Synthesis and Electrochemical Properties of Monoclinic LiMnBO[sub 3] as a Li Intercalation Material

Abstract

We investigated the structural stability and electrochemical properties of LiMnBO 3 in the hexagonal and monoclinic form with ab initio computations and, for the first time, report electrochemical data on monoclinic LiMnBO 3 . In contrast to the negligible Li-storage capacity in the hexagonal LiMnBO 3 , a second cycle discharge capacity of 100 mAh/g was achieved in the monoclinic LiMnBO 3 , with good capacity retention over multiple cycles. Elevated temperature cycling indicates that the capacity of monoclinic LiMnBO 3 is kinetically limited, and further improvement may be expected by addressing the Li ion and/or electron transport limitations.