Synthesis and Characterization of the LiMnBO₃–LiCoBO₃ Solid Solution and Its Use as a Lithium-Ion Cathode Material

Abstract

A complete solid solution of m-Li(Mn1-xCox)BO3 has been successfully synthesized for the first time with the idea of improving the average potential versus m-LiMnBO3. These compounds have been obtained by a multiple-step process. Interestingly, transmission electron microscopy results indicate that the C2/c space group previously reported for m-LiMBO3 (M = Mn, Co) cannot describe m-Li(Mn1-xCox)BO3 compounds. Each material shows electrochemical activity, without in situ carbon coating. Despite a large polarization, we report a capacity of almost 60 mAh/g at the first discharge at C/20 rate with good stability up to five cycles for LiMn0.7Co0.3BO3.

Spray-Drying Synthesis of LiFeBO3/C Hollow Spheres With Improved Electrochemical and Storage Performances for Li-Ion Batteries

“…These problems make it challenging to achieve LiFeBO 3 -based materials with high reversible specific capacity and good storage performance. In order to improve the electrochemical performance of LiFeBO 3 -based materials, various strategies have been introduced, such as metal-ions doping, conductive carbon coating, and nano-architecturing (Aravindan and Umadevi, 2012; Afyon et al, 2013; Le Roux et al, 2015; Sin et al, 2015). Among these methods, carbon coating is a promising and effective way to improve the properties of LiFeBO 3 , which attributes to the improved conductivity and the prevention of moisture corrosion.…”

Effect of PVP Coating on LiMnBO3 Cathodes for Li-Ion Batteries

“…The two polymorphs have the same theoretical capacity of 222 mAh g −1 , while h-LiMnBO 3 has a higher redox voltage and m-LiMnBO 3 has better electrochemical activity [5]. More studies focus on the improvement of m-LiMnBO 3 [9][10][11][12].…”

Synthesis, thermal, structural and electrical properties of vanadium-doped lithium-manganese-borate glass and nanocomposites

“…While many reports have been published on phosphate polyanion cathode materials [7], in recent years, there has been also interest in lithium-manganese-borate (nominally LiMnBO 3 ) compound. It is due to its high theoretical gravimetric capacity (222 mAhg −1 [8][9][10][11][12]) that originates from low molar mass of the borate group. Moreover, B 2 O 3 is a very well-known glass former.…”