Improving Interfacial Electrochemistry of LiNi 0.5 Mn 1.5 O 4 Cathode Coated by Mn 3 O 4

In this work the surface of LiNi \begin{document}$_{0.5}$\end{document} Mn \begin{document}$_{1.5}$\end{document} O \begin{document}$_{4}$\end{document} (LMN) particles is modified by Mn \begin{document}$_{3}$\end{document} O \begin{document}$_{4}$\end{document} coating through a simple wet grinding method, the electronic conductivity is significantly improved from 1.53 \begin{document}$\times$\end{document} 10 \begin{document}$^{-7}$\end{document} S/cm to 3.15 \begin{document}$\times$\end{document} 10 \begin{document}$^{-5}$\end{document} S/cm after 2.6 wt% Mn \begin{document}$_{3}$\end{document} O \begin{document}$_{4}$\end{document} coating. The electrochemical test results indicate that Mn \begin{document}$_{3}$\end{document} O \begin{document}$_{4}$\end{document} coating dramatically enhances both rate performance and cycling capability (at 55 ℃) of LNM. Among the samples, 2.6 wt% Mn \begin{document}$_{3}$\end{document} O \begin{document}$_{4}$\end{document} -coated LNM not only exhibits excellent rate capability (a large capacity of 108 mAh/g at 10 C rate) but also shows 78% capacity retention at 55 ℃ and 1 C rate after 100 cycles.