that acidity plays a critical role in altering the morphology of the LiMnPO4 crystals. We also find that size decrease and plate-like morphology are beneficial for the performance improvement of LiMnPO4. Among the plate-like samples, the one with the smallest size shows the best electrochemical performance. After carbon coating, it can deliver high discharge capacities of 104.0 mAh g(-1) at 10 C and 85.0 mAh g(-1) at 20 C. After 200 cycles at 1 C, it can still maintain a high discharge capacity of 106.4 mAh g(-1), showing attractive applications in high-power and high-energy Li-ion batteries.
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Guo
authors.forename: Chunyang
authors.initials: C
authors.lastname: Wu
authors.forename: Longhuan
authors.initials: L
authors.lastname: Liao
authors.forename: Jian
authors.initials: J
authors.lastname: Xie
authors.forename: Shichao
authors.initials: S
authors.lastname: Zhang
authors.forename: Peiyi
authors.initials: P
authors.lastname: Zhu
authors.forename: Gaoshao
authors.initials: G
authors.lastname: Cao
authors.forename: Xinbing
authors.initials: X
authors.lastname: Zhao