| With the improvement of requirements for the energy storage technology,the traditional graphite anode cannot meet the needs of next-generation high-energy lithium ion batteries（LIBs）because of the low theoretical Li-storage capacity(372 mAh g-1),poor rate,cycling performance and high sensitivity to electrolyte.To meet these requirements,anode materials need constant innovation and development,including higher capacity,better rate capability,and longer cycle life.As a promising anode candidate for LIBs,MnO has attracted wide attentions owing to its theoretically high Li-storage capacity(756 mAh g-1),lower working voltage and polarization,low cost,environmental friend liness,and abundant resources.In this article,we develop a facile and low-cost strategy to fabricate a unique porous MnO@N-doped carbon（MnO@N-C）nanotube and demonstrate its outstanding Li-storage properties as anode material for LIBs.Benefiting from its unique 1D porous features,the prepared MnO@N-C electrodes exhibit high reversible specific capacity(971.8 mAh g-1 at0.1 A g-1),superb high-rate capability(359.5 mAh g-1 at 30 A g-1)and remarkable cycling stability(441.5 mA h g-1 after 3500 cycles at 10 A g-1).Such superior electrochemical performance should be due to the high conductivity and protection effects of N-doped carbon layer,and adequate internal voids in the MnO@N-C to effectively accommodate the volume changes of MnO during cycling.In addition,it is also disclosed that the high capacity contribution arises from the pseudocapacitive charge storage. |
