NaCl-assisted triethylene glycol combustion preparation of lithium manganese oxides with hierarchical mesopores for energy storage

Abstract

The development of electroactive materials with affordable prices, strong activity, and outstanding cyclic life are desirable for energy storage. Herein, a novel NaCl-assisted triethylene glycol (TEG) combustion strategy was adopted to prepare lithium manganese oxides (LMO) with hierarchical mesopores for energy storage. The electrochemical activity of LMO strongly depends on the dosage of NaCl. The LMO-200 shows optimal electrochemical activity, which can deliver 120.1 C g−1 of discharge capacity at 0.25 A g−1. When employed as electroactive material for supercapacitors, Li-ion batteries, and LMO//Zn batteries, LMO-200 delivered outstanding energy storage performance. The LMO-200 with hierarchical mesopores can offer a good deal of active sites and suppress the volume change during charge/discharge cycles, thus boosting the specific capacity, rate capability, and cyclic performance. The present work not only developed a convenient route to LMO with hierarchical mesopores but also displayed its wide applications for electrochemical energy storage.