Improved electrochemical performance of spinel LiMn 2 O 4 in situ coated with graphene-like membrane

Three-dimensional graphene layers prepared by a gas-foaming method for supercapacitor applications

“…The first region originates from the removal of the remaining interlayer moisture, mainly water molecules, as indicated by a distinct 25 wt% loss at 100-200°C [33]. The second region involves a 45 wt% loss at 200-300°C, which is attributed to the removal of oxygen-containing functional groups [34]. The TGA curve of NH 4 Cl essentially exhibits one major weight loss region at 250-320°C, corresponding to the complete decomposition of NH 4 Cl into NH 3 and HCl.…”

Interface modification in high voltage spinel lithium-ion battery by using N-methylpyrrole as an electrolyte additive

“…Conducting polymer coating is also reported as another strategy, which not only be able to protect the surface of cathode, but also to serve as a conductive matrix. Compounds such as aniline [17,18], pyrrole [19,20], 3,4-ethylenedioxythiophene [21,22], acrylonitrile [23] [24]. Employing monomer units of conducting polymers as electrolyte additives is a more economic and effective way to in-situ coat the electrode [25][26][27].…”

A core–shell structure spinel cathode material with a concentration-gradient shell for high performance lithium-ion batteries

“…Thus, the improvement in the electrochemical reversibility and stability of LiMn 2 O 4 at elevated temperatures becomes more and more important. In order to solve the above problem, many methods such as fabrication of nonstoichiometric spinels [19], doping with foreign ions [20], application of coatings [21], or utilization of electrolyte additives or different electrolytes have been investigated to improve the cyclability of LiMn 2 O 4 [22].…”